Merge branch 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6] / drivers / net / wireless / iwlwifi / iwl-sta.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2008 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("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                 IWL_ERROR("ACTIVATE a non DRIVER active station %d\n", sta_id);
91
92         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
93         IWL_DEBUG_ASSOC("Added STA to Ucode: %pM\n",
94                         priv->stations[sta_id].sta.sta.addr);
95
96         spin_unlock_irqrestore(&priv->sta_lock, flags);
97 }
98
99 static int iwl_add_sta_callback(struct iwl_priv *priv,
100                                    struct iwl_cmd *cmd, struct sk_buff *skb)
101 {
102         struct iwl_rx_packet *res = NULL;
103         struct iwl_addsta_cmd *addsta =
104                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
105         u8 sta_id = addsta->sta.sta_id;
106
107         if (!skb) {
108                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
109                 return 1;
110         }
111
112         res = (struct iwl_rx_packet *)skb->data;
113         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
114                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
115                           res->hdr.flags);
116                 return 1;
117         }
118
119         switch (res->u.add_sta.status) {
120         case ADD_STA_SUCCESS_MSK:
121                 iwl_sta_ucode_activate(priv, sta_id);
122                  /* fall through */
123         default:
124                 IWL_DEBUG_HC("Received REPLY_ADD_STA:(0x%08X)\n",
125                              res->u.add_sta.status);
126                 break;
127         }
128
129         /* We didn't cache the SKB; let the caller free it */
130         return 1;
131 }
132
133 static int iwl_send_add_sta(struct iwl_priv *priv,
134                      struct iwl_addsta_cmd *sta, u8 flags)
135 {
136         struct iwl_rx_packet *res = NULL;
137         int ret = 0;
138         u8 data[sizeof(*sta)];
139         struct iwl_host_cmd cmd = {
140                 .id = REPLY_ADD_STA,
141                 .meta.flags = flags,
142                 .data = data,
143         };
144
145         if (flags & CMD_ASYNC)
146                 cmd.meta.u.callback = iwl_add_sta_callback;
147         else
148                 cmd.meta.flags |= CMD_WANT_SKB;
149
150         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
151         ret = iwl_send_cmd(priv, &cmd);
152
153         if (ret || (flags & CMD_ASYNC))
154                 return ret;
155
156         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
157         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
158                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
159                           res->hdr.flags);
160                 ret = -EIO;
161         }
162
163         if (ret == 0) {
164                 switch (res->u.add_sta.status) {
165                 case ADD_STA_SUCCESS_MSK:
166                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
167                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
168                         break;
169                 default:
170                         ret = -EIO;
171                         IWL_WARNING("REPLY_ADD_STA failed\n");
172                         break;
173                 }
174         }
175
176         priv->alloc_rxb_skb--;
177         dev_kfree_skb_any(cmd.meta.u.skb);
178
179         return ret;
180 }
181
182 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
183                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
184 {
185         __le32 sta_flags;
186         u8 mimo_ps_mode;
187
188         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
189                 goto done;
190
191         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
192
193         sta_flags = priv->stations[index].sta.station_flags;
194
195         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
196
197         switch (mimo_ps_mode) {
198         case WLAN_HT_CAP_SM_PS_STATIC:
199                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
200                 break;
201         case WLAN_HT_CAP_SM_PS_DYNAMIC:
202                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
203                 break;
204         case WLAN_HT_CAP_SM_PS_DISABLED:
205                 break;
206         default:
207                 IWL_WARNING("Invalid MIMO PS mode %d\n", mimo_ps_mode);
208                 break;
209         }
210
211         sta_flags |= cpu_to_le32(
