0072ea2c536113c3258371cba6bc2211b23fb93d
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl-sta.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
4  *
5  * Portions of this file are derived from the ipw3945 project, as well
6  * as portions of the ieee80211 subsystem header files.
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of version 2 of the GNU General Public License as
10  * published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along with
18  * this program; if not, write to the Free Software Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20  *
21  * The full GNU General Public License is included in this distribution in the
22  * file called LICENSE.
23  *
24  * Contact Information:
25  *  Intel Linux Wireless <ilw@linux.intel.com>
26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27  *
28  *****************************************************************************/
29
30 #include <net/mac80211.h>
31 #include <linux/etherdevice.h>
32
33 #include "iwl-dev.h"
34 #include "iwl-core.h"
35 #include "iwl-sta.h"
36
37 #define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
38 #define IWL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
39
40 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
41 {
42         int i;
43         int start = 0;
44         int ret = IWL_INVALID_STATION;
45         unsigned long flags;
46
47         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
48             (priv->iw_mode == NL80211_IFTYPE_AP))
49                 start = IWL_STA_ID;
50
51         if (is_broadcast_ether_addr(addr))
52                 return priv->hw_params.bcast_sta_id;
53
54         spin_lock_irqsave(&priv->sta_lock, flags);
55         for (i = start; i < priv->hw_params.max_stations; i++)
56                 if (priv->stations[i].used &&
57                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
58                                          addr))) {
59                         ret = i;
60                         goto out;
61                 }
62
63         IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
64                               addr, priv->num_stations);
65
66  out:
67         spin_unlock_irqrestore(&priv->sta_lock, flags);
68         return ret;
69 }
70 EXPORT_SYMBOL(iwl_find_station);
71
72 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
73 {
74         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
75                 return IWL_AP_ID;
76         } else {
77                 u8 *da = ieee80211_get_DA(hdr);
78                 return priv->cfg->ops->smgmt->find_station(priv, da);
79         }
80 }
81 EXPORT_SYMBOL(iwl_get_ra_sta_id);
82
83 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
84 {
85         unsigned long flags;
86
87         spin_lock_irqsave(&priv->sta_lock, flags);
88
89         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
90             !(priv->stations_39[sta_id].used & IWL_STA_DRIVER_ACTIVE))
91                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station %d\n",
92                         sta_id);
93
94         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
95         IWL_DEBUG_ASSOC(priv, "Added STA to Ucode: %pM\n",
96                         priv->stations[sta_id].sta.sta.addr);
97
98         spin_unlock_irqrestore(&priv->sta_lock, flags);
99 }
100
101 static int iwl_add_sta_callback(struct iwl_priv *priv,
102                                    struct iwl_cmd *cmd, struct sk_buff *skb)
103 {
104         struct iwl_rx_packet *res = NULL;
105         struct iwl_addsta_cmd *addsta =
106                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
107         u8 sta_id = addsta->sta.sta_id;
108
109         if (!skb) {
110                 IWL_ERR(priv, "Error: Response NULL in REPLY_ADD_STA.\n");
111                 return 1;
112         }
113
114         res = (struct iwl_rx_packet *)skb->data;
115         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
116                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
117                           res->hdr.flags);
118                 return 1;
119         }
120
121         switch (res->u.add_sta.status) {
122         case ADD_STA_SUCCESS_MSK:
123                 iwl_sta_ucode_activate(priv, sta_id);
124                  /* fall through */
125         default:
126                 IWL_DEBUG_HC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
127                              res->u.add_sta.status);
128                 break;
129         }
130
131         /* We didn't cache the SKB; let the caller free it */
132         return 1;
133 }
134
135 int iwl_send_add_sta(struct iwl_priv *priv,
136                      struct iwl_addsta_cmd *sta, u8 flags)
137 {
138         struct iwl_rx_packet *res = NULL;
139         int ret = 0;
140         u8 data[sizeof(*sta)];
141         struct iwl_host_cmd cmd = {
142                 .id = REPLY_ADD_STA,
143                 .meta.flags = flags,
144                 .data = data,
145         };
146
147         if (flags & CMD_ASYNC)
148                 cmd.meta.u.callback = iwl_add_sta_callback;
149         else
150                 cmd.meta.flags |= CMD_WANT_SKB;
151
152         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
153         ret = iwl_send_cmd(priv, &cmd);
154
155         if (ret || (flags & CMD_ASYNC))
156                 return ret;
157
158         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
159         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
160                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
