Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[linux-2.6] / drivers / net / wireless / iwlwifi / iwl-sta.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
4  *
5  * Portions of this file are derived from the ipw3945 project, as well
6  * as portions of the ieee80211 subsystem header files.
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of version 2 of the GNU General Public License as
10  * published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along with
18  * this program; if not, write to the Free Software Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20  *
21  * The full GNU General Public License is included in this distribution in the
22  * file called LICENSE.
23  *
24  * Contact Information:
25  *  Intel Linux Wireless <ilw@linux.intel.com>
26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27  *
28  *****************************************************************************/
29
30 #include <net/mac80211.h>
31 #include <linux/etherdevice.h>
32
33 #include "iwl-dev.h"
34 #include "iwl-core.h"
35 #include "iwl-sta.h"
36
37 #define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
38 #define IWL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
39
40 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
41 {
42         int i;
43         int start = 0;
44         int ret = IWL_INVALID_STATION;
45         unsigned long flags;
46
47         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
48             (priv->iw_mode == NL80211_IFTYPE_AP))
49                 start = IWL_STA_ID;
50
51         if (is_broadcast_ether_addr(addr))
52                 return priv->hw_params.bcast_sta_id;
53
54         spin_lock_irqsave(&priv->sta_lock, flags);
55         for (i = start; i < priv->hw_params.max_stations; i++)
56                 if (priv->stations[i].used &&
57                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
58                                          addr))) {
59                         ret = i;
60                         goto out;
61                 }
62
63         IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
64                               addr, priv->num_stations);
65
66  out:
67         spin_unlock_irqrestore(&priv->sta_lock, flags);
68         return ret;
69 }
70 EXPORT_SYMBOL(iwl_find_station);
71
72 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
73 {
74         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
75                 return IWL_AP_ID;
76         } else {
77                 u8 *da = ieee80211_get_DA(hdr);
78                 return iwl_find_station(priv, da);
79         }
80 }
81 EXPORT_SYMBOL(iwl_get_ra_sta_id);
82
83 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
84 {
85         unsigned long flags;
86
87         spin_lock_irqsave(&priv->sta_lock, flags);
88
89         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
90                 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 int iwl_add_sta_callback(struct iwl_priv *priv,
101                                    struct iwl_cmd *cmd, struct sk_buff *skb)
102 {
103         struct iwl_rx_packet *res = NULL;
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 (!skb) {
109                 IWL_ERR(priv, "Error: Response NULL in REPLY_ADD_STA.\n");
110                 return 1;
111         }
112
113         res = (struct iwl_rx_packet *)skb->data;
114         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
115                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
116                           res->hdr.flags);
117                 return 1;
118         }
119
120         switch (res->u.add_sta.status) {
121         case ADD_STA_SUCCESS_MSK:
122                 iwl_sta_ucode_activate(priv, sta_id);
123                  /* fall through */
124         default:
125                 IWL_DEBUG_HC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
126                              res->u.add_sta.status);
127                 break;
128         }
129
130         /* We didn't cache the SKB; let the caller free it */
131         return 1;
132 }
133
134 int iwl_send_add_sta(struct iwl_priv *priv,
135                      struct iwl_addsta_cmd *sta, u8 flags)
136 {
137         struct iwl_rx_packet *res = NULL;
138         int ret = 0;
139         u8 data[sizeof(*sta)];
140         struct iwl_host_cmd cmd = {
141                 .id = REPLY_ADD_STA,
142                 .meta.flags = flags,
143                 .data = data,
144         };
145
146         if (flags & CMD_ASYNC)
147                 cmd.meta.u.callback = iwl_add_sta_callback;
148         else
149                 cmd.meta.flags |= CMD_WANT_SKB;
150
151         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
152         ret = iwl_send_cmd(priv, &cmd);
153
154         if (ret || (flags & CMD_ASYNC))
155                 return ret;
156
157         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
158         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
159                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
160                           res->hdr.flags);
161                 ret = -EIO;
162         }
163
164         if (ret == 0) {
165                 switch (res->u.add_sta.status) {
166                 case ADD_STA_SUCCESS_MSK:
167                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
168                         IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
169                         break;
170                 default:
171                         ret = -EIO;