212               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
213
214         sta_flags |= cpu_to_le32(
215               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
216
217         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
218                 sta_flags |= STA_FLG_FAT_EN_MSK;
219         else
220                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
221
222         priv->stations[index].sta.station_flags = sta_flags;
223  done:
224         return;
225 }
226
227 /**
228  * iwl_add_station_flags - Add station to tables in driver and device
229  */
230 u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
231                          u8 flags, struct ieee80211_sta_ht_cap *ht_info)
232 {
233         int i;
234         int sta_id = IWL_INVALID_STATION;
235         struct iwl_station_entry *station;
236         unsigned long flags_spin;
237
238         spin_lock_irqsave(&priv->sta_lock, flags_spin);
239         if (is_ap)
240                 sta_id = IWL_AP_ID;
241         else if (is_broadcast_ether_addr(addr))
242                 sta_id = priv->hw_params.bcast_sta_id;
243         else
244                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
245                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
246                                                 addr)) {
247                                 sta_id = i;
248                                 break;
249                         }
250
251                         if (!priv->stations[i].used &&
252                             sta_id == IWL_INVALID_STATION)
253                                 sta_id = i;
254                 }
255
256         /* These two conditions have the same outcome, but keep them separate
257            since they have different meanings */
258         if (unlikely(sta_id == IWL_INVALID_STATION)) {
259                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
260                 return sta_id;
261         }
262
263         if (priv->stations[sta_id].used &&
264             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
265                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
266                 return sta_id;
267         }
268
269
270         station = &priv->stations[sta_id];
271         station->used = IWL_STA_DRIVER_ACTIVE;
272         IWL_DEBUG_ASSOC("Add STA to driver ID %d: %pM\n",
273                         sta_id, addr);
274         priv->num_stations++;
275
276         /* Set up the REPLY_ADD_STA command to send to device */
277         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
278         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
279         station->sta.mode = 0;
280         station->sta.sta.sta_id = sta_id;
281         station->sta.station_flags = 0;
282
283         /* BCAST station and IBSS stations do not work in HT mode */
284         if (sta_id != priv->hw_params.bcast_sta_id &&
285             priv->iw_mode != NL80211_IFTYPE_ADHOC)
286                 iwl_set_ht_add_station(priv, sta_id, ht_info);
287
288         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
289
290         /* Add station to device's station table */
291         iwl_send_add_sta(priv, &station->sta, flags);
292         return sta_id;
293
294 }
295 EXPORT_SYMBOL(iwl_add_station_flags);
296
297 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
298 {
299         unsigned long flags;
300         u8 sta_id = iwl_find_station(priv, addr);
301
302         BUG_ON(sta_id == IWL_INVALID_STATION);
303
304         IWL_DEBUG_ASSOC("Removed STA from Ucode: %pM\n", addr);
305
306         spin_lock_irqsave(&priv->sta_lock, flags);
307
308         /* Ucode must be active and driver must be non active */
309         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
310                 IWL_ERROR("removed non active STA %d\n", sta_id);
311
312         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
313
314         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
315         spin_unlock_irqrestore(&priv->sta_lock, flags);
316 }
317
318 static int iwl_remove_sta_callback(struct iwl_priv *priv,
319                                    struct iwl_cmd *cmd, struct sk_buff *skb)
320 {
321         struct iwl_rx_packet *res = NULL;
322         struct iwl_rem_sta_cmd *rm_sta =
323                  (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
324         const char *addr = rm_sta->addr;
325
326         if (!skb) {
327                 IWL_ERROR("Error: Response NULL in REPLY_REMOVE_STA.\n");
328                 return 1;
329         }
330
331         res = (struct iwl_rx_packet *)skb->data;
