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Merge branch 'acpi-lpss'
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / dvm / sta.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2013 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 #include <linux/etherdevice.h>
30 #include <net/mac80211.h>
31 #include "iwl-trans.h"
32 #include "dev.h"
33 #include "agn.h"
34
35 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
36
37 static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
38 {
39 lockdep_assert_held(&priv->sta_lock);
40
41 if (sta_id >= IWLAGN_STATION_COUNT) {
42 IWL_ERR(priv, "invalid sta_id %u", sta_id);
43 return -EINVAL;
44 }
45 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
46 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
47 "addr %pM\n",
48 sta_id, priv->stations[sta_id].sta.sta.addr);
49
50 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
51 IWL_DEBUG_ASSOC(priv,
52 "STA id %u addr %pM already present in uCode "
53 "(according to driver)\n",
54 sta_id, priv->stations[sta_id].sta.sta.addr);
55 } else {
56 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
57 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
58 sta_id, priv->stations[sta_id].sta.sta.addr);
59 }
60 return 0;
61 }
62
63 static int iwl_process_add_sta_resp(struct iwl_priv *priv,
64 struct iwl_addsta_cmd *addsta,
65 struct iwl_rx_packet *pkt)
66 {
67 struct iwl_add_sta_resp *add_sta_resp = (void *)pkt->data;
68 u8 sta_id = addsta->sta.sta_id;
69 int ret = -EIO;
70
71 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
72 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
73 pkt->hdr.flags);
74 return ret;
75 }
76
77 IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
78 sta_id);
79
80 spin_lock_bh(&priv->sta_lock);
81
82 switch (add_sta_resp->status) {
83 case ADD_STA_SUCCESS_MSK:
84 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
85 ret = iwl_sta_ucode_activate(priv, sta_id);
86 break;
87 case ADD_STA_NO_ROOM_IN_TABLE:
88 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
89 sta_id);
90 break;
91 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
92 IWL_ERR(priv, "Adding station %d failed, no block ack "
93 "resource.\n", sta_id);
94 break;
95 case ADD_STA_MODIFY_NON_EXIST_STA:
96 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
97 sta_id);
98 break;
99 default:
100 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
101 add_sta_resp->status);
102 break;
103 }
104
105 IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
106 priv->stations[sta_id].sta.mode ==
107 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
108 sta_id, priv->stations[sta_id].sta.sta.addr);
109
110 /*
111 * XXX: The MAC address in the command buffer is often changed from
112 * the original sent to the device. That is, the MAC address
113 * written to the command buffer often is not the same MAC address
114 * read from the command buffer when the command returns. This
115 * issue has not yet been resolved and this debugging is left to
116 * observe the problem.
117 */
118 IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
119 priv->stations[sta_id].sta.mode ==
120 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
121 addsta->sta.addr);
122 spin_unlock_bh(&priv->sta_lock);
123
124 return ret;
125 }
126
127 int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
128 struct iwl_device_cmd *cmd)
129 {
130 struct iwl_rx_packet *pkt = rxb_addr(rxb);
131
132 if (!cmd)
133 return 0;
134
135 return iwl_process_add_sta_resp(priv, (void *)cmd->payload, pkt);
136 }
137
138 int iwl_send_add_sta(struct iwl_priv *priv,
139 struct iwl_addsta_cmd *sta, u8 flags)
140 {
141 int ret = 0;
142 struct iwl_host_cmd cmd = {
143 .id = REPLY_ADD_STA,
144 .flags = flags,
145 .data = { sta, },
146 .len = { sizeof(*sta), },
147 };
148 u8 sta_id __maybe_unused = sta->sta.sta_id;
149
150 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
151 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
152
153 if (!(flags & CMD_ASYNC)) {
154 cmd.flags |= CMD_WANT_SKB;
155 might_sleep();
156 }
157
158 ret = iwl_dvm_send_cmd(priv, &cmd);
159
160 if (ret || (flags & CMD_ASYNC))
161 return ret;
162 /*else the command was successfully sent in SYNC mode, need to free
163 * the reply page */
164
165 iwl_free_resp(&cmd);
166
167 if (cmd.handler_status)
168 IWL_ERR(priv, "%s - error in the CMD response %d", __func__,
169 cmd.handler_status);
170
171 return cmd.handler_status;
172 }
173
174 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
175 struct iwl_rxon_context *ctx,
176 struct ieee80211_sta *sta)
177 {
178 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
179 return false;
180
181 #ifdef CONFIG_IWLWIFI_DEBUGFS
182 if (priv->disable_ht40)
183 return false;
184 #endif
185
186 /* special case for RXON */
187 if (!sta)
188 return true;
189
190 return sta->bandwidth >= IEEE80211_STA_RX_BW_40;
191 }
192
193 static void iwl_sta_calc_ht_flags(struct iwl_priv *priv,
194 struct ieee80211_sta *sta,
195 struct iwl_rxon_context *ctx,
196 __le32 *flags, __le32 *mask)
197 {
198 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
199
200 *mask = STA_FLG_RTS_MIMO_PROT_MSK |
201 STA_FLG_MIMO_DIS_MSK |
202 STA_FLG_HT40_EN_MSK |
203 STA_FLG_MAX_AGG_SIZE_MSK |
204 STA_FLG_AGG_MPDU_DENSITY_MSK;
205 *flags = 0;
206
207 if (!sta || !sta_ht_inf->ht_supported)
208 return;
209
210 IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n",
211 sta->addr,
212 (sta->smps_mode == IEEE80211_SMPS_STATIC) ?
213 "static" :
214 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ?
215 "dynamic" : "disabled");
216
217 switch (sta->smps_mode) {
218 case IEEE80211_SMPS_STATIC:
219 *flags |= STA_FLG_MIMO_DIS_MSK;
220 break;
221 case IEEE80211_SMPS_DYNAMIC:
222 *flags |= STA_FLG_RTS_MIMO_PROT_MSK;
223 break;
224 case IEEE80211_SMPS_OFF:
225 break;
226 default:
227 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", sta->smps_mode);
228 break;
229 }
230
231 *flags |= cpu_to_le32(
232 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
233
234 *flags |= cpu_to_le32(
235 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
236
237 if (iwl_is_ht40_tx_allowed(priv, ctx, sta))
238 *flags |= STA_FLG_HT40_EN_MSK;
239 }
240
241 int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
242 struct ieee80211_sta *sta)
243 {
244 u8 sta_id = iwl_sta_id(sta);
245 __le32 flags, mask;
246 struct iwl_addsta_cmd cmd;
247
248 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
249 return -EINVAL;
250
251 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
252
253 spin_lock_bh(&priv->sta_lock);
254 priv->stations[sta_id].sta.station_flags &= ~mask;
255 priv->stations[sta_id].sta.station_flags |= flags;
256 spin_unlock_bh(&priv->sta_lock);
257
258 memset(&cmd, 0, sizeof(cmd));
259 cmd.mode = STA_CONTROL_MODIFY_MSK;
260 cmd.station_flags_msk = mask;
261 cmd.station_flags = flags;
262 cmd.sta.sta_id = sta_id;
263
264 return iwl_send_add_sta(priv, &cmd, CMD_SYNC);
265 }
266
267 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
268 struct ieee80211_sta *sta,
269 struct iwl_rxon_context *ctx)
270 {
271 __le32 flags, mask;
272
273 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
274
275 lockdep_assert_held(&priv->sta_lock);
276 priv->stations[index].sta.station_flags &= ~mask;
277 priv->stations[index].sta.station_flags |= flags;
278 }
279
280 /**
281 * iwl_prep_station - Prepare station information for addition
282 *
283 * should be called with sta_lock held
284 */
285 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
286 const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
287 {
288 struct iwl_station_entry *station;
289 int i;
290 u8 sta_id = IWL_INVALID_STATION;
291
292 if (is_ap)
293 sta_id = ctx->ap_sta_id;
294 else if (is_broadcast_ether_addr(addr))
295 sta_id = ctx->bcast_sta_id;
296 else
297 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
298 if (ether_addr_equal(priv->stations[i].sta.sta.addr,
299 addr)) {
300 sta_id = i;
301 break;
302 }
303
304 if (!priv->stations[i].used &&
305 sta_id == IWL_INVALID_STATION)
306 sta_id = i;
307 }
308
309 /*
310 * These two conditions have the same outcome, but keep them
311 * separate
312 */
313 if (unlikely(sta_id == IWL_INVALID_STATION))
314 return sta_id;
315
316 /*
317 * uCode is not able to deal with multiple requests to add a
318 * station. Keep track if one is in progress so that we do not send
319 * another.
320 */
321 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
322 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
323 "added.\n", sta_id);
324 return sta_id;
325 }
326
327 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
328 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
329 ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) {
330 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
331 "adding again.\n", sta_id, addr);
332 return sta_id;
333 }
334
335 station = &priv->stations[sta_id];
336 station->used = IWL_STA_DRIVER_ACTIVE;
337 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
338 sta_id, addr);
339 priv->num_stations++;
340
341 /* Set up the REPLY_ADD_STA command to send to device */
342 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
343 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
344 station->sta.mode = 0;
345 station->sta.sta.sta_id = sta_id;
346 station->sta.station_flags = ctx->station_flags;
347 station->ctxid = ctx->ctxid;
348
349 if (sta) {
350 struct iwl_station_priv *sta_priv;
351
352 sta_priv = (void *)sta->drv_priv;
353 sta_priv->ctx = ctx;
354 }
355
356 /*
357 * OK to call unconditionally, since local stations (IBSS BSSID
358 * STA and broadcast STA) pass in a NULL sta, and mac80211
359 * doesn't allow HT IBSS.
360 */
361 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
362
363 return sta_id;
364
365 }
366
367 #define STA_WAIT_TIMEOUT (HZ/2)
368
369 /**
370 * iwl_add_station_common -
371 */
372 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
373 const u8 *addr, bool is_ap,
374 struct ieee80211_sta *sta, u8 *sta_id_r)
375 {
376 int ret = 0;
377 u8 sta_id;
378 struct iwl_addsta_cmd sta_cmd;
379
380 *sta_id_r = 0;
381 spin_lock_bh(&priv->sta_lock);
382 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
383 if (sta_id == IWL_INVALID_STATION) {
384 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
385 addr);
386 spin_unlock_bh(&priv->sta_lock);
387 return -EINVAL;
388 }
389
390 /*
391 * uCode is not able to deal with multiple requests to add a
392 * station. Keep track if one is in progress so that we do not send
393 * another.
394 */
395 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
396 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
397 "added.\n", sta_id);
398 spin_unlock_bh(&priv->sta_lock);
399 return -EEXIST;
400 }
401
402 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
403 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
404 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
405 "adding again.\n", sta_id, addr);
406 spin_unlock_bh(&priv->sta_lock);
407 return -EEXIST;
408 }
409
410 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
411 memcpy(&sta_cmd, &priv->stations[sta_id].sta,
412 sizeof(struct iwl_addsta_cmd));
413 spin_unlock_bh(&priv->sta_lock);
414
415 /* Add station to device's station table */
416 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
417 if (ret) {
418 spin_lock_bh(&priv->sta_lock);
419 IWL_ERR(priv, "Adding station %pM failed.\n",
420 priv->stations[sta_id].sta.sta.addr);
421 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
422 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
423 spin_unlock_bh(&priv->sta_lock);
424 }
425 *sta_id_r = sta_id;
426 return ret;
427 }
428
429 /**
430 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
431 */
432 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
433 {
434 lockdep_assert_held(&priv->sta_lock);
435
436 /* Ucode must be active and driver must be non active */
437 if ((priv->stations[sta_id].used &
438 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
439 IWL_STA_UCODE_ACTIVE)
440 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
441
442 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
443
444 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
445 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
446 }
447
448 static int iwl_send_remove_station(struct iwl_priv *priv,
449 const u8 *addr, int sta_id,
450 bool temporary)
451 {
452 struct iwl_rx_packet *pkt;
453 int ret;
454 struct iwl_rem_sta_cmd rm_sta_cmd;
455
456 struct iwl_host_cmd cmd = {
457 .id = REPLY_REMOVE_STA,
458 .len = { sizeof(struct iwl_rem_sta_cmd), },
459 .flags = CMD_SYNC,
460 .data = { &rm_sta_cmd, },
461 };
462
463 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
464 rm_sta_cmd.num_sta = 1;
465 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
466
467 cmd.flags |= CMD_WANT_SKB;
468
469 ret = iwl_dvm_send_cmd(priv, &cmd);
470
471 if (ret)
472 return ret;
473
474 pkt = cmd.resp_pkt;
475 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
476 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
477 pkt->hdr.flags);
478 ret = -EIO;
479 }
480
481 if (!ret) {
482 struct iwl_rem_sta_resp *rem_sta_resp = (void *)pkt->data;
483 switch (rem_sta_resp->status) {
484 case REM_STA_SUCCESS_MSK:
485 if (!temporary) {
486 spin_lock_bh(&priv->sta_lock);
487 iwl_sta_ucode_deactivate(priv, sta_id);
488 spin_unlock_bh(&priv->sta_lock);
489 }
490 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
491 break;
492 default:
493 ret = -EIO;
494 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
495 break;
496 }
497 }
498 iwl_free_resp(&cmd);
499
500 return ret;
501 }
502
503 /**
504 * iwl_remove_station - Remove driver's knowledge of station.
505 */
506 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
507 const u8 *addr)
508 {
509 u8 tid;
510
511 if (!iwl_is_ready(priv)) {
512 IWL_DEBUG_INFO(priv,
513 "Unable to remove station %pM, device not ready.\n",
514 addr);
515 /*
516 * It is typical for stations to be removed when we are
517 * going down. Return success since device will be down
518 * soon anyway
519 */
520 return 0;
521 }
522
523 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
524 sta_id, addr);
525
526 if (WARN_ON(sta_id == IWL_INVALID_STATION))
527 return -EINVAL;
528
529 spin_lock_bh(&priv->sta_lock);
530
531 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
532 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
533 addr);
534 goto out_err;
535 }
536
537 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
538 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
539 addr);
540 goto out_err;
541 }
542
543 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
544 kfree(priv->stations[sta_id].lq);
545 priv->stations[sta_id].lq = NULL;
546 }
547
548 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
549 memset(&priv->tid_data[sta_id][tid], 0,
550 sizeof(priv->tid_data[sta_id][tid]));
551
552 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
553
554 priv->num_stations--;
555
556 if (WARN_ON(priv->num_stations < 0))
557 priv->num_stations = 0;
558
559 spin_unlock_bh(&priv->sta_lock);
560
561 return iwl_send_remove_station(priv, addr, sta_id, false);
562 out_err:
563 spin_unlock_bh(&priv->sta_lock);
564 return -EINVAL;
565 }
566
567 void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
568 const u8 *addr)
569 {
570 u8 tid;
571
572 if (!iwl_is_ready(priv)) {
573 IWL_DEBUG_INFO(priv,
574 "Unable to remove station %pM, device not ready.\n",
575 addr);
576 return;
577 }
578
579 IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id);
580
581 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
582 return;
583
584 spin_lock_bh(&priv->sta_lock);
585
586 WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE));
587
588 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
589 memset(&priv->tid_data[sta_id][tid], 0,
590 sizeof(priv->tid_data[sta_id][tid]));
591
592 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
593
594 priv->num_stations--;
595
596 if (WARN_ON_ONCE(priv->num_stations < 0))
597 priv->num_stations = 0;
598
599 spin_unlock_bh(&priv->sta_lock);
600 }
601
602 static void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
603 u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
604 {
605 int i, r;
606 u32 rate_flags = 0;
607 __le32 rate_n_flags;
608
609 lockdep_assert_held(&priv->mutex);
610
611 memset(link_cmd, 0, sizeof(*link_cmd));
612
613 /* Set up the rate scaling to start at selected rate, fall back
614 * all the way down to 1M in IEEE order, and then spin on 1M */
615 if (priv->band == IEEE80211_BAND_5GHZ)
616 r = IWL_RATE_6M_INDEX;
617 else if (ctx && ctx->vif && ctx->vif->p2p)
618 r = IWL_RATE_6M_INDEX;
619 else
620 r = IWL_RATE_1M_INDEX;
621
622 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
623 rate_flags |= RATE_MCS_CCK_MSK;
624
625 rate_flags |= first_antenna(priv->nvm_data->valid_tx_ant) <<
626 RATE_MCS_ANT_POS;
627 rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
628 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
629 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
630
631 link_cmd->general_params.single_stream_ant_msk =
632 first_antenna(priv->nvm_data->valid_tx_ant);
633
634 link_cmd->general_params.dual_stream_ant_msk =
635 priv->nvm_data->valid_tx_ant &
636 ~first_antenna(priv->nvm_data->valid_tx_ant);
637 if (!link_cmd->general_params.dual_stream_ant_msk) {
638 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
639 } else if (num_of_ant(priv->nvm_data->valid_tx_ant) == 2) {
640 link_cmd->general_params.dual_stream_ant_msk =
641 priv->nvm_data->valid_tx_ant;
642 }
643
644 link_cmd->agg_params.agg_dis_start_th =
645 LINK_QUAL_AGG_DISABLE_START_DEF;
646 link_cmd->agg_params.agg_time_limit =
647 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
648
649 link_cmd->sta_id = sta_id;
650 }
651
652 /**
653 * iwl_clear_ucode_stations - clear ucode station table bits
654 *
655 * This function clears all the bits in the driver indicating
656 * which stations are active in the ucode. Call when something
657 * other than explicit station management would cause this in
658 * the ucode, e.g. unassociated RXON.
659 */
660 void iwl_clear_ucode_stations(struct iwl_priv *priv,
661 struct iwl_rxon_context *ctx)
662 {
663 int i;
664 bool cleared = false;
665
666 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
667
668 spin_lock_bh(&priv->sta_lock);
669 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
670 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
671 continue;
672
673 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
674 IWL_DEBUG_INFO(priv,
675 "Clearing ucode active for station %d\n", i);
676 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
677 cleared = true;
678 }
679 }
680 spin_unlock_bh(&priv->sta_lock);
681
682 if (!cleared)
683 IWL_DEBUG_INFO(priv,
684 "No active stations found to be cleared\n");
685 }
686
687 /**
688 * iwl_restore_stations() - Restore driver known stations to device
689 *
690 * All stations considered active by driver, but not present in ucode, is
691 * restored.
692 *
693 * Function sleeps.
694 */
695 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
696 {
697 struct iwl_addsta_cmd sta_cmd;
698 struct iwl_link_quality_cmd lq;
699 int i;
700 bool found = false;
701 int ret;
702 bool send_lq;
703
704 if (!iwl_is_ready(priv)) {
705 IWL_DEBUG_INFO(priv,
706 "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_bh(&priv->sta_lock);
712 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
713 if (ctx->ctxid != priv->stations[i].ctxid)
714 continue;
715 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
716 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
717 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
718 priv->stations[i].sta.sta.addr);
719 priv->stations[i].sta.mode = 0;
720 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
721 found = true;
722 }
723 }
724
725 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
726 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
727 memcpy(&sta_cmd, &priv->stations[i].sta,
728 sizeof(struct iwl_addsta_cmd));
729 send_lq = false;
730 if (priv->stations[i].lq) {
731 if (priv->wowlan)
732 iwl_sta_fill_lq(priv, ctx, i, &lq);
733 else
734 memcpy(&lq, priv->stations[i].lq,
735 sizeof(struct iwl_link_quality_cmd));
736 send_lq = true;
737 }
738 spin_unlock_bh(&priv->sta_lock);
739 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
740 if (ret) {
741 spin_lock_bh(&priv->sta_lock);
742 IWL_ERR(priv, "Adding station %pM failed.\n",
743 priv->stations[i].sta.sta.addr);
744 priv->stations[i].used &=
745 ~IWL_STA_DRIVER_ACTIVE;
746 priv->stations[i].used &=
747 ~IWL_STA_UCODE_INPROGRESS;
748 continue;
749 }
750 /*
751 * Rate scaling has already been initialized, send
752 * current LQ command
753 */
754 if (send_lq)
755 iwl_send_lq_cmd(priv, ctx, &lq,
756 CMD_SYNC, true);
757 spin_lock_bh(&priv->sta_lock);
758 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
759 }
760 }
761
762 spin_unlock_bh(&priv->sta_lock);
763 if (!found)
764 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
765 "no stations to be restored.\n");
766 else
767 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
768 "complete.\n");
769 }
770
771 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
772 {
773 int i;
774
775 for (i = 0; i < priv->sta_key_max_num; i++)
776 if (!test_and_set_bit(i, &priv->ucode_key_table))
777 return i;
778
779 return WEP_INVALID_OFFSET;
780 }
781
782 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
783 {
784 int i;
785
786 spin_lock_bh(&priv->sta_lock);
787 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
788 if (!(priv->stations[i].used & IWL_STA_BCAST))
789 continue;
790
791 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
792 priv->num_stations--;
793 if (WARN_ON(priv->num_stations < 0))
794 priv->num_stations = 0;
795 kfree(priv->stations[i].lq);
796 priv->stations[i].lq = NULL;
797 }
798 spin_unlock_bh(&priv->sta_lock);
799 }
800
801 #ifdef CONFIG_IWLWIFI_DEBUG
802 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
803 struct iwl_link_quality_cmd *lq)
804 {
805 int i;
806 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
807 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
808 lq->general_params.single_stream_ant_msk,
809 lq->general_params.dual_stream_ant_msk);
810
811 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
812 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
813 i, lq->rs_table[i].rate_n_flags);
814 }
815 #else
816 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
817 struct iwl_link_quality_cmd *lq)
818 {
819 }
820 #endif
821
822 /**
823 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
824 *
825 * It sometimes happens when a HT rate has been in use and we
826 * loose connectivity with AP then mac80211 will first tell us that the
827 * current channel is not HT anymore before removing the station. In such a
828 * scenario the RXON flags will be updated to indicate we are not
829 * communicating HT anymore, but the LQ command may still contain HT rates.
830 * Test for this to prevent driver from sending LQ command between the time
831 * RXON flags are updated and when LQ command is updated.
832 */
833 static bool is_lq_table_valid(struct iwl_priv *priv,
834 struct iwl_rxon_context *ctx,
835 struct iwl_link_quality_cmd *lq)
836 {
837 int i;
838
839 if (ctx->ht.enabled)
840 return true;
841
842 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
843 ctx->active.channel);
844 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
845 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
846 RATE_MCS_HT_MSK) {
847 IWL_DEBUG_INFO(priv,
848 "index %d of LQ expects HT channel\n",
849 i);
850 return false;
851 }
852 }
853 return true;
854 }
855
856 /**
857 * iwl_send_lq_cmd() - Send link quality command
858 * @init: This command is sent as part of station initialization right
859 * after station has been added.
860 *
861 * The link quality command is sent as the last step of station creation.
862 * This is the special case in which init is set and we call a callback in
863 * this case to clear the state indicating that station creation is in
864 * progress.
865 */
866 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
867 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
868 {
869 int ret = 0;
870 struct iwl_host_cmd cmd = {
871 .id = REPLY_TX_LINK_QUALITY_CMD,
872 .len = { sizeof(struct iwl_link_quality_cmd), },
873 .flags = flags,
874 .data = { lq, },
875 };
876
877 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
878 return -EINVAL;
879
880
881 spin_lock_bh(&priv->sta_lock);
882 if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
883 spin_unlock_bh(&priv->sta_lock);
884 return -EINVAL;
885 }
886 spin_unlock_bh(&priv->sta_lock);
887
888 iwl_dump_lq_cmd(priv, lq);
889 if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
890 return -EINVAL;
891
892 if (is_lq_table_valid(priv, ctx, lq))
893 ret = iwl_dvm_send_cmd(priv, &cmd);
894 else
895 ret = -EINVAL;
896
897 if (cmd.flags & CMD_ASYNC)
898 return ret;
899
900 if (init) {
901 IWL_DEBUG_INFO(priv, "init LQ command complete, "
902 "clearing sta addition status for sta %d\n",
903 lq->sta_id);
904 spin_lock_bh(&priv->sta_lock);
905 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
906 spin_unlock_bh(&priv->sta_lock);
907 }
908 return ret;
909 }
910
911
912 static struct iwl_link_quality_cmd *
913 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
914 u8 sta_id)
915 {
916 struct iwl_link_quality_cmd *link_cmd;
917
918 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
919 if (!link_cmd) {
920 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
921 return NULL;
922 }
923
924 iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
925
926 return link_cmd;
927 }
928
929 /*
930 * iwlagn_add_bssid_station - Add the special IBSS BSSID station
931 *
932 * Function sleeps.
933 */
934 int iwlagn_add_bssid_station(struct iwl_priv *priv,
935 struct iwl_rxon_context *ctx,
936 const u8 *addr, u8 *sta_id_r)
937 {
938 int ret;
939 u8 sta_id;
940 struct iwl_link_quality_cmd *link_cmd;
941
942 if (sta_id_r)
943 *sta_id_r = IWL_INVALID_STATION;
944
945 ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
946 if (ret) {
947 IWL_ERR(priv, "Unable to add station %pM\n", addr);
948 return ret;
949 }
950
951 if (sta_id_r)
952 *sta_id_r = sta_id;
953
954 spin_lock_bh(&priv->sta_lock);
955 priv->stations[sta_id].used |= IWL_STA_LOCAL;
956 spin_unlock_bh(&priv->sta_lock);
957
958 /* Set up default rate scaling table in device's station table */
959 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
960 if (!link_cmd) {
961 IWL_ERR(priv,
962 "Unable to initialize rate scaling for station %pM.\n",
963 addr);
964 return -ENOMEM;
965 }
966
967 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true);
968 if (ret)
969 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
970
971 spin_lock_bh(&priv->sta_lock);
972 priv->stations[sta_id].lq = link_cmd;
973 spin_unlock_bh(&priv->sta_lock);
974
975 return 0;
976 }
977
978 /*
979 * static WEP keys
980 *
981 * For each context, the device has a table of 4 static WEP keys
982 * (one for each key index) that is updated with the following
983 * commands.
984 */
985
986 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
987 struct iwl_rxon_context *ctx,
988 bool send_if_empty)
989 {
990 int i, not_empty = 0;
991 u8 buff[sizeof(struct iwl_wep_cmd) +
992 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
993 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
994 size_t cmd_size = sizeof(struct iwl_wep_cmd);
995 struct iwl_host_cmd cmd = {
996 .id = ctx->wep_key_cmd,
997 .data = { wep_cmd, },
998 .flags = CMD_SYNC,
999 };
1000
1001 might_sleep();
1002
1003 memset(wep_cmd, 0, cmd_size +
1004 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
1005
1006 for (i = 0; i < WEP_KEYS_MAX ; i++) {
1007 wep_cmd->key[i].key_index = i;
1008 if (ctx->wep_keys[i].key_size) {
1009 wep_cmd->key[i].key_offset = i;
1010 not_empty = 1;
1011 } else {
1012 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
1013 }
1014
1015 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
1016 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
1017 ctx->wep_keys[i].key_size);
1018 }
1019
1020 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
1021 wep_cmd->num_keys = WEP_KEYS_MAX;
1022
1023 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
1024
1025 cmd.len[0] = cmd_size;
1026
1027 if (not_empty || send_if_empty)
1028 return iwl_dvm_send_cmd(priv, &cmd);
1029 else
1030 return 0;
1031 }
1032
1033 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
1034 struct iwl_rxon_context *ctx)
1035 {
1036 lockdep_assert_held(&priv->mutex);
1037
1038 return iwl_send_static_wepkey_cmd(priv, ctx, false);
1039 }
1040
1041 int iwl_remove_default_wep_key(struct iwl_priv *priv,
1042 struct iwl_rxon_context *ctx,
1043 struct ieee80211_key_conf *keyconf)
1044 {
1045 int ret;
1046
1047 lockdep_assert_held(&priv->mutex);
1048
1049 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1050 keyconf->keyidx);
1051
1052 memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1053 if (iwl_is_rfkill(priv)) {
1054 IWL_DEBUG_WEP(priv,
1055 "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1056 /* but keys in device are clear anyway so return success */
1057 return 0;
1058 }
1059 ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1060 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1061 keyconf->keyidx, ret);
1062
1063 return ret;
1064 }
1065
1066 int iwl_set_default_wep_key(struct iwl_priv *priv,
1067 struct iwl_rxon_context *ctx,
1068 struct ieee80211_key_conf *keyconf)
1069 {
1070 int ret;
1071
1072 lockdep_assert_held(&priv->mutex);
1073
1074 if (keyconf->keylen != WEP_KEY_LEN_128 &&
1075 keyconf->keylen != WEP_KEY_LEN_64) {
1076 IWL_DEBUG_WEP(priv,
1077 "Bad WEP key length %d\n", keyconf->keylen);
1078 return -EINVAL;
1079 }
1080
1081 keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1082
1083 ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1084 memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1085 keyconf->keylen);
1086
1087 ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1088 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1089 keyconf->keylen, keyconf->keyidx, ret);
1090
1091 return ret;
1092 }
1093
1094 /*
1095 * dynamic (per-station) keys
1096 *
1097 * The dynamic keys are a little more complicated. The device has
1098 * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1099 * These are linked to stations by a table that contains an index
1100 * into the key table for each station/key index/{mcast,unicast},
1101 * i.e. it's basically an array of pointers like this:
1102 * key_offset_t key_mapping[NUM_STATIONS][4][2];
1103 * (it really works differently, but you can think of it as such)
1104 *
1105 * The key uploading and linking happens in the same command, the
1106 * add station command with STA_MODIFY_KEY_MASK.
1107 */
1108
1109 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1110 struct ieee80211_vif *vif,
1111 struct ieee80211_sta *sta)
1112 {
1113 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1114
1115 if (sta)
1116 return iwl_sta_id(sta);
1117
1118 /*
1119 * The device expects GTKs for station interfaces to be
1120 * installed as GTKs for the AP station. If we have no
1121 * station ID, then use the ap_sta_id in that case.
1122 */
1123 if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
1124 return vif_priv->ctx->ap_sta_id;
1125
1126 return IWL_INVALID_STATION;
1127 }
1128
1129 static int iwlagn_send_sta_key(struct iwl_priv *priv,
1130 struct ieee80211_key_conf *keyconf,
1131 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1132 u32 cmd_flags)
1133 {
1134 __le16 key_flags;
1135 struct iwl_addsta_cmd sta_cmd;
1136 int i;
1137
1138 spin_lock_bh(&priv->sta_lock);
1139 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1140 spin_unlock_bh(&priv->sta_lock);
1141
1142 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1143 key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1144
1145 switch (keyconf->cipher) {
1146 case WLAN_CIPHER_SUITE_CCMP:
1147 key_flags |= STA_KEY_FLG_CCMP;
1148 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1149 break;
1150 case WLAN_CIPHER_SUITE_TKIP:
1151 key_flags |= STA_KEY_FLG_TKIP;
1152 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1153 for (i = 0; i < 5; i++)
1154 sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1155 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1156 break;
1157 case WLAN_CIPHER_SUITE_WEP104:
1158 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1159 /* fall through */
1160 case WLAN_CIPHER_SUITE_WEP40:
1161 key_flags |= STA_KEY_FLG_WEP;
1162 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1163 break;
1164 default:
1165 WARN_ON(1);
1166 return -EINVAL;
1167 }
1168
1169 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1170 key_flags |= STA_KEY_MULTICAST_MSK;
1171
1172 /* key pointer (offset) */
1173 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1174
1175 sta_cmd.key.key_flags = key_flags;
1176 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1177 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1178
1179 return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1180 }
1181
1182 void iwl_update_tkip_key(struct iwl_priv *priv,
1183 struct ieee80211_vif *vif,
1184 struct ieee80211_key_conf *keyconf,
1185 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1186 {
1187 u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1188
1189 if (sta_id == IWL_INVALID_STATION)
1190 return;
1191
1192 if (iwl_scan_cancel(priv)) {
1193 /* cancel scan failed, just live w/ bad key and rely
1194 briefly on SW decryption */
1195 return;
1196 }
1197
1198 iwlagn_send_sta_key(priv, keyconf, sta_id,
1199 iv32, phase1key, CMD_ASYNC);
1200 }
1201
1202 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1203 struct iwl_rxon_context *ctx,
1204 struct ieee80211_key_conf *keyconf,
1205 struct ieee80211_sta *sta)
1206 {
1207 struct iwl_addsta_cmd sta_cmd;
1208 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1209 __le16 key_flags;
1210
1211 /* if station isn't there, neither is the key */
1212 if (sta_id == IWL_INVALID_STATION)
1213 return -ENOENT;
1214
1215 spin_lock_bh(&priv->sta_lock);
1216 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1217 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1218 sta_id = IWL_INVALID_STATION;
1219 spin_unlock_bh(&priv->sta_lock);
1220
1221 if (sta_id == IWL_INVALID_STATION)
1222 return 0;
1223
1224 lockdep_assert_held(&priv->mutex);
1225
1226 ctx->key_mapping_keys--;
1227
1228 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1229 keyconf->keyidx, sta_id);
1230
1231 if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1232 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1233 keyconf->hw_key_idx);
1234
1235 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1236 key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
1237 STA_KEY_FLG_INVALID;
1238
1239 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1240 key_flags |= STA_KEY_MULTICAST_MSK;
1241
1242 sta_cmd.key.key_flags = key_flags;
1243 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1244 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1245 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1246
1247 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1248 }
1249
1250 int iwl_set_dynamic_key(struct iwl_priv *priv,
1251 struct iwl_rxon_context *ctx,
1252 struct ieee80211_key_conf *keyconf,
1253 struct ieee80211_sta *sta)
1254 {
1255 struct ieee80211_key_seq seq;
1256 u16 p1k[5];
1257 int ret;
1258 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1259 const u8 *addr;
1260
1261 if (sta_id == IWL_INVALID_STATION)
1262 return -EINVAL;
1263
1264 lockdep_assert_held(&priv->mutex);
1265
1266 keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1267 if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1268 return -ENOSPC;
1269
1270 ctx->key_mapping_keys++;
1271
1272 switch (keyconf->cipher) {
1273 case WLAN_CIPHER_SUITE_TKIP:
1274 if (sta)
1275 addr = sta->addr;
1276 else /* station mode case only */
1277 addr = ctx->active.bssid_addr;
1278
1279 /* pre-fill phase 1 key into device cache */
1280 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1281 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1282 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1283 seq.tkip.iv32, p1k, CMD_SYNC);
1284 break;
1285 case WLAN_CIPHER_SUITE_CCMP:
1286 case WLAN_CIPHER_SUITE_WEP40:
1287 case WLAN_CIPHER_SUITE_WEP104:
1288 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1289 0, NULL, CMD_SYNC);
1290 break;
1291 default:
1292 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1293 ret = -EINVAL;
1294 }
1295
1296 if (ret) {
1297 ctx->key_mapping_keys--;
1298 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1299 }
1300
1301 IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1302 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1303 sta ? sta->addr : NULL, ret);
1304
1305 return ret;
1306 }
1307
1308 /**
1309 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1310 *
1311 * This adds the broadcast station into the driver's station table
1312 * and marks it driver active, so that it will be restored to the
1313 * device at the next best time.
1314 */
1315 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1316 struct iwl_rxon_context *ctx)
1317 {
1318 struct iwl_link_quality_cmd *link_cmd;
1319 u8 sta_id;
1320
1321 spin_lock_bh(&priv->sta_lock);
1322 sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1323 if (sta_id == IWL_INVALID_STATION) {
1324 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1325 spin_unlock_bh(&priv->sta_lock);
1326
1327 return -EINVAL;
1328 }
1329
1330 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1331 priv->stations[sta_id].used |= IWL_STA_BCAST;
1332 spin_unlock_bh(&priv->sta_lock);
1333
1334 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1335 if (!link_cmd) {
1336 IWL_ERR(priv,
1337 "Unable to initialize rate scaling for bcast station.\n");
1338 return -ENOMEM;
1339 }
1340
1341 spin_lock_bh(&priv->sta_lock);
1342 priv->stations[sta_id].lq = link_cmd;
1343 spin_unlock_bh(&priv->sta_lock);
1344
1345 return 0;
1346 }
1347
1348 /**
1349 * iwl_update_bcast_station - update broadcast station's LQ command
1350 *
1351 * Only used by iwlagn. Placed here to have all bcast station management
1352 * code together.
1353 */
1354 int iwl_update_bcast_station(struct iwl_priv *priv,
1355 struct iwl_rxon_context *ctx)
1356 {
1357 struct iwl_link_quality_cmd *link_cmd;
1358 u8 sta_id = ctx->bcast_sta_id;
1359
1360 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1361 if (!link_cmd) {
1362 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1363 return -ENOMEM;
1364 }
1365
1366 spin_lock_bh(&priv->sta_lock);
1367 if (priv->stations[sta_id].lq)
1368 kfree(priv->stations[sta_id].lq);
1369 else
1370 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1371 priv->stations[sta_id].lq = link_cmd;
1372 spin_unlock_bh(&priv->sta_lock);
1373
1374 return 0;
1375 }
1376
1377 int iwl_update_bcast_stations(struct iwl_priv *priv)
1378 {
1379 struct iwl_rxon_context *ctx;
1380 int ret = 0;
1381
1382 for_each_context(priv, ctx) {
1383 ret = iwl_update_bcast_station(priv, ctx);
1384 if (ret)
1385 break;
1386 }
1387
1388 return ret;
1389 }
1390
1391 /**
1392 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1393 */
1394 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1395 {
1396 struct iwl_addsta_cmd sta_cmd;
1397
1398 lockdep_assert_held(&priv->mutex);
1399
1400 /* Remove "disable" flag, to enable Tx for this TID */
1401 spin_lock_bh(&priv->sta_lock);
1402 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1403 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1404 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1405 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1406 spin_unlock_bh(&priv->sta_lock);
1407
1408 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1409 }
1410
1411 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1412 int tid, u16 ssn)
1413 {
1414 int sta_id;
1415 struct iwl_addsta_cmd sta_cmd;
1416
1417 lockdep_assert_held(&priv->mutex);
1418
1419 sta_id = iwl_sta_id(sta);
1420 if (sta_id == IWL_INVALID_STATION)
1421 return -ENXIO;
1422
1423 spin_lock_bh(&priv->sta_lock);
1424 priv->stations[sta_id].sta.station_flags_msk = 0;
1425 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1426 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1427 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1428 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1429 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1430 spin_unlock_bh(&priv->sta_lock);
1431
1432 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1433 }
1434
1435 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1436 int tid)
1437 {
1438 int sta_id;
1439 struct iwl_addsta_cmd sta_cmd;
1440
1441 lockdep_assert_held(&priv->mutex);
1442
1443 sta_id = iwl_sta_id(sta);
1444 if (sta_id == IWL_INVALID_STATION) {
1445 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1446 return -ENXIO;
1447 }
1448
1449 spin_lock_bh(&priv->sta_lock);
1450 priv->stations[sta_id].sta.station_flags_msk = 0;
1451 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1452 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1453 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1454 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1455 spin_unlock_bh(&priv->sta_lock);
1456
1457 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1458 }
1459
1460
1461
1462 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1463 {
1464 struct iwl_addsta_cmd cmd = {
1465 .mode = STA_CONTROL_MODIFY_MSK,
1466 .station_flags = STA_FLG_PWR_SAVE_MSK,
1467 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1468 .sta.sta_id = sta_id,
1469 .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK,
1470 .sleep_tx_count = cpu_to_le16(cnt),
1471 };
1472
1473 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1474 }
Linux kernel - Deliverables
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