Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
[linux-2.6] / 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 iwl_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 = iwl_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
476         spin_lock_irqsave(&priv->sta_lock, flags);
477
478         if (iwl_is_alive(priv) &&
479            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
480            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
481                 IWL_ERR(priv, "Couldn't clear the station table\n");
482
483         priv->num_stations = 0;
484         memset(priv->stations, 0, sizeof(priv->stations));
485
486         /* clean ucode key table bit map */
487         priv->ucode_key_table = 0;
488
489         spin_unlock_irqrestore(&priv->sta_lock, flags);
490 }
491 EXPORT_SYMBOL(iwl_clear_stations_table);
492
493 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
494 {
495         int i;
496
497         for (i = 0; i < STA_KEY_MAX_NUM; i++)
498                 if (!test_and_set_bit(i, &priv->ucode_key_table))
499                         return i;
500
501         return WEP_INVALID_OFFSET;
502 }
503
504 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
505 {
506         int i, not_empty = 0;
507         u8 buff[sizeof(struct iwl_wep_cmd) +
508                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
509         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
510         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
511         struct iwl_host_cmd cmd = {
512                 .id = REPLY_WEPKEY,
513                 .data = wep_cmd,
514                 .meta.flags = CMD_ASYNC,
515         };
516
517         memset(wep_cmd, 0, cmd_size +
518                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
519
520         for (i = 0; i < WEP_KEYS_MAX ; i++) {
521                 wep_cmd->key[i].key_index = i;
522                 if (priv->wep_keys[i].key_size) {
523                         wep_cmd->key[i].key_offset = i;
524                         not_empty = 1;
525                 } else {
526                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
527                 }
528
529                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
530                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
531                                 priv->wep_keys[i].key_size);
532         }
533
534         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
535         wep_cmd->num_keys = WEP_KEYS_MAX;
536
537         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
538
539         cmd.len = cmd_size;
540
541         if (not_empty || send_if_empty)
542                 return iwl_send_cmd(priv, &cmd);
543         else
544                 return 0;
545 }
546 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
547
548 int iwl_remove_default_wep_key(struct iwl_priv *priv,
549                                struct ieee80211_key_conf *keyconf)
550 {
551         int ret;
552         unsigned long flags;
553
554         spin_lock_irqsave(&priv->sta_lock, flags);
555
556         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
557                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
558                           keyconf->keyidx);
559
560         priv->default_wep_key--;
561         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
562         ret = iwl_send_static_wepkey_cmd(priv, 1);
563         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
564                       keyconf->keyidx, ret);
565         spin_unlock_irqrestore(&priv->sta_lock, flags);
566
567         return ret;
568 }
569 EXPORT_SYMBOL(iwl_remove_default_wep_key);
570
571 int iwl_set_default_wep_key(struct iwl_priv *priv,
572                             struct ieee80211_key_conf *keyconf)
573 {
574         int ret;
575         unsigned long flags;
576
577         if (keyconf->keylen != WEP_KEY_LEN_128 &&
578             keyconf->keylen != WEP_KEY_LEN_64) {
579                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
580                 return -EINVAL;
581         }
582
583         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
584         keyconf->hw_key_idx = HW_KEY_DEFAULT;
585         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
586
587         spin_lock_irqsave(&priv->sta_lock, flags);
588         priv->default_wep_key++;
589
590         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
591                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
592                         keyconf->keyidx);
593
594         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
595         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
596                                                         keyconf->keylen);
597
598         ret = iwl_send_static_wepkey_cmd(priv, 0);
599         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
600                 keyconf->keylen, keyconf->keyidx, ret);
601         spin_unlock_irqrestore(&priv->sta_lock, flags);
602
603         return ret;
604 }
605 EXPORT_SYMBOL(iwl_set_default_wep_key);
606
607 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
608                                 struct ieee80211_key_conf *keyconf,
609                                 u8 sta_id)
610 {
611         unsigned long flags;
612         __le16 key_flags = 0;
613         int ret;
614
615         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
616
617         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
618         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
619         key_flags &= ~STA_KEY_FLG_INVALID;
620
621         if (keyconf->keylen == WEP_KEY_LEN_128)
622                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
623
624         if (sta_id == priv->hw_params.bcast_sta_id)
625                 key_flags |= STA_KEY_MULTICAST_MSK;
626
627         spin_lock_irqsave(&priv->sta_lock, flags);