332         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
333                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
334                 res->hdr.flags);
335                 return 1;
336         }
337
338         switch (res->u.rem_sta.status) {
339         case REM_STA_SUCCESS_MSK:
340                 iwl_sta_ucode_deactivate(priv, addr);
341                 break;
342         default:
343                 IWL_ERROR("REPLY_REMOVE_STA failed\n");
344                 break;
345         }
346
347         /* We didn't cache the SKB; let the caller free it */
348         return 1;
349 }
350
351 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
352                                    u8 flags)
353 {
354         struct iwl_rx_packet *res = NULL;
355         int ret;
356
357         struct iwl_rem_sta_cmd rm_sta_cmd;
358
359         struct iwl_host_cmd cmd = {
360                 .id = REPLY_REMOVE_STA,
361                 .len = sizeof(struct iwl_rem_sta_cmd),
362                 .meta.flags = flags,
363                 .data = &rm_sta_cmd,
364         };
365
366         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
367         rm_sta_cmd.num_sta = 1;
368         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
369
370         if (flags & CMD_ASYNC)
371                 cmd.meta.u.callback = iwl_remove_sta_callback;
372         else
373                 cmd.meta.flags |= CMD_WANT_SKB;
374         ret = iwl_send_cmd(priv, &cmd);
375
376         if (ret || (flags & CMD_ASYNC))
377                 return ret;
378
379         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
380         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
381                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
382                           res->hdr.flags);
383                 ret = -EIO;
384         }
385
386         if (!ret) {
387                 switch (res->u.rem_sta.status) {
388                 case REM_STA_SUCCESS_MSK:
389                         iwl_sta_ucode_deactivate(priv, addr);
390                         IWL_DEBUG_ASSOC("REPLY_REMOVE_STA PASSED\n");
391                         break;
392                 default:
393                         ret = -EIO;
394                         IWL_ERROR("REPLY_REMOVE_STA failed\n");
395                         break;
396                 }
397         }
398
399         priv->alloc_rxb_skb--;
400         dev_kfree_skb_any(cmd.meta.u.skb);
401
402         return ret;
403 }
404
405 /**
406  * iwl_remove_station - Remove driver's knowledge of station.
407  */
408 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
409 {
410         int sta_id = IWL_INVALID_STATION;
411         int i, ret = -EINVAL;
412         unsigned long flags;
413
414         spin_lock_irqsave(&priv->sta_lock, flags);
415
416         if (is_ap)
417                 sta_id = IWL_AP_ID;
418         else if (is_broadcast_ether_addr(addr))
419                 sta_id = priv->hw_params.bcast_sta_id;
420         else
421                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
422                         if (priv->stations[i].used &&
423                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
424                                                 addr)) {
425                                 sta_id = i;
426                                 break;
427                         }
428
429         if (unlikely(sta_id == IWL_INVALID_STATION))
430                 goto out;
431
432         IWL_DEBUG_ASSOC("Removing STA from driver:%d  %pM\n",
433                 sta_id, addr);
434
435         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
436                 IWL_ERROR("Removing %pM but non DRIVER active\n",
437                                 addr);
438                 goto out;
439         }
440
441         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
442                 IWL_ERROR("Removing %pM but non UCODE active\n",
443                                 addr);
444                 goto out;
445         }
446
447
448         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
449
450         priv->num_stations--;
451
452         BUG_ON(priv->num_stations < 0);
453
454         spin_unlock_irqrestore(&priv->sta_lock, flags);
455
456         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
457         return ret;
458 out:
459         spin_unlock_irqrestore(&priv->sta_lock, flags);
460         return ret;
461 }
462 EXPORT_SYMBOL(iwl_remove_station);
463
464 /**
465  * iwl_clear_stations_table - Clear the driver's station table
466  *
467  * NOTE:  This does not clear or otherwise alter the device's station table.
