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iwlwifi: fix default LQ table in 5.2 band
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-sta.c
blob6edd0341dfe2b1572ab0e888c482e3855e8ee8d0
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 #include <linux/lockdep.h>
34
35 #include "iwl-dev.h"
36 #include "iwl-core.h"
37 #include "iwl-sta.h"
38
39 /* priv->sta_lock must be held */
40 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
41 {
42
43 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
44 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
45 sta_id, priv->stations[sta_id].sta.sta.addr);
46
47 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
48 IWL_DEBUG_ASSOC(priv,
49 "STA id %u addr %pM already present in uCode (according to driver)\n",
50 sta_id, priv->stations[sta_id].sta.sta.addr);
51 } else {
52 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
53 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
54 sta_id, priv->stations[sta_id].sta.sta.addr);
55 }
56 }
57
58 static int iwl_process_add_sta_resp(struct iwl_priv *priv,
59 struct iwl_addsta_cmd *addsta,
60 struct iwl_rx_packet *pkt,
61 bool sync)
62 {
63 u8 sta_id = addsta->sta.sta_id;
64 unsigned long flags;
65 int ret = -EIO;
66
67 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
68 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
69 pkt->hdr.flags);
70 return ret;
71 }
72
73 IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
74 sta_id);
75
76 spin_lock_irqsave(&priv->sta_lock, flags);
77
78 switch (pkt->u.add_sta.status) {
79 case ADD_STA_SUCCESS_MSK:
80 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
81 iwl_sta_ucode_activate(priv, sta_id);
82 ret = 0;
83 break;
84 case ADD_STA_NO_ROOM_IN_TABLE:
85 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
86 sta_id);
87 break;
88 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
89 IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n",
90 sta_id);
91 break;
92 case ADD_STA_MODIFY_NON_EXIST_STA:
93 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
94 sta_id);
95 break;
96 default:
97 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
98 pkt->u.add_sta.status);
99 break;
100 }
101
102 IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
103 priv->stations[sta_id].sta.mode ==
104 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
105 sta_id, priv->stations[sta_id].sta.sta.addr);
106
107 /*
108 * XXX: The MAC address in the command buffer is often changed from
109 * the original sent to the device. That is, the MAC address
110 * written to the command buffer often is not the same MAC adress
111 * read from the command buffer when the command returns. This
112 * issue has not yet been resolved and this debugging is left to
113 * observe the problem.
114 */
115 IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
116 priv->stations[sta_id].sta.mode ==
117 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
118 addsta->sta.addr);
119 spin_unlock_irqrestore(&priv->sta_lock, flags);
120
121 return ret;
122 }
123
124 static void iwl_add_sta_callback(struct iwl_priv *priv,
125 struct iwl_device_cmd *cmd,
126 struct iwl_rx_packet *pkt)
127 {
128 struct iwl_addsta_cmd *addsta =
129 (struct iwl_addsta_cmd *)cmd->cmd.payload;
130
131 iwl_process_add_sta_resp(priv, addsta, pkt, false);
132
133 }
134
135 int iwl_send_add_sta(struct iwl_priv *priv,
136 struct iwl_addsta_cmd *sta, u8 flags)
137 {
138 struct iwl_rx_packet *pkt = NULL;
139 int ret = 0;
140 u8 data[sizeof(*sta)];
141 struct iwl_host_cmd cmd = {
142 .id = REPLY_ADD_STA,
143 .flags = flags,
144 .data = data,
145 };
146 u8 sta_id __maybe_unused = sta->sta.sta_id;
147
148 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
149 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
150
151 if (flags & CMD_ASYNC)
152 cmd.callback = iwl_add_sta_callback;
153 else {
154 cmd.flags |= CMD_WANT_SKB;
155 might_sleep();
156 }
157
158 cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
159 ret = iwl_send_cmd(priv, &cmd);
160
161 if (ret || (flags & CMD_ASYNC))
162 return ret;
163
164 if (ret == 0) {
165 pkt = (struct iwl_rx_packet *)cmd.reply_page;
166 ret = iwl_process_add_sta_resp(priv, sta, pkt, true);
167 }
168 iwl_free_pages(priv, cmd.reply_page);
169
170 return ret;
171 }
172 EXPORT_SYMBOL(iwl_send_add_sta);
173
174 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
175 struct ieee80211_sta *sta,
176 struct iwl_rxon_context *ctx)
177 {
178 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
179 __le32 sta_flags;
180 u8 mimo_ps_mode;
181
182 if (!sta || !sta_ht_inf->ht_supported)
183 goto done;
184
185 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
186 IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
187 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
188 "static" :
189 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
190 "dynamic" : "disabled");
191
192 sta_flags = priv->stations[index].sta.station_flags;
193
194 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
195
196 switch (mimo_ps_mode) {
197 case WLAN_HT_CAP_SM_PS_STATIC:
198 sta_flags |= STA_FLG_MIMO_DIS_MSK;
199 break;
200 case WLAN_HT_CAP_SM_PS_DYNAMIC:
201 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
202 break;
203 case WLAN_HT_CAP_SM_PS_DISABLED:
204 break;
205 default:
206 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
207 break;
208 }
209
210 sta_flags |= cpu_to_le32(
211 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
212
213 sta_flags |= cpu_to_le32(
214 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
215
216 if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
217 sta_flags |= STA_FLG_HT40_EN_MSK;
218 else
219 sta_flags &= ~STA_FLG_HT40_EN_MSK;
220
221 priv->stations[index].sta.station_flags = sta_flags;
222 done:
223 return;
224 }
225
226 /**
227 * iwl_prep_station - Prepare station information for addition
228 *
229 * should be called with sta_lock held
230 */
231 static u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
232 const u8 *addr, bool is_ap,
233 struct ieee80211_sta *sta)
234 {
235 struct iwl_station_entry *station;
236 int i;
237 u8 sta_id = IWL_INVALID_STATION;
238 u16 rate;
239
240 if (is_ap)
241 sta_id = ctx->ap_sta_id;
242 else if (is_broadcast_ether_addr(addr))
243 sta_id = ctx->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 /*
258 * These two conditions have the same outcome, but keep them
259 * separate
260 */
261 if (unlikely(sta_id == IWL_INVALID_STATION))
262 return sta_id;
263
264 /*
265 * uCode is not able to deal with multiple requests to add a
266 * station. Keep track if one is in progress so that we do not send
267 * another.
