iwlwifi: use paged Rx
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl-sta.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
4  *
5  * Portions of this file are derived from the ipw3945 project, as well
6  * as portions of the ieee80211 subsystem header files.
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of version 2 of the GNU General Public License as
10  * published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along with
18  * this program; if not, write to the Free Software Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20  *
21  * The full GNU General Public License is included in this distribution in the
22  * file called LICENSE.
23  *
24  * Contact Information:
25  *  Intel Linux Wireless <ilw@linux.intel.com>
26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27  *
28  *****************************************************************************/
29
30 #include <net/mac80211.h>
31 #include <linux/etherdevice.h>
32
33 #include "iwl-dev.h"
34 #include "iwl-core.h"
35 #include "iwl-sta.h"
36
37 #define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
38 #define IWL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
39
40 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
41 {
42         int i;
43         int start = 0;
44         int ret = IWL_INVALID_STATION;
45         unsigned long flags;
46
47         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
48             (priv->iw_mode == NL80211_IFTYPE_AP))
49                 start = IWL_STA_ID;
50
51         if (is_broadcast_ether_addr(addr))
52                 return priv->hw_params.bcast_sta_id;
53
54         spin_lock_irqsave(&priv->sta_lock, flags);
55         for (i = start; i < priv->hw_params.max_stations; i++)
56                 if (priv->stations[i].used &&
57                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
58                                          addr))) {
59                         ret = i;
60                         goto out;
61                 }
62
63         IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
64                               addr, priv->num_stations);
65
66  out:
67         spin_unlock_irqrestore(&priv->sta_lock, flags);
68         return ret;
69 }
70 EXPORT_SYMBOL(iwl_find_station);
71
72 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
73 {
74         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
75                 return IWL_AP_ID;
76         } else {
77                 u8 *da = ieee80211_get_DA(hdr);
78                 return 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_ERR(priv, "ACTIVATE a non DRIVER active station %d\n",
91                         sta_id);
92
93         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
94         IWL_DEBUG_ASSOC(priv, "Added STA to Ucode: %pM\n",
95                         priv->stations[sta_id].sta.sta.addr);
96
97         spin_unlock_irqrestore(&priv->sta_lock, flags);
98 }
99
100 static void iwl_add_sta_callback(struct iwl_priv *priv,
101                                  struct iwl_device_cmd *cmd,
102                                  struct iwl_rx_packet *pkt)
103 {
104         struct iwl_addsta_cmd *addsta =
105                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
106         u8 sta_id = addsta->sta.sta_id;
107
108         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
109                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
110                           pkt->hdr.flags);
111                 return;
112         }
113
114         switch (pkt->u.add_sta.status) {
115         case ADD_STA_SUCCESS_MSK:
116                 iwl_sta_ucode_activate(priv, sta_id);
117                  /* fall through */
118         default:
119                 IWL_DEBUG_HC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
120                              pkt->u.add_sta.status);
121                 break;
122         }
123 }
124
125 int iwl_send_add_sta(struct iwl_priv *priv,
126                      struct iwl_addsta_cmd *sta, u8 flags)
127 {
128         struct iwl_rx_packet *pkt = NULL;
129         int ret = 0;
130         u8 data[sizeof(*sta)];
131         struct iwl_host_cmd cmd = {
132                 .id = REPLY_ADD_STA,
133                 .flags = flags,
134                 .data = data,
135         };
136
137         if (flags & CMD_ASYNC)
138                 cmd.callback = iwl_add_sta_callback;
139         else
140                 cmd.flags |= CMD_WANT_SKB;
141
142         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
143         ret = iwl_send_cmd(priv, &cmd);
144
145         if (ret || (flags & CMD_ASYNC))
146                 return ret;
147
148         pkt = (struct iwl_rx_packet *)cmd.reply_page;
149         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
150                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
151                           pkt->hdr.flags);
152                 ret = -EIO;
153         }
154
155         if (ret == 0) {
156                 switch (pkt->u.add_sta.status) {