468  */
469 void iwl_clear_stations_table(struct iwl_priv *priv)
470 {
471         unsigned long flags;
472
473         spin_lock_irqsave(&priv->sta_lock, flags);
474
475         if (iwl_is_alive(priv) &&
476            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
477            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
478                 IWL_ERROR("Couldn't clear the station table\n");
479
480         priv->num_stations = 0;
481         memset(priv->stations, 0, sizeof(priv->stations));
482
483         spin_unlock_irqrestore(&priv->sta_lock, flags);
484 }
485 EXPORT_SYMBOL(iwl_clear_stations_table);
486
487 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
488 {
489         int i;
490
491         for (i = 0; i < STA_KEY_MAX_NUM; i++)
492                 if (!test_and_set_bit(i, &priv->ucode_key_table))
493                         return i;
494
495         return WEP_INVALID_OFFSET;
496 }
497
498 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
499 {
500         int i, not_empty = 0;
501         u8 buff[sizeof(struct iwl_wep_cmd) +
502                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
503         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
504         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
505         struct iwl_host_cmd cmd = {
506                 .id = REPLY_WEPKEY,
507                 .data = wep_cmd,
508                 .meta.flags = CMD_ASYNC,
509         };
510
511         memset(wep_cmd, 0, cmd_size +
512                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
513
514         for (i = 0; i < WEP_KEYS_MAX ; i++) {
515                 wep_cmd->key[i].key_index = i;
516                 if (priv->wep_keys[i].key_size) {
517                         wep_cmd->key[i].key_offset = i;
518                         not_empty = 1;
519                 } else {
520                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
521                 }
522
523                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
524                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
525                                 priv->wep_keys[i].key_size);
526         }
527
528         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
529         wep_cmd->num_keys = WEP_KEYS_MAX;
530
531         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
532
533         cmd.len = cmd_size;
534
535         if (not_empty || send_if_empty)
536                 return iwl_send_cmd(priv, &cmd);
537         else
538                 return 0;
539 }
540 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
541
542 int iwl_remove_default_wep_key(struct iwl_priv *priv,
543                                struct ieee80211_key_conf *keyconf)
544 {
545         int ret;
546         unsigned long flags;
547
548         spin_lock_irqsave(&priv->sta_lock, flags);
549
550         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
551                 IWL_ERROR("index %d not used in uCode key table.\n",
552                           keyconf->keyidx);
553
554         priv->default_wep_key--;
555         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
556         ret = iwl_send_static_wepkey_cmd(priv, 1);
557         IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
558                       keyconf->keyidx, ret);
559         spin_unlock_irqrestore(&priv->sta_lock, flags);
560
561         return ret;
562 }
563 EXPORT_SYMBOL(iwl_remove_default_wep_key);
564
565 int iwl_set_default_wep_key(struct iwl_priv *priv,
566                             struct ieee80211_key_conf *keyconf)
567 {
568         int ret;
569         unsigned long flags;
570
571         if (keyconf->keylen != WEP_KEY_LEN_128 &&
572             keyconf->keylen != WEP_KEY_LEN_64) {
573                 IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
574                 return -EINVAL;
575         }
576
577         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
578         keyconf->hw_key_idx = HW_KEY_DEFAULT;
579         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
580
581         spin_lock_irqsave(&priv->sta_lock, flags);
582         priv->default_wep_key++;
583
584         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
585                 IWL_ERROR("index %d already used in uCode key table.\n",
586                         keyconf->keyidx);
587
588         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
589         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
590                                                         keyconf->keylen);
591
592         ret = iwl_send_static_wepkey_cmd(priv, 0);
593         IWL_DEBUG_WEP("Set default WEP key: len=%d idx=%d ret=%d\n",
594                 keyconf->keylen, keyconf->keyidx, ret);
595         spin_unlock_irqrestore(&priv->sta_lock, flags);
596
597         return ret;
598 }
599 EXPORT_SYMBOL(iwl_set_default_wep_key);
600
601 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
602                                 struct ieee80211_key_conf *keyconf,
603                                 u8 sta_id)
604 {
605         unsigned long flags;
606         __le16 key_flags = 0;
607         int ret;
608
609         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
610
611         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
612         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
613         key_flags &= ~STA_KEY_FLG_INVALID;
614
615         if (keyconf->keylen == WEP_KEY_LEN_128)
616                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
617
618         if (sta_id == priv->hw_params.bcast_sta_id)
619                 key_flags |= STA_KEY_MULTICAST_MSK;
620
621         spin_lock_irqsave(&priv->sta_lock, flags);
622
623         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
624         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
625         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
626
627         memcpy(priv->stations[sta_id].keyinfo.key,
628                                 keyconf->key, keyconf->keylen);
629
630         memcpy(&priv->stations[sta_id].sta.key.key[3],
631                                 keyconf->key, keyconf->keylen);
632
633         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
634                         == STA_KEY_FLG_NO_ENC)
635                 priv->stations[sta_id].sta.key.key_offset =
636                                  iwl_get_free_ucode_key_index(priv);
637         /* else, we are overriding an existing key => no need to allocated room