268 */
269 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
270 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
271 sta_id);
272 return sta_id;
273 }
274
275 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
276 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
277 !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
278 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
279 sta_id, addr);
280 return sta_id;
281 }
282
283 station = &priv->stations[sta_id];
284 station->used = IWL_STA_DRIVER_ACTIVE;
285 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
286 sta_id, addr);
287 priv->num_stations++;
288
289 /* Set up the REPLY_ADD_STA command to send to device */
290 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
291 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
292 station->sta.mode = 0;
293 station->sta.sta.sta_id = sta_id;
294 station->sta.station_flags = ctx->station_flags;
295 station->ctxid = ctx->ctxid;
296
297 if (sta) {
298 struct iwl_station_priv_common *sta_priv;
299
300 sta_priv = (void *)sta->drv_priv;
301 sta_priv->ctx = ctx;
302 }
303
304 /*
305 * OK to call unconditionally, since local stations (IBSS BSSID
306 * STA and broadcast STA) pass in a NULL sta, and mac80211
307 * doesn't allow HT IBSS.
308 */
309 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
310
311 /* 3945 only */
312 rate = (priv->band == IEEE80211_BAND_5GHZ) ?
313 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
314 /* Turn on both antennas for the station... */
315 station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
316
317 return sta_id;
318
319 }
320
321 #define STA_WAIT_TIMEOUT (HZ/2)
322
323 /**
324 * iwl_add_station_common -
325 */
326 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
327 const u8 *addr, bool is_ap,
328 struct ieee80211_sta *sta, u8 *sta_id_r)
329 {
330 unsigned long flags_spin;
331 int ret = 0;
332 u8 sta_id;
333 struct iwl_addsta_cmd sta_cmd;
334
335 *sta_id_r = 0;
336 spin_lock_irqsave(&priv->sta_lock, flags_spin);
337 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
338 if (sta_id == IWL_INVALID_STATION) {
339 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
340 addr);
341 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
342 return -EINVAL;
343 }
344
345 /*
346 * uCode is not able to deal with multiple requests to add a
347 * station. Keep track if one is in progress so that we do not send
348 * another.
349 */
350 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
351 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
352 sta_id);
353 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
354 return -EEXIST;
355 }
356
357 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
358 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
359 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
360 sta_id, addr);
361 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
362 return -EEXIST;
363 }
364
365 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
366 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
367 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
368
369 /* Add station to device's station table */
370 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
371 if (ret) {
372 spin_lock_irqsave(&priv->sta_lock, flags_spin);
373 IWL_ERR(priv, "Adding station %pM failed.\n",
374 priv->stations[sta_id].sta.sta.addr);
375 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
376 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
377 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
378 }
379 *sta_id_r = sta_id;
380 return ret;
381 }
382 EXPORT_SYMBOL(iwl_add_station_common);
383
384 static struct iwl_link_quality_cmd *iwl_sta_alloc_lq(struct iwl_priv *priv,
385 u8 sta_id)
386 {
387 int i, r;
388 struct iwl_link_quality_cmd *link_cmd;
389 u32 rate_flags = 0;
390 __le32 rate_n_flags;
391
392 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
393 if (!link_cmd) {
394 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
395 return NULL;
396 }
397 /* Set up the rate scaling to start at selected rate, fall back
398 * all the way down to 1M in IEEE order, and then spin on 1M */
399 if (priv->band == IEEE80211_BAND_5GHZ)
400 r = IWL_RATE_6M_INDEX;
401 else
402 r = IWL_RATE_1M_INDEX;
403
404 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
405 rate_flags |= RATE_MCS_CCK_MSK;
406
407 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
408 RATE_MCS_ANT_POS;
409 rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
410 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
411 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
412
413 link_cmd->general_params.single_stream_ant_msk =
414 first_antenna(priv->hw_params.valid_tx_ant);
415
416 link_cmd->general_params.dual_stream_ant_msk =
417 priv->hw_params.valid_tx_ant &
418 ~first_antenna(priv->hw_params.valid_tx_ant);
419 if (!link_cmd->general_params.dual_stream_ant_msk) {
420 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
421 } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) {
422 link_cmd->general_params.dual_stream_ant_msk =
423 priv->hw_params.valid_tx_ant;
424 }
425
426 link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
427 link_cmd->agg_params.agg_time_limit =
428 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
429
430 link_cmd->sta_id = sta_id;
431
432 return link_cmd;
433 }
434
435 /*
436 * iwl_add_bssid_station - Add the special IBSS BSSID station
437 *
438 * Function sleeps.