161                           res->hdr.flags);
162                 ret = -EIO;
163         }
164
165         if (ret == 0) {
166                 switch (res->u.add_sta.status) {
167                 case ADD_STA_SUCCESS_MSK:
168                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
169                         IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
170                         break;
171                 default:
172                         ret = -EIO;
173                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
174                         break;
175                 }
176         }
177
178         priv->alloc_rxb_skb--;
179         dev_kfree_skb_any(cmd.meta.u.skb);
180
181         return ret;
182 }
183 EXPORT_SYMBOL(iwl_send_add_sta);
184
185 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
186                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
187 {
188         __le32 sta_flags;
189         u8 mimo_ps_mode;
190
191         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
192                 goto done;
193
194         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
195
196         sta_flags = priv->stations[index].sta.station_flags;
197
198         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
199
200         switch (mimo_ps_mode) {
201         case WLAN_HT_CAP_SM_PS_STATIC:
202                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
203                 break;
204         case WLAN_HT_CAP_SM_PS_DYNAMIC:
205                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
206                 break;
207         case WLAN_HT_CAP_SM_PS_DISABLED:
208                 break;
209         default:
210                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
211                 break;
212         }
213
214         sta_flags |= cpu_to_le32(
215               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
216
217         sta_flags |= cpu_to_le32(
218               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
219
220         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
221                 sta_flags |= STA_FLG_FAT_EN_MSK;
222         else
223                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
224
225         priv->stations[index].sta.station_flags = sta_flags;
226  done:
227         return;
228 }
229
230 /**
231  * iwl_add_station_flags - Add station to tables in driver and device
232  */
233 u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
234                          u8 flags, struct ieee80211_sta_ht_cap *ht_info)
235 {
236         int i;
237         int sta_id = IWL_INVALID_STATION;
238         struct iwl_station_entry *station;
239         unsigned long flags_spin;
240
241         spin_lock_irqsave(&priv->sta_lock, flags_spin);
242         if (is_ap)
243                 sta_id = IWL_AP_ID;
244         else if (is_broadcast_ether_addr(addr))
245                 sta_id = priv->hw_params.bcast_sta_id;
246         else
247                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
248                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
249                                                 addr)) {
250                                 sta_id = i;
251                                 break;
252                         }
253
254                         if (!priv->stations[i].used &&
255                             sta_id == IWL_INVALID_STATION)
256                                 sta_id = i;
257                 }
258
259         /* These two conditions have the same outcome, but keep them separate
260            since they have different meanings */
261         if (unlikely(sta_id == IWL_INVALID_STATION)) {
262                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
263                 return sta_id;
264         }
265
266         if (priv->stations[sta_id].used &&
267             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
268                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
269                 return sta_id;
270         }
271
272
273         station = &priv->stations[sta_id];
274         station->used = IWL_STA_DRIVER_ACTIVE;
275         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
276                         sta_id, addr);
277         priv->num_stations++;
278
279         /* Set up the REPLY_ADD_STA command to send to device */
280         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
281         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
282         station->sta.mode = 0;
283         station->sta.sta.sta_id = sta_id;
284         station->sta.station_flags = 0;
285
286         /* BCAST station and IBSS stations do not work in HT mode */
287         if (sta_id != priv->hw_params.bcast_sta_id &&
288             priv->iw_mode != NL80211_IFTYPE_ADHOC)
289                 iwl_set_ht_add_station(priv, sta_id, ht_info);
290
291         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
292
293         /* Add station to device's station table */
294         iwl_send_add_sta(priv, &station->sta, flags);
295         return sta_id;
296
297 }
298 EXPORT_SYMBOL(iwl_add_station_flags);
299
300 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
301 {
302         unsigned long flags;
303         u8 sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
304
305         BUG_ON(sta_id == IWL_INVALID_STATION);
306
307         IWL_DEBUG_ASSOC(priv, "Removed STA from Ucode: %pM\n", addr);
308
309         spin_lock_irqsave(&priv->sta_lock, flags);
310
311         /* Ucode must be active and driver must be non active */