638          * in uCode. */
639
640         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
641                 "no space for new kew");
642
643         priv->stations[sta_id].sta.key.key_flags = key_flags;
644         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
645         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
646
647         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
648
649         spin_unlock_irqrestore(&priv->sta_lock, flags);
650
651         return ret;
652 }
653
654 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
655                                    struct ieee80211_key_conf *keyconf,
656                                    u8 sta_id)
657 {
658         unsigned long flags;
659         __le16 key_flags = 0;
660         int ret;
661
662         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
663         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
664         key_flags &= ~STA_KEY_FLG_INVALID;
665
666         if (sta_id == priv->hw_params.bcast_sta_id)
667                 key_flags |= STA_KEY_MULTICAST_MSK;
668
669         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
670
671         spin_lock_irqsave(&priv->sta_lock, flags);
672         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
673         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
674
675         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
676                keyconf->keylen);
677
678         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
679                keyconf->keylen);
680
681         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
682                         == STA_KEY_FLG_NO_ENC)
683                 priv->stations[sta_id].sta.key.key_offset =
684                                  iwl_get_free_ucode_key_index(priv);
685         /* else, we are overriding an existing key => no need to allocated room
686          * in uCode. */
687
688         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
689                 "no space for new kew");
690
691         priv->stations[sta_id].sta.key.key_flags = key_flags;
692         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
693         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
694
695         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
696
697         spin_unlock_irqrestore(&priv->sta_lock, flags);
698
699         return ret;
700 }
701
702 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
703                                    struct ieee80211_key_conf *keyconf,
704                                    u8 sta_id)
705 {
706         unsigned long flags;
707         int ret = 0;
708
709         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
710         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
711
712         spin_lock_irqsave(&priv->sta_lock, flags);
713
714         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
715         priv->stations[sta_id].keyinfo.keylen = 16;
716
717         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
718                         == STA_KEY_FLG_NO_ENC)
719                 priv->stations[sta_id].sta.key.key_offset =
720                                  iwl_get_free_ucode_key_index(priv);
721         /* else, we are overriding an existing key => no need to allocated room
722          * in uCode. */
723
724         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
725                 "no space for new kew");
726
727         /* This copy is acutally not needed: we get the key with each TX */
728         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
729
730         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
731
732         spin_unlock_irqrestore(&priv->sta_lock, flags);
733
734         return ret;
735 }
736
737 void iwl_update_tkip_key(struct iwl_priv *priv,
738                         struct ieee80211_key_conf *keyconf,
739                         const u8 *addr, u32 iv32, u16 *phase1key)
740 {
741         u8 sta_id = IWL_INVALID_STATION;
742         unsigned long flags;
743         __le16 key_flags = 0;
744         int i;
745         DECLARE_MAC_BUF(mac);
746
747         sta_id = iwl_find_station(priv, addr);
748         if (sta_id == IWL_INVALID_STATION) {
749                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
750                                    addr);
751                 return;
752         }
753
754         if (iwl_scan_cancel(priv)) {
755                 /* cancel scan failed, just live w/ bad key and rely
756                    briefly on SW decryption */
757                 return;
758         }
759
760         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
761         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
762         key_flags &= ~STA_KEY_FLG_INVALID;
763
764         if (sta_id == priv->hw_params.bcast_sta_id)
765                 key_flags |= STA_KEY_MULTICAST_MSK;
766
767         spin_lock_irqsave(&priv->sta_lock, flags);
768
769         priv->stations[sta_id].sta.key.key_flags = key_flags;
770         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
771
772         for (i = 0; i < 5; i++)
773                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
774                         cpu_to_le16(phase1key[i]);
775
776         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
777         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
778
779         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
780
781         spin_unlock_irqrestore(&priv->sta_lock, flags);
782
783 }
784 EXPORT_SYMBOL(iwl_update_tkip_key);
785
786 int iwl_remove_dynamic_key(struct iwl_priv *priv,
787                                 struct ieee80211_key_conf *keyconf,
788                                 u8 sta_id)
789 {
790         unsigned long flags;
791         int ret = 0;
792         u16 key_flags;
793         u8 keyidx;
794
795         priv->key_mapping_key--;
796
797         spin_lock_irqsave(&priv->sta_lock, flags);
798         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
799         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
800
801         IWL_DEBUG_WEP("Remove dynamic key: idx=%d sta=%d\n",
802                       keyconf->keyidx, sta_id);
803
804         if (keyconf->keyidx != keyidx) {
805                 /* We need to remove a key with index different that the one
806                  * in the uCode. This means that the key we need to remove has
807                  * been replaced by another one with different index.