439 */
440 int iwl_add_bssid_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
441 const u8 *addr, bool init_rs, u8 *sta_id_r)
442 {
443 int ret;
444 u8 sta_id;
445 struct iwl_link_quality_cmd *link_cmd;
446 unsigned long flags;
447
448 if (sta_id_r)
449 *sta_id_r = IWL_INVALID_STATION;
450
451 ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
452 if (ret) {
453 IWL_ERR(priv, "Unable to add station %pM\n", addr);
454 return ret;
455 }
456
457 if (sta_id_r)
458 *sta_id_r = sta_id;
459
460 spin_lock_irqsave(&priv->sta_lock, flags);
461 priv->stations[sta_id].used |= IWL_STA_LOCAL;
462 spin_unlock_irqrestore(&priv->sta_lock, flags);
463
464 if (init_rs) {
465 /* Set up default rate scaling table in device's station table */
466 link_cmd = iwl_sta_alloc_lq(priv, sta_id);
467 if (!link_cmd) {
468 IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n",
469 addr);
470 return -ENOMEM;
471 }
472
473 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true);
474 if (ret)
475 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
476
477 spin_lock_irqsave(&priv->sta_lock, flags);
478 priv->stations[sta_id].lq = link_cmd;
479 spin_unlock_irqrestore(&priv->sta_lock, flags);
480 }
481
482 return 0;
483 }
484 EXPORT_SYMBOL(iwl_add_bssid_station);
485
486 /**
487 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
488 *
489 * priv->sta_lock must be held
490 */
491 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
492 {
493 /* Ucode must be active and driver must be non active */
494 if ((priv->stations[sta_id].used &
495 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE)
496 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
497
498 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
499
500 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
501 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
502 }
503
504 static int iwl_send_remove_station(struct iwl_priv *priv,
505 const u8 *addr, int sta_id)
506 {
507 struct iwl_rx_packet *pkt;
508 int ret;
509
510 unsigned long flags_spin;
511 struct iwl_rem_sta_cmd rm_sta_cmd;
512
513 struct iwl_host_cmd cmd = {
514 .id = REPLY_REMOVE_STA,
515 .len = sizeof(struct iwl_rem_sta_cmd),
516 .flags = CMD_SYNC,
517 .data = &rm_sta_cmd,
518 };
519
520 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
521 rm_sta_cmd.num_sta = 1;
522 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
523
524 cmd.flags |= CMD_WANT_SKB;
525
526 ret = iwl_send_cmd(priv, &cmd);
527
528 if (ret)
529 return ret;
530
531 pkt = (struct iwl_rx_packet *)cmd.reply_page;
532 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
533 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
534 pkt->hdr.flags);
535 ret = -EIO;
536 }
537
538 if (!ret) {
539 switch (pkt->u.rem_sta.status) {
540 case REM_STA_SUCCESS_MSK:
541 spin_lock_irqsave(&priv->sta_lock, flags_spin);
542 iwl_sta_ucode_deactivate(priv, sta_id);
543 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
544 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
545 break;
546 default:
547 ret = -EIO;
548 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
549 break;
550 }
551 }
552 iwl_free_pages(priv, cmd.reply_page);
553
554 return ret;
555 }
556
557 /**
558 * iwl_remove_station - Remove driver's knowledge of station.
559 */
560 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
561 const u8 *addr)
562 {
563 unsigned long flags;
564
565 if (!iwl_is_ready(priv)) {
566 IWL_DEBUG_INFO(priv,
567 "Unable to remove station %pM, device not ready.\n",
568 addr);
569 /*
570 * It is typical for stations to be removed when we are
571 * going down. Return success since device will be down
572 * soon anyway
573 */
574 return 0;
575 }
576
577 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
578 sta_id, addr);
579
580 if (WARN_ON(sta_id == IWL_INVALID_STATION))
581 return -EINVAL;
582
583 spin_lock_irqsave(&priv->sta_lock, flags);
584
585 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
586 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
587 addr);
588 goto out_err;
589 }
590
591 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
592 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
593 addr);
594 goto out_err;
595 }
596
597 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
598 kfree(priv->stations[sta_id].lq);
599 priv->stations[sta_id].lq = NULL;
600 }
601
602 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
603
604 priv->num_stations--;
605
606 BUG_ON(priv->num_stations < 0);
607
608 spin_unlock_irqrestore(&priv->sta_lock, flags);
609
610 return iwl_send_remove_station(priv, addr, sta_id);
611 out_err:
612 spin_unlock_irqrestore(&priv->sta_lock, flags);
613 return -EINVAL;
614 }
615 EXPORT_SYMBOL_GPL(iwl_remove_station);
616
617 /**
618 * iwl_clear_ucode_stations - clear ucode station table bits
619 *
620 * This function clears all the bits in the driver indicating
621 * which stations are active in the ucode. Call when something
622 * other than explicit station management would cause this in
623 * the ucode, e.g. unassociated RXON.