172                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
173                         break;
174                 }
175         }
176
177         priv->alloc_rxb_skb--;
178         dev_kfree_skb_any(cmd.meta.u.skb);
179
180         return ret;
181 }
182 EXPORT_SYMBOL(iwl_send_add_sta);
183
184 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
185                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
186 {
187         __le32 sta_flags;
188         u8 mimo_ps_mode;
189
190         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
191                 goto done;
192
193         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
194
195         sta_flags = priv->stations[index].sta.station_flags;
196
197         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
198
199         switch (mimo_ps_mode) {
200         case WLAN_HT_CAP_SM_PS_STATIC:
201                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
202                 break;
203         case WLAN_HT_CAP_SM_PS_DYNAMIC:
204                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
205                 break;
206         case WLAN_HT_CAP_SM_PS_DISABLED:
207                 break;
208         default:
209                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
210                 break;
211         }
212
213         sta_flags |= cpu_to_le32(
214               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
215
216         sta_flags |= cpu_to_le32(
217               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
218
219         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
220                 sta_flags |= STA_FLG_FAT_EN_MSK;
221         else
222                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
223
224         priv->stations[index].sta.station_flags = sta_flags;
225  done:
226         return;
227 }
228
229 /**
230  * iwl_add_station - Add station to tables in driver and device
231  */
232 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap, u8 flags,
233                 struct ieee80211_sta_ht_cap *ht_info)
234 {
235         struct iwl_station_entry *station;
236         unsigned long flags_spin;
237         int i;
238         int sta_id = IWL_INVALID_STATION;
239         u16 rate;
240
241         spin_lock_irqsave(&priv->sta_lock, flags_spin);
242         if (is_ap)
243                 sta_id = IWL_AP_ID;
244         else if (is_broadcast_ether_addr(addr))
245                 sta_id = priv->hw_params.bcast_sta_id;
246         else
247                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
248                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
249                                                 addr)) {
250                                 sta_id = i;
251                                 break;
252                         }
253
254                         if (!priv->stations[i].used &&
255                             sta_id == IWL_INVALID_STATION)
256                                 sta_id = i;
257                 }
258
259         /* These two conditions have the same outcome, but keep them separate
260            since they have different meanings */
261         if (unlikely(sta_id == IWL_INVALID_STATION)) {
262                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
263                 return sta_id;
264         }
265
266         if (priv->stations[sta_id].used &&
267             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
268                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
269                 return sta_id;
270         }
271
272
273         station = &priv->stations[sta_id];
274         station->used = IWL_STA_DRIVER_ACTIVE;
275         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
276                         sta_id, addr);
277         priv->num_stations++;
278
279         /* Set up the REPLY_ADD_STA command to send to device */
280         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
281         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
282         station->sta.mode = 0;
283         station->sta.sta.sta_id = sta_id;
284         station->sta.station_flags = 0;
285
286         /* BCAST station and IBSS stations do not work in HT mode */
287         if (sta_id != priv->hw_params.bcast_sta_id &&
288             priv->iw_mode != NL80211_IFTYPE_ADHOC)
289                 iwl_set_ht_add_station(priv, sta_id, ht_info);
290
291         /* 3945 only */
292         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
293                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
294         /* Turn on both antennas for the station... */
295         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
296
297         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
298
299         /* Add station to device's station table */
300         iwl_send_add_sta(priv, &station->sta, flags);
301         return sta_id;
302
303 }
304 EXPORT_SYMBOL(iwl_add_station);
305
306 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
307 {
308         unsigned long flags;
309         u8 sta_id = iwl_find_station(priv, addr);
310
311         BUG_ON(sta_id == IWL_INVALID_STATION);
312
313         IWL_DEBUG_ASSOC(priv, "Removed STA from Ucode: %pM\n", addr);
314
315         spin_lock_irqsave(&priv->sta_lock, flags);
316
317         /* Ucode must be active and driver must be non active */
318         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
