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iwlwifi: rework broadcast station management
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-sta.c
blob7e51647cf02da601bef41b30592c035355d8b847
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2010 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 #include <linux/sched.h>
33
34 #include "iwl-dev.h"
35 #include "iwl-core.h"
36 #include "iwl-sta.h"
37
38 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
39 {
40 int i;
41 int start = 0;
42 int ret = IWL_INVALID_STATION;
43 unsigned long flags;
44
45 if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
46 (priv->iw_mode == NL80211_IFTYPE_AP))
47 start = IWL_STA_ID;
48
49 if (is_broadcast_ether_addr(addr))
50 return priv->hw_params.bcast_sta_id;
51
52 spin_lock_irqsave(&priv->sta_lock, flags);
53 for (i = start; i < priv->hw_params.max_stations; i++)
54 if (priv->stations[i].used &&
55 (!compare_ether_addr(priv->stations[i].sta.sta.addr,
56 addr))) {
57 ret = i;
58 goto out;
59 }
60
61 IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
62 addr, priv->num_stations);
63
64 out:
65 /*
66 * It may be possible that more commands interacting with stations
67 * arrive before we completed processing the adding of
68 * station
69 */
70 if (ret != IWL_INVALID_STATION &&
71 (!(priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) ||
72 ((priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) &&
73 (priv->stations[ret].used & IWL_STA_UCODE_INPROGRESS)))) {
74 IWL_ERR(priv, "Requested station info for sta %d before ready.\n",
75 ret);
76 ret = IWL_INVALID_STATION;
77 }
78 spin_unlock_irqrestore(&priv->sta_lock, flags);
79 return ret;
80 }
81 EXPORT_SYMBOL(iwl_find_station);
82
83 /* priv->sta_lock must be held */
84 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
85 {
86
87 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
88 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
89 sta_id, priv->stations[sta_id].sta.sta.addr);
90
91 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
92 IWL_DEBUG_ASSOC(priv,
93 "STA id %u addr %pM already present in uCode (according to driver)\n",
94 sta_id, priv->stations[sta_id].sta.sta.addr);
95 } else {
96 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
97 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
98 sta_id, priv->stations[sta_id].sta.sta.addr);
99 }
100 }
101
102 static void iwl_process_add_sta_resp(struct iwl_priv *priv,
103 struct iwl_addsta_cmd *addsta,
104 struct iwl_rx_packet *pkt,
105 bool sync)
106 {
107 u8 sta_id = addsta->sta.sta_id;
108 unsigned long flags;
109
110 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
111 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
112 pkt->hdr.flags);
113 return;
114 }
115
116 IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
117 sta_id);
118
119 spin_lock_irqsave(&priv->sta_lock, flags);
120
121 switch (pkt->u.add_sta.status) {
122 case ADD_STA_SUCCESS_MSK:
123 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
124 iwl_sta_ucode_activate(priv, sta_id);
125 break;
126 case ADD_STA_NO_ROOM_IN_TABLE:
127 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
128 sta_id);
129 break;
130 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
131 IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n",
132 sta_id);
133 break;
134 case ADD_STA_MODIFY_NON_EXIST_STA:
135 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
136 sta_id);
137 break;
138 default:
139 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
140 pkt->u.add_sta.status);
141 break;
142 }
143
144 IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
145 priv->stations[sta_id].sta.mode ==
146 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
147 sta_id, priv->stations[sta_id].sta.sta.addr);
148
149 /*
150 * XXX: The MAC address in the command buffer is often changed from
151 * the original sent to the device. That is, the MAC address
152 * written to the command buffer often is not the same MAC adress
153 * read from the command buffer when the command returns. This
154 * issue has not yet been resolved and this debugging is left to
155 * observe the problem.