808                  * Don't do anything and return ok
809                  */
810                 spin_unlock_irqrestore(&priv->sta_lock, flags);
811                 return 0;
812         }
813
814         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
815                 IWL_WARNING("Removing wrong key %d 0x%x\n",
816                             keyconf->keyidx, key_flags);
817                 spin_unlock_irqrestore(&priv->sta_lock, flags);
818                 return 0;
819         }
820
821         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
822                 &priv->ucode_key_table))
823                 IWL_ERROR("index %d not used in uCode key table.\n",
824                         priv->stations[sta_id].sta.key.key_offset);
825         memset(&priv->stations[sta_id].keyinfo, 0,
826                                         sizeof(struct iwl_hw_key));
827         memset(&priv->stations[sta_id].sta.key, 0,
828                                         sizeof(struct iwl4965_keyinfo));
829         priv->stations[sta_id].sta.key.key_flags =
830                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
831         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
832         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
833         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
834
835         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
836         spin_unlock_irqrestore(&priv->sta_lock, flags);
837         return ret;
838 }
839 EXPORT_SYMBOL(iwl_remove_dynamic_key);
840
841 int iwl_set_dynamic_key(struct iwl_priv *priv,
842                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
843 {
844         int ret;
845
846         priv->key_mapping_key++;
847         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
848
849         switch (keyconf->alg) {
850         case ALG_CCMP:
851                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
852                 break;
853         case ALG_TKIP:
854                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
855                 break;
856         case ALG_WEP:
857                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
858                 break;
859         default:
860                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
861                 ret = -EINVAL;
862         }
863
864         IWL_DEBUG_WEP("Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
865                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
866                       sta_id, ret);
867
868         return ret;
869 }
870 EXPORT_SYMBOL(iwl_set_dynamic_key);
871
872 #ifdef CONFIG_IWLWIFI_DEBUG
873 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
874                            struct iwl_link_quality_cmd *lq)
875 {
876         int i;
877         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
878         IWL_DEBUG_RATE("lq ant 0x%X 0x%X\n",
879                        lq->general_params.single_stream_ant_msk,
880                        lq->general_params.dual_stream_ant_msk);
881
882         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
883                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
884                                i, lq->rs_table[i].rate_n_flags);
885 }
886 #else
887 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
888                                    struct iwl_link_quality_cmd *lq)
889 {
890 }
891 #endif
892
893 int iwl_send_lq_cmd(struct iwl_priv *priv,
894                     struct iwl_link_quality_cmd *lq, u8 flags)
895 {
896         struct iwl_host_cmd cmd = {
897                 .id = REPLY_TX_LINK_QUALITY_CMD,
898                 .len = sizeof(struct iwl_link_quality_cmd),
899                 .meta.flags = flags,
900                 .data = lq,
901         };
902
903         if ((lq->sta_id == 0xFF) &&
904             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
905                 return -EINVAL;
906
907         if (lq->sta_id == 0xFF)
908                 lq->sta_id = IWL_AP_ID;
909
910         iwl_dump_lq_cmd(priv, lq);
911
912         if (iwl_is_associated(priv) && priv->assoc_station_added)
913                 return  iwl_send_cmd(priv, &cmd);
914
915         return 0;
916 }
917 EXPORT_SYMBOL(iwl_send_lq_cmd);
918
919 /**
920  * iwl_sta_init_lq - Initialize a station's hardware rate table
921  *
922  * The uCode's station table contains a table of fallback rates
923  * for automatic fallback during transmission.