624 */
625 void iwl_clear_ucode_stations(struct iwl_priv *priv,
626 struct iwl_rxon_context *ctx)
627 {
628 int i;
629 unsigned long flags_spin;
630 bool cleared = false;
631
632 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
633
634 spin_lock_irqsave(&priv->sta_lock, flags_spin);
635 for (i = 0; i < priv->hw_params.max_stations; i++) {
636 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
637 continue;
638
639 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
640 IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
641 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
642 cleared = true;
643 }
644 }
645 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
646
647 if (!cleared)
648 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
649 }
650 EXPORT_SYMBOL(iwl_clear_ucode_stations);
651
652 /**
653 * iwl_restore_stations() - Restore driver known stations to device
654 *
655 * All stations considered active by driver, but not present in ucode, is
656 * restored.
657 *
658 * Function sleeps.
659 */
660 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
661 {
662 struct iwl_addsta_cmd sta_cmd;
663 struct iwl_link_quality_cmd lq;
664 unsigned long flags_spin;
665 int i;
666 bool found = false;
667 int ret;
668 bool send_lq;
669
670 if (!iwl_is_ready(priv)) {
671 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
672 return;
673 }
674
675 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
676 spin_lock_irqsave(&priv->sta_lock, flags_spin);
677 for (i = 0; i < priv->hw_params.max_stations; i++) {
678 if (ctx->ctxid != priv->stations[i].ctxid)
679 continue;
680 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
681 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
682 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
683 priv->stations[i].sta.sta.addr);
684 priv->stations[i].sta.mode = 0;
685 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
686 found = true;
687 }
688 }
689
690 for (i = 0; i < priv->hw_params.max_stations; i++) {
691 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
692 memcpy(&sta_cmd, &priv->stations[i].sta,
693 sizeof(struct iwl_addsta_cmd));
694 send_lq = false;
695 if (priv->stations[i].lq) {
696 memcpy(&lq, priv->stations[i].lq,
697 sizeof(struct iwl_link_quality_cmd));
698 send_lq = true;
699 }
700 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
701 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
702 if (ret) {
703 spin_lock_irqsave(&priv->sta_lock, flags_spin);
704 IWL_ERR(priv, "Adding station %pM failed.\n",
705 priv->stations[i].sta.sta.addr);
706 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
707 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
708 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
709 }
710 /*
711 * Rate scaling has already been initialized, send
712 * current LQ command
713 */
714 if (send_lq)
715 iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true);
716 spin_lock_irqsave(&priv->sta_lock, flags_spin);
717 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
718 }
719 }
720
721 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
722 if (!found)
723 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
724 else
725 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
726 }
727 EXPORT_SYMBOL(iwl_restore_stations);
728
729 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
730 {
731 int i;
732
733 for (i = 0; i < priv->sta_key_max_num; i++)
734 if (!test_and_set_bit(i, &priv->ucode_key_table))
735 return i;
736
737 return WEP_INVALID_OFFSET;
738 }
739 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
740
741 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
742 struct iwl_rxon_context *ctx,
743 bool send_if_empty)
744 {
745 int i, not_empty = 0;
746 u8 buff[sizeof(struct iwl_wep_cmd) +
747 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
748 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
749 size_t cmd_size = sizeof(struct iwl_wep_cmd);
750 struct iwl_host_cmd cmd = {
751 .id = ctx->wep_key_cmd,
752 .data = wep_cmd,
753 .flags = CMD_SYNC,
754 };
755
756 might_sleep();
757
758 memset(wep_cmd, 0, cmd_size +
759 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
760
761 for (i = 0; i < WEP_KEYS_MAX ; i++) {
762 wep_cmd->key[i].key_index = i;
763 if (ctx->wep_keys[i].key_size) {
764 wep_cmd->key[i].key_offset = i;
765 not_empty = 1;
766 } else {
767 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
768 }
769
770 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
771 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
772 ctx->wep_keys[i].key_size);
773 }
774
775 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
776 wep_cmd->num_keys = WEP_KEYS_MAX;
777
778 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
779
780 cmd.len = cmd_size;
781
782 if (not_empty || send_if_empty)
783 return iwl_send_cmd(priv, &cmd);
784 else
785 return 0;
786 }
787
788 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
789 struct iwl_rxon_context *ctx)
790 {
791 lockdep_assert_held(&priv->mutex);
792
793 return iwl_send_static_wepkey_cmd(priv, ctx, false);
794 }
795 EXPORT_SYMBOL(iwl_restore_default_wep_keys);
796
797 int iwl_remove_default_wep_key(struct iwl_priv *priv,
798 struct iwl_rxon_context *ctx,
799 struct ieee80211_key_conf *keyconf)
800 {
801 int ret;
802
803 lockdep_assert_held(&priv->mutex);
804
805 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
806 keyconf->keyidx);
807
808 memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
809 if (iwl_is_rfkill(priv)) {
810 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
811 /* but keys in device are clear anyway so return success */
812 return 0;
813 }
814 ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
815 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
816 keyconf->keyidx, ret);
817
818 return ret;
819 }
820 EXPORT_SYMBOL(iwl_remove_default_wep_key);
821
822 int iwl_set_default_wep_key(struct iwl_priv *priv,
823 struct iwl_rxon_context *ctx,
824 struct ieee80211_key_conf *keyconf)
825 {
826 int ret;
827
828 lockdep_assert_held(&priv->mutex);
829
830 if (keyconf->keylen != WEP_KEY_LEN_128 &&
831 keyconf->keylen != WEP_KEY_LEN_64) {
832 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
833 return -EINVAL;
834 }
835
836 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
837 keyconf->hw_key_idx = HW_KEY_DEFAULT;
838 priv->stations[ctx->ap_sta_id].keyinfo.cipher = keyconf->cipher;
839
840 ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
841 memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
842 keyconf->keylen);
843
844 ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
845 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
846 keyconf->keylen, keyconf->keyidx, ret);
847
848 return ret;
849 }
850 EXPORT_SYMBOL(iwl_set_default_wep_key);
851
852 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
853 struct iwl_rxon_context *ctx,
854 struct ieee80211_key_conf *keyconf,
855 u8 sta_id)
856 {
857 unsigned long flags;
858 __le16 key_flags = 0;
859 struct iwl_addsta_cmd sta_cmd;
860
861 lockdep_assert_held(&priv->mutex);
862
863 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
864
865 key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
866 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
867 key_flags &= ~STA_KEY_FLG_INVALID;
868
869 if (keyconf->keylen == WEP_KEY_LEN_128)
870 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
871
872 if (sta_id == ctx->bcast_sta_id)
873 key_flags |= STA_KEY_MULTICAST_MSK;
874
875 spin_lock_irqsave(&priv->sta_lock, flags);
876
877 priv->stations[sta_id].keyinfo.cipher = keyconf->cipher;
878 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
879 priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
880
881 memcpy(priv->stations[sta_id].keyinfo.key,
882 keyconf->key, keyconf->keylen);
883
884 memcpy(&priv->stations[sta_id].sta.key.key[3],
885 keyconf->key, keyconf->keylen);
886
887 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
888 == STA_KEY_FLG_NO_ENC)
889 priv->stations[sta_id].sta.key.key_offset =
890 iwl_get_free_ucode_key_index(priv);
891 /* else, we are overriding an existing key => no need to allocated room
892 * in uCode. */
893
894 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
895 "no space for a new key");
896
897 priv->stations[sta_id].sta.key.key_flags = key_flags;
898 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
899 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
900
901 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
902 spin_unlock_irqrestore(&priv->sta_lock, flags);
903
904 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
905 }
906
907 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
908 struct iwl_rxon_context *ctx,
909 struct ieee80211_key_conf *keyconf,
910 u8 sta_id)
911 {
912 unsigned long flags;
913 __le16 key_flags = 0;
914 struct iwl_addsta_cmd sta_cmd;
915
916 lockdep_assert_held(&priv->mutex);
917
918 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
919 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
920 key_flags &= ~STA_KEY_FLG_INVALID;
921
922 if (sta_id == ctx->bcast_sta_id)
923 key_flags |= STA_KEY_MULTICAST_MSK;
924
925 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
926
927 spin_lock_irqsave(&priv->sta_lock, flags);
928 priv->stations[sta_id].keyinfo.cipher = keyconf->cipher;
929 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
930
931 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
932 keyconf->keylen);
933
934 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
935 keyconf->keylen);
936
937 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
938 == STA_KEY_FLG_NO_ENC)
939 priv->stations[sta_id].sta.key.key_offset =
940 iwl_get_free_ucode_key_index(priv);
941 /* else, we are overriding an existing key => no need to allocated room
942 * in uCode. */
943
944 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
945 "no space for a new key");
946
947 priv->stations[sta_id].sta.key.key_flags = key_flags;
948 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
949 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
950
951 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
952 spin_unlock_irqrestore(&priv->sta_lock, flags);
953
954 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
955 }
956
957 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
958 struct iwl_rxon_context *ctx,
959 struct ieee80211_key_conf *keyconf,
960 u8 sta_id)
961 {
962 unsigned long flags;
963 int ret = 0;
964 __le16 key_flags = 0;
965
966 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
967 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
968 key_flags &= ~STA_KEY_FLG_INVALID;
969
970 if (sta_id == ctx->bcast_sta_id)
971 key_flags |= STA_KEY_MULTICAST_MSK;
972
973 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
974 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
975
976 spin_lock_irqsave(&priv->sta_lock, flags);
977
978 priv->stations[sta_id].keyinfo.cipher = keyconf->cipher;
979 priv->stations[sta_id].keyinfo.keylen = 16;
980
981 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
982 == STA_KEY_FLG_NO_ENC)
983 priv->stations[sta_id].sta.key.key_offset =
984 iwl_get_free_ucode_key_index(priv);
985 /* else, we are overriding an existing key => no need to allocated room
986 * in uCode. */
987
988 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
989 "no space for a new key");
990
991 priv->stations[sta_id].sta.key.key_flags = key_flags;
992
993