628
629         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
630         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
631         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
632
633         memcpy(priv->stations[sta_id].keyinfo.key,
634                                 keyconf->key, keyconf->keylen);
635
636         memcpy(&priv->stations[sta_id].sta.key.key[3],
637                                 keyconf->key, keyconf->keylen);
638
639         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
640                         == STA_KEY_FLG_NO_ENC)
641                 priv->stations[sta_id].sta.key.key_offset =
642                                  iwl_get_free_ucode_key_index(priv);
643         /* else, we are overriding an existing key => no need to allocated room
644          * in uCode. */
645
646         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
647                 "no space for a new key");
648
649         priv->stations[sta_id].sta.key.key_flags = key_flags;
650         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
651         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
652
653         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
654
655         spin_unlock_irqrestore(&priv->sta_lock, flags);
656
657         return ret;
658 }
659
660 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
661                                    struct ieee80211_key_conf *keyconf,
662                                    u8 sta_id)
663 {
664         unsigned long flags;
665         __le16 key_flags = 0;
666         int ret;
667
668         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
669         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
670         key_flags &= ~STA_KEY_FLG_INVALID;
671
672         if (sta_id == priv->hw_params.bcast_sta_id)
673                 key_flags |= STA_KEY_MULTICAST_MSK;
674
675         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
676
677         spin_lock_irqsave(&priv->sta_lock, flags);
678         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
679         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
680
681         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
682                keyconf->keylen);
683
684         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
685                keyconf->keylen);
686
687         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
688                         == STA_KEY_FLG_NO_ENC)
689                 priv->stations[sta_id].sta.key.key_offset =
690                                  iwl_get_free_ucode_key_index(priv);
691         /* else, we are overriding an existing key => no need to allocated room
692          * in uCode. */
693
694         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
695                 "no space for a new key");
696
697         priv->stations[sta_id].sta.key.key_flags = key_flags;
698         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
699         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
700
701         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
702
703         spin_unlock_irqrestore(&priv->sta_lock, flags);
704
705         return ret;
706 }
707
708 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
709                                    struct ieee80211_key_conf *keyconf,
710                                    u8 sta_id)
711 {
712         unsigned long flags;
713         int ret = 0;
714
715         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
716         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
717
718         spin_lock_irqsave(&priv->sta_lock, flags);
719
720         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
721         priv->stations[sta_id].keyinfo.keylen = 16;
722
723         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
724                         == STA_KEY_FLG_NO_ENC)
725                 priv->stations[sta_id].sta.key.key_offset =
726                                  iwl_get_free_ucode_key_index(priv);
727         /* else, we are overriding an existing key => no need to allocated room
728          * in uCode. */
729
730         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
731                 "no space for a new key");
732
733         /* This copy is acutally not needed: we get the key with each TX */
734         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
735
736         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
737
738         spin_unlock_irqrestore(&priv->sta_lock, flags);
739
740         return ret;
741 }
742
743 void iwl_update_tkip_key(struct iwl_priv *priv,
744                         struct ieee80211_key_conf *keyconf,
745                         const u8 *addr, u32 iv32, u16 *phase1key)
746 {
747         u8 sta_id = IWL_INVALID_STATION;
748         unsigned long flags;
749         __le16 key_flags = 0;
750         int i;
751         DECLARE_MAC_BUF(mac);
752
753         sta_id = iwl_find_station(priv, addr);
754         if (sta_id == IWL_INVALID_STATION) {
755                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
756                                    addr);
757                 return;
758         }
759
760         if (iwl_scan_cancel(priv)) {
761                 /* cancel scan failed, just live w/ bad key and rely
762                    briefly on SW decryption */
763                 return;
764         }
765
766         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
767         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
768         key_flags &= ~STA_KEY_FLG_INVALID;
769
770         if (sta_id == priv->hw_params.bcast_sta_id)
771                 key_flags |= STA_KEY_MULTICAST_MSK;
772
773         spin_lock_irqsave(&priv->sta_lock, flags);
774
775         priv->stations[sta_id].sta.key.key_flags = key_flags;
776         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
777
