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mac80211: remove support for IFF_PROMISC
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / dvm / sta.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2014 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\n", 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\n", __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, 0);
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, 0);
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 .data = { &rm_sta_cmd, },
460 };
461
462 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
463 rm_sta_cmd.num_sta = 1;
464 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
465
466 cmd.flags |= CMD_WANT_SKB;
467
468 ret = iwl_dvm_send_cmd(priv, &cmd);
469
470 if (ret)
471 return ret;
472
473 pkt = cmd.resp_pkt;
474 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
475 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
476 pkt->hdr.flags);
477 ret = -EIO;
478 }
479
480 if (!ret) {
481 struct iwl_rem_sta_resp *rem_sta_resp = (void *)pkt->data;
482 switch (rem_sta_resp->status) {
483 case REM_STA_SUCCESS_MSK:
484 if (!temporary) {
485 spin_lock_bh(&priv->sta_lock);
486 iwl_sta_ucode_deactivate(priv, sta_id);
487 spin_unlock_bh(&priv->sta_lock);
488 }
489 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
490 break;
491 default:
492 ret = -EIO;
493 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
494 break;
495 }
496 }
497 iwl_free_resp(&cmd);
498
499 return ret;
500 }
501
502 /**
503 * iwl_remove_station - Remove driver's knowledge of station.
504 */
505 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
506 const u8 *addr)
507 {
508 u8 tid;
509
510 if (!iwl_is_ready(priv)) {
511 IWL_DEBUG_INFO(priv,
512 "Unable to remove station %pM, device not ready.\n",
513 addr);
514 /*
515 * It is typical for stations to be removed when we are
516 * going down. Return success since device will be down
517 * soon anyway
518 */
519 return 0;
520 }
521
522 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
523 sta_id, addr);
524
525 if (WARN_ON(sta_id == IWL_INVALID_STATION))
526 return -EINVAL;
527
528 spin_lock_bh(&priv->sta_lock);
529
530 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
531 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
532 addr);
533 goto out_err;
534 }
535
536 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
537 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
538 addr);
539 goto out_err;
540 }
541
542 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
543 kfree(priv->stations[sta_id].lq);
544 priv->stations[sta_id].lq = NULL;
545 }
546
547 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
548 memset(&priv->tid_data[sta_id][tid], 0,
549 sizeof(priv->tid_data[sta_id][tid]));
550
551 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
552
553 priv->num_stations--;
554
555 if (WARN_ON(priv->num_stations < 0))
556 priv->num_stations = 0;
557
558 spin_unlock_bh(&priv->sta_lock);
559
560 return iwl_send_remove_station(priv, addr, sta_id, false);
561 out_err:
562 spin_unlock_bh(&priv->sta_lock);
563 return -EINVAL;
564 }
565
566 void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
567 const u8 *addr)
568 {
569 u8 tid;
570
571 if (!iwl_is_ready(priv)) {
572 IWL_DEBUG_INFO(priv,
573 "Unable to remove station %pM, device not ready.\n",
574 addr);
575 return;
576 }
577
578 IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id);
579
580 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
581 return;
582
583 spin_lock_bh(&priv->sta_lock);
584
585 WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE));
586
587 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
588 memset(&priv->tid_data[sta_id][tid], 0,
589 sizeof(priv->tid_data[sta_id][tid]));
590
591 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
592 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
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 static const struct iwl_link_quality_cmd zero_lq = {};
699 struct iwl_link_quality_cmd lq;
700 int i;
701 bool found = false;
702 int ret;
703 bool send_lq;
704
705 if (!iwl_is_ready(priv)) {
706 IWL_DEBUG_INFO(priv,
707 "Not ready yet, not restoring any stations.\n");
708 return;
709 }
710
711 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
712 spin_lock_bh(&priv->sta_lock);
713 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
714 if (ctx->ctxid != priv->stations[i].ctxid)
715 continue;
716 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
717 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
718 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
719 priv->stations[i].sta.sta.addr);
720 priv->stations[i].sta.mode = 0;
721 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
722 found = true;
723 }
724 }
725
726 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
727 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
728 memcpy(&sta_cmd, &priv->stations[i].sta,
729 sizeof(struct iwl_addsta_cmd));
730 send_lq = false;
731 if (priv->stations[i].lq) {
732 if (priv->wowlan)
733 iwl_sta_fill_lq(priv, ctx, i, &lq);
734 else
735 memcpy(&lq, priv->stations[i].lq,
736 sizeof(struct iwl_link_quality_cmd));
737
738 if (memcmp(&lq, &zero_lq, sizeof(lq)))
739 send_lq = true;
740 }
741 spin_unlock_bh(&priv->sta_lock);
742 ret = iwl_send_add_sta(priv, &sta_cmd, 0);
743 if (ret) {
744 spin_lock_bh(&priv->sta_lock);
745 IWL_ERR(priv, "Adding station %pM failed.\n",
746 priv->stations[i].sta.sta.addr);
747 priv->stations[i].used &=
748 ~IWL_STA_DRIVER_ACTIVE;
749 priv->stations[i].used &=
750 ~IWL_STA_UCODE_INPROGRESS;
751 continue;
752 }
753 /*
754 * Rate scaling has already been initialized, send
755 * current LQ command
756 */
757 if (send_lq)
758 iwl_send_lq_cmd(priv, ctx, &lq, 0, true);
759 spin_lock_bh(&priv->sta_lock);
760 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
761 }
762 }
763
764 spin_unlock_bh(&priv->sta_lock);
765 if (!found)
766 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
767 "no stations to be restored.\n");
768 else
769 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
770 "complete.\n");
771 }
772
773 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
774 {
775 int i;
776
777 for (i = 0; i < priv->sta_key_max_num; i++)
778 if (!test_and_set_bit(i, &priv->ucode_key_table))
779 return i;
780
781 return WEP_INVALID_OFFSET;
782 }
783
784 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
785 {
786 int i;
787
788 spin_lock_bh(&priv->sta_lock);
789 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
790 if (!(priv->stations[i].used & IWL_STA_BCAST))
791 continue;
792
793 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
794 priv->num_stations--;
795 if (WARN_ON(priv->num_stations < 0))
796 priv->num_stations = 0;
797 kfree(priv->stations[i].lq);
798 priv->stations[i].lq = NULL;
799 }
800 spin_unlock_bh(&priv->sta_lock);
801 }
802
803 #ifdef CONFIG_IWLWIFI_DEBUG
804 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
805 struct iwl_link_quality_cmd *lq)
806 {
807 int i;
808 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
809 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
810 lq->general_params.single_stream_ant_msk,
811 lq->general_params.dual_stream_ant_msk);
812
813 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
814 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
815 i, lq->rs_table[i].rate_n_flags);
816 }
817 #else
818 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
819 struct iwl_link_quality_cmd *lq)
820 {
821 }
822 #endif
823
824 /**
825 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
826 *
827 * It sometimes happens when a HT rate has been in use and we
828 * loose connectivity with AP then mac80211 will first tell us that the
829 * current channel is not HT anymore before removing the station. In such a
830 * scenario the RXON flags will be updated to indicate we are not
831 * communicating HT anymore, but the LQ command may still contain HT rates.
832 * Test for this to prevent driver from sending LQ command between the time
833 * RXON flags are updated and when LQ command is updated.
834 */
835 static bool is_lq_table_valid(struct iwl_priv *priv,
836 struct iwl_rxon_context *ctx,
837 struct iwl_link_quality_cmd *lq)
838 {
839 int i;
840
841 if (ctx->ht.enabled)
842 return true;
843
844 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
845 ctx->active.channel);
846 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
847 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
848 RATE_MCS_HT_MSK) {
849 IWL_DEBUG_INFO(priv,
850 "index %d of LQ expects HT channel\n",
851 i);
852 return false;
853 }
854 }
855 return true;
856 }
857
858 /**
859 * iwl_send_lq_cmd() - Send link quality command
860 * @init: This command is sent as part of station initialization right
861 * after station has been added.
862 *
863 * The link quality command is sent as the last step of station creation.
864 * This is the special case in which init is set and we call a callback in
865 * this case to clear the state indicating that station creation is in
866 * progress.
867 */
868 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
869 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
870 {
871 int ret = 0;
872 struct iwl_host_cmd cmd = {
873 .id = REPLY_TX_LINK_QUALITY_CMD,
874 .len = { sizeof(struct iwl_link_quality_cmd), },
875 .flags = flags,
876 .data = { lq, },
877 };
878
879 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
880 return -EINVAL;
881
882
883 spin_lock_bh(&priv->sta_lock);
884 if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
885 spin_unlock_bh(&priv->sta_lock);
886 return -EINVAL;
887 }
888 spin_unlock_bh(&priv->sta_lock);
889
890 iwl_dump_lq_cmd(priv, lq);
891 if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
892 return -EINVAL;
893
894 if (is_lq_table_valid(priv, ctx, lq))
895 ret = iwl_dvm_send_cmd(priv, &cmd);
896 else
897 ret = -EINVAL;
898
899 if (cmd.flags & CMD_ASYNC)
900 return ret;
901
902 if (init) {
903 IWL_DEBUG_INFO(priv, "init LQ command complete, "
904 "clearing sta addition status for sta %d\n",
905 lq->sta_id);
906 spin_lock_bh(&priv->sta_lock);
907 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
908 spin_unlock_bh(&priv->sta_lock);
909 }
910 return ret;
911 }
912
913
914 static struct iwl_link_quality_cmd *
915 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
916 u8 sta_id)
917 {
918 struct iwl_link_quality_cmd *link_cmd;
919
920 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
921 if (!link_cmd) {
922 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
923 return NULL;
924 }
925
926 iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
927
928 return link_cmd;
929 }
930
931 /*
932 * iwlagn_add_bssid_station - Add the special IBSS BSSID station
933 *
934 * Function sleeps.
935 */
936 int iwlagn_add_bssid_station(struct iwl_priv *priv,
937 struct iwl_rxon_context *ctx,
938 const u8 *addr, u8 *sta_id_r)
939 {
940 int ret;
941 u8 sta_id;
942 struct iwl_link_quality_cmd *link_cmd;
943
944 if (sta_id_r)
945 *sta_id_r = IWL_INVALID_STATION;
946
947 ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
948 if (ret) {
949 IWL_ERR(priv, "Unable to add station %pM\n", addr);
950 return ret;
951 }
952
953 if (sta_id_r)
954 *sta_id_r = sta_id;
955
956 spin_lock_bh(&priv->sta_lock);
957 priv->stations[sta_id].used |= IWL_STA_LOCAL;
958 spin_unlock_bh(&priv->sta_lock);
959
960 /* Set up default rate scaling table in device's station table */
961 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
962 if (!link_cmd) {
963 IWL_ERR(priv,
964 "Unable to initialize rate scaling for station %pM.\n",
965 addr);
966 return -ENOMEM;
967 }
968
969 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, 0, true);
970 if (ret)
971 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
972
973 spin_lock_bh(&priv->sta_lock);
974 priv->stations[sta_id].lq = link_cmd;
975 spin_unlock_bh(&priv->sta_lock);
976
977 return 0;
978 }
979
980 /*
981 * static WEP keys
982 *
983 * For each context, the device has a table of 4 static WEP keys
984 * (one for each key index) that is updated with the following
985 * commands.
986 */
987
988 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
989 struct iwl_rxon_context *ctx,
990 bool send_if_empty)
991 {
992 int i, not_empty = 0;
993 u8 buff[sizeof(struct iwl_wep_cmd) +
994 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
995 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
996 size_t cmd_size = sizeof(struct iwl_wep_cmd);
997 struct iwl_host_cmd cmd = {
998 .id = ctx->wep_key_cmd,
999 .data = { wep_cmd, },
1000 };
1001
1002 might_sleep();
1003
1004 memset(wep_cmd, 0, cmd_size +
1005 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
1006
1007 for (i = 0; i < WEP_KEYS_MAX ; i++) {
1008 wep_cmd->key[i].key_index = i;
1009 if (ctx->wep_keys[i].key_size) {
1010 wep_cmd->key[i].key_offset = i;
1011 not_empty = 1;
1012 } else {
1013 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
1014 }
1015
1016 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
1017 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
1018 ctx->wep_keys[i].key_size);
1019 }
1020
1021 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
1022 wep_cmd->num_keys = WEP_KEYS_MAX;
1023
1024 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
1025
1026 cmd.len[0] = cmd_size;
1027
1028 if (not_empty || send_if_empty)
1029 return iwl_dvm_send_cmd(priv, &cmd);
1030 else
1031 return 0;
1032 }
1033
1034 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
1035 struct iwl_rxon_context *ctx)
1036 {
1037 lockdep_assert_held(&priv->mutex);
1038
1039 return iwl_send_static_wepkey_cmd(priv, ctx, false);
1040 }
1041
1042 int iwl_remove_default_wep_key(struct iwl_priv *priv,
1043 struct iwl_rxon_context *ctx,
1044 struct ieee80211_key_conf *keyconf)
1045 {
1046 int ret;
1047
1048 lockdep_assert_held(&priv->mutex);
1049
1050 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1051 keyconf->keyidx);
1052
1053 memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1054 if (iwl_is_rfkill(priv)) {
1055 IWL_DEBUG_WEP(priv,
1056 "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1057 /* but keys in device are clear anyway so return success */
1058 return 0;
1059 }
1060 ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1061 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1062 keyconf->keyidx, ret);
1063
1064 return ret;
1065 }
1066
1067 int iwl_set_default_wep_key(struct iwl_priv *priv,
1068 struct iwl_rxon_context *ctx,
1069 struct ieee80211_key_conf *keyconf)
1070 {
1071 int ret;
1072
1073 lockdep_assert_held(&priv->mutex);
1074
1075 if (keyconf->keylen != WEP_KEY_LEN_128 &&
1076 keyconf->keylen != WEP_KEY_LEN_64) {
1077 IWL_DEBUG_WEP(priv,
1078 "Bad WEP key length %d\n", keyconf->keylen);
1079 return -EINVAL;
1080 }
1081
1082 keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1083
1084 ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1085 memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1086 keyconf->keylen);
1087
1088 ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1089 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1090 keyconf->keylen, keyconf->keyidx, ret);
1091
1092 return ret;
1093 }
1094
1095 /*
1096 * dynamic (per-station) keys
1097 *
1098 * The dynamic keys are a little more complicated. The device has
1099 * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1100 * These are linked to stations by a table that contains an index
1101 * into the key table for each station/key index/{mcast,unicast},
1102 * i.e. it's basically an array of pointers like this:
1103 * key_offset_t key_mapping[NUM_STATIONS][4][2];
1104 * (it really works differently, but you can think of it as such)
1105 *
1106 * The key uploading and linking happens in the same command, the
1107 * add station command with STA_MODIFY_KEY_MASK.
1108 */
1109
1110 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1111 struct ieee80211_vif *vif,
1112 struct ieee80211_sta *sta)
1113 {
1114 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1115
1116 if (sta)
1117 return iwl_sta_id(sta);
1118
1119 /*
1120 * The device expects GTKs for station interfaces to be
1121 * installed as GTKs for the AP station. If we have no
1122 * station ID, then use the ap_sta_id in that case.
1123 */
1124 if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
1125 return vif_priv->ctx->ap_sta_id;
1126
1127 return IWL_INVALID_STATION;
1128 }
1129
1130 static int iwlagn_send_sta_key(struct iwl_priv *priv,
1131 struct ieee80211_key_conf *keyconf,
1132 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1133 u32 cmd_flags)
1134 {
1135 __le16 key_flags;
1136 struct iwl_addsta_cmd sta_cmd;
1137 int i;
1138
1139 spin_lock_bh(&priv->sta_lock);
1140 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1141 spin_unlock_bh(&priv->sta_lock);
1142
1143 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1144 key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1145
1146 switch (keyconf->cipher) {
1147 case WLAN_CIPHER_SUITE_CCMP:
1148 key_flags |= STA_KEY_FLG_CCMP;
1149 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1150 break;
1151 case WLAN_CIPHER_SUITE_TKIP:
1152 key_flags |= STA_KEY_FLG_TKIP;
1153 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1154 for (i = 0; i < 5; i++)
1155 sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1156 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1157 break;
1158 case WLAN_CIPHER_SUITE_WEP104:
1159 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1160 /* fall through */
1161 case WLAN_CIPHER_SUITE_WEP40:
1162 key_flags |= STA_KEY_FLG_WEP;
1163 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1164 break;
1165 default:
1166 WARN_ON(1);
1167 return -EINVAL;
1168 }
1169
1170 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1171 key_flags |= STA_KEY_MULTICAST_MSK;
1172
1173 /* key pointer (offset) */
1174 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1175
1176 sta_cmd.key.key_flags = key_flags;
1177 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1178 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1179
1180 return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1181 }
1182
1183 void iwl_update_tkip_key(struct iwl_priv *priv,
1184 struct ieee80211_vif *vif,
1185 struct ieee80211_key_conf *keyconf,
1186 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1187 {
1188 u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1189
1190 if (sta_id == IWL_INVALID_STATION)
1191 return;
1192
1193 if (iwl_scan_cancel(priv)) {
1194 /* cancel scan failed, just live w/ bad key and rely
1195 briefly on SW decryption */
1196 return;
1197 }
1198
1199 iwlagn_send_sta_key(priv, keyconf, sta_id,
1200 iv32, phase1key, CMD_ASYNC);
1201 }
1202
1203 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1204 struct iwl_rxon_context *ctx,
1205 struct ieee80211_key_conf *keyconf,
1206 struct ieee80211_sta *sta)
1207 {
1208 struct iwl_addsta_cmd sta_cmd;
1209 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1210 __le16 key_flags;
1211
1212 /* if station isn't there, neither is the key */
1213 if (sta_id == IWL_INVALID_STATION)
1214 return -ENOENT;
1215
1216 spin_lock_bh(&priv->sta_lock);
1217 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1218 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1219 sta_id = IWL_INVALID_STATION;
1220 spin_unlock_bh(&priv->sta_lock);
1221
1222 if (sta_id == IWL_INVALID_STATION)
1223 return 0;
1224
1225 lockdep_assert_held(&priv->mutex);
1226
1227 ctx->key_mapping_keys--;
1228
1229 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1230 keyconf->keyidx, sta_id);
1231
1232 if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1233 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1234 keyconf->hw_key_idx);
1235
1236 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1237 key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
1238 STA_KEY_FLG_INVALID;
1239
1240 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1241 key_flags |= STA_KEY_MULTICAST_MSK;
1242
1243 sta_cmd.key.key_flags = key_flags;
1244 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1245 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1246 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1247
1248 return iwl_send_add_sta(priv, &sta_cmd, 0);
1249 }
1250
1251 int iwl_set_dynamic_key(struct iwl_priv *priv,
1252 struct iwl_rxon_context *ctx,
1253 struct ieee80211_key_conf *keyconf,
1254 struct ieee80211_sta *sta)
1255 {
1256 struct ieee80211_key_seq seq;
1257 u16 p1k[5];
1258 int ret;
1259 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1260 const u8 *addr;
1261
1262 if (sta_id == IWL_INVALID_STATION)
1263 return -EINVAL;
1264
1265 lockdep_assert_held(&priv->mutex);
1266
1267 keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1268 if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1269 return -ENOSPC;
1270
1271 ctx->key_mapping_keys++;
1272
1273 switch (keyconf->cipher) {
1274 case WLAN_CIPHER_SUITE_TKIP:
1275 if (sta)
1276 addr = sta->addr;
1277 else /* station mode case only */
1278 addr = ctx->active.bssid_addr;
1279
1280 /* pre-fill phase 1 key into device cache */
1281 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1282 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1283 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1284 seq.tkip.iv32, p1k, 0);
1285 break;
1286 case WLAN_CIPHER_SUITE_CCMP:
1287 case WLAN_CIPHER_SUITE_WEP40:
1288 case WLAN_CIPHER_SUITE_WEP104:
1289 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1290 0, NULL, 0);
1291 break;
1292 default:
1293 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1294 ret = -EINVAL;
1295 }
1296
1297 if (ret) {
1298 ctx->key_mapping_keys--;
1299 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1300 }
1301
1302 IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1303 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1304 sta ? sta->addr : NULL, ret);
1305
1306 return ret;
1307 }
1308
1309 /**
1310 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1311 *
1312 * This adds the broadcast station into the driver's station table
1313 * and marks it driver active, so that it will be restored to the
1314 * device at the next best time.
1315 */
1316 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1317 struct iwl_rxon_context *ctx)
1318 {
1319 struct iwl_link_quality_cmd *link_cmd;
1320 u8 sta_id;
1321
1322 spin_lock_bh(&priv->sta_lock);
1323 sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1324 if (sta_id == IWL_INVALID_STATION) {
1325 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1326 spin_unlock_bh(&priv->sta_lock);
1327
1328 return -EINVAL;
1329 }
1330
1331 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1332 priv->stations[sta_id].used |= IWL_STA_BCAST;
1333 spin_unlock_bh(&priv->sta_lock);
1334
1335 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1336 if (!link_cmd) {
1337 IWL_ERR(priv,
1338 "Unable to initialize rate scaling for bcast station.\n");
1339 return -ENOMEM;
1340 }
1341
1342 spin_lock_bh(&priv->sta_lock);
1343 priv->stations[sta_id].lq = link_cmd;
1344 spin_unlock_bh(&priv->sta_lock);
1345
1346 return 0;
1347 }
1348
1349 /**
1350 * iwl_update_bcast_station - update broadcast station's LQ command
1351 *
1352 * Only used by iwlagn. Placed here to have all bcast station management
1353 * code together.
1354 */
1355 int iwl_update_bcast_station(struct iwl_priv *priv,
1356 struct iwl_rxon_context *ctx)
1357 {
1358 struct iwl_link_quality_cmd *link_cmd;
1359 u8 sta_id = ctx->bcast_sta_id;
1360
1361 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1362 if (!link_cmd) {
1363 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1364 return -ENOMEM;
1365 }
1366
1367 spin_lock_bh(&priv->sta_lock);
1368 if (priv->stations[sta_id].lq)
1369 kfree(priv->stations[sta_id].lq);
1370 else
1371 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1372 priv->stations[sta_id].lq = link_cmd;
1373 spin_unlock_bh(&priv->sta_lock);
1374
1375 return 0;
1376 }
1377
1378 int iwl_update_bcast_stations(struct iwl_priv *priv)
1379 {
1380 struct iwl_rxon_context *ctx;
1381 int ret = 0;
1382
1383 for_each_context(priv, ctx) {
1384 ret = iwl_update_bcast_station(priv, ctx);
1385 if (ret)
1386 break;
1387 }
1388
1389 return ret;
1390 }
1391
1392 /**
1393 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1394 */
1395 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1396 {
1397 struct iwl_addsta_cmd sta_cmd;
1398
1399 lockdep_assert_held(&priv->mutex);
1400
1401 /* Remove "disable" flag, to enable Tx for this TID */
1402 spin_lock_bh(&priv->sta_lock);
1403 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1404 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1405 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1406 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1407 spin_unlock_bh(&priv->sta_lock);
1408
1409 return iwl_send_add_sta(priv, &sta_cmd, 0);
1410 }
1411
1412 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1413 int tid, u16 ssn)
1414 {
1415 int sta_id;
1416 struct iwl_addsta_cmd sta_cmd;
1417
1418 lockdep_assert_held(&priv->mutex);
1419
1420 sta_id = iwl_sta_id(sta);
1421 if (sta_id == IWL_INVALID_STATION)
1422 return -ENXIO;
1423
1424 spin_lock_bh(&priv->sta_lock);
1425 priv->stations[sta_id].sta.station_flags_msk = 0;
1426 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1427 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1428 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1429 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1430 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1431 spin_unlock_bh(&priv->sta_lock);
1432
1433 return iwl_send_add_sta(priv, &sta_cmd, 0);
1434 }
1435
1436 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1437 int tid)
1438 {
1439 int sta_id;
1440 struct iwl_addsta_cmd sta_cmd;
1441
1442 lockdep_assert_held(&priv->mutex);
1443
1444 sta_id = iwl_sta_id(sta);
1445 if (sta_id == IWL_INVALID_STATION) {
1446 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1447 return -ENXIO;
1448 }
1449
1450 spin_lock_bh(&priv->sta_lock);
1451 priv->stations[sta_id].sta.station_flags_msk = 0;
1452 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1453 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1454 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1455 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1456 spin_unlock_bh(&priv->sta_lock);
1457
1458 return iwl_send_add_sta(priv, &sta_cmd, 0);
1459 }
1460
1461
1462
1463 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1464 {
1465 struct iwl_addsta_cmd cmd = {
1466 .mode = STA_CONTROL_MODIFY_MSK,
1467 .station_flags = STA_FLG_PWR_SAVE_MSK,
1468 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1469 .sta.sta_id = sta_id,
1470 .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK,
1471 .sleep_tx_count = cpu_to_le16(cnt),
1472 };
1473
1474 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1475 }
Linux kernel - Deliverables
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