312         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
313                 IWL_ERR(priv, "removed non active STA %d\n", sta_id);
314
315         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
316
317         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
318         spin_unlock_irqrestore(&priv->sta_lock, flags);
319 }
320
321 static int iwl_remove_sta_callback(struct iwl_priv *priv,
322                                    struct iwl_cmd *cmd, struct sk_buff *skb)
323 {
324         struct iwl_rx_packet *res = NULL;
325         struct iwl_rem_sta_cmd *rm_sta =
326                  (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
327         const char *addr = rm_sta->addr;
328
329         if (!skb) {
330                 IWL_ERR(priv, "Error: Response NULL in REPLY_REMOVE_STA.\n");
331                 return 1;
332         }
333
334         res = (struct iwl_rx_packet *)skb->data;
335         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
336                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
337                 res->hdr.flags);
338                 return 1;
339         }
340
341         switch (res->u.rem_sta.status) {
342         case REM_STA_SUCCESS_MSK:
343                 iwl_sta_ucode_deactivate(priv, addr);
344                 break;
345         default:
346                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
347                 break;
348         }
349
350         /* We didn't cache the SKB; let the caller free it */
351         return 1;
352 }
353
354 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
355                                    u8 flags)
356 {
357         struct iwl_rx_packet *res = NULL;
358         int ret;
359
360         struct iwl_rem_sta_cmd rm_sta_cmd;
361
362         struct iwl_host_cmd cmd = {
363                 .id = REPLY_REMOVE_STA,
364                 .len = sizeof(struct iwl_rem_sta_cmd),
365                 .meta.flags = flags,
366                 .data = &rm_sta_cmd,
367         };
368
369         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
370         rm_sta_cmd.num_sta = 1;
371         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
372
373         if (flags & CMD_ASYNC)
374                 cmd.meta.u.callback = iwl_remove_sta_callback;
375         else
376                 cmd.meta.flags |= CMD_WANT_SKB;
377         ret = iwl_send_cmd(priv, &cmd);
378
379         if (ret || (flags & CMD_ASYNC))
380                 return ret;
381
382         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
383         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
384                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
385                           res->hdr.flags);
386                 ret = -EIO;
387         }
388
389         if (!ret) {
390                 switch (res->u.rem_sta.status) {
391                 case REM_STA_SUCCESS_MSK:
392                         iwl_sta_ucode_deactivate(priv, addr);
393                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
394                         break;
395                 default:
396                         ret = -EIO;
397                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
398                         break;
399                 }
400         }
401
402         priv->alloc_rxb_skb--;
403         dev_kfree_skb_any(cmd.meta.u.skb);
404
405         return ret;
406 }
407
408 /**
409  * iwl_remove_station - Remove driver's knowledge of station.
410  */
411 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
412 {
413         int sta_id = IWL_INVALID_STATION;
414         int i, ret = -EINVAL;
415         unsigned long flags;
416
417         spin_lock_irqsave(&priv->sta_lock, flags);
418
419         if (is_ap)
420                 sta_id = IWL_AP_ID;
421         else if (is_broadcast_ether_addr(addr))
422                 sta_id = priv->hw_params.bcast_sta_id;
423         else
424                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
425                         if (priv->stations[i].used &&
426                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
427                                                 addr)) {
428                                 sta_id = i;
429                                 break;
430                         }
431
432         if (unlikely(sta_id == IWL_INVALID_STATION))
433                 goto out;
434
435         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
436                 sta_id, addr);
437
438         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
439                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
440                                 addr);
441                 goto out;
442         }
443
444         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
445                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
446                                 addr);
447                 goto out;
448         }
449
450
451         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
452
453         priv->num_stations--;
454
455         BUG_ON(priv->num_stations < 0);
456
457         spin_unlock_irqrestore(&priv->sta_lock, flags);
458
459         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
460         return ret;
461 out:
462         spin_unlock_irqrestore(&priv->sta_lock, flags);
463         return ret;
464 }
465 EXPORT_SYMBOL(iwl_remove_station);
466
467 /**
468  * iwl_clear_stations_table - Clear the driver's station table
469  *
470  * NOTE:  This does not clear or otherwise alter the device's station table.