778         for (i = 0; i < 5; i++)
779                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
780                         cpu_to_le16(phase1key[i]);
781
782         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
783         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
784
785         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
786
787         spin_unlock_irqrestore(&priv->sta_lock, flags);
788
789 }
790 EXPORT_SYMBOL(iwl_update_tkip_key);
791
792 int iwl_remove_dynamic_key(struct iwl_priv *priv,
793                                 struct ieee80211_key_conf *keyconf,
794                                 u8 sta_id)
795 {
796         unsigned long flags;
797         int ret = 0;
798         u16 key_flags;
799         u8 keyidx;
800
801         priv->key_mapping_key--;
802
803         spin_lock_irqsave(&priv->sta_lock, flags);
804         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
805         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
806
807         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
808                       keyconf->keyidx, sta_id);
809
810         if (keyconf->keyidx != keyidx) {
811                 /* We need to remove a key with index different that the one
812                  * in the uCode. This means that the key we need to remove has
813                  * been replaced by another one with different index.
814                  * Don't do anything and return ok
815                  */
816                 spin_unlock_irqrestore(&priv->sta_lock, flags);
817                 return 0;
818         }
819
820         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
821                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
822                             keyconf->keyidx, key_flags);
823                 spin_unlock_irqrestore(&priv->sta_lock, flags);
824                 return 0;
825         }
826
827         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
828                 &priv->ucode_key_table))
829                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
830                         priv->stations[sta_id].sta.key.key_offset);
831         memset(&priv->stations[sta_id].keyinfo, 0,
832                                         sizeof(struct iwl_hw_key));
833         memset(&priv->stations[sta_id].sta.key, 0,
834                                         sizeof(struct iwl4965_keyinfo));
835         priv->stations[sta_id].sta.key.key_flags =
836                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
837         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
838         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
839         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
840
841         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
842         spin_unlock_irqrestore(&priv->sta_lock, flags);
843         return ret;
844 }
845 EXPORT_SYMBOL(iwl_remove_dynamic_key);
846
847 int iwl_set_dynamic_key(struct iwl_priv *priv,
848                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
849 {
850         int ret;
851
852         priv->key_mapping_key++;
853         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
854
855         switch (keyconf->alg) {
856         case ALG_CCMP:
857                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
858                 break;
859         case ALG_TKIP:
860                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
861                 break;
862         case ALG_WEP:
863                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
864                 break;
865         default:
866                 IWL_ERR(priv,
867                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
868                 ret = -EINVAL;
869         }
870
871         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
872                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
873                       sta_id, ret);
874
875         return ret;
876 }
877 EXPORT_SYMBOL(iwl_set_dynamic_key);
878
879 #ifdef CONFIG_IWLWIFI_DEBUG
880 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
881                            struct iwl_link_quality_cmd *lq)
882 {
883         int i;
884         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
885         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
886                        lq->general_params.single_stream_ant_msk,
887                        lq->general_params.dual_stream_ant_msk);
888
889         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
890                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
891                                i, lq->rs_table[i].rate_n_flags);
892 }
893 #else
894 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
895                                    struct iwl_link_quality_cmd *lq)
896 {
897 }
898 #endif
899
900 int iwl_send_lq_cmd(struct iwl_priv *priv,
901                     struct iwl_link_quality_cmd *lq, u8 flags)
902 {
903         struct iwl_host_cmd cmd = {
904                 .id = REPLY_TX_LINK_QUALITY_CMD,
905                 .len = sizeof(struct iwl_link_quality_cmd),
906                 .meta.flags = flags,
907                 .data = lq,
908         };
909
910         if ((lq->sta_id == 0xFF) &&
911             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
912                 return -EINVAL;
913
914         if (lq->sta_id == 0xFF)
915                 lq->sta_id = IWL_AP_ID;
916
917         iwl_dump_lq_cmd(priv, lq);
918
919         if (iwl_is_associated(priv) && priv->assoc_station_added)
920                 return  iwl_send_cmd(priv, &cmd);
921
922         return 0;
923 }
924 EXPORT_SYMBOL(iwl_send_lq_cmd);
925
926 /**
927  * iwl_sta_init_lq - Initialize a station's hardware rate table
928  *
929  * The uCode's station table contains a table of fallback rates
930  * for automatic fallback during transmission.
931  *
932  * NOTE: This sets up a default set of values.  These will be replaced later
933  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
934  *       rc80211_simple.
935  *
936  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
937  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
938  *       which requires station table entry to exist).
939  */
940 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
941 {
942         int i, r;
943         struct iwl_link_quality_cmd link_cmd = {
944                 .reserved1 = 0,
945         };
946         u32 rate_flags;
947
948         /* Set up the rate scaling to start at selected rate, fall back
949          * all the way down to 1M in IEEE order, and then spin on 1M */
950         if (is_ap)
951                 r = IWL_RATE_54M_INDEX;
952         else if (priv->band == IEEE80211_BAND_5GHZ)
953                 r = IWL_RATE_6M_INDEX;
954         else
955                 r = IWL_RATE_1M_INDEX;
956
957         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
958                 rate_flags = 0;
959                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
960                         rate_flags |= RATE_MCS_CCK_MSK;
961
962                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
963                                 RATE_MCS_ANT_POS;
964
965                 link_cmd.rs_table[i].rate_n_flags =
966                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
967                 r = iwl_get_prev_ieee_rate(r);
968         }
969
970         link_cmd.general_params.single_stream_ant_msk =
971                                 first_antenna(priv->hw_params.valid_tx_ant);
972         link_cmd.general_params.dual_stream_ant_msk = 3;
973         link_cmd.agg_params.agg_dis_start_th = 3;
974         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
975
976         /* Update the rate scaling for control frame Tx to AP */
977         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
978
979         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
980                                sizeof(link_cmd), &link_cmd, NULL);
981 }
982
983 /**
984  * iwl_rxon_add_station - add station into station table.
985  *
986  * there is only one AP station with id= IWL_AP_ID
987  * NOTE: mutex must be held before calling this function
988  */
989 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
990 {
991         struct ieee80211_sta *sta;
992         struct ieee80211_sta_ht_cap ht_config;
993         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
994         u8 sta_id;
995
996         /* Add station to device's station table */
997
998         /*
999          * XXX: This check is definitely not correct, if we're an AP
1000          *      it'll always be false which is not what we want, but
1001          *      it doesn't look like iwlagn is prepared to be an HT
1002          *      AP anyway.
1003          */
1004         if (priv->current_ht_config.is_ht) {
1005                 rcu_read_lock();
1006                 sta = ieee80211_find_sta(priv->hw, addr);
1007                 if (sta) {
1008                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1009                         cur_ht_config = &ht_config;
1010                 }
1011                 rcu_read_unlock();
1012         }
1013
1014         sta_id = iwl_add_station_flags(priv, addr, is_ap,
1015                                        0, cur_ht_config);
1016
1017         /* Set up default rate scaling table in device's station table */
1018         iwl_sta_init_lq(priv, addr, is_ap);
1019
1020         return sta_id;
1021 }
1022 EXPORT_SYMBOL(iwl_rxon_add_station);
1023
1024 /**
1025  * iwl_get_sta_id - Find station's index within station table
1026  *
1027  * If new IBSS station, create new entry in station table
1028  */
1029 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1030 {
1031         int sta_id;
1032         u16 fc = le16_to_cpu(hdr->frame_control);
1033
1034         /* If this frame is broadcast or management, use broadcast station id */
1035         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1036             is_multicast_ether_addr(hdr->addr1))
1037                 return priv->hw_params.bcast_sta_id;
1038
1039         switch (priv->iw_mode) {
1040
1041         /* If we are a client station in a BSS network, use the special
1042          * AP station entry (that's the only station we communicate with) */
1043         case NL80211_IFTYPE_STATION:
1044                 return IWL_AP_ID;
1045
1046         /* If we are an AP, then find the station, or use BCAST */
1047         case NL80211_IFTYPE_AP:
1048                 sta_id = iwl_find_station(priv, hdr->addr1);
1049                 if (sta_id != IWL_INVALID_STATION)
1050                         return sta_id;
1051                 return priv->hw_params.bcast_sta_id;
1052
1053         /* If this frame is going out to an IBSS network, find the station,
1054          * or create a new station table entry */
1055         case NL80211_IFTYPE_ADHOC:
1056                 sta_id = iwl_find_station(priv, hdr->addr1);
1057                 if (sta_id != IWL_INVALID_STATION)
1058                         return sta_id;
1059
1060                 /* Create new station table entry */
1061                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
1062                                                    0, CMD_ASYNC, NULL);
1063
1064                 if (sta_id != IWL_INVALID_STATION)
1065                         return sta_id;
1066
1067                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1068                                "Defaulting to broadcast...\n",
1069                                hdr->addr1);
1070                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1071                 return priv->hw_params.bcast_sta_id;
1072
1073         /* If we are in monitor mode, use BCAST. This is required for
1074          * packet injection. */
1075         case NL80211_IFTYPE_MONITOR:
1076                 return priv->hw_params.bcast_sta_id;
1077
1078         default:
1079                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1080                         priv->iw_mode);
1081                 return priv->hw_params.bcast_sta_id;
1082         }
1083 }
1084 EXPORT_SYMBOL(iwl_get_sta_id);
1085
1086 /**
1087  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1088  */
1089 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1090 {
1091         unsigned long flags;
1092
1093         /* Remove "disable" flag, to enable Tx for this TID */
1094         spin_lock_irqsave(&priv->sta_lock, flags);
1095         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1096         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1097         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1098         spin_unlock_irqrestore(&priv->sta_lock, flags);
1099
1100         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1101 }
1102 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1103
1104 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1105                          const u8 *addr, int tid, u16 ssn)
1106 {
1107         unsigned long flags;
1108         int sta_id;
1109
1110         sta_id = iwl_find_station(priv, addr);
1111         if (sta_id == IWL_INVALID_STATION)
1112                 return -ENXIO;
1113
1114         spin_lock_irqsave(&priv->sta_lock, flags);
1115         priv->stations[sta_id].sta.station_flags_msk = 0;
1116         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1117         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1118         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1119         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1120         spin_unlock_irqrestore(&priv->sta_lock, flags);
1121
1122         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1123                                         CMD_ASYNC);
1124 }
1125 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1126
1127 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1128 {
1129         unsigned long flags;
1130         int sta_id;
1131
1132         sta_id = iwl_find_station(priv, addr);
1133         if (sta_id == IWL_INVALID_STATION)
1134                 return -ENXIO;
1135
1136         spin_lock_irqsave(&priv->sta_lock, flags);
1137         priv->stations[sta_id].sta.station_flags_msk = 0;
1138         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1139         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1140         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1141         spin_unlock_irqrestore(&priv->sta_lock, flags);
1142
1143         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1144                                         CMD_ASYNC);
1145 }
1146 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1147
1148 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1149 {
1150         unsigned long flags;
1151
1152         spin_lock_irqsave(&priv->sta_lock, flags);
1153         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1154         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1155         priv->stations[sta_id].sta.sta.modify_mask = 0;
1156         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1157         spin_unlock_irqrestore(&priv->sta_lock, flags);
1158
1159         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1160 }
1161
1162 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1163 {
1164         /* FIXME: need locking over ps_status ??? */
1165         u8 sta_id = iwl_find_station(priv, addr);
1166
1167         if (sta_id != IWL_INVALID_STATION) {
1168                 u8 sta_awake = priv->stations[sta_id].
1169                                 ps_status == STA_PS_STATUS_WAKE;
1170
1171                 if (sta_awake && ps_bit)
1172                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1173                 else if (!sta_awake && !ps_bit) {
1174                         iwl_sta_modify_ps_wake(priv, sta_id);
1175                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1176                 }
1177         }
1178 }
1179