156 */
157 IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
158 priv->stations[sta_id].sta.mode ==
159 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
160 addsta->sta.addr);
161 spin_unlock_irqrestore(&priv->sta_lock, flags);
162 }
163
164 static void iwl_add_sta_callback(struct iwl_priv *priv,
165 struct iwl_device_cmd *cmd,
166 struct iwl_rx_packet *pkt)
167 {
168 struct iwl_addsta_cmd *addsta =
169 (struct iwl_addsta_cmd *)cmd->cmd.payload;
170
171 iwl_process_add_sta_resp(priv, addsta, pkt, false);
172
173 }
174
175 int iwl_send_add_sta(struct iwl_priv *priv,
176 struct iwl_addsta_cmd *sta, u8 flags)
177 {
178 struct iwl_rx_packet *pkt = NULL;
179 int ret = 0;
180 u8 data[sizeof(*sta)];
181 struct iwl_host_cmd cmd = {
182 .id = REPLY_ADD_STA,
183 .flags = flags,
184 .data = data,
185 };
186 u8 sta_id __maybe_unused = sta->sta.sta_id;
187
188 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
189 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
190
191 if (flags & CMD_ASYNC)
192 cmd.callback = iwl_add_sta_callback;
193 else
194 cmd.flags |= CMD_WANT_SKB;
195
196 cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
197 ret = iwl_send_cmd(priv, &cmd);
198
199 if (ret || (flags & CMD_ASYNC))
200 return ret;
201
202 if (ret == 0) {
203 pkt = (struct iwl_rx_packet *)cmd.reply_page;
204 iwl_process_add_sta_resp(priv, sta, pkt, true);
205 }
206 iwl_free_pages(priv, cmd.reply_page);
207
208 return ret;
209 }
210 EXPORT_SYMBOL(iwl_send_add_sta);
211
212 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
213 struct ieee80211_sta_ht_cap *sta_ht_inf)
214 {
215 __le32 sta_flags;
216 u8 mimo_ps_mode;
217
218 if (!sta_ht_inf || !sta_ht_inf->ht_supported)
219 goto done;
220
221 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
222 IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
223 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
224 "static" :
225 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
226 "dynamic" : "disabled");
227
228 sta_flags = priv->stations[index].sta.station_flags;
229
230 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
231
232 switch (mimo_ps_mode) {
233 case WLAN_HT_CAP_SM_PS_STATIC:
234 sta_flags |= STA_FLG_MIMO_DIS_MSK;
235 break;
236 case WLAN_HT_CAP_SM_PS_DYNAMIC:
237 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
238 break;
239 case WLAN_HT_CAP_SM_PS_DISABLED:
240 break;
241 default:
242 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
243 break;
244 }
245
246 sta_flags |= cpu_to_le32(
247 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
248
249 sta_flags |= cpu_to_le32(
250 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
251
252 if (iwl_is_ht40_tx_allowed(priv, sta_ht_inf))
253 sta_flags |= STA_FLG_HT40_EN_MSK;
254 else
255 sta_flags &= ~STA_FLG_HT40_EN_MSK;
256
257 priv->stations[index].sta.station_flags = sta_flags;
258 done:
259 return;
260 }
261
262 /**
263 * iwl_prep_station - Prepare station information for addition
264 *
265 * should be called with sta_lock held
266 */
267 static u8 iwl_prep_station(struct iwl_priv *priv, const u8 *addr,
268 bool is_ap,
269 struct ieee80211_sta_ht_cap *ht_info)
270 {
271 struct iwl_station_entry *station;
272 int i;
273 u8 sta_id = IWL_INVALID_STATION;
274 u16 rate;
275
276 if (is_ap)
277 sta_id = IWL_AP_ID;
278 else if (is_broadcast_ether_addr(addr))
279 sta_id = priv->hw_params.bcast_sta_id;
280 else
281 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
282 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
283 addr)) {
284 sta_id = i;
285 break;
286 }
287
288 if (!priv->stations[i].used &&
289 sta_id == IWL_INVALID_STATION)
290 sta_id = i;
291 }
292
293 /*
294 * These two conditions have the same outcome, but keep them
295 * separate
296 */
297 if (unlikely(sta_id == IWL_INVALID_STATION))
298 return sta_id;
299
300 /*
301 * uCode is not able to deal with multiple requests to add a
302 * station. Keep track if one is in progress so that we do not send
303 * another.
304 */
305 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
306 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
307 sta_id);
308 return sta_id;
309 }
310
311 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
312 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
313 !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
314 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
315 sta_id, addr);
316 return sta_id;
317 }
318
319 station = &priv->stations[sta_id];
320 station->used = IWL_STA_DRIVER_ACTIVE;
321 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
322 sta_id, addr);
323 priv->num_stations++;
324
325 /* Set up the REPLY_ADD_STA command to send to device */
326 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
327 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
328 station->sta.mode = 0;
329 station->sta.sta.sta_id = sta_id;
330 station->sta.station_flags = 0;
331
332 /* BCAST station and IBSS stations do not work in HT mode */
333 if (sta_id != priv->hw_params.bcast_sta_id &&
334 priv->iw_mode != NL80211_IFTYPE_ADHOC)
335 iwl_set_ht_add_station(priv, sta_id, ht_info);
336
337 /* 3945 only */
338 rate = (priv->band == IEEE80211_BAND_5GHZ) ?
339 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
340 /* Turn on both antennas for the station... */
341 station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
342
343 return sta_id;
344
345 }
346
347 #define STA_WAIT_TIMEOUT (HZ/2)
348
349 /**
350 * iwl_add_station_common -
351 */
352 int iwl_add_station_common(struct iwl_priv *priv, const u8 *addr,
353 bool is_ap,
354 struct ieee80211_sta_ht_cap *ht_info,
355 u8 *sta_id_r)
356 {
357 struct iwl_station_entry *station;
358 unsigned long flags_spin;
359 int ret = 0;
360 u8 sta_id;
361
362 *sta_id_r = 0;
363 spin_lock_irqsave(&priv->sta_lock, flags_spin);
364 sta_id = iwl_prep_station(priv, addr, is_ap, ht_info);
365 if (sta_id == IWL_INVALID_STATION) {
366 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
367 addr);
368 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
369 return -EINVAL;
370 }
371
372 /*
373 * uCode is not able to deal with multiple requests to add a
374 * station. Keep track if one is in progress so that we do not send
375 * another.
376 */
377 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
378 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
379 sta_id);
380 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
381 return -EEXIST;
382 }
383
384 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
385 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
386 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
387 sta_id, addr);
388 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
389 return -EEXIST;
390 }
391
392 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
393 station = &priv->stations[sta_id];
394 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
395
396 /* Add station to device's station table */
397 ret = iwl_send_add_sta(priv, &station->sta, CMD_SYNC);
398 if (ret) {
399 IWL_ERR(priv, "Adding station %pM failed.\n", station->sta.sta.addr);
400 spin_lock_irqsave(&priv->sta_lock, flags_spin);
401 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
402 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
403 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
404 }
405 *sta_id_r = sta_id;
406 return ret;
407 }
408 EXPORT_SYMBOL(iwl_add_station_common);
409
410 static struct iwl_link_quality_cmd *iwl_sta_alloc_lq(struct iwl_priv *priv,
411 u8 sta_id)
412 {
413 int i, r;
414 struct iwl_link_quality_cmd *link_cmd;
415 u32 rate_flags;
416
417 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
418 if (!link_cmd) {
419 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
420 return NULL;
421 }
422 /* Set up the rate scaling to start at selected rate, fall back
423 * all the way down to 1M in IEEE order, and then spin on 1M */
424 if (priv->band == IEEE80211_BAND_5GHZ)
425 r = IWL_RATE_6M_INDEX;
426 else
427 r = IWL_RATE_1M_INDEX;
428
429 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
430 rate_flags = 0;
431 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
432 rate_flags |= RATE_MCS_CCK_MSK;
433
434 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
435 RATE_MCS_ANT_POS;
436
437 link_cmd->rs_table[i].rate_n_flags =
438 iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
439 r = iwl_get_prev_ieee_rate(r);
440 }
441
442 link_cmd->general_params.single_stream_ant_msk =
443 first_antenna(priv->hw_params.valid_tx_ant);
444
445 link_cmd->general_params.dual_stream_ant_msk =
446 priv->hw_params.valid_tx_ant &
447 ~first_antenna(priv->hw_params.valid_tx_ant);
448 if (!link_cmd->general_params.dual_stream_ant_msk) {
449 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
450 } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) {
451 link_cmd->general_params.dual_stream_ant_msk =
452 priv->hw_params.valid_tx_ant;
453 }
454
455 link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
456 link_cmd->agg_params.agg_time_limit =
457 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
458
459 link_cmd->sta_id = sta_id;
460
461 return link_cmd;
462 }
463
464 /*
465 * iwl_add_local_stations - Add stations not requested by mac80211
466 *
467 * This will be either the broadcast station or the bssid station needed by
468 * ad-hoc.
469 *
470 * Function sleeps.
471 */
472 int iwl_add_local_station(struct iwl_priv *priv, const u8 *addr, bool init_rs)
473 {
474 int ret;
475 u8 sta_id;
476 struct iwl_link_quality_cmd *link_cmd;
477 unsigned long flags;
478
479 ret = iwl_add_station_common(priv, addr, 0, NULL, &sta_id);
480 if (ret) {
481 IWL_ERR(priv, "Unable to add station %pM\n", addr);
482 return ret;
483 }
484
485 spin_lock_irqsave(&priv->sta_lock, flags);
486 priv->stations[sta_id].used |= IWL_STA_LOCAL;
487 spin_unlock_irqrestore(&priv->sta_lock, flags);
488
489 if (init_rs) {
490 /* Set up default rate scaling table in device's station table */
491 link_cmd = iwl_sta_alloc_lq(priv, sta_id);
492 if (!link_cmd) {
493 IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n",
494 addr);
495 return -ENOMEM;
496 }
497
498 ret = iwl_send_lq_cmd(priv, link_cmd, CMD_SYNC, true);
499 if (ret)
500 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
501
502 spin_lock_irqsave(&priv->sta_lock, flags);
503 priv->stations[sta_id].lq = link_cmd;
504 spin_unlock_irqrestore(&priv->sta_lock, flags);
505 }
506
507 return 0;
508 }
509 EXPORT_SYMBOL(iwl_add_local_station);
510
511 /**
512 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
513 *
514 * priv->sta_lock must be held
515 */
516 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
517 {
518 /* Ucode must be active and driver must be non active */
519 if ((priv->stations[sta_id].used &
520 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE)
521 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
522
523 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
524
525 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
526 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
527 }
528
529 static int iwl_send_remove_station(struct iwl_priv *priv,
530 struct iwl_station_entry *station)
531 {
532 struct iwl_rx_packet *pkt;
533 int ret;
534
535 unsigned long flags_spin;
536 struct iwl_rem_sta_cmd rm_sta_cmd;
537
538 struct iwl_host_cmd cmd = {
539 .id = REPLY_REMOVE_STA,
540 .len = sizeof(struct iwl_rem_sta_cmd),
541 .flags = CMD_SYNC,
542 .data = &rm_sta_cmd,
543 };
544
545 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
546 rm_sta_cmd.num_sta = 1;
547 memcpy(&rm_sta_cmd.addr, &station->sta.sta.addr , ETH_ALEN);
548
549 cmd.flags |= CMD_WANT_SKB;
550
551 ret = iwl_send_cmd(priv, &cmd);
552
553 if (ret)
554 return ret;
555
556 pkt = (struct iwl_rx_packet *)cmd.reply_page;
557 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
558 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
559 pkt->hdr.flags);
560 ret = -EIO;
561 }
562
563 if (!ret) {
564 switch (pkt->u.rem_sta.status) {
565 case REM_STA_SUCCESS_MSK:
566 spin_lock_irqsave(&priv->sta_lock, flags_spin);
567 iwl_sta_ucode_deactivate(priv, station->sta.sta.sta_id);
568 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
569 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
570 break;
571 default:
572 ret = -EIO;
573 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
574 break;
575 }
576 }
577 iwl_free_pages(priv, cmd.reply_page);
578
579 return ret;
580 }
581
582 /**
583 * iwl_remove_station - Remove driver's knowledge of station.