471  */
472 void iwl_clear_stations_table(struct iwl_priv *priv)
473 {
474         unsigned long flags;
475         int i;
476
477         spin_lock_irqsave(&priv->sta_lock, flags);
478
479         if (iwl_is_alive(priv) &&
480            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
481            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
482                 IWL_ERR(priv, "Couldn't clear the station table\n");
483
484         priv->num_stations = 0;
485         memset(priv->stations, 0, sizeof(priv->stations));
486
487         /* clean ucode key table bit map */
488         priv->ucode_key_table = 0;
489
490         /* keep track of static keys */
491         for (i = 0; i < WEP_KEYS_MAX ; i++) {
492                 if (priv->wep_keys[i].key_size)
493                         test_and_set_bit(i, &priv->ucode_key_table);
494         }
495
496         spin_unlock_irqrestore(&priv->sta_lock, flags);
497 }
498 EXPORT_SYMBOL(iwl_clear_stations_table);
499
500 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
501 {
502         int i;
503
504         for (i = 0; i < STA_KEY_MAX_NUM; i++)
505                 if (!test_and_set_bit(i, &priv->ucode_key_table))
506                         return i;
507
508         return WEP_INVALID_OFFSET;
509 }
510 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
511
512 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
513 {
514         int i, not_empty = 0;
515         u8 buff[sizeof(struct iwl_wep_cmd) +
516                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
517         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
518         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
519         struct iwl_host_cmd cmd = {
520                 .id = REPLY_WEPKEY,
521                 .data = wep_cmd,
522                 .meta.flags = CMD_ASYNC,
523         };
524
525         memset(wep_cmd, 0, cmd_size +
526                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
527
528         for (i = 0; i < WEP_KEYS_MAX ; i++) {
529                 wep_cmd->key[i].key_index = i;
530                 if (priv->wep_keys[i].key_size) {
531                         wep_cmd->key[i].key_offset = i;
532                         not_empty = 1;
533                 } else {
534                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
535                 }
536
537                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
538                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
539                                 priv->wep_keys[i].key_size);
540         }
541
542         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
543         wep_cmd->num_keys = WEP_KEYS_MAX;
544
545         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
546
547         cmd.len = cmd_size;
548
549         if (not_empty || send_if_empty)
550                 return iwl_send_cmd(priv, &cmd);
551         else
552                 return 0;
553 }
554 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
555
556 int iwl_remove_default_wep_key(struct iwl_priv *priv,
557                                struct ieee80211_key_conf *keyconf)
558 {
559         int ret;
560         unsigned long flags;
561
562         spin_lock_irqsave(&priv->sta_lock, flags);
563
564         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
565                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
566                           keyconf->keyidx);
567
568         priv->default_wep_key--;
569         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
570         ret = iwl_send_static_wepkey_cmd(priv, 1);
571         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
572                       keyconf->keyidx, ret);
573         spin_unlock_irqrestore(&priv->sta_lock, flags);
574
575         return ret;
576 }
577 EXPORT_SYMBOL(iwl_remove_default_wep_key);
578
579 int iwl_set_default_wep_key(struct iwl_priv *priv,
580                             struct ieee80211_key_conf *keyconf)
581 {
582         int ret;
583         unsigned long flags;
584
585         if (keyconf->keylen != WEP_KEY_LEN_128 &&
586             keyconf->keylen != WEP_KEY_LEN_64) {
587                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
588                 return -EINVAL;
589         }
590
591         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
592         keyconf->hw_key_idx = HW_KEY_DEFAULT;
593         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
594
595         spin_lock_irqsave(&priv->sta_lock, flags);
596         priv->default_wep_key++;
597
598         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
599                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
600                         keyconf->keyidx);
601
602         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
603         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
604                                                         keyconf->keylen);
605
606         ret = iwl_send_static_wepkey_cmd(priv, 0);
607         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
608                 keyconf->keylen, keyconf->keyidx, ret);
609         spin_unlock_irqrestore(&priv->sta_lock, flags);
610
611         return ret;
612 }
613 EXPORT_SYMBOL(iwl_set_default_wep_key);
614
615 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
616                                 struct ieee80211_key_conf *keyconf,
617                                 u8 sta_id)
618 {
619         unsigned long flags;
620         __le16 key_flags = 0;
621         int ret;
622
623         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
624
625         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
626         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
627         key_flags &= ~STA_KEY_FLG_INVALID;
628
629         if (keyconf->keylen == WEP_KEY_LEN_128)
630                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
631
632         if (sta_id == priv->hw_params.bcast_sta_id)
633                 key_flags |= STA_KEY_MULTICAST_MSK;
634
635         spin_lock_irqsave(&priv->sta_lock, flags);
636
637         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
638         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
639         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
640
641         memcpy(priv->stations[sta_id].keyinfo.key,
642                                 keyconf->key, keyconf->keylen);
643
644         memcpy(&priv->stations[sta_id].sta.key.key[3],
645                                 keyconf->key, keyconf->keylen);
646
647         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
648                         == STA_KEY_FLG_NO_ENC)
649                 priv->stations[sta_id].sta.key.key_offset =
650                                  iwl_get_free_ucode_key_index(priv);
651         /* else, we are overriding an existing key => no need to allocated room
652          * in uCode. */
653
654         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
655                 "no space for a new key");
656
657         priv->stations[sta_id].sta.key.key_flags = key_flags;
658         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
659         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
660
661         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
662
663         spin_unlock_irqrestore(&priv->sta_lock, flags);
664
665         return ret;
666 }
667
668 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
669                                    struct ieee80211_key_conf *keyconf,
670                                    u8 sta_id)
671 {
672         unsigned long flags;
673         __le16 key_flags = 0;
674         int ret;
675
676         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
677         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
678         key_flags &= ~STA_KEY_FLG_INVALID;
679
680         if (sta_id == priv->hw_params.bcast_sta_id)
681                 key_flags |= STA_KEY_MULTICAST_MSK;
682
683         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
684
685         spin_lock_irqsave(&priv->sta_lock, flags);
686         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
687         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
688
689         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
690                keyconf->keylen);
691
692         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
693                keyconf->keylen);
694
695         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
696                         == STA_KEY_FLG_NO_ENC)
697                 priv->stations[sta_id].sta.key.key_offset =
698                                  iwl_get_free_ucode_key_index(priv);
699         /* else, we are overriding an existing key => no need to allocated room
700          * in uCode. */
701
702         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
703                 "no space for a new key");
704
705         priv->stations[sta_id].sta.key.key_flags = key_flags;
706         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
707         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
708
709         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
710
711         spin_unlock_irqrestore(&priv->sta_lock, flags);
712
713         return ret;
714 }
715
716 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
717                                    struct ieee80211_key_conf *keyconf,
718                                    u8 sta_id)
719 {
720         unsigned long flags;
721         int ret = 0;
722         __le16 key_flags = 0;
723
724         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
725         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
726         key_flags &= ~STA_KEY_FLG_INVALID;
727
728         if (sta_id == priv->hw_params.bcast_sta_id)
729                 key_flags |= STA_KEY_MULTICAST_MSK;
730
731         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
732         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
733
734         spin_lock_irqsave(&priv->sta_lock, flags);
735
736         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
737         priv->stations[sta_id].keyinfo.keylen = 16;
738
739         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
740                         == STA_KEY_FLG_NO_ENC)
741                 priv->stations[sta_id].sta.key.key_offset =
742                                  iwl_get_free_ucode_key_index(priv);
743         /* else, we are overriding an existing key => no need to allocated room
744          * in uCode. */
745
746         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
747                 "no space for a new key");
748
749         priv->stations[sta_id].sta.key.key_flags = key_flags;
750
751
752         /* This copy is acutally not needed: we get the key with each TX */
753         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
754
755         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
756
757         spin_unlock_irqrestore(&priv->sta_lock, flags);
758
759         return ret;
760 }
761
762 void iwl_update_tkip_key(struct iwl_priv *priv,
763                         struct ieee80211_key_conf *keyconf,
764                         const u8 *addr, u32 iv32, u16 *phase1key)
765 {
766         u8 sta_id = IWL_INVALID_STATION;
767         unsigned long flags;
768         int i;
769
770         sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
771         if (sta_id == IWL_INVALID_STATION) {
772                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
773                                    addr);
774                 return;
775         }
776
777         if (iwl_scan_cancel(priv)) {
778                 /* cancel scan failed, just live w/ bad key and rely
779                    briefly on SW decryption */
780                 return;
781         }
782
783         spin_lock_irqsave(&priv->sta_lock, flags);
784
785         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
786
787         for (i = 0; i < 5; i++)
788                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
789                         cpu_to_le16(phase1key[i]);
790
791         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
792         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
793
794         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
795
796         spin_unlock_irqrestore(&priv->sta_lock, flags);
797
798 }
799 EXPORT_SYMBOL(iwl_update_tkip_key);
800
801 int iwl_remove_dynamic_key(struct iwl_priv *priv,
802                                 struct ieee80211_key_conf *keyconf,
803                                 u8 sta_id)
804 {
805         unsigned long flags;
806         int ret = 0;
807         u16 key_flags;
808         u8 keyidx;
809
810         priv->key_mapping_key--;
811
812         spin_lock_irqsave(&priv->sta_lock, flags);
813         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
814         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
815
816         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
817                       keyconf->keyidx, sta_id);
818
819         if (keyconf->keyidx != keyidx) {
820                 /* We need to remove a key with index different that the one
821                  * in the uCode. This means that the key we need to remove has
822                  * been replaced by another one with different index.
823                  * Don't do anything and return ok
824                  */
825                 spin_unlock_irqrestore(&priv->sta_lock, flags);
826                 return 0;
827         }
828
829         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
830                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
831                             keyconf->keyidx, key_flags);
832                 spin_unlock_irqrestore(&priv->sta_lock, flags);
833                 return 0;
834         }
835
836         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
837                 &priv->ucode_key_table))
838                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
839                         priv->stations[sta_id].sta.key.key_offset);
840         memset(&priv->stations[sta_id].keyinfo, 0,
841                                         sizeof(struct iwl_hw_key));
842         memset(&priv->stations[sta_id].sta.key, 0,
843                                         sizeof(struct iwl4965_keyinfo));
844         priv->stations[sta_id].sta.key.key_flags =
845                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
846         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
847         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
848         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
849
850         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
851         spin_unlock_irqrestore(&priv->sta_lock, flags);
852         return ret;
853 }
854 EXPORT_SYMBOL(iwl_remove_dynamic_key);
855
856 int iwl_set_dynamic_key(struct iwl_priv *priv,
857                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
858 {
859         int ret;
860
861         priv->key_mapping_key++;
862         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
863
864         switch (keyconf->alg) {
865         case ALG_CCMP:
866                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
867                 break;
868         case ALG_TKIP:
869                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
870                 break;
871         case ALG_WEP:
872                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
873                 break;
874         default:
875                 IWL_ERR(priv,
876                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
877                 ret = -EINVAL;
878         }
879
880         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
881                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
882                       sta_id, ret);
883
884         return ret;
885 }
886 EXPORT_SYMBOL(iwl_set_dynamic_key);
887
888 #ifdef CONFIG_IWLWIFI_DEBUG
889 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
890                            struct iwl_link_quality_cmd *lq)
891 {
892         int i;
893         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
894         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
895                        lq->general_params.single_stream_ant_msk,
896                        lq->general_params.dual_stream_ant_msk);
897
898         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
899                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
900                                i, lq->rs_table[i].rate_n_flags);
901 }
902 #else
903 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
904                                    struct iwl_link_quality_cmd *lq)
905 {
906 }
907 #endif
908
909 int iwl_send_lq_cmd(struct iwl_priv *priv,
910                     struct iwl_link_quality_cmd *lq, u8 flags)
911 {
912         struct iwl_host_cmd cmd = {
913                 .id = REPLY_TX_LINK_QUALITY_CMD,
914                 .len = sizeof(struct iwl_link_quality_cmd),
915                 .meta.flags = flags,
916                 .data = lq,
917         };
918
919         if ((lq->sta_id == 0xFF) &&
920             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
921                 return -EINVAL;
922
923         if (lq->sta_id == 0xFF)
924                 lq->sta_id = IWL_AP_ID;
925
926         iwl_dump_lq_cmd(priv, lq);
927
928         if (iwl_is_associated(priv) && priv->assoc_station_added)
929                 return  iwl_send_cmd(priv, &cmd);
930
931         return 0;
932 }
933 EXPORT_SYMBOL(iwl_send_lq_cmd);
934
935 /**
936  * iwl_sta_init_lq - Initialize a station's hardware rate table
937  *
938  * The uCode's station table contains a table of fallback rates
939  * for automatic fallback during transmission.
940  *
941  * NOTE: This sets up a default set of values.  These will be replaced later
942  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
943  *       rc80211_simple.
944  *
945  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
946  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
947  *       which requires station table entry to exist).
948  */
949 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
950 {
951         int i, r;
952         struct iwl_link_quality_cmd link_cmd = {
953                 .reserved1 = 0,
954         };
955         u32 rate_flags;
956
957         /* Set up the rate scaling to start at selected rate, fall back
958          * all the way down to 1M in IEEE order, and then spin on 1M */
959         if (is_ap)
960                 r = IWL_RATE_54M_INDEX;
961         else if (priv->band == IEEE80211_BAND_5GHZ)
962                 r = IWL_RATE_6M_INDEX;
963         else
964                 r = IWL_RATE_1M_INDEX;
965
966         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
967                 rate_flags = 0;
968                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
969                         rate_flags |= RATE_MCS_CCK_MSK;
970
971                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
972                                 RATE_MCS_ANT_POS;
973
974                 link_cmd.rs_table[i].rate_n_flags =
975                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
976                 r = iwl_get_prev_ieee_rate(r);
977         }
978
979         link_cmd.general_params.single_stream_ant_msk =
980                                 first_antenna(priv->hw_params.valid_tx_ant);
981         link_cmd.general_params.dual_stream_ant_msk = 3;
982         link_cmd.agg_params.agg_dis_start_th = 3;
983         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
984
985         /* Update the rate scaling for control frame Tx to AP */
986         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
987
988         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
989                                sizeof(link_cmd), &link_cmd, NULL);
990 }
991
992 /**
993  * iwl_rxon_add_station - add station into station table.
994  *
995  * there is only one AP station with id= IWL_AP_ID
996  * NOTE: mutex must be held before calling this function
997  */
998 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
999 {
1000         struct ieee80211_sta *sta;
1001         struct ieee80211_sta_ht_cap ht_config;
1002         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
1003         u8 sta_id;
1004
1005         /* Add station to device's station table */
1006
1007         /*
1008          * XXX: This check is definitely not correct, if we're an AP
1009          *      it'll always be false which is not what we want, but
1010          *      it doesn't look like iwlagn is prepared to be an HT
1011          *      AP anyway.
1012          */
1013         if (priv->current_ht_config.is_ht) {
1014                 rcu_read_lock();
1015                 sta = ieee80211_find_sta(priv->hw, addr);
1016                 if (sta) {
1017                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1018                         cur_ht_config = &ht_config;
1019                 }
1020                 rcu_read_unlock();
1021         }
1022
1023         sta_id = priv->cfg->ops->smgmt->add_station(priv, addr, is_ap,
1024                                        0, cur_ht_config);
1025
1026         /* Set up default rate scaling table in device's station table */
1027         iwl_sta_init_lq(priv, addr, is_ap);
1028
1029         return sta_id;
1030 }
1031 EXPORT_SYMBOL(iwl_rxon_add_station);
1032
1033 /**
1034  * iwl_get_sta_id - Find station's index within station table
1035  *
1036  * If new IBSS station, create new entry in station table
1037  */
1038 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1039 {
1040         int sta_id;
1041         u16 fc = le16_to_cpu(hdr->frame_control);
1042
1043         /* If this frame is broadcast or management, use broadcast station id */
1044         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1045             is_multicast_ether_addr(hdr->addr1))
1046                 return priv->hw_params.bcast_sta_id;
1047
1048         switch (priv->iw_mode) {
1049
1050         /* If we are a client station in a BSS network, use the special
1051          * AP station entry (that's the only station we communicate with) */
1052         case NL80211_IFTYPE_STATION:
1053                 return IWL_AP_ID;
1054
1055         /* If we are an AP, then find the station, or use BCAST */
1056         case NL80211_IFTYPE_AP:
1057                 sta_id = priv->cfg->ops->smgmt->find_station(priv, hdr->addr1);
1058                 if (sta_id != IWL_INVALID_STATION)
1059                         return sta_id;
1060                 return priv->hw_params.bcast_sta_id;
1061
1062         /* If this frame is going out to an IBSS network, find the station,
1063          * or create a new station table entry */
1064         case NL80211_IFTYPE_ADHOC:
1065                 sta_id = priv->cfg->ops->smgmt->find_station(priv, hdr->addr1);
1066                 if (sta_id != IWL_INVALID_STATION)
1067                         return sta_id;
1068
1069                 /* Create new station table entry */
1070                 sta_id = priv->cfg->ops->smgmt->add_station(priv, hdr->addr1,
1071                                                    0, CMD_ASYNC, NULL);
1072
1073                 if (sta_id != IWL_INVALID_STATION)
1074                         return sta_id;
1075
1076                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1077                                "Defaulting to broadcast...\n",
1078                                hdr->addr1);
1079                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1080                 return priv->hw_params.bcast_sta_id;
1081
1082         default:
1083                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1084                         priv->iw_mode);
1085                 return priv->hw_params.bcast_sta_id;
1086         }
1087 }
1088 EXPORT_SYMBOL(iwl_get_sta_id);
1089
1090 /**
1091  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1092  */
1093 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1094 {
1095         unsigned long flags;
1096
1097         /* Remove "disable" flag, to enable Tx for this TID */
1098         spin_lock_irqsave(&priv->sta_lock, flags);
1099         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1100         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1101         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1102         spin_unlock_irqrestore(&priv->sta_lock, flags);
1103
1104         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1105 }
1106 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1107
1108 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1109                          const u8 *addr, int tid, u16 ssn)
1110 {
1111         unsigned long flags;
1112         int sta_id;
1113
1114         sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
1115         if (sta_id == IWL_INVALID_STATION)
1116                 return -ENXIO;
1117
1118         spin_lock_irqsave(&priv->sta_lock, flags);
1119         priv->stations[sta_id].sta.station_flags_msk = 0;
1120         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1121         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1122         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1123         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1124         spin_unlock_irqrestore(&priv->sta_lock, flags);
1125
1126         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1127                                         CMD_ASYNC);
1128 }
1129 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1130
1131 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1132 {
1133         unsigned long flags;
1134         int sta_id;
1135
1136         sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
1137         if (sta_id == IWL_INVALID_STATION) {
1138                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1139                 return -ENXIO;
1140         }
1141
1142         spin_lock_irqsave(&priv->sta_lock, flags);
1143         priv->stations[sta_id].sta.station_flags_msk = 0;
1144         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1145         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1146         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1147         spin_unlock_irqrestore(&priv->sta_lock, flags);
1148
1149         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1150                                         CMD_ASYNC);
1151 }
1152 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1153
1154 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1155 {
1156         unsigned long flags;
1157
1158         spin_lock_irqsave(&priv->sta_lock, flags);
1159         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1160         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1161         priv->stations[sta_id].sta.sta.modify_mask = 0;
1162         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1163         spin_unlock_irqrestore(&priv->sta_lock, flags);
1164
1165         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1166 }
1167
1168 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1169 {
1170         /* FIXME: need locking over ps_status ??? */
1171         u8 sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
1172
1173         if (sta_id != IWL_INVALID_STATION) {
1174                 u8 sta_awake = priv->stations[sta_id].
1175                                 ps_status == STA_PS_STATUS_WAKE;
1176
1177                 if (sta_awake && ps_bit)
1178                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1179                 else if (!sta_awake && !ps_bit) {
1180                         iwl_sta_modify_ps_wake(priv, sta_id);
1181                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1182                 }
1183         }
1184 }
1185