994 /* This copy is acutally not needed: we get the key with each TX */
995 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
996
997 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
998
999 spin_unlock_irqrestore(&priv->sta_lock, flags);
1000
1001 return ret;
1002 }
1003
1004 void iwl_update_tkip_key(struct iwl_priv *priv,
1005 struct iwl_rxon_context *ctx,
1006 struct ieee80211_key_conf *keyconf,
1007 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1008 {
1009 u8 sta_id;
1010 unsigned long flags;
1011 int i;
1012
1013 if (iwl_scan_cancel(priv)) {
1014 /* cancel scan failed, just live w/ bad key and rely
1015 briefly on SW decryption */
1016 return;
1017 }
1018
1019 sta_id = iwl_sta_id_or_broadcast(priv, ctx, sta);
1020 if (sta_id == IWL_INVALID_STATION)
1021 return;
1022
1023 spin_lock_irqsave(&priv->sta_lock, flags);
1024
1025 priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
1026
1027 for (i = 0; i < 5; i++)
1028 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
1029 cpu_to_le16(phase1key[i]);
1030
1031 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1032 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1033
1034 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1035
1036 spin_unlock_irqrestore(&priv->sta_lock, flags);
1037
1038 }
1039 EXPORT_SYMBOL(iwl_update_tkip_key);
1040
1041 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1042 struct iwl_rxon_context *ctx,
1043 struct ieee80211_key_conf *keyconf,
1044 u8 sta_id)
1045 {
1046 unsigned long flags;
1047 u16 key_flags;
1048 u8 keyidx;
1049 struct iwl_addsta_cmd sta_cmd;
1050
1051 lockdep_assert_held(&priv->mutex);
1052
1053 ctx->key_mapping_keys--;
1054
1055 spin_lock_irqsave(&priv->sta_lock, flags);
1056 key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
1057 keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
1058
1059 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1060 keyconf->keyidx, sta_id);
1061
1062 if (keyconf->keyidx != keyidx) {
1063 /* We need to remove a key with index different that the one
1064 * in the uCode. This means that the key we need to remove has
1065 * been replaced by another one with different index.
1066 * Don't do anything and return ok
1067 */
1068 spin_unlock_irqrestore(&priv->sta_lock, flags);
1069 return 0;
1070 }
1071
1072 if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
1073 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
1074 keyconf->keyidx, key_flags);
1075 spin_unlock_irqrestore(&priv->sta_lock, flags);
1076 return 0;
1077 }
1078
1079 if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
1080 &priv->ucode_key_table))
1081 IWL_ERR(priv, "index %d not used in uCode key table.\n",
1082 priv->stations[sta_id].sta.key.key_offset);
1083 memset(&priv->stations[sta_id].keyinfo, 0,
1084 sizeof(struct iwl_hw_key));
1085 memset(&priv->stations[sta_id].sta.key, 0,
1086 sizeof(struct iwl4965_keyinfo));
1087 priv->stations[sta_id].sta.key.key_flags =
1088 STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1089 priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
1090 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1091 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1092
1093 if (iwl_is_rfkill(priv)) {
1094 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled.\n");
1095 spin_unlock_irqrestore(&priv->sta_lock, flags);
1096 return 0;
1097 }
1098 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1099 spin_unlock_irqrestore(&priv->sta_lock, flags);
1100
1101 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1102 }
1103 EXPORT_SYMBOL(iwl_remove_dynamic_key);
1104
1105 int iwl_set_dynamic_key(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
1106 struct ieee80211_key_conf *keyconf, u8 sta_id)
1107 {
1108 int ret;
1109
1110 lockdep_assert_held(&priv->mutex);
1111
1112 ctx->key_mapping_keys++;
1113 keyconf->hw_key_idx = HW_KEY_DYNAMIC;
1114
1115 switch (keyconf->cipher) {
1116 case WLAN_CIPHER_SUITE_CCMP:
1117 ret = iwl_set_ccmp_dynamic_key_info(priv, ctx, keyconf, sta_id);
1118 break;
1119 case WLAN_CIPHER_SUITE_TKIP:
1120 ret = iwl_set_tkip_dynamic_key_info(priv, ctx, keyconf, sta_id);
1121 break;
1122 case WLAN_CIPHER_SUITE_WEP40:
1123 case WLAN_CIPHER_SUITE_WEP104:
1124 ret = iwl_set_wep_dynamic_key_info(priv, ctx, keyconf, sta_id);
1125 break;
1126 default:
1127 IWL_ERR(priv,
1128 "Unknown alg: %s cipher = %x\n", __func__,
1129 keyconf->cipher);
1130 ret = -EINVAL;
1131 }
1132
1133 IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n",
1134 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1135 sta_id, ret);
1136
1137 return ret;
1138 }
1139 EXPORT_SYMBOL(iwl_set_dynamic_key);
1140
1141 #ifdef CONFIG_IWLWIFI_DEBUG
1142 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
1143 struct iwl_link_quality_cmd *lq)
1144 {
1145 int i;
1146 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
1147 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
1148 lq->general_params.single_stream_ant_msk,
1149 lq->general_params.dual_stream_ant_msk);
1150
1151 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
1152 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
1153 i, lq->rs_table[i].rate_n_flags);
1154 }
1155 #else
1156 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
1157 struct iwl_link_quality_cmd *lq)
1158 {
1159 }
1160 #endif
1161
1162 /**
1163 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
1164 *
1165 * It sometimes happens when a HT rate has been in use and we
1166 * loose connectivity with AP then mac80211 will first tell us that the
1167 * current channel is not HT anymore before removing the station. In such a
1168 * scenario the RXON flags will be updated to indicate we are not
1169 * communicating HT anymore, but the LQ command may still contain HT rates.
1170 * Test for this to prevent driver from sending LQ command between the time
1171 * RXON flags are updated and when LQ command is updated.
1172 */
1173 static bool is_lq_table_valid(struct iwl_priv *priv,
1174 struct iwl_rxon_context *ctx,
1175 struct iwl_link_quality_cmd *lq)
1176 {
1177 int i;
1178
1179 if (ctx->ht.enabled)
1180 return true;
1181
1182 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
1183 ctx->active.channel);
1184 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
1185 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
1186 IWL_DEBUG_INFO(priv,
1187 "index %d of LQ expects HT channel\n",
1188 i);
1189 return false;
1190 }
1191 }
1192 return true;
1193 }
1194
1195 /**
1196 * iwl_send_lq_cmd() - Send link quality command
1197 * @init: This command is sent as part of station initialization right
1198 * after station has been added.
1199 *
1200 * The link quality command is sent as the last step of station creation.
1201 * This is the special case in which init is set and we call a callback in
1202 * this case to clear the state indicating that station creation is in
1203 * progress.
1204 */
1205 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
1206 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
1207 {
1208 int ret = 0;
1209 unsigned long flags_spin;
1210
1211 struct iwl_host_cmd cmd = {
1212 .id = REPLY_TX_LINK_QUALITY_CMD,
1213 .len = sizeof(struct iwl_link_quality_cmd),
1214 .flags = flags,
1215 .data = lq,
1216 };
1217
1218 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
1219 return -EINVAL;
1220
1221 iwl_dump_lq_cmd(priv, lq);
1222 BUG_ON(init && (cmd.flags & CMD_ASYNC));
1223
1224 if (is_lq_table_valid(priv, ctx, lq))
1225 ret = iwl_send_cmd(priv, &cmd);
1226 else
1227 ret = -EINVAL;
1228
1229 if (cmd.flags & CMD_ASYNC)
1230 return ret;
1231
1232 if (init) {
1233 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
1234 lq->sta_id);
1235 spin_lock_irqsave(&priv->sta_lock, flags_spin);
1236 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1237 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1238 }
1239 return ret;
1240 }
1241 EXPORT_SYMBOL(iwl_send_lq_cmd);
1242
1243 /**
1244 * iwl_alloc_bcast_station - add broadcast station into driver's station table.
1245 *
1246 * This adds the broadcast station into the driver's station table
1247 * and marks it driver active, so that it will be restored to the
1248 * device at the next best time.
1249 */
1250 int iwl_alloc_bcast_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
1251 bool init_lq)
1252 {
1253 struct iwl_link_quality_cmd *link_cmd;
1254 unsigned long flags;
1255 u8 sta_id;
1256
1257 spin_lock_irqsave(&priv->sta_lock, flags);
1258 sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1259 if (sta_id == IWL_INVALID_STATION) {
1260 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1261 spin_unlock_irqrestore(&priv->sta_lock, flags);
1262
1263 return -EINVAL;
1264 }
1265
1266 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1267 priv->stations[sta_id].used |= IWL_STA_BCAST;
1268 spin_unlock_irqrestore(&priv->sta_lock, flags);
1269
1270 if (init_lq) {
1271 link_cmd = iwl_sta_alloc_lq(priv, sta_id);
1272 if (!link_cmd) {
1273 IWL_ERR(priv,
1274 "Unable to initialize rate scaling for bcast station.\n");
1275 return -ENOMEM;
1276 }
1277
1278 spin_lock_irqsave(&priv->sta_lock, flags);
1279 priv->stations[sta_id].lq = link_cmd;
1280 spin_unlock_irqrestore(&priv->sta_lock, flags);
1281 }
1282
1283 return 0;
1284 }
1285 EXPORT_SYMBOL_GPL(iwl_alloc_bcast_station);
1286
1287 /**
1288 * iwl_update_bcast_station - update broadcast station's LQ command
1289 *
1290 * Only used by iwlagn. Placed here to have all bcast station management
1291 * code together.