924  *
925  * NOTE: This sets up a default set of values.  These will be replaced later
926  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
927  *       rc80211_simple.
928  *
929  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
930  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
931  *       which requires station table entry to exist).
932  */
933 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
934 {
935         int i, r;
936         struct iwl_link_quality_cmd link_cmd = {
937                 .reserved1 = 0,
938         };
939         u32 rate_flags;
940
941         /* Set up the rate scaling to start at selected rate, fall back
942          * all the way down to 1M in IEEE order, and then spin on 1M */
943         if (is_ap)
944                 r = IWL_RATE_54M_INDEX;
945         else if (priv->band == IEEE80211_BAND_5GHZ)
946                 r = IWL_RATE_6M_INDEX;
947         else
948                 r = IWL_RATE_1M_INDEX;
949
950         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
951                 rate_flags = 0;
952                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
953                         rate_flags |= RATE_MCS_CCK_MSK;
954
955                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
956                                 RATE_MCS_ANT_POS;
957
958                 link_cmd.rs_table[i].rate_n_flags =
959                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
960                 r = iwl_get_prev_ieee_rate(r);
961         }
962
963         link_cmd.general_params.single_stream_ant_msk =
964                                 first_antenna(priv->hw_params.valid_tx_ant);
965         link_cmd.general_params.dual_stream_ant_msk = 3;
966         link_cmd.agg_params.agg_dis_start_th = 3;
967         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
968
969         /* Update the rate scaling for control frame Tx to AP */
970         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
971
972         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
973                                sizeof(link_cmd), &link_cmd, NULL);
974 }
975
976 /**
977  * iwl_rxon_add_station - add station into station table.
978  *
979  * there is only one AP station with id= IWL_AP_ID
980  * NOTE: mutex must be held before calling this function
981  */
982 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
983 {
984         struct ieee80211_sta *sta;
985         struct ieee80211_sta_ht_cap ht_config;
986         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
987         u8 sta_id;
988
989         /* Add station to device's station table */
990
991         /*
992          * XXX: This check is definitely not correct, if we're an AP
993          *      it'll always be false which is not what we want, but
994          *      it doesn't look like iwlagn is prepared to be an HT
995          *      AP anyway.
996          */
997         if (priv->current_ht_config.is_ht) {
998                 rcu_read_lock();
999                 sta = ieee80211_find_sta(priv->hw, addr);
1000                 if (sta) {
1001                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1002                         cur_ht_config = &ht_config;
1003                 }
1004                 rcu_read_unlock();
1005         }
1006
1007         sta_id = iwl_add_station_flags(priv, addr, is_ap,
1008                                        0, cur_ht_config);
1009
1010         /* Set up default rate scaling table in device's station table */
1011         iwl_sta_init_lq(priv, addr, is_ap);
1012
1013         return sta_id;
1014 }
1015 EXPORT_SYMBOL(iwl_rxon_add_station);
1016
1017 /**
1018  * iwl_get_sta_id - Find station's index within station table
1019  *
1020  * If new IBSS station, create new entry in station table
1021  */
1022 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1023 {
1024         int sta_id;
1025         u16 fc = le16_to_cpu(hdr->frame_control);
1026
1027         /* If this frame is broadcast or management, use broadcast station id */
1028         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1029             is_multicast_ether_addr(hdr->addr1))
1030                 return priv->hw_params.bcast_sta_id;
1031
1032         switch (priv->iw_mode) {
1033
1034         /* If we are a client station in a BSS network, use the special
1035          * AP station entry (that's the only station we communicate with) */
1036         case NL80211_IFTYPE_STATION:
1037                 return IWL_AP_ID;
1038
1039         /* If we are an AP, then find the station, or use BCAST */
1040         case NL80211_IFTYPE_AP:
1041                 sta_id = iwl_find_station(priv, hdr->addr1);
1042                 if (sta_id != IWL_INVALID_STATION)
1043                         return sta_id;
1044                 return priv->hw_params.bcast_sta_id;
1045
1046         /* If this frame is going out to an IBSS network, find the station,
1047          * or create a new station table entry */
1048         case NL80211_IFTYPE_ADHOC:
1049                 sta_id = iwl_find_station(priv, hdr->addr1);
1050                 if (sta_id != IWL_INVALID_STATION)
1051                         return sta_id;
1052
1053                 /* Create new station table entry */
1054                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
1055                                                    0, CMD_ASYNC, NULL);
1056
1057                 if (sta_id != IWL_INVALID_STATION)
1058                         return sta_id;
1059
1060                 IWL_DEBUG_DROP("Station %pM not in station map. "
1061                                "Defaulting to broadcast...\n",
1062                                hdr->addr1);
1063                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1064                 return priv->hw_params.bcast_sta_id;
1065
1066         /* If we are in monitor mode, use BCAST. This is required for
1067          * packet injection. */
1068         case NL80211_IFTYPE_MONITOR:
1069                 return priv->hw_params.bcast_sta_id;
1070
1071         default:
1072                 IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
1073                 return priv->hw_params.bcast_sta_id;
1074         }
1075 }
1076 EXPORT_SYMBOL(iwl_get_sta_id);
1077
1078 /**
1079  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1080  */
1081 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1082 {
1083         unsigned long flags;
1084
1085         /* Remove "disable" flag, to enable Tx for this TID */
1086         spin_lock_irqsave(&priv->sta_lock, flags);
1087         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1088         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1089         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1090         spin_unlock_irqrestore(&priv->sta_lock, flags);
1091
1092         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1093 }
1094 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1095
1096 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1097                          const u8 *addr, int tid, u16 ssn)
1098 {
1099         unsigned long flags;
1100         int sta_id;
1101
1102         sta_id = iwl_find_station(priv, addr);
1103         if (sta_id == IWL_INVALID_STATION)
1104                 return -ENXIO;
1105
1106         spin_lock_irqsave(&priv->sta_lock, flags);
1107         priv->stations[sta_id].sta.station_flags_msk = 0;
1108         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1109         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1110         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1111         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1112         spin_unlock_irqrestore(&priv->sta_lock, flags);
1113
1114         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1115                                         CMD_ASYNC);
1116 }
1117 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1118
1119 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1120 {
1121         unsigned long flags;
1122         int sta_id;
1123
1124         sta_id = iwl_find_station(priv, addr);
1125         if (sta_id == IWL_INVALID_STATION)
1126                 return -ENXIO;
1127
1128         spin_lock_irqsave(&priv->sta_lock, flags);
1129         priv->stations[sta_id].sta.station_flags_msk = 0;
1130         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1131         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1132         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1133         spin_unlock_irqrestore(&priv->sta_lock, flags);
1134
1135         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1136                                         CMD_ASYNC);
1137 }
1138 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1139
1140 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1141 {
1142         unsigned long flags;
1143
1144         spin_lock_irqsave(&priv->sta_lock, flags);
1145         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1146         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1147         priv->stations[sta_id].sta.sta.modify_mask = 0;
1148         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1149         spin_unlock_irqrestore(&priv->sta_lock, flags);
1150
1151         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1152 }
1153
1154 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1155 {
1156         /* FIXME: need locking over ps_status ??? */
1157         u8 sta_id = iwl_find_station(priv, addr);
1158
1159         if (sta_id != IWL_INVALID_STATION) {
1160                 u8 sta_awake = priv->stations[sta_id].
1161                                 ps_status == STA_PS_STATUS_WAKE;
1162
1163                 if (sta_awake && ps_bit)
1164                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1165                 else if (!sta_awake && !ps_bit) {
1166                         iwl_sta_modify_ps_wake(priv, sta_id);
1167                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1168                 }
1169         }
1170 }
1171