157                 case ADD_STA_SUCCESS_MSK:
158                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
159                         IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
160                         break;
161                 default:
162                         ret = -EIO;
163                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
164                         break;
165                 }
166         }
167
168         priv->alloc_rxb_page--;
169         free_pages(cmd.reply_page, priv->hw_params.rx_page_order);
170
171         return ret;
172 }
173 EXPORT_SYMBOL(iwl_send_add_sta);
174
175 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
176                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
177 {
178         __le32 sta_flags;
179         u8 mimo_ps_mode;
180
181         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
182                 goto done;
183
184         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
185
186         sta_flags = priv->stations[index].sta.station_flags;
187
188         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
189
190         switch (mimo_ps_mode) {
191         case WLAN_HT_CAP_SM_PS_STATIC:
192                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
193                 break;
194         case WLAN_HT_CAP_SM_PS_DYNAMIC:
195                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
196                 break;
197         case WLAN_HT_CAP_SM_PS_DISABLED:
198                 break;
199         default:
200                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
201                 break;
202         }
203
204         sta_flags |= cpu_to_le32(
205               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
206
207         sta_flags |= cpu_to_le32(
208               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
209
210         if (iwl_is_ht40_tx_allowed(priv, sta_ht_inf))
211                 sta_flags |= STA_FLG_HT40_EN_MSK;
212         else
213                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
214
215         priv->stations[index].sta.station_flags = sta_flags;
216  done:
217         return;
218 }
219
220 /**
221  * iwl_add_station - Add station to tables in driver and device
222  */
223 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap, u8 flags,
224                 struct ieee80211_sta_ht_cap *ht_info)
225 {
226         struct iwl_station_entry *station;
227         unsigned long flags_spin;
228         int i;
229         int sta_id = IWL_INVALID_STATION;
230         u16 rate;
231
232         spin_lock_irqsave(&priv->sta_lock, flags_spin);
233         if (is_ap)
234                 sta_id = IWL_AP_ID;
235         else if (is_broadcast_ether_addr(addr))
236                 sta_id = priv->hw_params.bcast_sta_id;
237         else
238                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
239                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
240                                                 addr)) {
241                                 sta_id = i;
242                                 break;
243                         }
244
245                         if (!priv->stations[i].used &&
246                             sta_id == IWL_INVALID_STATION)
247                                 sta_id = i;
248                 }
249
250         /* These two conditions have the same outcome, but keep them separate
251            since they have different meanings */
252         if (unlikely(sta_id == IWL_INVALID_STATION)) {
253                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
254                 return sta_id;
255         }
256
257         if (priv->stations[sta_id].used &&
258             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
259                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
260                 return sta_id;
261         }
262
263
264         station = &priv->stations[sta_id];
265         station->used = IWL_STA_DRIVER_ACTIVE;
266         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
267                         sta_id, addr);
268         priv->num_stations++;
269
270         /* Set up the REPLY_ADD_STA command to send to device */
271         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
272         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
273         station->sta.mode = 0;
274         station->sta.sta.sta_id = sta_id;
275         station->sta.station_flags = 0;
276
277         /* BCAST station and IBSS stations do not work in HT mode */
278         if (sta_id != priv->hw_params.bcast_sta_id &&
279             priv->iw_mode != NL80211_IFTYPE_ADHOC)
280                 iwl_set_ht_add_station(priv, sta_id, ht_info);
281
282         /* 3945 only */
283         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
284                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
285         /* Turn on both antennas for the station... */
286         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
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);
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(priv, "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_ERR(priv, "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 void iwl_remove_sta_callback(struct iwl_priv *priv,
319                                     struct iwl_device_cmd *cmd,
320                                     struct iwl_rx_packet *pkt)
321 {
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 (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
327                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
328                 pkt->hdr.flags);
329                 return;
330         }
331
332         switch (pkt->u.rem_sta.status) {
333         case REM_STA_SUCCESS_MSK:
334                 iwl_sta_ucode_deactivate(priv, addr);
335                 break;
336         default:
337                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
338                 break;
339         }
340 }
341
342 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
343                                    u8 flags)
344 {
345         struct iwl_rx_packet *pkt;
346         int ret;
347
348         struct iwl_rem_sta_cmd rm_sta_cmd;
349
350         struct iwl_host_cmd cmd = {
351                 .id = REPLY_REMOVE_STA,
352                 .len = sizeof(struct iwl_rem_sta_cmd),
353                 .flags = flags,
354                 .data = &rm_sta_cmd,
355         };
356
357         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
358         rm_sta_cmd.num_sta = 1;
359         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
360
361         if (flags & CMD_ASYNC)
362                 cmd.callback = iwl_remove_sta_callback;
363         else
364                 cmd.flags |= CMD_WANT_SKB;
365         ret = iwl_send_cmd(priv, &cmd);
366
367         if (ret || (flags & CMD_ASYNC))
368                 return ret;
369
370         pkt = (struct iwl_rx_packet *)cmd.reply_page;
371         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
372                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
373                           pkt->hdr.flags);
374                 ret = -EIO;
375         }
376
377         if (!ret) {
378                 switch (pkt->u.rem_sta.status) {
379                 case REM_STA_SUCCESS_MSK:
380                         iwl_sta_ucode_deactivate(priv, addr);
381                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
382                         break;
383                 default:
384                         ret = -EIO;
385                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
386                         break;
387                 }
388         }
389
390         priv->alloc_rxb_page--;
391         free_pages(cmd.reply_page, priv->hw_params.rx_page_order);
392
393         return ret;
394 }
395
396 /**
397  * iwl_remove_station - Remove driver's knowledge of station.
398  */
399 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
400 {
401         int sta_id = IWL_INVALID_STATION;
402         int i, ret = -EINVAL;
403         unsigned long flags;
404
405         spin_lock_irqsave(&priv->sta_lock, flags);
406
407         if (is_ap)
408                 sta_id = IWL_AP_ID;
409         else if (is_broadcast_ether_addr(addr))
410                 sta_id = priv->hw_params.bcast_sta_id;
411         else
412                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
413                         if (priv->stations[i].used &&
414                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
415                                                 addr)) {
416                                 sta_id = i;
417                                 break;
418                         }
419
420         if (unlikely(sta_id == IWL_INVALID_STATION))
421                 goto out;
422
423         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
424                 sta_id, addr);
425
426         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
427                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
428                                 addr);
429                 goto out;
430         }
431
432         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
433                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
434                                 addr);
435                 goto out;
436         }
437
438
439         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
440
441         priv->num_stations--;
442
443         BUG_ON(priv->num_stations < 0);
444
445         spin_unlock_irqrestore(&priv->sta_lock, flags);
446
447         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
448         return ret;
449 out:
450         spin_unlock_irqrestore(&priv->sta_lock, flags);
451         return ret;
452 }
453
454 /**
455  * iwl_clear_stations_table - Clear the driver's station table
456  *
457  * NOTE:  This does not clear or otherwise alter the device's station table.
458  */
459 void iwl_clear_stations_table(struct iwl_priv *priv)
460 {
461         unsigned long flags;
462         int i;
463
464         spin_lock_irqsave(&priv->sta_lock, flags);
465
466         if (iwl_is_alive(priv) &&
467            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
468            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
469                 IWL_ERR(priv, "Couldn't clear the station table\n");
470
471         priv->num_stations = 0;
472         memset(priv->stations, 0, sizeof(priv->stations));
473
474         /* clean ucode key table bit map */
475         priv->ucode_key_table = 0;
476
477         /* keep track of static keys */
478         for (i = 0; i < WEP_KEYS_MAX ; i++) {
479                 if (priv->wep_keys[i].key_size)
480                         set_bit(i, &priv->ucode_key_table);
481         }
482
483         spin_unlock_irqrestore(&priv->sta_lock, flags);
484 }
485 EXPORT_SYMBOL(iwl_clear_stations_table);
486
487 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 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
498
499 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
500 {
501         int i, not_empty = 0;
502         u8 buff[sizeof(struct iwl_wep_cmd) +
503                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
504         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
505         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
506         struct iwl_host_cmd cmd = {
507                 .id = REPLY_WEPKEY,
508                 .data = wep_cmd,
509                 .flags = CMD_ASYNC,
510         };
511
512         memset(wep_cmd, 0, cmd_size +
513                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
514
515         for (i = 0; i < WEP_KEYS_MAX ; i++) {
516                 wep_cmd->key[i].key_index = i;
517                 if (priv->wep_keys[i].key_size) {
518                         wep_cmd->key[i].key_offset = i;
519                         not_empty = 1;
520                 } else {
521                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
522                 }
523
524                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
525                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
526                                 priv->wep_keys[i].key_size);
527         }
528
529         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
530         wep_cmd->num_keys = WEP_KEYS_MAX;
531
532         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
533
534         cmd.len = cmd_size;
535
536         if (not_empty || send_if_empty)
537                 return iwl_send_cmd(priv, &cmd);
538         else
539                 return 0;
540 }
541 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
542
543 int iwl_remove_default_wep_key(struct iwl_priv *priv,
544                                struct ieee80211_key_conf *keyconf)
545 {
546         int ret;
547         unsigned long flags;
548
549         spin_lock_irqsave(&priv->sta_lock, flags);
550         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
551                       keyconf->keyidx);
552
553         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
554                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
555                           keyconf->keyidx);
556
557         priv->default_wep_key--;
558         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
559         if (iwl_is_rfkill(priv)) {
560                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
561                 spin_unlock_irqrestore(&priv->sta_lock, flags);
562                 return 0;
563         }
564         ret = iwl_send_static_wepkey_cmd(priv, 1);
565         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
566                       keyconf->keyidx, ret);
567         spin_unlock_irqrestore(&priv->sta_lock, flags);
568
569         return ret;
570 }
571 EXPORT_SYMBOL(iwl_remove_default_wep_key);
572
573 int iwl_set_default_wep_key(struct iwl_priv *priv,
574                             struct ieee80211_key_conf *keyconf)
575 {
576         int ret;
577         unsigned long flags;
578
579         if (keyconf->keylen != WEP_KEY_LEN_128 &&
580             keyconf->keylen != WEP_KEY_LEN_64) {
581                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
582                 return -EINVAL;
583         }
584
585         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
586         keyconf->hw_key_idx = HW_KEY_DEFAULT;
587         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
588
589         spin_lock_irqsave(&priv->sta_lock, flags);
590         priv->default_wep_key++;
591
592         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
593                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
594                         keyconf->keyidx);
595
596         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
597         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
598                                                         keyconf->keylen);
599
600         ret = iwl_send_static_wepkey_cmd(priv, 0);
601         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
602                 keyconf->keylen, keyconf->keyidx, ret);
603         spin_unlock_irqrestore(&priv->sta_lock, flags);
604
605         return ret;
606 }
607 EXPORT_SYMBOL(iwl_set_default_wep_key);
608
609 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
610                                 struct ieee80211_key_conf *keyconf,
611                                 u8 sta_id)
612 {
613         unsigned long flags;
614         __le16 key_flags = 0;
615         int ret;
616
617         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
618
619         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
620         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
621         key_flags &= ~STA_KEY_FLG_INVALID;
622
623         if (keyconf->keylen == WEP_KEY_LEN_128)
624                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
625
626         if (sta_id == priv->hw_params.bcast_sta_id)
627                 key_flags |= STA_KEY_MULTICAST_MSK;
628
629         spin_lock_irqsave(&priv->sta_lock, flags);
630
631         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
632         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
633         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
634
635         memcpy(priv->stations[sta_id].keyinfo.key,
636                                 keyconf->key, keyconf->keylen);
637
638         memcpy(&priv->stations[sta_id].sta.key.key[3],
639                                 keyconf->key, keyconf->keylen);
640
641         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
642                         == STA_KEY_FLG_NO_ENC)
643                 priv->stations[sta_id].sta.key.key_offset =
644                                  iwl_get_free_ucode_key_index(priv);
645         /* else, we are overriding an existing key => no need to allocated room
646          * in uCode. */
647
648         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
649                 "no space for a new key");
650
651         priv->stations[sta_id].sta.key.key_flags = key_flags;
652         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
653         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
654
655         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
656
657         spin_unlock_irqrestore(&priv->sta_lock, flags);
658
659         return ret;
660 }
661
662 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
663                                    struct ieee80211_key_conf *keyconf,
664                                    u8 sta_id)
665 {
666         unsigned long flags;
667         __le16 key_flags = 0;
668         int ret;
669
670         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
671         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
672         key_flags &= ~STA_KEY_FLG_INVALID;
673
674         if (sta_id == priv->hw_params.bcast_sta_id)
675                 key_flags |= STA_KEY_MULTICAST_MSK;
676
677         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
678
679         spin_lock_irqsave(&priv->sta_lock, flags);
680         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
681         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
682
683         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
684                keyconf->keylen);
685
686         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
687                keyconf->keylen);
688
689         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
690                         == STA_KEY_FLG_NO_ENC)
691                 priv->stations[sta_id].sta.key.key_offset =
692                                  iwl_get_free_ucode_key_index(priv);
693         /* else, we are overriding an existing key => no need to allocated room
694          * in uCode. */
695
696         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
697                 "no space for a new key");
698
699         priv->stations[sta_id].sta.key.key_flags = key_flags;
700         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
701         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
702
703         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
704
705         spin_unlock_irqrestore(&priv->sta_lock, flags);
706
707         return ret;
708 }
709
710 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
711                                    struct ieee80211_key_conf *keyconf,
712                                    u8 sta_id)
713 {
714         unsigned long flags;
715         int ret = 0;
716         __le16 key_flags = 0;
717
718         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
719         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
720         key_flags &= ~STA_KEY_FLG_INVALID;
721
722         if (sta_id == priv->hw_params.bcast_sta_id)
723                 key_flags |= STA_KEY_MULTICAST_MSK;
724
725         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
726         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
727
728         spin_lock_irqsave(&priv->sta_lock, flags);
729
730         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
731         priv->stations[sta_id].keyinfo.keylen = 16;
732
733         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
734                         == STA_KEY_FLG_NO_ENC)
735                 priv->stations[sta_id].sta.key.key_offset =
736                                  iwl_get_free_ucode_key_index(priv);
737         /* else, we are overriding an existing key => no need to allocated room
738          * in uCode. */
739
740         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
741                 "no space for a new key");
742
743         priv->stations[sta_id].sta.key.key_flags = key_flags;
744
745
746         /* This copy is acutally not needed: we get the key with each TX */
747         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
748
749         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
750
751         spin_unlock_irqrestore(&priv->sta_lock, flags);
752
753         return ret;
754 }
755
756 void iwl_update_tkip_key(struct iwl_priv *priv,
757                         struct ieee80211_key_conf *keyconf,
758                         const u8 *addr, u32 iv32, u16 *phase1key)
759 {
760         u8 sta_id = IWL_INVALID_STATION;
761         unsigned long flags;
762         int i;
763
764         sta_id = iwl_find_station(priv, addr);
765         if (sta_id == IWL_INVALID_STATION) {
766                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
767                                    addr);
768                 return;
769         }
770
771         if (iwl_scan_cancel(priv)) {
772                 /* cancel scan failed, just live w/ bad key and rely
773                    briefly on SW decryption */
774                 return;
775         }
776
777         spin_lock_irqsave(&priv->sta_lock, flags);
778
779         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
780
781         for (i = 0; i < 5; i++)
782                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
783                         cpu_to_le16(phase1key[i]);
784
785         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
786         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
787
788         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
789
790         spin_unlock_irqrestore(&priv->sta_lock, flags);
791
792 }
793 EXPORT_SYMBOL(iwl_update_tkip_key);
794
795 int iwl_remove_dynamic_key(struct iwl_priv *priv,
796                                 struct ieee80211_key_conf *keyconf,
797                                 u8 sta_id)
798 {
799         unsigned long flags;
800         int ret = 0;
801         u16 key_flags;
802         u8 keyidx;
803
804         priv->key_mapping_key--;
805
806         spin_lock_irqsave(&priv->sta_lock, flags);
807         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
808         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
809
810         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
811                       keyconf->keyidx, sta_id);
812
813         if (keyconf->keyidx != keyidx) {
814                 /* We need to remove a key with index different that the one
815                  * in the uCode. This means that the key we need to remove has
816                  * been replaced by another one with different index.
817                  * Don't do anything and return ok
818                  */
819                 spin_unlock_irqrestore(&priv->sta_lock, flags);
820                 return 0;
821         }
822
823         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
824                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
825                             keyconf->keyidx, key_flags);
826                 spin_unlock_irqrestore(&priv->sta_lock, flags);
827                 return 0;
828         }
829
830         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
831                 &priv->ucode_key_table))
832                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
833                         priv->stations[sta_id].sta.key.key_offset);
834         memset(&priv->stations[sta_id].keyinfo, 0,
835                                         sizeof(struct iwl_hw_key));
836         memset(&priv->stations[sta_id].sta.key, 0,
837                                         sizeof(struct iwl4965_keyinfo));
838         priv->stations[sta_id].sta.key.key_flags =
839                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
840         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
841         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
842         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
843
844         if (iwl_is_rfkill(priv)) {
845                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled. \n");
846                 spin_unlock_irqrestore(&priv->sta_lock, flags);
847                 return 0;
848         }
849         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
850         spin_unlock_irqrestore(&priv->sta_lock, flags);
851         return ret;
852 }
853 EXPORT_SYMBOL(iwl_remove_dynamic_key);
854
855 int iwl_set_dynamic_key(struct iwl_priv *priv,
856                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
857 {
858         int ret;
859
860         priv->key_mapping_key++;
861         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
862
863         switch (keyconf->alg) {
864         case ALG_CCMP:
865                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
866                 break;
867         case ALG_TKIP:
868                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
869                 break;
870         case ALG_WEP:
871                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
872                 break;
873         default:
874                 IWL_ERR(priv,
875                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
876                 ret = -EINVAL;
877         }
878
879         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
880                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
881                       sta_id, ret);
882
883         return ret;
884 }
885 EXPORT_SYMBOL(iwl_set_dynamic_key);
886
887 #ifdef CONFIG_IWLWIFI_DEBUG
888 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
889                            struct iwl_link_quality_cmd *lq)
890 {
891         int i;
892         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
893         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
894                        lq->general_params.single_stream_ant_msk,
895                        lq->general_params.dual_stream_ant_msk);
896
897         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
898                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
899                                i, lq->rs_table[i].rate_n_flags);
900 }
901 #else
902 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
903                                    struct iwl_link_quality_cmd *lq)
904 {
905 }
906 #endif
907
908 int iwl_send_lq_cmd(struct iwl_priv *priv,
909                     struct iwl_link_quality_cmd *lq, u8 flags)
910 {
911         struct iwl_host_cmd cmd = {
912                 .id = REPLY_TX_LINK_QUALITY_CMD,
913                 .len = sizeof(struct iwl_link_quality_cmd),
914                 .flags = flags,
915                 .data = lq,
916         };
917
918         if ((lq->sta_id == 0xFF) &&
919             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
920                 return -EINVAL;
921
922         if (lq->sta_id == 0xFF)
923                 lq->sta_id = IWL_AP_ID;
924
925         iwl_dump_lq_cmd(priv, lq);
926
927         if (iwl_is_associated(priv) && priv->assoc_station_added)
928                 return  iwl_send_cmd(priv, &cmd);
929
930         return 0;
931 }
932 EXPORT_SYMBOL(iwl_send_lq_cmd);
933
934 /**
935  * iwl_sta_init_lq - Initialize a station's hardware rate table
936  *
937  * The uCode's station table contains a table of fallback rates
938  * for automatic fallback during transmission.
939  *
940  * NOTE: This sets up a default set of values.  These will be replaced later
941  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
942  *       rc80211_simple.
943  *
944  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
945  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
946  *       which requires station table entry to exist).
947  */
948 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
949 {
950         int i, r;
951         struct iwl_link_quality_cmd link_cmd = {
952                 .reserved1 = 0,
953         };
954         u32 rate_flags;
955
956         /* Set up the rate scaling to start at selected rate, fall back
957          * all the way down to 1M in IEEE order, and then spin on 1M */
958         if (is_ap)
959                 r = IWL_RATE_54M_INDEX;
960         else if (priv->band == IEEE80211_BAND_5GHZ)
961                 r = IWL_RATE_6M_INDEX;
962         else
963                 r = IWL_RATE_1M_INDEX;
964
965         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
966                 rate_flags = 0;
967                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
968                         rate_flags |= RATE_MCS_CCK_MSK;
969
970                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
971                                 RATE_MCS_ANT_POS;
972
973                 link_cmd.rs_table[i].rate_n_flags =
974                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
975                 r = iwl_get_prev_ieee_rate(r);
976         }
977
978         link_cmd.general_params.single_stream_ant_msk =
979                                 first_antenna(priv->hw_params.valid_tx_ant);
980         link_cmd.general_params.dual_stream_ant_msk = 3;
981         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
982         link_cmd.agg_params.agg_time_limit =
983                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
984
985         /* Update the rate scaling for control frame Tx to AP */
986         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
987
988         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
989                                sizeof(link_cmd), &link_cmd, NULL);
990 }
991
992 /**
993  * iwl_rxon_add_station - add station into station table.
994  *
995  * there is only one AP station with id= IWL_AP_ID
996  * NOTE: mutex must be held before calling this function
997  */
998 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
999 {
1000         struct ieee80211_sta *sta;
1001         struct ieee80211_sta_ht_cap ht_config;
1002         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
1003         u8 sta_id;
1004
1005         /* Add station to device's station table */
1006
1007         /*
1008          * XXX: This check is definitely not correct, if we're an AP
1009          *      it'll always be false which is not what we want, but
1010          *      it doesn't look like iwlagn is prepared to be an HT
1011          *      AP anyway.
1012          */
1013         if (priv->current_ht_config.is_ht) {
1014                 rcu_read_lock();
1015                 sta = ieee80211_find_sta(priv->hw, addr);
1016                 if (sta) {
1017                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1018                         cur_ht_config = &ht_config;
1019                 }
1020                 rcu_read_unlock();
1021         }
1022
1023         sta_id = iwl_add_station(priv, addr, is_ap, CMD_SYNC, cur_ht_config);
1024
1025         /* Set up default rate scaling table in device's station table */
1026         iwl_sta_init_lq(priv, addr, is_ap);
1027
1028         return sta_id;
1029 }
1030 EXPORT_SYMBOL(iwl_rxon_add_station);
1031
1032 /**
1033  * iwl_get_sta_id - Find station's index within station table
1034  *
1035  * If new IBSS station, create new entry in station table
1036  */
1037 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1038 {
1039         int sta_id;
1040         __le16 fc = hdr->frame_control;
1041
1042         /* If this frame is broadcast or management, use broadcast station id */
1043         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1044                 return priv->hw_params.bcast_sta_id;
1045
1046         switch (priv->iw_mode) {
1047
1048         /* If we are a client station in a BSS network, use the special
1049          * AP station entry (that's the only station we communicate with) */
1050         case NL80211_IFTYPE_STATION:
1051                 return IWL_AP_ID;
1052
1053         /* If we are an AP, then find the station, or use BCAST */
1054         case NL80211_IFTYPE_AP:
1055                 sta_id = iwl_find_station(priv, hdr->addr1);
1056                 if (sta_id != IWL_INVALID_STATION)
1057                         return sta_id;
1058                 return priv->hw_params.bcast_sta_id;
1059
1060         /* If this frame is going out to an IBSS network, find the station,
1061          * or create a new station table entry */
1062         case NL80211_IFTYPE_ADHOC:
1063                 sta_id = iwl_find_station(priv, hdr->addr1);
1064                 if (sta_id != IWL_INVALID_STATION)
1065                         return sta_id;
1066
1067                 /* Create new station table entry */
1068                 sta_id = iwl_add_station(priv, hdr->addr1, false,
1069                                         CMD_ASYNC, NULL);
1070
1071                 if (sta_id != IWL_INVALID_STATION)
1072                         return sta_id;
1073
1074                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1075                                "Defaulting to broadcast...\n",
1076                                hdr->addr1);
1077                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1078                 return priv->hw_params.bcast_sta_id;
1079
1080         default:
1081                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1082                         priv->iw_mode);
1083                 return priv->hw_params.bcast_sta_id;
1084         }
1085 }
1086 EXPORT_SYMBOL(iwl_get_sta_id);
1087
1088 /**
1089  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1090  */
1091 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1092 {
1093         unsigned long flags;
1094
1095         /* Remove "disable" flag, to enable Tx for this TID */
1096         spin_lock_irqsave(&priv->sta_lock, flags);
1097         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1098         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1099         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1100         spin_unlock_irqrestore(&priv->sta_lock, flags);
1101
1102         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1103 }
1104 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1105
1106 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1107                          const u8 *addr, int tid, u16 ssn)
1108 {
1109         unsigned long flags;
1110         int sta_id;
1111
1112         sta_id = iwl_find_station(priv, addr);
1113         if (sta_id == IWL_INVALID_STATION)
1114                 return -ENXIO;
1115
1116         spin_lock_irqsave(&priv->sta_lock, flags);
1117         priv->stations[sta_id].sta.station_flags_msk = 0;
1118         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1119         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1120         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1121         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1122         spin_unlock_irqrestore(&priv->sta_lock, flags);
1123
1124         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1125                                         CMD_ASYNC);
1126 }
1127 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1128
1129 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1130 {
1131         unsigned long flags;
1132         int sta_id;
1133
1134         sta_id = iwl_find_station(priv, addr);
1135         if (sta_id == IWL_INVALID_STATION) {
1136                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1137                 return -ENXIO;
1138         }
1139
1140         spin_lock_irqsave(&priv->sta_lock, flags);
1141         priv->stations[sta_id].sta.station_flags_msk = 0;
1142         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1143         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1144         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1145         spin_unlock_irqrestore(&priv->sta_lock, flags);
1146
1147         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1148                                         CMD_ASYNC);
1149 }
1150 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1151
1152 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1153 {
1154         unsigned long flags;
1155
1156         spin_lock_irqsave(&priv->sta_lock, flags);
1157         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1158         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1159         priv->stations[sta_id].sta.sta.modify_mask = 0;
1160         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1161         spin_unlock_irqrestore(&priv->sta_lock, flags);
1162
1163         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1164 }
1165
1166 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1167 {
1168         /* FIXME: need locking over ps_status ??? */
1169         u8 sta_id = iwl_find_station(priv, addr);
1170
1171         if (sta_id != IWL_INVALID_STATION) {
1172                 u8 sta_awake = priv->stations[sta_id].
1173                                 ps_status == STA_PS_STATUS_WAKE;
1174
1175                 if (sta_awake && ps_bit)
1176                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1177                 else if (!sta_awake && !ps_bit) {
1178                         iwl_sta_modify_ps_wake(priv, sta_id);
1179                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1180                 }
1181         }
1182 }
1183