319                 IWL_ERR(priv, "removed non active STA %d\n", sta_id);
320
321         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
322
323         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
324         spin_unlock_irqrestore(&priv->sta_lock, flags);
325 }
326
327 static int iwl_remove_sta_callback(struct iwl_priv *priv,
328                                    struct iwl_cmd *cmd, struct sk_buff *skb)
329 {
330         struct iwl_rx_packet *res = NULL;
331         struct iwl_rem_sta_cmd *rm_sta =
332                  (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
333         const char *addr = rm_sta->addr;
334
335         if (!skb) {
336                 IWL_ERR(priv, "Error: Response NULL in REPLY_REMOVE_STA.\n");
337                 return 1;
338         }
339
340         res = (struct iwl_rx_packet *)skb->data;
341         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
342                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
343                 res->hdr.flags);
344                 return 1;
345         }
346
347         switch (res->u.rem_sta.status) {
348         case REM_STA_SUCCESS_MSK:
349                 iwl_sta_ucode_deactivate(priv, addr);
350                 break;
351         default:
352                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
353                 break;
354         }
355
356         /* We didn't cache the SKB; let the caller free it */
357         return 1;
358 }
359
360 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
361                                    u8 flags)
362 {
363         struct iwl_rx_packet *res = NULL;
364         int ret;
365
366         struct iwl_rem_sta_cmd rm_sta_cmd;
367
368         struct iwl_host_cmd cmd = {
369                 .id = REPLY_REMOVE_STA,
370                 .len = sizeof(struct iwl_rem_sta_cmd),
371                 .meta.flags = flags,
372                 .data = &rm_sta_cmd,
373         };
374
375         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
376         rm_sta_cmd.num_sta = 1;
377         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
378
379         if (flags & CMD_ASYNC)
380                 cmd.meta.u.callback = iwl_remove_sta_callback;
381         else
382                 cmd.meta.flags |= CMD_WANT_SKB;
383         ret = iwl_send_cmd(priv, &cmd);
384
385         if (ret || (flags & CMD_ASYNC))
386                 return ret;
387
388         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
389         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
390                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
391                           res->hdr.flags);
392                 ret = -EIO;
393         }
394
395         if (!ret) {
396                 switch (res->u.rem_sta.status) {
397                 case REM_STA_SUCCESS_MSK:
398                         iwl_sta_ucode_deactivate(priv, addr);
399                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
400                         break;
401                 default:
402                         ret = -EIO;
403                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
404                         break;
405                 }
406         }
407
408         priv->alloc_rxb_skb--;
409         dev_kfree_skb_any(cmd.meta.u.skb);
410
411         return ret;
412 }
413
414 /**
415  * iwl_remove_station - Remove driver's knowledge of station.
416  */
417 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
418 {
419         int sta_id = IWL_INVALID_STATION;
420         int i, ret = -EINVAL;
421         unsigned long flags;
422
423         spin_lock_irqsave(&priv->sta_lock, flags);
424
425         if (is_ap)
426                 sta_id = IWL_AP_ID;
427         else if (is_broadcast_ether_addr(addr))
428                 sta_id = priv->hw_params.bcast_sta_id;
429         else
430                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
431                         if (priv->stations[i].used &&
432                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
433                                                 addr)) {
434                                 sta_id = i;
435                                 break;
436                         }
437
438         if (unlikely(sta_id == IWL_INVALID_STATION))
439                 goto out;
440
441         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
442                 sta_id, addr);
443
444         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
445                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
446                                 addr);
447                 goto out;
448         }
449
450         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
451                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
452                                 addr);
453                 goto out;
454         }
455
456
457         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
458
459         priv->num_stations--;
460
461         BUG_ON(priv->num_stations < 0);
462
463         spin_unlock_irqrestore(&priv->sta_lock, flags);
464
465         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
466         return ret;
467 out:
468         spin_unlock_irqrestore(&priv->sta_lock, flags);
469         return ret;
470 }
471 EXPORT_SYMBOL(iwl_remove_station);
472
473 /**
474  * iwl_clear_stations_table - Clear the driver's station table
475  *
476  * NOTE:  This does not clear or otherwise alter the device's station table.
477  */
478 void iwl_clear_stations_table(struct iwl_priv *priv)
479 {
480         unsigned long flags;
481         int i;
482
483         spin_lock_irqsave(&priv->sta_lock, flags);
484
485         if (iwl_is_alive(priv) &&
486            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
487            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
488                 IWL_ERR(priv, "Couldn't clear the station table\n");
489
490         priv->num_stations = 0;
491         memset(priv->stations, 0, sizeof(priv->stations));
492
493         /* clean ucode key table bit map */
494         priv->ucode_key_table = 0;
495
496         /* keep track of static keys */
497         for (i = 0; i < WEP_KEYS_MAX ; i++) {
498                 if (priv->wep_keys[i].key_size)
499                         set_bit(i, &priv->ucode_key_table);
500         }
501
502         spin_unlock_irqrestore(&priv->sta_lock, flags);
503 }
504 EXPORT_SYMBOL(iwl_clear_stations_table);
505
506 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
507 {
508         int i;
509
510         for (i = 0; i < STA_KEY_MAX_NUM; i++)
511                 if (!test_and_set_bit(i, &priv->ucode_key_table))
512                         return i;
513
514         return WEP_INVALID_OFFSET;
515 }
516 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
517
518 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
519 {
520         int i, not_empty = 0;
521         u8 buff[sizeof(struct iwl_wep_cmd) +
522                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
523         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
524         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
525         struct iwl_host_cmd cmd = {
526                 .id = REPLY_WEPKEY,
527                 .data = wep_cmd,
528                 .meta.flags = CMD_ASYNC,
529         };
530
531         memset(wep_cmd, 0, cmd_size +
532                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
533
534         for (i = 0; i < WEP_KEYS_MAX ; i++) {
535                 wep_cmd->key[i].key_index = i;
536                 if (priv->wep_keys[i].key_size) {
537                         wep_cmd->key[i].key_offset = i;
538                         not_empty = 1;
539                 } else {
540                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
541                 }
542
543                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
544                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
545                                 priv->wep_keys[i].key_size);
546         }
547
548         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
549         wep_cmd->num_keys = WEP_KEYS_MAX;
550
551         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
552
553         cmd.len = cmd_size;
554
555         if (not_empty || send_if_empty)
556                 return iwl_send_cmd(priv, &cmd);
557         else
558                 return 0;
559 }
560 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
561
562 int iwl_remove_default_wep_key(struct iwl_priv *priv,
563                                struct ieee80211_key_conf *keyconf)
564 {
565         int ret;
566         unsigned long flags;
567
568         spin_lock_irqsave(&priv->sta_lock, flags);
569
570         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
571                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
572                           keyconf->keyidx);
573
574         priv->default_wep_key--;
575         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
576         ret = iwl_send_static_wepkey_cmd(priv, 1);
577         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
578                       keyconf->keyidx, ret);
579         spin_unlock_irqrestore(&priv->sta_lock, flags);
580
581         return ret;
582 }
583 EXPORT_SYMBOL(iwl_remove_default_wep_key);
584
585 int iwl_set_default_wep_key(struct iwl_priv *priv,
586                             struct ieee80211_key_conf *keyconf)
587 {
588         int ret;
589         unsigned long flags;
590
591         if (keyconf->keylen != WEP_KEY_LEN_128 &&
592             keyconf->keylen != WEP_KEY_LEN_64) {
593                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
594                 return -EINVAL;
595         }
596
597         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
598         keyconf->hw_key_idx = HW_KEY_DEFAULT;
599         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
600
601         spin_lock_irqsave(&priv->sta_lock, flags);
602         priv->default_wep_key++;
603
604         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
605                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
606                         keyconf->keyidx);
607
608         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
609         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
610                                                         keyconf->keylen);
611
612         ret = iwl_send_static_wepkey_cmd(priv, 0);
613         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
614                 keyconf->keylen, keyconf->keyidx, ret);
615         spin_unlock_irqrestore(&priv->sta_lock, flags);
616
617         return ret;
618 }
619 EXPORT_SYMBOL(iwl_set_default_wep_key);
620
621 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
622                                 struct ieee80211_key_conf *keyconf,
623                                 u8 sta_id)
624 {
625         unsigned long flags;
626         __le16 key_flags = 0;
627         int ret;
628
629         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
630
631         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
632         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
633         key_flags &= ~STA_KEY_FLG_INVALID;
634
635         if (keyconf->keylen == WEP_KEY_LEN_128)
636                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
637
638         if (sta_id == priv->hw_params.bcast_sta_id)
639                 key_flags |= STA_KEY_MULTICAST_MSK;
640
641         spin_lock_irqsave(&priv->sta_lock, flags);
642
643         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
644         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
645         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
646
647         memcpy(priv->stations[sta_id].keyinfo.key,
648                                 keyconf->key, keyconf->keylen);
649
650         memcpy(&priv->stations[sta_id].sta.key.key[3],
651                                 keyconf->key, keyconf->keylen);
652
653         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
654                         == STA_KEY_FLG_NO_ENC)
655                 priv->stations[sta_id].sta.key.key_offset =
656                                  iwl_get_free_ucode_key_index(priv);
657         /* else, we are overriding an existing key => no need to allocated room
658          * in uCode. */
659
660         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
661                 "no space for a new key");
662
663         priv->stations[sta_id].sta.key.key_flags = key_flags;
664         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
665         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
666
667         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
668
669         spin_unlock_irqrestore(&priv->sta_lock, flags);
670
671         return ret;
672 }
673
674 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
675                                    struct ieee80211_key_conf *keyconf,
676                                    u8 sta_id)
677 {
678         unsigned long flags;
679         __le16 key_flags = 0;
680         int ret;
681
682         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
683         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
684         key_flags &= ~STA_KEY_FLG_INVALID;
685
686         if (sta_id == priv->hw_params.bcast_sta_id)
687                 key_flags |= STA_KEY_MULTICAST_MSK;
688
689         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
690
691         spin_lock_irqsave(&priv->sta_lock, flags);
692         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
693         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
694
695         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
696                keyconf->keylen);
697
698         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
699                keyconf->keylen);
700
701         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
702                         == STA_KEY_FLG_NO_ENC)
703                 priv->stations[sta_id].sta.key.key_offset =
704                                  iwl_get_free_ucode_key_index(priv);
705         /* else, we are overriding an existing key => no need to allocated room
706          * in uCode. */
707
708         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
709                 "no space for a new key");
710
711         priv->stations[sta_id].sta.key.key_flags = key_flags;
712         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
713         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
714
715         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
716
717         spin_unlock_irqrestore(&priv->sta_lock, flags);
718
719         return ret;
720 }
721
722 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
723                                    struct ieee80211_key_conf *keyconf,
724                                    u8 sta_id)
725 {
726         unsigned long flags;
727         int ret = 0;
728         __le16 key_flags = 0;
729
730         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
731         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
732         key_flags &= ~STA_KEY_FLG_INVALID;
733
734         if (sta_id == priv->hw_params.bcast_sta_id)
735                 key_flags |= STA_KEY_MULTICAST_MSK;
736
737         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
738         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
739
740         spin_lock_irqsave(&priv->sta_lock, flags);
741
742         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
743         priv->stations[sta_id].keyinfo.keylen = 16;
744
745         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
746                         == STA_KEY_FLG_NO_ENC)
747                 priv->stations[sta_id].sta.key.key_offset =
748                                  iwl_get_free_ucode_key_index(priv);
749         /* else, we are overriding an existing key => no need to allocated room
750          * in uCode. */
751
752         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
753                 "no space for a new key");
754
755         priv->stations[sta_id].sta.key.key_flags = key_flags;
756
757
758         /* This copy is acutally not needed: we get the key with each TX */
759         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
760
761         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
762
763         spin_unlock_irqrestore(&priv->sta_lock, flags);
764
765         return ret;
766 }
767
768 void iwl_update_tkip_key(struct iwl_priv *priv,
769                         struct ieee80211_key_conf *keyconf,
770                         const u8 *addr, u32 iv32, u16 *phase1key)
771 {
772         u8 sta_id = IWL_INVALID_STATION;
773         unsigned long flags;
774         int i;
775
776         sta_id = iwl_find_station(priv, addr);
777         if (sta_id == IWL_INVALID_STATION) {
778                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
779                                    addr);
780                 return;
781         }
782
783         if (iwl_scan_cancel(priv)) {
784                 /* cancel scan failed, just live w/ bad key and rely
785                    briefly on SW decryption */
786                 return;
787         }
788
789         spin_lock_irqsave(&priv->sta_lock, flags);
790
791         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
792
793         for (i = 0; i < 5; i++)
794                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
795                         cpu_to_le16(phase1key[i]);
796
797         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
798         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
799
800         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
801
802         spin_unlock_irqrestore(&priv->sta_lock, flags);
803
804 }
805 EXPORT_SYMBOL(iwl_update_tkip_key);
806
807 int iwl_remove_dynamic_key(struct iwl_priv *priv,
808                                 struct ieee80211_key_conf *keyconf,
809                                 u8 sta_id)
810 {
811         unsigned long flags;
812         int ret = 0;
813         u16 key_flags;
814         u8 keyidx;
815
816         priv->key_mapping_key--;
817
818         spin_lock_irqsave(&priv->sta_lock, flags);
819         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
820         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
821
822         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
823                       keyconf->keyidx, sta_id);
824
825         if (keyconf->keyidx != keyidx) {
826                 /* We need to remove a key with index different that the one
827                  * in the uCode. This means that the key we need to remove has
828                  * been replaced by another one with different index.
829                  * Don't do anything and return ok
830                  */
831                 spin_unlock_irqrestore(&priv->sta_lock, flags);
832                 return 0;
833         }
834
835         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
836                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
837                             keyconf->keyidx, key_flags);
838                 spin_unlock_irqrestore(&priv->sta_lock, flags);
839                 return 0;
840         }
841
842         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
843                 &priv->ucode_key_table))
844                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
845                         priv->stations[sta_id].sta.key.key_offset);
846         memset(&priv->stations[sta_id].keyinfo, 0,
847                                         sizeof(struct iwl_hw_key));
848         memset(&priv->stations[sta_id].sta.key, 0,
849                                         sizeof(struct iwl4965_keyinfo));
850         priv->stations[sta_id].sta.key.key_flags =
851                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
852         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
853         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
854         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
855
856         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
857         spin_unlock_irqrestore(&priv->sta_lock, flags);
858         return ret;
859 }
860 EXPORT_SYMBOL(iwl_remove_dynamic_key);
861
862 int iwl_set_dynamic_key(struct iwl_priv *priv,
863                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
864 {
865         int ret;
866
867         priv->key_mapping_key++;
868         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
869
870         switch (keyconf->alg) {
871         case ALG_CCMP:
872                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
873                 break;
874         case ALG_TKIP:
875                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
876                 break;
877         case ALG_WEP:
878                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
879                 break;
880         default:
881                 IWL_ERR(priv,
882                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
883                 ret = -EINVAL;
884         }
885
886         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
887                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
888                       sta_id, ret);
889
890         return ret;
891 }
892 EXPORT_SYMBOL(iwl_set_dynamic_key);
893
894 #ifdef CONFIG_IWLWIFI_DEBUG
895 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
896                            struct iwl_link_quality_cmd *lq)
897 {
898         int i;
899         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
900         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
901                        lq->general_params.single_stream_ant_msk,
902                        lq->general_params.dual_stream_ant_msk);
903
904         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
905                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
906                                i, lq->rs_table[i].rate_n_flags);
907 }
908 #else
909 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
910                                    struct iwl_link_quality_cmd *lq)
911 {
912 }
913 #endif
914
915 int iwl_send_lq_cmd(struct iwl_priv *priv,
916                     struct iwl_link_quality_cmd *lq, u8 flags)
917 {
918         struct iwl_host_cmd cmd = {
919                 .id = REPLY_TX_LINK_QUALITY_CMD,
920                 .len = sizeof(struct iwl_link_quality_cmd),
921                 .meta.flags = flags,
922                 .data = lq,
923         };
924
925         if ((lq->sta_id == 0xFF) &&
926             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
927                 return -EINVAL;
928
929         if (lq->sta_id == 0xFF)
930                 lq->sta_id = IWL_AP_ID;
931
932         iwl_dump_lq_cmd(priv, lq);
933
934         if (iwl_is_associated(priv) && priv->assoc_station_added)
935                 return  iwl_send_cmd(priv, &cmd);
936
937         return 0;
938 }
939 EXPORT_SYMBOL(iwl_send_lq_cmd);
940
941 /**
942  * iwl_sta_init_lq - Initialize a station's hardware rate table
943  *
944  * The uCode's station table contains a table of fallback rates
945  * for automatic fallback during transmission.
946  *
947  * NOTE: This sets up a default set of values.  These will be replaced later
948  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
949  *       rc80211_simple.
950  *
951  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
952  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
953  *       which requires station table entry to exist).
954  */
955 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
956 {
957         int i, r;
958         struct iwl_link_quality_cmd link_cmd = {
959                 .reserved1 = 0,
960         };
961         u32 rate_flags;
962
963         /* Set up the rate scaling to start at selected rate, fall back
964          * all the way down to 1M in IEEE order, and then spin on 1M */
965         if (is_ap)
966                 r = IWL_RATE_54M_INDEX;
967         else if (priv->band == IEEE80211_BAND_5GHZ)
968                 r = IWL_RATE_6M_INDEX;
969         else
970                 r = IWL_RATE_1M_INDEX;
971
972         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
973                 rate_flags = 0;
974                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
975                         rate_flags |= RATE_MCS_CCK_MSK;
976
977                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
978                                 RATE_MCS_ANT_POS;
979
980                 link_cmd.rs_table[i].rate_n_flags =
981                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
982                 r = iwl_get_prev_ieee_rate(r);
983         }
984
985         link_cmd.general_params.single_stream_ant_msk =
986                                 first_antenna(priv->hw_params.valid_tx_ant);
987         link_cmd.general_params.dual_stream_ant_msk = 3;
988         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
989         link_cmd.agg_params.agg_time_limit =
990                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
991
992         /* Update the rate scaling for control frame Tx to AP */
993         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
994
995         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
996                                sizeof(link_cmd), &link_cmd, NULL);
997 }
998
999 /**
1000  * iwl_rxon_add_station - add station into station table.
1001  *
1002  * there is only one AP station with id= IWL_AP_ID
1003  * NOTE: mutex must be held before calling this function
1004  */
1005 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
1006 {
1007         struct ieee80211_sta *sta;
1008         struct ieee80211_sta_ht_cap ht_config;
1009         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
1010         u8 sta_id;
1011
1012         /* Add station to device's station table */
1013
1014         /*
1015          * XXX: This check is definitely not correct, if we're an AP
1016          *      it'll always be false which is not what we want, but
1017          *      it doesn't look like iwlagn is prepared to be an HT
1018          *      AP anyway.
1019          */
1020         if (priv->current_ht_config.is_ht) {
1021                 rcu_read_lock();
1022                 sta = ieee80211_find_sta(priv->hw, addr);
1023                 if (sta) {
1024                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1025                         cur_ht_config = &ht_config;
1026                 }
1027                 rcu_read_unlock();
1028         }
1029
1030         sta_id = iwl_add_station(priv, addr, is_ap, CMD_SYNC, cur_ht_config);
1031
1032         /* Set up default rate scaling table in device's station table */
1033         iwl_sta_init_lq(priv, addr, is_ap);
1034
1035         return sta_id;
1036 }
1037 EXPORT_SYMBOL(iwl_rxon_add_station);
1038
1039 /**
1040  * iwl_get_sta_id - Find station's index within station table
1041  *
1042  * If new IBSS station, create new entry in station table
1043  */
1044 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1045 {
1046         int sta_id;
1047         u16 fc = le16_to_cpu(hdr->frame_control);
1048
1049         /* If this frame is broadcast or management, use broadcast station id */
1050         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1051             is_multicast_ether_addr(hdr->addr1))
1052                 return priv->hw_params.bcast_sta_id;
1053
1054         switch (priv->iw_mode) {
1055
1056         /* If we are a client station in a BSS network, use the special
1057          * AP station entry (that's the only station we communicate with) */
1058         case NL80211_IFTYPE_STATION:
1059                 return IWL_AP_ID;
1060
1061         /* If we are an AP, then find the station, or use BCAST */
1062         case NL80211_IFTYPE_AP:
1063                 sta_id = iwl_find_station(priv, hdr->addr1);
1064                 if (sta_id != IWL_INVALID_STATION)
1065                         return sta_id;
1066                 return priv->hw_params.bcast_sta_id;
1067
1068         /* If this frame is going out to an IBSS network, find the station,
1069          * or create a new station table entry */
1070         case NL80211_IFTYPE_ADHOC:
1071                 sta_id = iwl_find_station(priv, hdr->addr1);
1072                 if (sta_id != IWL_INVALID_STATION)
1073                         return sta_id;
1074
1075                 /* Create new station table entry */
1076                 sta_id = iwl_add_station(priv, hdr->addr1, false,
1077                                         CMD_ASYNC, NULL);
1078
1079                 if (sta_id != IWL_INVALID_STATION)
1080                         return sta_id;
1081
1082                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1083                                "Defaulting to broadcast...\n",
1084                                hdr->addr1);
1085                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1086                 return priv->hw_params.bcast_sta_id;
1087
1088         default:
1089                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1090                         priv->iw_mode);
1091                 return priv->hw_params.bcast_sta_id;
1092         }
1093 }
1094 EXPORT_SYMBOL(iwl_get_sta_id);
1095
1096 /**
1097  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1098  */
1099 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1100 {
1101         unsigned long flags;
1102
1103         /* Remove "disable" flag, to enable Tx for this TID */
1104         spin_lock_irqsave(&priv->sta_lock, flags);
1105         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1106         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1107         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1108         spin_unlock_irqrestore(&priv->sta_lock, flags);
1109
1110         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1111 }
1112 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1113
1114 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1115                          const u8 *addr, int tid, u16 ssn)
1116 {
1117         unsigned long flags;
1118         int sta_id;
1119
1120         sta_id = iwl_find_station(priv, addr);
1121         if (sta_id == IWL_INVALID_STATION)
1122                 return -ENXIO;
1123
1124         spin_lock_irqsave(&priv->sta_lock, flags);
1125         priv->stations[sta_id].sta.station_flags_msk = 0;
1126         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1127         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1128         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1129         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1130         spin_unlock_irqrestore(&priv->sta_lock, flags);
1131
1132         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1133                                         CMD_ASYNC);
1134 }
1135 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1136
1137 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1138 {
1139         unsigned long flags;
1140         int sta_id;
1141
1142         sta_id = iwl_find_station(priv, addr);
1143         if (sta_id == IWL_INVALID_STATION) {
1144                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1145                 return -ENXIO;
1146         }
1147
1148         spin_lock_irqsave(&priv->sta_lock, flags);
1149         priv->stations[sta_id].sta.station_flags_msk = 0;
1150         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1151         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1152         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1153         spin_unlock_irqrestore(&priv->sta_lock, flags);
1154
1155         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1156                                         CMD_ASYNC);
1157 }
1158 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1159
1160 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1161 {
1162         unsigned long flags;
1163
1164         spin_lock_irqsave(&priv->sta_lock, flags);
1165         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1166         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1167         priv->stations[sta_id].sta.sta.modify_mask = 0;
1168         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1169         spin_unlock_irqrestore(&priv->sta_lock, flags);
1170
1171         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1172 }
1173
1174 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1175 {
1176         /* FIXME: need locking over ps_status ??? */
1177         u8 sta_id = iwl_find_station(priv, addr);
1178
1179         if (sta_id != IWL_INVALID_STATION) {
1180                 u8 sta_awake = priv->stations[sta_id].
1181                                 ps_status == STA_PS_STATUS_WAKE;
1182
1183                 if (sta_awake && ps_bit)
1184                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1185                 else if (!sta_awake && !ps_bit) {
1186                         iwl_sta_modify_ps_wake(priv, sta_id);
1187                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1188                 }
1189         }
1190 }
1191