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[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 sk_buff *skb)
103 {
104         struct iwl_rx_packet *res = NULL;
105         struct iwl_addsta_cmd *addsta =
106                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
107         u8 sta_id = addsta->sta.sta_id;
108
109         if (!skb) {
110                 IWL_ERR(priv, "Error: Response NULL in REPLY_ADD_STA.\n");
111                 return;
112         }
113
114         res = (struct iwl_rx_packet *)skb->data;
115         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
116                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
117                           res->hdr.flags);
118                 return;
119         }
120
121         switch (res->u.add_sta.status) {
122         case ADD_STA_SUCCESS_MSK:
123                 iwl_sta_ucode_activate(priv, sta_id);
124                  /* fall through */
125         default:
126                 IWL_DEBUG_HC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
127                              res->u.add_sta.status);
128                 break;
129         }
130 }
131
132 int iwl_send_add_sta(struct iwl_priv *priv,
133                      struct iwl_addsta_cmd *sta, u8 flags)
134 {
135         struct iwl_rx_packet *res = NULL;
136         int ret = 0;
137         u8 data[sizeof(*sta)];
138         struct iwl_host_cmd cmd = {
139                 .id = REPLY_ADD_STA,
140                 .flags = flags,
141                 .data = data,
142         };
143
144         if (flags & CMD_ASYNC)
145                 cmd.callback = iwl_add_sta_callback;
146         else
147                 cmd.flags |= CMD_WANT_SKB;
148
149         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
150         ret = iwl_send_cmd(priv, &cmd);
151
152         if (ret || (flags & CMD_ASYNC))
153                 return ret;
154
155         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
156         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
157                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
158                           res->hdr.flags);
159                 ret = -EIO;
160         }
161
162         if (ret == 0) {
163                 switch (res->u.add_sta.status) {
164                 case ADD_STA_SUCCESS_MSK:
165                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
166                         IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
167                         break;
168                 default:
169                         ret = -EIO;
170                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
171                         break;
172                 }
173         }
174
175         priv->alloc_rxb_skb--;
176         dev_kfree_skb_any(cmd.reply_skb);
177
178         return ret;
179 }
180 EXPORT_SYMBOL(iwl_send_add_sta);
181
182 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
183                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
184 {
185         __le32 sta_flags;
186         u8 mimo_ps_mode;
187
188         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
189                 goto done;
190
191         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
192
193         sta_flags = priv->stations[index].sta.station_flags;
194
195         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
196
197         switch (mimo_ps_mode) {
198         case WLAN_HT_CAP_SM_PS_STATIC:
199                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
200                 break;
201         case WLAN_HT_CAP_SM_PS_DYNAMIC:
202                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
203                 break;
204         case WLAN_HT_CAP_SM_PS_DISABLED:
205                 break;
206         default:
207                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
208                 break;
209         }
210
211         sta_flags |= cpu_to_le32(
212               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
213
214         sta_flags |= cpu_to_le32(
215               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
216
217         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
218                 sta_flags |= STA_FLG_FAT_EN_MSK;
219         else
220                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
221
222         priv->stations[index].sta.station_flags = sta_flags;
223  done:
224         return;
225 }
226
227 /**
228  * iwl_add_station - Add station to tables in driver and device
229  */
230 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap, u8 flags,
231                 struct ieee80211_sta_ht_cap *ht_info)
232 {
233         struct iwl_station_entry *station;
234         unsigned long flags_spin;
235         int i;
236         int sta_id = IWL_INVALID_STATION;
237         u16 rate;
238
239         spin_lock_irqsave(&priv->sta_lock, flags_spin);
240         if (is_ap)
241                 sta_id = IWL_AP_ID;
242         else if (is_broadcast_ether_addr(addr))
243                 sta_id = priv->hw_params.bcast_sta_id;
244         else
245                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
246                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
247                                                 addr)) {
248                                 sta_id = i;
249                                 break;
250                         }
251
252                         if (!priv->stations[i].used &&
253                             sta_id == IWL_INVALID_STATION)
254                                 sta_id = i;
255                 }
256
257         /* These two conditions have the same outcome, but keep them separate
258            since they have different meanings */
259         if (unlikely(sta_id == IWL_INVALID_STATION)) {
260                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
261                 return sta_id;
262         }
263
264         if (priv->stations[sta_id].used &&
265             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
266                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
267                 return sta_id;
268         }
269
270
271         station = &priv->stations[sta_id];
272         station->used = IWL_STA_DRIVER_ACTIVE;
273         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
274                         sta_id, addr);
275         priv->num_stations++;
276
277         /* Set up the REPLY_ADD_STA command to send to device */
278         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
279         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
280         station->sta.mode = 0;
281         station->sta.sta.sta_id = sta_id;
282         station->sta.station_flags = 0;
283
284         /* BCAST station and IBSS stations do not work in HT mode */
285         if (sta_id != priv->hw_params.bcast_sta_id &&
286             priv->iw_mode != NL80211_IFTYPE_ADHOC)
287                 iwl_set_ht_add_station(priv, sta_id, ht_info);
288
289         /* 3945 only */
290         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
291                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
292         /* Turn on both antennas for the station... */
293         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
294
295         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
296
297         /* Add station to device's station table */
298         iwl_send_add_sta(priv, &station->sta, flags);
299         return sta_id;
300
301 }
302 EXPORT_SYMBOL(iwl_add_station);
303
304 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
305 {
306         unsigned long flags;
307         u8 sta_id = iwl_find_station(priv, addr);
308
309         BUG_ON(sta_id == IWL_INVALID_STATION);
310
311         IWL_DEBUG_ASSOC(priv, "Removed STA from Ucode: %pM\n", addr);
312
313         spin_lock_irqsave(&priv->sta_lock, flags);
314
315         /* Ucode must be active and driver must be non active */
316         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
317                 IWL_ERR(priv, "removed non active STA %d\n", sta_id);
318
319         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
320
321         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
322         spin_unlock_irqrestore(&priv->sta_lock, flags);
323 }
324
325 static void iwl_remove_sta_callback(struct iwl_priv *priv,
326                                     struct iwl_device_cmd *cmd,
327                                     struct sk_buff *skb)
328 {
329         struct iwl_rx_packet *res = NULL;
330         struct iwl_rem_sta_cmd *rm_sta =
331                  (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
332         const char *addr = rm_sta->addr;
333
334         if (!skb) {
335                 IWL_ERR(priv, "Error: Response NULL in REPLY_REMOVE_STA.\n");
336                 return;
337         }
338
339         res = (struct iwl_rx_packet *)skb->data;
340         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
341                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
342                 res->hdr.flags);
343                 return;
344         }
345
346         switch (res->u.rem_sta.status) {
347         case REM_STA_SUCCESS_MSK:
348                 iwl_sta_ucode_deactivate(priv, addr);
349                 break;
350         default:
351                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
352                 break;
353         }
354 }
355
356 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
357                                    u8 flags)
358 {
359         struct iwl_rx_packet *res = NULL;
360         int ret;
361
362         struct iwl_rem_sta_cmd rm_sta_cmd;
363
364         struct iwl_host_cmd cmd = {
365                 .id = REPLY_REMOVE_STA,
366                 .len = sizeof(struct iwl_rem_sta_cmd),
367                 .flags = flags,
368                 .data = &rm_sta_cmd,
369         };
370
371         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
372         rm_sta_cmd.num_sta = 1;
373         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
374
375         if (flags & CMD_ASYNC)
376                 cmd.callback = iwl_remove_sta_callback;
377         else
378                 cmd.flags |= CMD_WANT_SKB;
379         ret = iwl_send_cmd(priv, &cmd);
380
381         if (ret || (flags & CMD_ASYNC))
382                 return ret;
383
384         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
385         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
386                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
387                           res->hdr.flags);
388                 ret = -EIO;
389         }
390
391         if (!ret) {
392                 switch (res->u.rem_sta.status) {
393                 case REM_STA_SUCCESS_MSK:
394                         iwl_sta_ucode_deactivate(priv, addr);
395                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
396                         break;
397                 default:
398                         ret = -EIO;
399                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
400                         break;
401                 }
402         }
403
404         priv->alloc_rxb_skb--;
405         dev_kfree_skb_any(cmd.reply_skb);
406
407         return ret;
408 }
409
410 /**
411  * iwl_remove_station - Remove driver's knowledge of station.
412  */
413 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
414 {
415         int sta_id = IWL_INVALID_STATION;
416         int i, ret = -EINVAL;
417         unsigned long flags;
418
419         spin_lock_irqsave(&priv->sta_lock, flags);
420
421         if (is_ap)
422                 sta_id = IWL_AP_ID;
423         else if (is_broadcast_ether_addr(addr))
424                 sta_id = priv->hw_params.bcast_sta_id;
425         else
426                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
427                         if (priv->stations[i].used &&
428                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
429                                                 addr)) {
430                                 sta_id = i;
431                                 break;
432                         }
433
434         if (unlikely(sta_id == IWL_INVALID_STATION))
435                 goto out;
436
437         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
438                 sta_id, addr);
439
440         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
441                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
442                                 addr);
443                 goto out;
444         }
445
446         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
447                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
448                                 addr);
449                 goto out;
450         }
451
452
453         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
454
455         priv->num_stations--;
456
457         BUG_ON(priv->num_stations < 0);
458
459         spin_unlock_irqrestore(&priv->sta_lock, flags);
460
461         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
462         return ret;
463 out:
464         spin_unlock_irqrestore(&priv->sta_lock, flags);
465         return ret;
466 }
467 EXPORT_SYMBOL(iwl_remove_station);
468
469 /**
470  * iwl_clear_stations_table - Clear the driver's station table
471  *
472  * NOTE:  This does not clear or otherwise alter the device's station table.
473  */
474 void iwl_clear_stations_table(struct iwl_priv *priv)
475 {
476         unsigned long flags;
477         int i;
478
479         spin_lock_irqsave(&priv->sta_lock, flags);
480
481         if (iwl_is_alive(priv) &&
482            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
483            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
484                 IWL_ERR(priv, "Couldn't clear the station table\n");
485
486         priv->num_stations = 0;
487         memset(priv->stations, 0, sizeof(priv->stations));
488
489         /* clean ucode key table bit map */
490         priv->ucode_key_table = 0;
491
492         /* keep track of static keys */
493         for (i = 0; i < WEP_KEYS_MAX ; i++) {
494                 if (priv->wep_keys[i].key_size)
495                         set_bit(i, &priv->ucode_key_table);
496         }
497
498         spin_unlock_irqrestore(&priv->sta_lock, flags);
499 }
500 EXPORT_SYMBOL(iwl_clear_stations_table);
501
502 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
503 {
504         int i;
505
506         for (i = 0; i < STA_KEY_MAX_NUM; i++)
507                 if (!test_and_set_bit(i, &priv->ucode_key_table))
508                         return i;
509
510         return WEP_INVALID_OFFSET;
511 }
512 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
513
514 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
515 {
516         int i, not_empty = 0;
517         u8 buff[sizeof(struct iwl_wep_cmd) +
518                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
519         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
520         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
521         struct iwl_host_cmd cmd = {
522                 .id = REPLY_WEPKEY,
523                 .data = wep_cmd,
524                 .flags = CMD_ASYNC,
525         };
526
527         memset(wep_cmd, 0, cmd_size +
528                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
529
530         for (i = 0; i < WEP_KEYS_MAX ; i++) {
531                 wep_cmd->key[i].key_index = i;
532                 if (priv->wep_keys[i].key_size) {
533                         wep_cmd->key[i].key_offset = i;
534                         not_empty = 1;
535                 } else {
536                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
537                 }
538
539                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
540                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
541                                 priv->wep_keys[i].key_size);
542         }
543
544         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
545         wep_cmd->num_keys = WEP_KEYS_MAX;
546
547         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
548
549         cmd.len = cmd_size;
550
551         if (not_empty || send_if_empty)
552                 return iwl_send_cmd(priv, &cmd);
553         else
554                 return 0;
555 }
556 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
557
558 int iwl_remove_default_wep_key(struct iwl_priv *priv,
559                                struct ieee80211_key_conf *keyconf)
560 {
561         int ret;
562         unsigned long flags;
563
564         spin_lock_irqsave(&priv->sta_lock, flags);
565         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
566                       keyconf->keyidx);
567
568         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
569                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
570                           keyconf->keyidx);
571
572         priv->default_wep_key--;
573         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
574         if (iwl_is_rfkill(priv)) {
575                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
576                 spin_unlock_irqrestore(&priv->sta_lock, flags);
577                 return 0;
578         }
579         ret = iwl_send_static_wepkey_cmd(priv, 1);
580         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
581                       keyconf->keyidx, ret);
582         spin_unlock_irqrestore(&priv->sta_lock, flags);
583
584         return ret;
585 }
586 EXPORT_SYMBOL(iwl_remove_default_wep_key);
587
588 int iwl_set_default_wep_key(struct iwl_priv *priv,
589                             struct ieee80211_key_conf *keyconf)
590 {
591         int ret;
592         unsigned long flags;
593
594         if (keyconf->keylen != WEP_KEY_LEN_128 &&
595             keyconf->keylen != WEP_KEY_LEN_64) {
596                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
597                 return -EINVAL;
598         }
599
600         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
601         keyconf->hw_key_idx = HW_KEY_DEFAULT;
602         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
603
604         spin_lock_irqsave(&priv->sta_lock, flags);
605         priv->default_wep_key++;
606
607         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
608                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
609                         keyconf->keyidx);
610
611         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
612         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
613                                                         keyconf->keylen);
614
615         ret = iwl_send_static_wepkey_cmd(priv, 0);
616         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
617                 keyconf->keylen, keyconf->keyidx, ret);
618         spin_unlock_irqrestore(&priv->sta_lock, flags);
619
620         return ret;
621 }
622 EXPORT_SYMBOL(iwl_set_default_wep_key);
623
624 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
625                                 struct ieee80211_key_conf *keyconf,
626                                 u8 sta_id)
627 {
628         unsigned long flags;
629         __le16 key_flags = 0;
630         int ret;
631
632         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
633
634         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
635         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
636         key_flags &= ~STA_KEY_FLG_INVALID;
637
638         if (keyconf->keylen == WEP_KEY_LEN_128)
639                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
640
641         if (sta_id == priv->hw_params.bcast_sta_id)
642                 key_flags |= STA_KEY_MULTICAST_MSK;
643
644         spin_lock_irqsave(&priv->sta_lock, flags);
645
646         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
647         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
648         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
649
650         memcpy(priv->stations[sta_id].keyinfo.key,
651                                 keyconf->key, keyconf->keylen);
652
653         memcpy(&priv->stations[sta_id].sta.key.key[3],
654                                 keyconf->key, keyconf->keylen);
655
656         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
657                         == STA_KEY_FLG_NO_ENC)
658                 priv->stations[sta_id].sta.key.key_offset =
659                                  iwl_get_free_ucode_key_index(priv);
660         /* else, we are overriding an existing key => no need to allocated room
661          * in uCode. */
662
663         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
664                 "no space for a new key");
665
666         priv->stations[sta_id].sta.key.key_flags = key_flags;
667         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
668         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
669
670         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
671
672         spin_unlock_irqrestore(&priv->sta_lock, flags);
673
674         return ret;
675 }
676
677 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
678                                    struct ieee80211_key_conf *keyconf,
679                                    u8 sta_id)
680 {
681         unsigned long flags;
682         __le16 key_flags = 0;
683         int ret;
684
685         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
686         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
687         key_flags &= ~STA_KEY_FLG_INVALID;
688
689         if (sta_id == priv->hw_params.bcast_sta_id)
690                 key_flags |= STA_KEY_MULTICAST_MSK;
691
692         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
693
694         spin_lock_irqsave(&priv->sta_lock, flags);
695         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
696         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
697
698         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
699                keyconf->keylen);
700
701         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
702                keyconf->keylen);
703
704         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
705                         == STA_KEY_FLG_NO_ENC)
706                 priv->stations[sta_id].sta.key.key_offset =
707                                  iwl_get_free_ucode_key_index(priv);
708         /* else, we are overriding an existing key => no need to allocated room
709          * in uCode. */
710
711         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
712                 "no space for a new key");
713
714         priv->stations[sta_id].sta.key.key_flags = key_flags;
715         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
716         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
717
718         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
719
720         spin_unlock_irqrestore(&priv->sta_lock, flags);
721
722         return ret;
723 }
724
725 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
726                                    struct ieee80211_key_conf *keyconf,
727                                    u8 sta_id)
728 {
729         unsigned long flags;
730         int ret = 0;
731         __le16 key_flags = 0;
732
733         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
734         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
735         key_flags &= ~STA_KEY_FLG_INVALID;
736
737         if (sta_id == priv->hw_params.bcast_sta_id)
738                 key_flags |= STA_KEY_MULTICAST_MSK;
739
740         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
741         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
742
743         spin_lock_irqsave(&priv->sta_lock, flags);
744
745         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
746         priv->stations[sta_id].keyinfo.keylen = 16;
747
748         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
749                         == STA_KEY_FLG_NO_ENC)
750                 priv->stations[sta_id].sta.key.key_offset =
751                                  iwl_get_free_ucode_key_index(priv);
752         /* else, we are overriding an existing key => no need to allocated room
753          * in uCode. */
754
755         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
756                 "no space for a new key");
757
758         priv->stations[sta_id].sta.key.key_flags = key_flags;
759
760
761         /* This copy is acutally not needed: we get the key with each TX */
762         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
763
764         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
765
766         spin_unlock_irqrestore(&priv->sta_lock, flags);
767
768         return ret;
769 }
770
771 void iwl_update_tkip_key(struct iwl_priv *priv,
772                         struct ieee80211_key_conf *keyconf,
773                         const u8 *addr, u32 iv32, u16 *phase1key)
774 {
775         u8 sta_id = IWL_INVALID_STATION;
776         unsigned long flags;
777         int i;
778
779         sta_id = iwl_find_station(priv, addr);
780         if (sta_id == IWL_INVALID_STATION) {
781                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
782                                    addr);
783                 return;
784         }
785
786         if (iwl_scan_cancel(priv)) {
787                 /* cancel scan failed, just live w/ bad key and rely
788                    briefly on SW decryption */
789                 return;
790         }
791
792         spin_lock_irqsave(&priv->sta_lock, flags);
793
794         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
795
796         for (i = 0; i < 5; i++)
797                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
798                         cpu_to_le16(phase1key[i]);
799
800         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
801         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
802
803         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
804
805         spin_unlock_irqrestore(&priv->sta_lock, flags);
806
807 }
808 EXPORT_SYMBOL(iwl_update_tkip_key);
809
810 int iwl_remove_dynamic_key(struct iwl_priv *priv,
811                                 struct ieee80211_key_conf *keyconf,
812                                 u8 sta_id)
813 {
814         unsigned long flags;
815         int ret = 0;
816         u16 key_flags;
817         u8 keyidx;
818
819         priv->key_mapping_key--;
820
821         spin_lock_irqsave(&priv->sta_lock, flags);
822         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
823         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
824
825         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
826                       keyconf->keyidx, sta_id);
827
828         if (keyconf->keyidx != keyidx) {
829                 /* We need to remove a key with index different that the one
830                  * in the uCode. This means that the key we need to remove has
831                  * been replaced by another one with different index.
832                  * Don't do anything and return ok
833                  */
834                 spin_unlock_irqrestore(&priv->sta_lock, flags);
835                 return 0;
836         }
837
838         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
839                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
840                             keyconf->keyidx, key_flags);
841                 spin_unlock_irqrestore(&priv->sta_lock, flags);
842                 return 0;
843         }
844
845         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
846                 &priv->ucode_key_table))
847                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
848                         priv->stations[sta_id].sta.key.key_offset);
849         memset(&priv->stations[sta_id].keyinfo, 0,
850                                         sizeof(struct iwl_hw_key));
851         memset(&priv->stations[sta_id].sta.key, 0,
852                                         sizeof(struct iwl4965_keyinfo));
853         priv->stations[sta_id].sta.key.key_flags =
854                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
855         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
856         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
857         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
858
859         if (iwl_is_rfkill(priv)) {
860                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled. \n");
861                 spin_unlock_irqrestore(&priv->sta_lock, flags);
862                 return 0;
863         }
864         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
865         spin_unlock_irqrestore(&priv->sta_lock, flags);
866         return ret;
867 }
868 EXPORT_SYMBOL(iwl_remove_dynamic_key);
869
870 int iwl_set_dynamic_key(struct iwl_priv *priv,
871                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
872 {
873         int ret;
874
875         priv->key_mapping_key++;
876         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
877
878         switch (keyconf->alg) {
879         case ALG_CCMP:
880                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
881                 break;
882         case ALG_TKIP:
883                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
884                 break;
885         case ALG_WEP:
886                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
887                 break;
888         default:
889                 IWL_ERR(priv,
890                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
891                 ret = -EINVAL;
892         }
893
894         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
895                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
896                       sta_id, ret);
897
898         return ret;
899 }
900 EXPORT_SYMBOL(iwl_set_dynamic_key);
901
902 #ifdef CONFIG_IWLWIFI_DEBUG
903 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
904                            struct iwl_link_quality_cmd *lq)
905 {
906         int i;
907         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
908         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
909                        lq->general_params.single_stream_ant_msk,
910                        lq->general_params.dual_stream_ant_msk);
911
912         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
913                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
914                                i, lq->rs_table[i].rate_n_flags);
915 }
916 #else
917 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
918                                    struct iwl_link_quality_cmd *lq)
919 {
920 }
921 #endif
922
923 int iwl_send_lq_cmd(struct iwl_priv *priv,
924                     struct iwl_link_quality_cmd *lq, u8 flags)
925 {
926         struct iwl_host_cmd cmd = {
927                 .id = REPLY_TX_LINK_QUALITY_CMD,
928                 .len = sizeof(struct iwl_link_quality_cmd),
929                 .flags = flags,
930                 .data = lq,
931         };
932
933         if ((lq->sta_id == 0xFF) &&
934             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
935                 return -EINVAL;
936
937         if (lq->sta_id == 0xFF)
938                 lq->sta_id = IWL_AP_ID;
939
940         iwl_dump_lq_cmd(priv, lq);
941
942         if (iwl_is_associated(priv) && priv->assoc_station_added)
943                 return  iwl_send_cmd(priv, &cmd);
944
945         return 0;
946 }
947 EXPORT_SYMBOL(iwl_send_lq_cmd);
948
949 /**
950  * iwl_sta_init_lq - Initialize a station's hardware rate table
951  *
952  * The uCode's station table contains a table of fallback rates
953  * for automatic fallback during transmission.
954  *
955  * NOTE: This sets up a default set of values.  These will be replaced later
956  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
957  *       rc80211_simple.
958  *
959  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
960  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
961  *       which requires station table entry to exist).
962  */
963 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
964 {
965         int i, r;
966         struct iwl_link_quality_cmd link_cmd = {
967                 .reserved1 = 0,
968         };
969         u32 rate_flags;
970
971         /* Set up the rate scaling to start at selected rate, fall back
972          * all the way down to 1M in IEEE order, and then spin on 1M */
973         if (is_ap)
974                 r = IWL_RATE_54M_INDEX;
975         else if (priv->band == IEEE80211_BAND_5GHZ)
976                 r = IWL_RATE_6M_INDEX;
977         else
978                 r = IWL_RATE_1M_INDEX;
979
980         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
981                 rate_flags = 0;
982                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
983                         rate_flags |= RATE_MCS_CCK_MSK;
984
985                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
986                                 RATE_MCS_ANT_POS;
987
988                 link_cmd.rs_table[i].rate_n_flags =
989                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
990                 r = iwl_get_prev_ieee_rate(r);
991         }
992
993         link_cmd.general_params.single_stream_ant_msk =
994                                 first_antenna(priv->hw_params.valid_tx_ant);
995         link_cmd.general_params.dual_stream_ant_msk = 3;
996         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
997         link_cmd.agg_params.agg_time_limit =
998                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
999
1000         /* Update the rate scaling for control frame Tx to AP */
1001         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
1002
1003         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
1004                                sizeof(link_cmd), &link_cmd, NULL);
1005 }
1006
1007 /**
1008  * iwl_rxon_add_station - add station into station table.
1009  *
1010  * there is only one AP station with id= IWL_AP_ID
1011  * NOTE: mutex must be held before calling this function
1012  */
1013 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
1014 {
1015         struct ieee80211_sta *sta;
1016         struct ieee80211_sta_ht_cap ht_config;
1017         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
1018         u8 sta_id;
1019
1020         /* Add station to device's station table */
1021
1022         /*
1023          * XXX: This check is definitely not correct, if we're an AP
1024          *      it'll always be false which is not what we want, but
1025          *      it doesn't look like iwlagn is prepared to be an HT
1026          *      AP anyway.
1027          */
1028         if (priv->current_ht_config.is_ht) {
1029                 rcu_read_lock();
1030                 sta = ieee80211_find_sta(priv->hw, addr);
1031                 if (sta) {
1032                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1033                         cur_ht_config = &ht_config;
1034                 }
1035                 rcu_read_unlock();
1036         }
1037
1038         sta_id = iwl_add_station(priv, addr, is_ap, CMD_SYNC, cur_ht_config);
1039
1040         /* Set up default rate scaling table in device's station table */
1041         iwl_sta_init_lq(priv, addr, is_ap);
1042
1043         return sta_id;
1044 }
1045 EXPORT_SYMBOL(iwl_rxon_add_station);
1046
1047 /**
1048  * iwl_get_sta_id - Find station's index within station table
1049  *
1050  * If new IBSS station, create new entry in station table
1051  */
1052 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1053 {
1054         int sta_id;
1055         __le16 fc = hdr->frame_control;
1056
1057         /* If this frame is broadcast or management, use broadcast station id */
1058         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1059                 return priv->hw_params.bcast_sta_id;
1060
1061         switch (priv->iw_mode) {
1062
1063         /* If we are a client station in a BSS network, use the special
1064          * AP station entry (that's the only station we communicate with) */
1065         case NL80211_IFTYPE_STATION:
1066                 return IWL_AP_ID;
1067
1068         /* If we are an AP, then find the station, or use BCAST */
1069         case NL80211_IFTYPE_AP:
1070                 sta_id = iwl_find_station(priv, hdr->addr1);
1071                 if (sta_id != IWL_INVALID_STATION)
1072                         return sta_id;
1073                 return priv->hw_params.bcast_sta_id;
1074
1075         /* If this frame is going out to an IBSS network, find the station,
1076          * or create a new station table entry */
1077         case NL80211_IFTYPE_ADHOC:
1078                 sta_id = iwl_find_station(priv, hdr->addr1);
1079                 if (sta_id != IWL_INVALID_STATION)
1080                         return sta_id;
1081
1082                 /* Create new station table entry */
1083                 sta_id = iwl_add_station(priv, hdr->addr1, false,
1084                                         CMD_ASYNC, NULL);
1085
1086                 if (sta_id != IWL_INVALID_STATION)
1087                         return sta_id;
1088
1089                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1090                                "Defaulting to broadcast...\n",
1091                                hdr->addr1);
1092                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1093                 return priv->hw_params.bcast_sta_id;
1094
1095         default:
1096                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1097                         priv->iw_mode);
1098                 return priv->hw_params.bcast_sta_id;
1099         }
1100 }
1101 EXPORT_SYMBOL(iwl_get_sta_id);
1102
1103 /**
1104  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1105  */
1106 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1107 {
1108         unsigned long flags;
1109
1110         /* Remove "disable" flag, to enable Tx for this TID */
1111         spin_lock_irqsave(&priv->sta_lock, flags);
1112         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1113         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1114         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1115         spin_unlock_irqrestore(&priv->sta_lock, flags);
1116
1117         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1118 }
1119 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1120
1121 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1122                          const u8 *addr, int tid, u16 ssn)
1123 {
1124         unsigned long flags;
1125         int sta_id;
1126
1127         sta_id = iwl_find_station(priv, addr);
1128         if (sta_id == IWL_INVALID_STATION)
1129                 return -ENXIO;
1130
1131         spin_lock_irqsave(&priv->sta_lock, flags);
1132         priv->stations[sta_id].sta.station_flags_msk = 0;
1133         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1134         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1135         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1136         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1137         spin_unlock_irqrestore(&priv->sta_lock, flags);
1138
1139         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1140                                         CMD_ASYNC);
1141 }
1142 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1143
1144 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1145 {
1146         unsigned long flags;
1147         int sta_id;
1148
1149         sta_id = iwl_find_station(priv, addr);
1150         if (sta_id == IWL_INVALID_STATION) {
1151                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1152                 return -ENXIO;
1153         }
1154
1155         spin_lock_irqsave(&priv->sta_lock, flags);
1156         priv->stations[sta_id].sta.station_flags_msk = 0;
1157         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1158         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1159         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1160         spin_unlock_irqrestore(&priv->sta_lock, flags);
1161
1162         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1163                                         CMD_ASYNC);
1164 }
1165 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1166
1167 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1168 {
1169         unsigned long flags;
1170
1171         spin_lock_irqsave(&priv->sta_lock, flags);
1172         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1173         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1174         priv->stations[sta_id].sta.sta.modify_mask = 0;
1175         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1176         spin_unlock_irqrestore(&priv->sta_lock, flags);
1177
1178         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1179 }
1180
1181 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1182 {
1183         /* FIXME: need locking over ps_status ??? */
1184         u8 sta_id = iwl_find_station(priv, addr);
1185
1186         if (sta_id != IWL_INVALID_STATION) {
1187                 u8 sta_awake = priv->stations[sta_id].
1188                                 ps_status == STA_PS_STATUS_WAKE;
1189
1190                 if (sta_awake && ps_bit)
1191                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1192                 else if (!sta_awake && !ps_bit) {
1193                         iwl_sta_modify_ps_wake(priv, sta_id);
1194                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1195                 }
1196         }
1197 }
1198