1292 */
1293 static int iwl_update_bcast_station(struct iwl_priv *priv,
1294 struct iwl_rxon_context *ctx)
1295 {
1296 unsigned long flags;
1297 struct iwl_link_quality_cmd *link_cmd;
1298 u8 sta_id = ctx->bcast_sta_id;
1299
1300 link_cmd = iwl_sta_alloc_lq(priv, sta_id);
1301 if (!link_cmd) {
1302 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1303 return -ENOMEM;
1304 }
1305
1306 spin_lock_irqsave(&priv->sta_lock, flags);
1307 if (priv->stations[sta_id].lq)
1308 kfree(priv->stations[sta_id].lq);
1309 else
1310 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1311 priv->stations[sta_id].lq = link_cmd;
1312 spin_unlock_irqrestore(&priv->sta_lock, flags);
1313
1314 return 0;
1315 }
1316
1317 int iwl_update_bcast_stations(struct iwl_priv *priv)
1318 {
1319 struct iwl_rxon_context *ctx;
1320 int ret = 0;
1321
1322 for_each_context(priv, ctx) {
1323 ret = iwl_update_bcast_station(priv, ctx);
1324 if (ret)
1325 break;
1326 }
1327
1328 return ret;
1329 }
1330 EXPORT_SYMBOL_GPL(iwl_update_bcast_stations);
1331
1332 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
1333 {
1334 unsigned long flags;
1335 int i;
1336
1337 spin_lock_irqsave(&priv->sta_lock, flags);
1338 for (i = 0; i < priv->hw_params.max_stations; i++) {
1339 if (!(priv->stations[i].used & IWL_STA_BCAST))
1340 continue;
1341
1342 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
1343 priv->num_stations--;
1344 BUG_ON(priv->num_stations < 0);
1345 kfree(priv->stations[i].lq);
1346 priv->stations[i].lq = NULL;
1347 }
1348 spin_unlock_irqrestore(&priv->sta_lock, flags);
1349 }
1350 EXPORT_SYMBOL_GPL(iwl_dealloc_bcast_stations);
1351
1352 /**
1353 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1354 */
1355 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1356 {
1357 unsigned long flags;
1358 struct iwl_addsta_cmd sta_cmd;
1359
1360 lockdep_assert_held(&priv->mutex);
1361
1362 /* Remove "disable" flag, to enable Tx for this TID */
1363 spin_lock_irqsave(&priv->sta_lock, flags);
1364 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1365 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1366 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1367 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1368 spin_unlock_irqrestore(&priv->sta_lock, flags);
1369
1370 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1371 }
1372 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1373
1374 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1375 int tid, u16 ssn)
1376 {
1377 unsigned long flags;
1378 int sta_id;
1379 struct iwl_addsta_cmd sta_cmd;
1380
1381 lockdep_assert_held(&priv->mutex);
1382
1383 sta_id = iwl_sta_id(sta);
1384 if (sta_id == IWL_INVALID_STATION)
1385 return -ENXIO;
1386
1387 spin_lock_irqsave(&priv->sta_lock, flags);
1388 priv->stations[sta_id].sta.station_flags_msk = 0;
1389 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1390 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1391 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1392 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1393 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1394 spin_unlock_irqrestore(&priv->sta_lock, flags);
1395
1396 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1397 }
1398 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1399
1400 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1401 int tid)
1402 {
1403 unsigned long flags;
1404 int sta_id;
1405 struct iwl_addsta_cmd sta_cmd;
1406
1407 lockdep_assert_held(&priv->mutex);
1408
1409 sta_id = iwl_sta_id(sta);
1410 if (sta_id == IWL_INVALID_STATION) {
1411 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1412 return -ENXIO;
1413 }
1414
1415 spin_lock_irqsave(&priv->sta_lock, flags);
1416 priv->stations[sta_id].sta.station_flags_msk = 0;
1417 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1418 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1419 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1420 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1421 spin_unlock_irqrestore(&priv->sta_lock, flags);
1422
1423 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1424 }
1425 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1426
1427 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1428 {
1429 unsigned long flags;
1430
1431 spin_lock_irqsave(&priv->sta_lock, flags);
1432 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1433 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1434 priv->stations[sta_id].sta.sta.modify_mask = 0;
1435 priv->stations[sta_id].sta.sleep_tx_count = 0;
1436 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1437 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1438 spin_unlock_irqrestore(&priv->sta_lock, flags);
1439
1440 }
1441 EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
1442
1443 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1444 {
1445 unsigned long flags;
1446
1447 spin_lock_irqsave(&priv->sta_lock, flags);
1448 priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1449 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1450 priv->stations[sta_id].sta.sta.modify_mask =
1451 STA_MODIFY_SLEEP_TX_COUNT_MSK;
1452 priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1453 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1454 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1455 spin_unlock_irqrestore(&priv->sta_lock, flags);
1456
1457 }
1458 EXPORT_SYMBOL(iwl_sta_modify_sleep_tx_count);
1459
1460 int iwl_mac_sta_remove(struct ieee80211_hw *hw,
1461 struct ieee80211_vif *vif,
1462 struct ieee80211_sta *sta)
1463 {
1464 struct iwl_priv *priv = hw->priv;
1465 struct iwl_station_priv_common *sta_common = (void *)sta->drv_priv;
1466 int ret;
1467
1468 IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
1469 sta->addr);
1470 mutex_lock(&priv->mutex);
1471 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
1472 sta->addr);
1473 ret = iwl_remove_station(priv, sta_common->sta_id, sta->addr);
1474 if (ret)
1475 IWL_ERR(priv, "Error removing station %pM\n",
1476 sta->addr);
1477 mutex_unlock(&priv->mutex);
1478 return ret;
1479 }
1480 EXPORT_SYMBOL(iwl_mac_sta_remove);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree