b9b8554433a6da0ae4fcdacbc7ea7ac20fadfcfb
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl-sta.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
4  *
5  * Portions of this file are derived from the ipw3945 project, as well
6  * as portions of the ieee80211 subsystem header files.
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of version 2 of the GNU General Public License as
10  * published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along with
18  * this program; if not, write to the Free Software Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20  *
21  * The full GNU General Public License is included in this distribution in the
22  * file called LICENSE.
23  *
24  * Contact Information:
25  * James P. Ketrenos <ipw2100-admin@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 #include "iwl-helpers.h"
37
38
39 #define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
40 #define IWL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
41
42 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
43 {
44         int i;
45         int start = 0;
46         int ret = IWL_INVALID_STATION;
47         unsigned long flags;
48
49         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
50             (priv->iw_mode == NL80211_IFTYPE_AP))
51                 start = IWL_STA_ID;
52
53         if (is_broadcast_ether_addr(addr))
54                 return priv->hw_params.bcast_sta_id;
55
56         spin_lock_irqsave(&priv->sta_lock, flags);
57         for (i = start; i < priv->hw_params.max_stations; i++)
58                 if (priv->stations[i].used &&
59                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
60                                          addr))) {
61                         ret = i;
62                         goto out;
63                 }
64
65         IWL_DEBUG_ASSOC_LIMIT("can not find STA %pM total %d\n",
66                               addr, priv->num_stations);
67
68  out:
69         spin_unlock_irqrestore(&priv->sta_lock, flags);
70         return ret;
71 }
72 EXPORT_SYMBOL(iwl_find_station);
73
74 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
75 {
76         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
77                 return IWL_AP_ID;
78         } else {
79                 u8 *da = ieee80211_get_DA(hdr);
80                 return iwl_find_station(priv, da);
81         }
82 }
83 EXPORT_SYMBOL(iwl_get_ra_sta_id);
84
85 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
86 {
87         unsigned long flags;
88
89         spin_lock_irqsave(&priv->sta_lock, flags);
90
91         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
92                 IWL_ERROR("ACTIVATE a non DRIVER active station %d\n", sta_id);
93
94         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
95         IWL_DEBUG_ASSOC("Added STA to Ucode: %pM\n",
96                         priv->stations[sta_id].sta.sta.addr);
97
98         spin_unlock_irqrestore(&priv->sta_lock, flags);
99 }
100
101 static int iwl_add_sta_callback(struct iwl_priv *priv,
102                                    struct iwl_cmd *cmd, struct sk_buff *skb)
103 {
104         struct iwl_rx_packet *res = NULL;
105         u8 sta_id = cmd->cmd.addsta.sta.sta_id;
106
107         if (!skb) {
108                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
109                 return 1;
110         }
111
112         res = (struct iwl_rx_packet *)skb->data;
113         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
114                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
115                           res->hdr.flags);
116                 return 1;
117         }
118
119         switch (res->u.add_sta.status) {
120         case ADD_STA_SUCCESS_MSK:
121                 iwl_sta_ucode_activate(priv, sta_id);
122                  /* fall through */
123         default:
124                 IWL_DEBUG_HC("Received REPLY_ADD_STA:(0x%08X)\n",
125                              res->u.add_sta.status);
126                 break;
127         }
128
129         /* We didn't cache the SKB; let the caller free it */
130         return 1;
131 }
132
133 int iwl_send_add_sta(struct iwl_priv *priv,
134                      struct iwl_addsta_cmd *sta, u8 flags)
135 {
136         struct iwl_rx_packet *res = NULL;
137         int ret = 0;
138         u8 data[sizeof(*sta)];
139         struct iwl_host_cmd cmd = {
140                 .id = REPLY_ADD_STA,
141                 .meta.flags = flags,
142                 .data = data,
143         };
144
145         if (flags & CMD_ASYNC)
146                 cmd.meta.u.callback = iwl_add_sta_callback;
147         else
148                 cmd.meta.flags |= CMD_WANT_SKB;
149
150         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
151         ret = iwl_send_cmd(priv, &cmd);
152
153         if (ret || (flags & CMD_ASYNC))
154                 return ret;
155
156         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
157         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
158                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
159                           res->hdr.flags);
160                 ret = -EIO;
161         }
162
163         if (ret == 0) {
164                 switch (res->u.add_sta.status) {
165                 case ADD_STA_SUCCESS_MSK:
166                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
167                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
168                         break;
169                 default:
170                         ret = -EIO;
171                         IWL_WARNING("REPLY_ADD_STA failed\n");
172                         break;
173                 }
174         }
175
176         priv->alloc_rxb_skb--;
177         dev_kfree_skb_any(cmd.meta.u.skb);
178
179         return ret;
180 }
181 EXPORT_SYMBOL(iwl_send_add_sta);
182
183 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
184                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
185 {
186         __le32 sta_flags;
187         u8 mimo_ps_mode;
188
189         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
190                 goto done;
191
192         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
193
194         sta_flags = priv->stations[index].sta.station_flags;
195
196         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
197
198         switch (mimo_ps_mode) {
199         case WLAN_HT_CAP_SM_PS_STATIC:
200                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
201                 break;
202         case WLAN_HT_CAP_SM_PS_DYNAMIC:
203                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
204                 break;
205         case WLAN_HT_CAP_SM_PS_DISABLED:
206                 break;
207         default:
208                 IWL_WARNING("Invalid MIMO PS mode %d\n", mimo_ps_mode);
209                 break;
210         }
211
212         sta_flags |= cpu_to_le32(
213               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
214
215         sta_flags |= cpu_to_le32(
216               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
217
218         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
219                 sta_flags |= STA_FLG_FAT_EN_MSK;
220         else
221                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
222
223         priv->stations[index].sta.station_flags = sta_flags;
224  done:
225         return;
226 }
227
228 /**
229  * iwl_add_station_flags - Add station to tables in driver and device
230  */
231 u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
232                          u8 flags, struct ieee80211_sta_ht_cap *ht_info)
233 {
234         int i;
235         int sta_id = IWL_INVALID_STATION;
236         struct iwl_station_entry *station;
237         unsigned long flags_spin;
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("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         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
290
291         /* Add station to device's station table */
292         iwl_send_add_sta(priv, &station->sta, flags);
293         return sta_id;
294
295 }
296 EXPORT_SYMBOL(iwl_add_station_flags);
297
298 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
299 {
300         unsigned long flags;
301         u8 sta_id = iwl_find_station(priv, addr);
302
303         BUG_ON(sta_id == IWL_INVALID_STATION);
304
305         IWL_DEBUG_ASSOC("Removed STA from Ucode: %pM\n", addr);
306
307         spin_lock_irqsave(&priv->sta_lock, flags);
308
309         /* Ucode must be active and driver must be non active */
310         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
311                 IWL_ERROR("removed non active STA %d\n", sta_id);
312
313         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
314
315         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
316         spin_unlock_irqrestore(&priv->sta_lock, flags);
317 }
318
319 static int iwl_remove_sta_callback(struct iwl_priv *priv,
320                                    struct iwl_cmd *cmd, struct sk_buff *skb)
321 {
322         struct iwl_rx_packet *res = NULL;
323         const char *addr = cmd->cmd.rm_sta.addr;
324
325         if (!skb) {
326                 IWL_ERROR("Error: Response NULL in REPLY_REMOVE_STA.\n");
327                 return 1;
328         }
329
330         res = (struct iwl_rx_packet *)skb->data;
331         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
332                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
333                 res->hdr.flags);
334                 return 1;
335         }
336
337         switch (res->u.rem_sta.status) {
338         case REM_STA_SUCCESS_MSK:
339                 iwl_sta_ucode_deactivate(priv, addr);
340                 break;
341         default:
342                 IWL_ERROR("REPLY_REMOVE_STA failed\n");
343                 break;
344         }
345
346         /* We didn't cache the SKB; let the caller free it */
347         return 1;
348 }
349
350 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
351                                    u8 flags)
352 {
353         struct iwl_rx_packet *res = NULL;
354         int ret;
355
356         struct iwl_rem_sta_cmd rm_sta_cmd;
357
358         struct iwl_host_cmd cmd = {
359                 .id = REPLY_REMOVE_STA,
360                 .len = sizeof(struct iwl_rem_sta_cmd),
361                 .meta.flags = flags,
362                 .data = &rm_sta_cmd,
363         };
364
365         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
366         rm_sta_cmd.num_sta = 1;
367         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
368
369         if (flags & CMD_ASYNC)
370                 cmd.meta.u.callback = iwl_remove_sta_callback;
371         else
372                 cmd.meta.flags |= CMD_WANT_SKB;
373         ret = iwl_send_cmd(priv, &cmd);
374
375         if (ret || (flags & CMD_ASYNC))
376                 return ret;
377
378         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
379         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
380                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
381                           res->hdr.flags);
382                 ret = -EIO;
383         }
384
385         if (!ret) {
386                 switch (res->u.rem_sta.status) {
387                 case REM_STA_SUCCESS_MSK:
388                         iwl_sta_ucode_deactivate(priv, addr);
389                         IWL_DEBUG_ASSOC("REPLY_REMOVE_STA PASSED\n");
390                         break;
391                 default:
392                         ret = -EIO;
393                         IWL_ERROR("REPLY_REMOVE_STA failed\n");
394                         break;
395                 }
396         }
397
398         priv->alloc_rxb_skb--;
399         dev_kfree_skb_any(cmd.meta.u.skb);
400
401         return ret;
402 }
403
404 /**
405  * iwl_remove_station - Remove driver's knowledge of station.
406  */
407 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
408 {
409         int sta_id = IWL_INVALID_STATION;
410         int i, ret = -EINVAL;
411         unsigned long flags;
412
413         spin_lock_irqsave(&priv->sta_lock, flags);
414
415         if (is_ap)
416                 sta_id = IWL_AP_ID;
417         else if (is_broadcast_ether_addr(addr))
418                 sta_id = priv->hw_params.bcast_sta_id;
419         else
420                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
421                         if (priv->stations[i].used &&
422                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
423                                                 addr)) {
424                                 sta_id = i;
425                                 break;
426                         }
427
428         if (unlikely(sta_id == IWL_INVALID_STATION))
429                 goto out;
430
431         IWL_DEBUG_ASSOC("Removing STA from driver:%d  %pM\n",
432                 sta_id, addr);
433
434         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
435                 IWL_ERROR("Removing %pM but non DRIVER active\n",
436                                 addr);
437                 goto out;
438         }
439
440         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
441                 IWL_ERROR("Removing %pM but non UCODE active\n",
442                                 addr);
443                 goto out;
444         }
445
446
447         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
448
449         priv->num_stations--;
450
451         BUG_ON(priv->num_stations < 0);
452
453         spin_unlock_irqrestore(&priv->sta_lock, flags);
454
455         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
456         return ret;
457 out:
458         spin_unlock_irqrestore(&priv->sta_lock, flags);
459         return ret;
460 }
461 EXPORT_SYMBOL(iwl_remove_station);
462
463 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
464 {
465         int i;
466
467         for (i = 0; i < STA_KEY_MAX_NUM; i++)
468                 if (!test_and_set_bit(i, &priv->ucode_key_table))
469                         return i;
470
471         return -1;
472 }
473
474 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
475 {
476         int i, not_empty = 0;
477         u8 buff[sizeof(struct iwl_wep_cmd) +
478                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
479         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
480         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
481         struct iwl_host_cmd cmd = {
482                 .id = REPLY_WEPKEY,
483                 .data = wep_cmd,
484                 .meta.flags = CMD_ASYNC,
485         };
486
487         memset(wep_cmd, 0, cmd_size +
488                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
489
490         for (i = 0; i < WEP_KEYS_MAX ; i++) {
491                 wep_cmd->key[i].key_index = i;
492                 if (priv->wep_keys[i].key_size) {
493                         wep_cmd->key[i].key_offset = i;
494                         not_empty = 1;
495                 } else {
496                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
497                 }
498
499                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
500                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
501                                 priv->wep_keys[i].key_size);
502         }
503
504         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
505         wep_cmd->num_keys = WEP_KEYS_MAX;
506
507         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
508
509         cmd.len = cmd_size;
510
511         if (not_empty || send_if_empty)
512                 return iwl_send_cmd(priv, &cmd);
513         else
514                 return 0;
515 }
516 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
517
518 int iwl_remove_default_wep_key(struct iwl_priv *priv,
519                                struct ieee80211_key_conf *keyconf)
520 {
521         int ret;
522         unsigned long flags;
523
524         spin_lock_irqsave(&priv->sta_lock, flags);
525
526         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
527                 IWL_ERROR("index %d not used in uCode key table.\n",
528                           keyconf->keyidx);
529
530         priv->default_wep_key--;
531         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
532         ret = iwl_send_static_wepkey_cmd(priv, 1);
533         IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
534                       keyconf->keyidx, ret);
535         spin_unlock_irqrestore(&priv->sta_lock, flags);
536
537         return ret;
538 }
539 EXPORT_SYMBOL(iwl_remove_default_wep_key);
540
541 int iwl_set_default_wep_key(struct iwl_priv *priv,
542                             struct ieee80211_key_conf *keyconf)
543 {
544         int ret;
545         unsigned long flags;
546
547         if (keyconf->keylen != WEP_KEY_LEN_128 &&
548             keyconf->keylen != WEP_KEY_LEN_64) {
549                 IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
550                 return -EINVAL;
551         }
552
553         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
554         keyconf->hw_key_idx = HW_KEY_DEFAULT;
555         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
556
557         spin_lock_irqsave(&priv->sta_lock, flags);
558         priv->default_wep_key++;
559
560         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
561                 IWL_ERROR("index %d already used in uCode key table.\n",
562                         keyconf->keyidx);
563
564         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
565         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
566                                                         keyconf->keylen);
567
568         ret = iwl_send_static_wepkey_cmd(priv, 0);
569         IWL_DEBUG_WEP("Set default WEP key: len=%d idx=%d ret=%d\n",
570                 keyconf->keylen, keyconf->keyidx, ret);
571         spin_unlock_irqrestore(&priv->sta_lock, flags);
572
573         return ret;
574 }
575 EXPORT_SYMBOL(iwl_set_default_wep_key);
576
577 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
578                                 struct ieee80211_key_conf *keyconf,
579                                 u8 sta_id)
580 {
581         unsigned long flags;
582         __le16 key_flags = 0;
583         int ret;
584
585         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
586
587         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
588         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
589         key_flags &= ~STA_KEY_FLG_INVALID;
590
591         if (keyconf->keylen == WEP_KEY_LEN_128)
592                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
593
594         if (sta_id == priv->hw_params.bcast_sta_id)
595                 key_flags |= STA_KEY_MULTICAST_MSK;
596
597         spin_lock_irqsave(&priv->sta_lock, flags);
598
599         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
600         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
601         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
602
603         memcpy(priv->stations[sta_id].keyinfo.key,
604                                 keyconf->key, keyconf->keylen);
605
606         memcpy(&priv->stations[sta_id].sta.key.key[3],
607                                 keyconf->key, keyconf->keylen);
608
609         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
610                         == STA_KEY_FLG_NO_ENC)
611                 priv->stations[sta_id].sta.key.key_offset =
612                                  iwl_get_free_ucode_key_index(priv);
613         /* else, we are overriding an existing key => no need to allocated room
614          * in uCode. */
615
616         priv->stations[sta_id].sta.key.key_flags = key_flags;
617         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
618         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
619
620         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
621
622         spin_unlock_irqrestore(&priv->sta_lock, flags);
623
624         return ret;
625 }
626
627 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
628                                    struct ieee80211_key_conf *keyconf,
629                                    u8 sta_id)
630 {
631         unsigned long flags;
632         __le16 key_flags = 0;
633
634         key_flags |= (STA_KEY_FLG_CCMP | 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 (sta_id == priv->hw_params.bcast_sta_id)
639                 key_flags |= STA_KEY_MULTICAST_MSK;
640
641         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
642
643         spin_lock_irqsave(&priv->sta_lock, flags);
644         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
645         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
646
647         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
648                keyconf->keylen);
649
650         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
651                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         priv->stations[sta_id].sta.key.key_flags = key_flags;
661         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
662         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
663
664         spin_unlock_irqrestore(&priv->sta_lock, flags);
665
666         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
667         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
668 }
669
670 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
671                                    struct ieee80211_key_conf *keyconf,
672                                    u8 sta_id)
673 {
674         unsigned long flags;
675         int ret = 0;
676
677         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
678         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
679
680         spin_lock_irqsave(&priv->sta_lock, flags);
681
682         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
683         priv->stations[sta_id].keyinfo.keylen = 16;
684
685         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
686                         == STA_KEY_FLG_NO_ENC)
687                 priv->stations[sta_id].sta.key.key_offset =
688                                  iwl_get_free_ucode_key_index(priv);
689         /* else, we are overriding an existing key => no need to allocated room
690          * in uCode. */
691
692         /* This copy is acutally not needed: we get the key with each TX */
693         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
694
695         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
696
697         spin_unlock_irqrestore(&priv->sta_lock, flags);
698
699         return ret;
700 }
701
702 int iwl_remove_dynamic_key(struct iwl_priv *priv,
703                                 struct ieee80211_key_conf *keyconf,
704                                 u8 sta_id)
705 {
706         unsigned long flags;
707         int ret = 0;
708         u16 key_flags;
709         u8 keyidx;
710
711         priv->key_mapping_key--;
712
713         spin_lock_irqsave(&priv->sta_lock, flags);
714         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
715         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
716
717         IWL_DEBUG_WEP("Remove dynamic key: idx=%d sta=%d\n",
718                       keyconf->keyidx, sta_id);
719
720         if (keyconf->keyidx != keyidx) {
721                 /* We need to remove a key with index different that the one
722                  * in the uCode. This means that the key we need to remove has
723                  * been replaced by another one with different index.
724                  * Don't do anything and return ok
725                  */
726                 spin_unlock_irqrestore(&priv->sta_lock, flags);
727                 return 0;
728         }
729
730         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
731                 &priv->ucode_key_table))
732                 IWL_ERROR("index %d not used in uCode key table.\n",
733                         priv->stations[sta_id].sta.key.key_offset);
734         memset(&priv->stations[sta_id].keyinfo, 0,
735                                         sizeof(struct iwl_hw_key));
736         memset(&priv->stations[sta_id].sta.key, 0,
737                                         sizeof(struct iwl4965_keyinfo));
738         priv->stations[sta_id].sta.key.key_flags =
739                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
740         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
741         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
742         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
743
744         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
745         spin_unlock_irqrestore(&priv->sta_lock, flags);
746         return ret;
747 }
748 EXPORT_SYMBOL(iwl_remove_dynamic_key);
749
750 int iwl_set_dynamic_key(struct iwl_priv *priv,
751                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
752 {
753         int ret;
754
755         priv->key_mapping_key++;
756         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
757
758         switch (keyconf->alg) {
759         case ALG_CCMP:
760                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
761                 break;
762         case ALG_TKIP:
763                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
764                 break;
765         case ALG_WEP:
766                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
767                 break;
768         default:
769                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
770                 ret = -EINVAL;
771         }
772
773         IWL_DEBUG_WEP("Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
774                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
775                       sta_id, ret);
776
777         return ret;
778 }
779 EXPORT_SYMBOL(iwl_set_dynamic_key);
780
781 #ifdef CONFIG_IWLWIFI_DEBUG
782 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
783                            struct iwl_link_quality_cmd *lq)
784 {
785         int i;
786         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
787         IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
788                        lq->general_params.single_stream_ant_msk,
789                        lq->general_params.dual_stream_ant_msk);
790
791         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
792                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
793                                i, lq->rs_table[i].rate_n_flags);
794 }
795 #else
796 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
797                                    struct iwl_link_quality_cmd *lq)
798 {
799 }
800 #endif
801
802 int iwl_send_lq_cmd(struct iwl_priv *priv,
803                     struct iwl_link_quality_cmd *lq, u8 flags)
804 {
805         struct iwl_host_cmd cmd = {
806                 .id = REPLY_TX_LINK_QUALITY_CMD,
807                 .len = sizeof(struct iwl_link_quality_cmd),
808                 .meta.flags = flags,
809                 .data = lq,
810         };
811
812         if ((lq->sta_id == 0xFF) &&
813             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
814                 return -EINVAL;
815
816         if (lq->sta_id == 0xFF)
817                 lq->sta_id = IWL_AP_ID;
818
819         iwl_dump_lq_cmd(priv, lq);
820
821         if (iwl_is_associated(priv) && priv->assoc_station_added)
822                 return  iwl_send_cmd(priv, &cmd);
823
824         return 0;
825 }
826 EXPORT_SYMBOL(iwl_send_lq_cmd);
827
828 /**
829  * iwl_sta_init_lq - Initialize a station's hardware rate table
830  *
831  * The uCode's station table contains a table of fallback rates
832  * for automatic fallback during transmission.
833  *
834  * NOTE: This sets up a default set of values.  These will be replaced later
835  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
836  *       rc80211_simple.
837  *
838  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
839  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
840  *       which requires station table entry to exist).
841  */
842 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
843 {
844         int i, r;
845         struct iwl_link_quality_cmd link_cmd = {
846                 .reserved1 = 0,
847         };
848         u32 rate_flags;
849
850         /* Set up the rate scaling to start at selected rate, fall back
851          * all the way down to 1M in IEEE order, and then spin on 1M */
852         if (is_ap)
853                 r = IWL_RATE_54M_INDEX;
854         else if (priv->band == IEEE80211_BAND_5GHZ)
855                 r = IWL_RATE_6M_INDEX;
856         else
857                 r = IWL_RATE_1M_INDEX;
858
859         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
860                 rate_flags = 0;
861                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
862                         rate_flags |= RATE_MCS_CCK_MSK;
863
864                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
865                                 RATE_MCS_ANT_POS;
866
867                 link_cmd.rs_table[i].rate_n_flags =
868                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
869                 r = iwl4965_get_prev_ieee_rate(r);
870         }
871
872         link_cmd.general_params.single_stream_ant_msk =
873                                 first_antenna(priv->hw_params.valid_tx_ant);
874         link_cmd.general_params.dual_stream_ant_msk = 3;
875         link_cmd.agg_params.agg_dis_start_th = 3;
876         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
877
878         /* Update the rate scaling for control frame Tx to AP */
879         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
880
881         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
882                                sizeof(link_cmd), &link_cmd, NULL);
883 }
884
885 /**
886  * iwl_rxon_add_station - add station into station table.
887  *
888  * there is only one AP station with id= IWL_AP_ID
889  * NOTE: mutex must be held before calling this fnction
890  */
891 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
892 {
893         u8 sta_id;
894
895         /* Add station to device's station table */
896         struct ieee80211_conf *conf = &priv->hw->conf;
897         struct ieee80211_sta_ht_cap *cur_ht_config = &conf->ht_cap;
898
899         if ((is_ap) &&
900             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
901             (priv->iw_mode == NL80211_IFTYPE_STATION))
902                 sta_id = iwl_add_station_flags(priv, addr, is_ap,
903                                                    0, cur_ht_config);
904         else
905                 sta_id = iwl_add_station_flags(priv, addr, is_ap,
906                                                    0, NULL);
907
908         /* Set up default rate scaling table in device's station table */
909         iwl_sta_init_lq(priv, addr, is_ap);
910
911         return sta_id;
912 }
913 EXPORT_SYMBOL(iwl_rxon_add_station);
914
915 /**
916  * iwl_get_sta_id - Find station's index within station table
917  *
918  * If new IBSS station, create new entry in station table
919  */
920 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
921 {
922         int sta_id;
923         u16 fc = le16_to_cpu(hdr->frame_control);
924
925         /* If this frame is broadcast or management, use broadcast station id */
926         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
927             is_multicast_ether_addr(hdr->addr1))
928                 return priv->hw_params.bcast_sta_id;
929
930         switch (priv->iw_mode) {
931
932         /* If we are a client station in a BSS network, use the special
933          * AP station entry (that's the only station we communicate with) */
934         case NL80211_IFTYPE_STATION:
935                 return IWL_AP_ID;
936
937         /* If we are an AP, then find the station, or use BCAST */
938         case NL80211_IFTYPE_AP:
939                 sta_id = iwl_find_station(priv, hdr->addr1);
940                 if (sta_id != IWL_INVALID_STATION)
941                         return sta_id;
942                 return priv->hw_params.bcast_sta_id;
943
944         /* If this frame is going out to an IBSS network, find the station,
945          * or create a new station table entry */
946         case NL80211_IFTYPE_ADHOC:
947                 sta_id = iwl_find_station(priv, hdr->addr1);
948                 if (sta_id != IWL_INVALID_STATION)
949                         return sta_id;
950
951                 /* Create new station table entry */
952                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
953                                                    0, CMD_ASYNC, NULL);
954
955                 if (sta_id != IWL_INVALID_STATION)
956                         return sta_id;
957
958                 IWL_DEBUG_DROP("Station %pM not in station map. "
959                                "Defaulting to broadcast...\n",
960                                hdr->addr1);
961                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
962                 return priv->hw_params.bcast_sta_id;
963
964         /* If we are in monitor mode, use BCAST. This is required for
965          * packet injection. */
966         case NL80211_IFTYPE_MONITOR:
967                 return priv->hw_params.bcast_sta_id;
968
969         default:
970                 IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
971                 return priv->hw_params.bcast_sta_id;
972         }
973 }
974 EXPORT_SYMBOL(iwl_get_sta_id);
975
976 /**
977  * iwl_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
978  */
979 void iwl_sta_modify_enable_tid_tx(struct iwl_priv *priv, int sta_id, int tid)
980 {
981         unsigned long flags;
982
983         /* Remove "disable" flag, to enable Tx for this TID */
984         spin_lock_irqsave(&priv->sta_lock, flags);
985         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
986         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
987         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
988         spin_unlock_irqrestore(&priv->sta_lock, flags);
989
990         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
991 }
992 EXPORT_SYMBOL(iwl_sta_modify_enable_tid_tx);
993