584 */
585 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr)
586 {
587 int sta_id = IWL_INVALID_STATION;
588 int i, ret = -EINVAL;
589 unsigned long flags;
590 bool is_ap = priv->iw_mode == NL80211_IFTYPE_STATION;
591 struct iwl_station_entry *station;
592
593 if (!iwl_is_ready(priv)) {
594 IWL_DEBUG_INFO(priv,
595 "Unable to remove station %pM, device not ready.\n",
596 addr);
597 /*
598 * It is typical for stations to be removed when we are
599 * going down. Return success since device will be down
600 * soon anyway
601 */
602 return 0;
603 }
604
605 spin_lock_irqsave(&priv->sta_lock, flags);
606
607 if (is_ap)
608 sta_id = IWL_AP_ID;
609 else
610 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
611 if (priv->stations[i].used &&
612 !compare_ether_addr(priv->stations[i].sta.sta.addr,
613 addr)) {
614 sta_id = i;
615 break;
616 }
617
618 if (unlikely(sta_id == IWL_INVALID_STATION))
619 goto out;
620
621 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
622 sta_id, addr);
623
624 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
625 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
626 addr);
627 goto out;
628 }
629
630 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
631 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
632 addr);
633 goto out;
634 }
635
636 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
637 kfree(priv->stations[sta_id].lq);
638 priv->stations[sta_id].lq = NULL;
639 }
640
641 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
642
643 priv->num_stations--;
644
645 BUG_ON(priv->num_stations < 0);
646
647 station = &priv->stations[sta_id];
648 spin_unlock_irqrestore(&priv->sta_lock, flags);
649
650 ret = iwl_send_remove_station(priv, station);
651 return ret;
652 out:
653 spin_unlock_irqrestore(&priv->sta_lock, flags);
654 return ret;
655 }
656 EXPORT_SYMBOL_GPL(iwl_remove_station);
657
658 /**
659 * iwl_clear_ucode_stations - clear ucode station table bits
660 *
661 * This function clears all the bits in the driver indicating
662 * which stations are active in the ucode. Call when something
663 * other than explicit station management would cause this in
664 * the ucode, e.g. unassociated RXON.
665 */
666 void iwl_clear_ucode_stations(struct iwl_priv *priv)
667 {
668 int i;
669 unsigned long flags_spin;
670 bool cleared = false;
671
672 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
673
674 spin_lock_irqsave(&priv->sta_lock, flags_spin);
675 for (i = 0; i < priv->hw_params.max_stations; i++) {
676 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
677 IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
678 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
679 cleared = true;
680 }
681 }
682 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
683
684 if (!cleared)
685 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
686 }
687 EXPORT_SYMBOL(iwl_clear_ucode_stations);
688
689 /**
690 * iwl_restore_stations() - Restore driver known stations to device
691 *
692 * All stations considered active by driver, but not present in ucode, is
693 * restored.
694 *
695 * Function sleeps.
696 */
697 void iwl_restore_stations(struct iwl_priv *priv)
698 {
699 struct iwl_station_entry *station;
700 unsigned long flags_spin;
701 int i;
702 bool found = false;
703 int ret;
704
705 if (!iwl_is_ready(priv)) {
706 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
707 return;
708 }
709
710 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
711 spin_lock_irqsave(&priv->sta_lock, flags_spin);
712 for (i = 0; i < priv->hw_params.max_stations; i++) {
713 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
714 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
715 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
716 priv->stations[i].sta.sta.addr);
717 priv->stations[i].sta.mode = 0;
718 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
719 found = true;
720 }
721 }
722
723 for (i = 0; i < priv->hw_params.max_stations; i++) {
724 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
725 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
726 station = &priv->stations[i];
727 ret = iwl_send_add_sta(priv, &priv->stations[i].sta, CMD_SYNC);
728 if (ret) {
729 IWL_ERR(priv, "Adding station %pM failed.\n",
730 station->sta.sta.addr);
731 spin_lock_irqsave(&priv->sta_lock, flags_spin);
732 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
733 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
734 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
735 }
736 /*
737 * Rate scaling has already been initialized, send
738 * current LQ command
739 */
740 if (station->lq)
741 iwl_send_lq_cmd(priv, station->lq, CMD_SYNC, true);
742 spin_lock_irqsave(&priv->sta_lock, flags_spin);
743 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
744 }
745 }
746
747 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
748 if (!found)
749 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
750 else
751 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
752 }
753 EXPORT_SYMBOL(iwl_restore_stations);
754
755 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
756 {
757 int i;
758
759 for (i = 0; i < STA_KEY_MAX_NUM; i++)
760 if (!test_and_set_bit(i, &priv->ucode_key_table))
761 return i;
762
763 return WEP_INVALID_OFFSET;
764 }
765 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
766
767 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
768 {
769 int i, not_empty = 0;
770 u8 buff[sizeof(struct iwl_wep_cmd) +
771 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
772 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
773 size_t cmd_size = sizeof(struct iwl_wep_cmd);
774 struct iwl_host_cmd cmd = {
775 .id = REPLY_WEPKEY,
776 .data = wep_cmd,
777 .flags = CMD_SYNC,
778 };
779
780 might_sleep();
781
782 memset(wep_cmd, 0, cmd_size +
783 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
784
785 for (i = 0; i < WEP_KEYS_MAX ; i++) {
786 wep_cmd->key[i].key_index = i;
787 if (priv->wep_keys[i].key_size) {
788 wep_cmd->key[i].key_offset = i;
789 not_empty = 1;
790 } else {
791 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
792 }
793
794 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
795 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
796 priv->wep_keys[i].key_size);
797 }
798
799 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
800 wep_cmd->num_keys = WEP_KEYS_MAX;
801
802 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
803
804 cmd.len = cmd_size;
805
806 if (not_empty || send_if_empty)
807 return iwl_send_cmd(priv, &cmd);
808 else
809 return 0;
810 }
811
812 int iwl_restore_default_wep_keys(struct iwl_priv *priv)
813 {
814 WARN_ON(!mutex_is_locked(&priv->mutex));
815
816 return iwl_send_static_wepkey_cmd(priv, 0);
817 }
818 EXPORT_SYMBOL(iwl_restore_default_wep_keys);
819
820 int iwl_remove_default_wep_key(struct iwl_priv *priv,
821 struct ieee80211_key_conf *keyconf)
822 {
823 int ret;
824
825 WARN_ON(!mutex_is_locked(&priv->mutex));
826
827 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
828 keyconf->keyidx);
829
830 memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
831 if (iwl_is_rfkill(priv)) {
832 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
833 /* but keys in device are clear anyway so return success */
834 return 0;
835 }
836 ret = iwl_send_static_wepkey_cmd(priv, 1);
837 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
838 keyconf->keyidx, ret);
839
840 return ret;
841 }
842 EXPORT_SYMBOL(iwl_remove_default_wep_key);
843
844 int iwl_set_default_wep_key(struct iwl_priv *priv,
845 struct ieee80211_key_conf *keyconf)
846 {
847 int ret;
848
849 WARN_ON(!mutex_is_locked(&priv->mutex));
850
851 if (keyconf->keylen != WEP_KEY_LEN_128 &&
852 keyconf->keylen != WEP_KEY_LEN_64) {
853 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
854 return -EINVAL;
855 }
856
857 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
858 keyconf->hw_key_idx = HW_KEY_DEFAULT;
859 priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
860
861 priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
862 memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
863 keyconf->keylen);
864
865 ret = iwl_send_static_wepkey_cmd(priv, 0);
866 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
867 keyconf->keylen, keyconf->keyidx, ret);
868
869 return ret;
870 }
871 EXPORT_SYMBOL(iwl_set_default_wep_key);
872
873 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
874 struct ieee80211_key_conf *keyconf,
875 u8 sta_id)
876 {
877 unsigned long flags;
878 __le16 key_flags = 0;
879 int ret;
880
881 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
882
883 key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
884 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
885 key_flags &= ~STA_KEY_FLG_INVALID;
886
887 if (keyconf->keylen == WEP_KEY_LEN_128)
888 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
889
890 if (sta_id == priv->hw_params.bcast_sta_id)
891 key_flags |= STA_KEY_MULTICAST_MSK;
892
893 spin_lock_irqsave(&priv->sta_lock, flags);
894
895 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
896 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
897 priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
898
899 memcpy(priv->stations[sta_id].keyinfo.key,
900 keyconf->key, keyconf->keylen);
901
902 memcpy(&priv->stations[sta_id].sta.key.key[3],
903 keyconf->key, keyconf->keylen);
904
905 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
906 == STA_KEY_FLG_NO_ENC)
907 priv->stations[sta_id].sta.key.key_offset =
908 iwl_get_free_ucode_key_index(priv);
909 /* else, we are overriding an existing key => no need to allocated room
910 * in uCode. */
911
912 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
913 "no space for a new key");
914
915 priv->stations[sta_id].sta.key.key_flags = key_flags;
916 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
917 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
918
919 ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
920
921 spin_unlock_irqrestore(&priv->sta_lock, flags);
922
923 return ret;
924 }
925
926 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
927 struct ieee80211_key_conf *keyconf,
928 u8 sta_id)
929 {
930 unsigned long flags;
931 __le16 key_flags = 0;
932 int ret;
933
934 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
935 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
936 key_flags &= ~STA_KEY_FLG_INVALID;
937
938 if (sta_id == priv->hw_params.bcast_sta_id)
939 key_flags |= STA_KEY_MULTICAST_MSK;
940
941 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
942
943 spin_lock_irqsave(&priv->sta_lock, flags);
944 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
945 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
946
947 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
948 keyconf->keylen);
949
950 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
951 keyconf->keylen);
952
953 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
954 == STA_KEY_FLG_NO_ENC)
955 priv->stations[sta_id].sta.key.key_offset =
956 iwl_get_free_ucode_key_index(priv);
957 /* else, we are overriding an existing key => no need to allocated room
958 * in uCode. */
959
960 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
961 "no space for a new key");
962
963 priv->stations[sta_id].sta.key.key_flags = key_flags;
964 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
965 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
966
967 ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
968
969 spin_unlock_irqrestore(&priv->sta_lock, flags);
970
971 return ret;
972 }
973
974 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
975 struct ieee80211_key_conf *keyconf,
976 u8 sta_id)
977 {
978 unsigned long flags;
979 int ret = 0;
980 __le16 key_flags = 0;
981
982 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
983 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
984 key_flags &= ~STA_KEY_FLG_INVALID;
985
986 if (sta_id == priv->hw_params.bcast_sta_id)
987 key_flags |= STA_KEY_MULTICAST_MSK;
988
989 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
990 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
991
992 spin_lock_irqsave(&priv->sta_lock, flags);
993
994 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
995 priv->stations[sta_id].keyinfo.keylen = 16;
996
997 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
998 == STA_KEY_FLG_NO_ENC)
999 priv->stations[sta_id].sta.key.key_offset =
1000 iwl_get_free_ucode_key_index(priv);
1001 /* else, we are overriding an existing key => no need to allocated room
1002 * in uCode. */
1003
1004 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
1005 "no space for a new key");
1006
1007 priv->stations[sta_id].sta.key.key_flags = key_flags;
1008
1009
1010 /* This copy is acutally not needed: we get the key with each TX */
1011 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
1012
1013 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
1014
1015 spin_unlock_irqrestore(&priv->sta_lock, flags);
1016
1017 return ret;
1018 }
1019
1020 void iwl_update_tkip_key(struct iwl_priv *priv,
1021 struct ieee80211_key_conf *keyconf,
1022 const u8 *addr, u32 iv32, u16 *phase1key)
1023 {
1024 u8 sta_id = IWL_INVALID_STATION;
1025 unsigned long flags;
1026 int i;
1027
1028 sta_id = iwl_find_station(priv, addr);
1029 if (sta_id == IWL_INVALID_STATION) {
1030 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
1031 addr);
1032 return;
1033 }
1034
1035 if (iwl_scan_cancel(priv)) {
1036 /* cancel scan failed, just live w/ bad key and rely
1037 briefly on SW decryption */
1038 return;
1039 }
1040
1041 spin_lock_irqsave(&priv->sta_lock, flags);
1042
1043 priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
1044
1045 for (i = 0; i < 5; i++)
1046 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
1047 cpu_to_le16(phase1key[i]);
1048
1049 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1050 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1051
1052 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1053
1054 spin_unlock_irqrestore(&priv->sta_lock, flags);
1055
1056 }
1057 EXPORT_SYMBOL(iwl_update_tkip_key);
1058
1059 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1060 struct ieee80211_key_conf *keyconf,
1061 u8 sta_id)
1062 {
1063 unsigned long flags;
1064 int ret = 0;
1065 u16 key_flags;
1066 u8 keyidx;
1067
1068 priv->key_mapping_key--;
1069
1070 spin_lock_irqsave(&priv->sta_lock, flags);
1071 key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
1072 keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
1073
1074 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1075 keyconf->keyidx, sta_id);
1076
1077 if (keyconf->keyidx != keyidx) {
1078 /* We need to remove a key with index different that the one
1079 * in the uCode. This means that the key we need to remove has
1080 * been replaced by another one with different index.
1081 * Don't do anything and return ok
1082 */
1083 spin_unlock_irqrestore(&priv->sta_lock, flags);
1084 return 0;
1085 }
1086
1087 if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
1088 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
1089 keyconf->keyidx, key_flags);
1090 spin_unlock_irqrestore(&priv->sta_lock, flags);
1091 return 0;
1092 }
1093
1094 if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
1095 &priv->ucode_key_table))
1096 IWL_ERR(priv, "index %d not used in uCode key table.\n",
1097 priv->stations[sta_id].sta.key.key_offset);
1098 memset(&priv->stations[sta_id].keyinfo, 0,
1099 sizeof(struct iwl_hw_key));
1100 memset(&priv->stations[sta_id].sta.key, 0,
1101 sizeof(struct iwl4965_keyinfo));
1102 priv->stations[sta_id].sta.key.key_flags =
1103 STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1104 priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
1105 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1106 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1107
1108 if (iwl_is_rfkill(priv)) {
1109 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled.\n");
1110 spin_unlock_irqrestore(&priv->sta_lock, flags);
1111 return 0;
1112 }
1113 ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1114 spin_unlock_irqrestore(&priv->sta_lock, flags);
1115 return ret;
1116 }
1117 EXPORT_SYMBOL(iwl_remove_dynamic_key);
1118
1119 int iwl_set_dynamic_key(struct iwl_priv *priv,
1120 struct ieee80211_key_conf *keyconf, u8 sta_id)
1121 {
1122 int ret;
1123
1124 priv->key_mapping_key++;
1125 keyconf->hw_key_idx = HW_KEY_DYNAMIC;
1126
1127 switch (keyconf->alg) {
1128 case ALG_CCMP:
1129 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
1130 break;
1131 case ALG_TKIP:
1132 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
1133 break;
1134 case ALG_WEP:
1135 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
1136 break;
1137 default:
1138 IWL_ERR(priv,
1139 "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
1140 ret = -EINVAL;
1141 }
1142
1143 IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
1144 keyconf->alg, keyconf->keylen, keyconf->keyidx,
1145 sta_id, ret);
1146
1147 return ret;
1148 }
1149 EXPORT_SYMBOL(iwl_set_dynamic_key);
1150
1151 #ifdef CONFIG_IWLWIFI_DEBUG
1152 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
1153 struct iwl_link_quality_cmd *lq)
1154 {
1155 int i;
1156 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
1157 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
1158 lq->general_params.single_stream_ant_msk,
1159 lq->general_params.dual_stream_ant_msk);
1160
1161 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
1162 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
1163 i, lq->rs_table[i].rate_n_flags);
1164 }
1165 #else
1166 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
1167 struct iwl_link_quality_cmd *lq)
1168 {
1169 }
1170 #endif
1171
1172 /**
1173 * iwl_send_lq_cmd() - Send link quality command
1174 * @init: This command is sent as part of station initialization right
1175 * after station has been added.
1176 *
1177 * The link quality command is sent as the last step of station creation.
1178 * This is the special case in which init is set and we call a callback in
1179 * this case to clear the state indicating that station creation is in
1180 * progress.
1181 */
1182 int iwl_send_lq_cmd(struct iwl_priv *priv,
1183 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
1184 {
1185 int ret = 0;
1186 unsigned long flags_spin;
1187
1188 struct iwl_host_cmd cmd = {
1189 .id = REPLY_TX_LINK_QUALITY_CMD,
1190 .len = sizeof(struct iwl_link_quality_cmd),
1191 .flags = flags,
1192 .data = lq,
1193 };
1194
1195 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
1196 return -EINVAL;
1197
1198 iwl_dump_lq_cmd(priv, lq);
1199 BUG_ON(init && (cmd.flags & CMD_ASYNC));
1200
1201 ret = iwl_send_cmd(priv, &cmd);
1202
1203 if (cmd.flags & CMD_ASYNC)
1204 return ret;
1205
1206 if (init) {
1207 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
1208 lq->sta_id);
1209 spin_lock_irqsave(&priv->sta_lock, flags_spin);
1210 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1211 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1212 }
1213 return ret;
1214 }
1215 EXPORT_SYMBOL(iwl_send_lq_cmd);
1216
1217 /**
1218 * iwl_alloc_bcast_station - add broadcast station into driver's station table.
1219 *
1220 * This adds the broadcast station into the driver's station table
1221 * and marks it driver active, so that it will be restored to the
1222 * device at the next best time.
1223 */
1224 int iwl_alloc_bcast_station(struct iwl_priv *priv, bool init_lq)
1225 {
1226 struct iwl_link_quality_cmd *link_cmd;
1227 unsigned long flags;
1228 u8 sta_id;
1229
1230 spin_lock_irqsave(&priv->sta_lock, flags);
1231 sta_id = iwl_prep_station(priv, iwl_bcast_addr, false, NULL);
1232 if (sta_id == IWL_INVALID_STATION) {
1233 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1234 spin_unlock_irqrestore(&priv->sta_lock, flags);
1235
1236 return -EINVAL;
1237 }
1238
1239 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1240 priv->stations[sta_id].used |= IWL_STA_BCAST;
1241 spin_unlock_irqrestore(&priv->sta_lock, flags);
1242
1243 if (init_lq) {
1244 link_cmd = iwl_sta_alloc_lq(priv, sta_id);
1245 if (!link_cmd) {
1246 IWL_ERR(priv,
1247 "Unable to initialize rate scaling for bcast station.\n");
1248 return -ENOMEM;
1249 }
1250
1251 spin_lock_irqsave(&priv->sta_lock, flags);
1252 priv->stations[sta_id].lq = link_cmd;
1253 spin_unlock_irqrestore(&priv->sta_lock, flags);
1254 }
1255
1256 return 0;
1257 }
1258 EXPORT_SYMBOL_GPL(iwl_alloc_bcast_station);
1259
1260 void iwl_dealloc_bcast_station(struct iwl_priv *priv)
1261 {
1262 unsigned long flags;
1263 int i;
1264
1265 spin_lock_irqsave(&priv->sta_lock, flags);
1266 for (i = 0; i < priv->hw_params.max_stations; i++) {
1267 if (!(priv->stations[i].used & IWL_STA_BCAST))
1268 continue;
1269
1270 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
1271 priv->num_stations--;
1272 BUG_ON(priv->num_stations < 0);
1273 kfree(priv->stations[i].lq);
1274 priv->stations[i].lq = NULL;
1275 }
1276 spin_unlock_irqrestore(&priv->sta_lock, flags);
1277 }
1278 EXPORT_SYMBOL_GPL(iwl_dealloc_bcast_station);
1279
1280 /**
1281 * iwl_get_sta_id - Find station's index within station table
1282 *
1283 * If new IBSS station, create new entry in station table
1284 */
1285 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1286 {
1287 int sta_id;
1288 __le16 fc = hdr->frame_control;
1289
1290 /* If this frame is broadcast or management, use broadcast station id */
1291 if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1))
1292 return priv->hw_params.bcast_sta_id;
1293
1294 switch (priv->iw_mode) {
1295
1296 /* If we are a client station in a BSS network, use the special
1297 * AP station entry (that's the only station we communicate with) */
1298 case NL80211_IFTYPE_STATION:
1299 /*
1300 * If addition of station not complete yet, which means
1301 * that rate scaling has not been initialized, then return
1302 * the broadcast station.
1303 */
1304 if (!(priv->stations[IWL_AP_ID].used & IWL_STA_UCODE_ACTIVE))
1305 return priv->hw_params.bcast_sta_id;
1306 return IWL_AP_ID;
1307
1308 /* If we are an AP, then find the station, or use BCAST */
1309 case NL80211_IFTYPE_AP:
1310 sta_id = iwl_find_station(priv, hdr->addr1);
1311 if (sta_id != IWL_INVALID_STATION)
1312 return sta_id;
1313 return priv->hw_params.bcast_sta_id;
1314
1315 /* If this frame is going out to an IBSS network, find the station,
1316 * or create a new station table entry */
1317 case NL80211_IFTYPE_ADHOC:
1318 sta_id = iwl_find_station(priv, hdr->addr1);
1319 if (sta_id != IWL_INVALID_STATION)
1320 return sta_id;
1321
1322 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1323 "Defaulting to broadcast...\n",
1324 hdr->addr1);
1325 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1326 return priv->hw_params.bcast_sta_id;
1327
1328 default:
1329 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1330 priv->iw_mode);
1331 return priv->hw_params.bcast_sta_id;
1332 }
1333 }
1334 EXPORT_SYMBOL(iwl_get_sta_id);
1335
1336 /**
1337 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1338 */
1339 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1340 {
1341 unsigned long flags;
1342
1343 /* Remove "disable" flag, to enable Tx for this TID */
1344 spin_lock_irqsave(&priv->sta_lock, flags);
1345 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1346 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1347 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1348 spin_unlock_irqrestore(&priv->sta_lock, flags);
1349
1350 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1351 }
1352 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1353
1354 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1355 const u8 *addr, int tid, u16 ssn)
1356 {
1357 unsigned long flags;
1358 int sta_id;
1359
1360 sta_id = iwl_find_station(priv, addr);
1361 if (sta_id == IWL_INVALID_STATION)
1362 return -ENXIO;
1363
1364 spin_lock_irqsave(&priv->sta_lock, flags);
1365 priv->stations[sta_id].sta.station_flags_msk = 0;
1366 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1367 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1368 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1369 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1370 spin_unlock_irqrestore(&priv->sta_lock, flags);
1371
1372 return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1373 CMD_ASYNC);
1374 }
1375 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1376
1377 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1378 {
1379 unsigned long flags;
1380 int sta_id;
1381
1382 sta_id = iwl_find_station(priv, addr);
1383 if (sta_id == IWL_INVALID_STATION) {
1384 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1385 return -ENXIO;
1386 }
1387
1388 spin_lock_irqsave(&priv->sta_lock, flags);
1389 priv->stations[sta_id].sta.station_flags_msk = 0;
1390 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1391 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1392 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1393 spin_unlock_irqrestore(&priv->sta_lock, flags);
1394
1395 return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1396 CMD_ASYNC);
1397 }
1398 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1399
1400 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1401 {
1402 unsigned long flags;
1403
1404 spin_lock_irqsave(&priv->sta_lock, flags);
1405 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1406 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1407 priv->stations[sta_id].sta.sta.modify_mask = 0;
1408 priv->stations[sta_id].sta.sleep_tx_count = 0;
1409 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1410 spin_unlock_irqrestore(&priv->sta_lock, flags);
1411
1412 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1413 }
1414 EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
1415
1416 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1417 {
1418 unsigned long flags;
1419
1420 spin_lock_irqsave(&priv->sta_lock, flags);
1421 priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1422 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1423 priv->stations[sta_id].sta.sta.modify_mask =
1424 STA_MODIFY_SLEEP_TX_COUNT_MSK;
1425 priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1426 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1427 spin_unlock_irqrestore(&priv->sta_lock, flags);
1428
1429 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1430 }
1431 EXPORT_SYMBOL(iwl_sta_modify_sleep_tx_count);
1432
1433 int iwl_mac_sta_remove(struct ieee80211_hw *hw,
1434 struct ieee80211_vif *vif,
1435 struct ieee80211_sta *sta)
1436 {
1437 int ret;
1438 struct iwl_priv *priv = hw->priv;
1439 IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
1440 sta->addr);
1441 ret = iwl_remove_station(priv, sta->addr);
1442 if (ret)
1443 IWL_ERR(priv, "Error removing station %pM\n",
1444 sta->addr);
1445 return ret;
1446 }
1447 EXPORT_SYMBOL(iwl_mac_sta_remove);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree