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 <linuxwifi@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
iwl_sta_ucode_activate(struct iwl_priv * priv,u8 sta_id)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
iwl_process_add_sta_resp(struct iwl_priv * priv,struct iwl_rx_packet * pkt)63 static void iwl_process_add_sta_resp(struct iwl_priv *priv,
64 struct iwl_rx_packet *pkt)
65 {
66 struct iwl_add_sta_resp *add_sta_resp = (void *)pkt->data;
67
68 IWL_DEBUG_INFO(priv, "Processing response for adding station\n");
69
70 spin_lock_bh(&priv->sta_lock);
71
72 switch (add_sta_resp->status) {
73 case ADD_STA_SUCCESS_MSK:
74 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
75 break;
76 case ADD_STA_NO_ROOM_IN_TABLE:
77 IWL_ERR(priv, "Adding station failed, no room in table.\n");
78 break;
79 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
80 IWL_ERR(priv,
81 "Adding station failed, no block ack resource.\n");
82 break;
83 case ADD_STA_MODIFY_NON_EXIST_STA:
84 IWL_ERR(priv, "Attempting to modify non-existing station\n");
85 break;
86 default:
87 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
88 add_sta_resp->status);
89 break;
90 }
91
92 spin_unlock_bh(&priv->sta_lock);
93 }
94
iwl_add_sta_callback(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)95 void iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
96 {
97 struct iwl_rx_packet *pkt = rxb_addr(rxb);
98
99 iwl_process_add_sta_resp(priv, pkt);
100 }
101
iwl_send_add_sta(struct iwl_priv * priv,struct iwl_addsta_cmd * sta,u8 flags)102 int iwl_send_add_sta(struct iwl_priv *priv,
103 struct iwl_addsta_cmd *sta, u8 flags)
104 {
105 int ret = 0;
106 struct iwl_host_cmd cmd = {
107 .id = REPLY_ADD_STA,
108 .flags = flags,
109 .data = { sta, },
110 .len = { sizeof(*sta), },
111 };
112 u8 sta_id __maybe_unused = sta->sta.sta_id;
113 struct iwl_rx_packet *pkt;
114 struct iwl_add_sta_resp *add_sta_resp;
115
116 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
117 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
118
119 if (!(flags & CMD_ASYNC)) {
120 cmd.flags |= CMD_WANT_SKB;
121 might_sleep();
122 }
123
124 ret = iwl_dvm_send_cmd(priv, &cmd);
125
126 if (ret || (flags & CMD_ASYNC))
127 return ret;
128
129 pkt = cmd.resp_pkt;
130 add_sta_resp = (void *)pkt->data;
131
132 /* debug messages are printed in the handler */
133 if (add_sta_resp->status == ADD_STA_SUCCESS_MSK) {
134 spin_lock_bh(&priv->sta_lock);
135 ret = iwl_sta_ucode_activate(priv, sta_id);
136 spin_unlock_bh(&priv->sta_lock);
137 } else {
138 ret = -EIO;
139 }
140
141 iwl_free_resp(&cmd);
142
143 return ret;
144 }
145
iwl_is_ht40_tx_allowed(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_sta * sta)146 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
147 struct iwl_rxon_context *ctx,
148 struct ieee80211_sta *sta)
149 {
150 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
151 return false;
152
153 #ifdef CONFIG_IWLWIFI_DEBUGFS
154 if (priv->disable_ht40)
155 return false;
156 #endif
157
158 /* special case for RXON */
159 if (!sta)
160 return true;
161
162 return sta->bandwidth >= IEEE80211_STA_RX_BW_40;
163 }
164
iwl_sta_calc_ht_flags(struct iwl_priv * priv,struct ieee80211_sta * sta,struct iwl_rxon_context * ctx,__le32 * flags,__le32 * mask)165 static void iwl_sta_calc_ht_flags(struct iwl_priv *priv,
166 struct ieee80211_sta *sta,
167 struct iwl_rxon_context *ctx,
168 __le32 *flags, __le32 *mask)
169 {
170 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
171
172 *mask = STA_FLG_RTS_MIMO_PROT_MSK |
173 STA_FLG_MIMO_DIS_MSK |
174 STA_FLG_HT40_EN_MSK |
175 STA_FLG_MAX_AGG_SIZE_MSK |
176 STA_FLG_AGG_MPDU_DENSITY_MSK;
177 *flags = 0;
178
179 if (!sta || !sta_ht_inf->ht_supported)
180 return;
181
182 IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n",
183 sta->addr,
184 (sta->smps_mode == IEEE80211_SMPS_STATIC) ?
185 "static" :
186 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ?
187 "dynamic" : "disabled");
188
189 switch (sta->smps_mode) {
190 case IEEE80211_SMPS_STATIC:
191 *flags |= STA_FLG_MIMO_DIS_MSK;
192 break;
193 case IEEE80211_SMPS_DYNAMIC:
194 *flags |= STA_FLG_RTS_MIMO_PROT_MSK;
195 break;
196 case IEEE80211_SMPS_OFF:
197 break;
198 default:
199 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", sta->smps_mode);
200 break;
201 }
202
203 *flags |= cpu_to_le32(
204 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
205
206 *flags |= cpu_to_le32(
207 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
208
209 if (iwl_is_ht40_tx_allowed(priv, ctx, sta))
210 *flags |= STA_FLG_HT40_EN_MSK;
211 }
212
iwl_sta_update_ht(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_sta * sta)213 int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
214 struct ieee80211_sta *sta)
215 {
216 u8 sta_id = iwl_sta_id(sta);
217 __le32 flags, mask;
218 struct iwl_addsta_cmd cmd;
219
220 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
221 return -EINVAL;
222
223 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
224
225 spin_lock_bh(&priv->sta_lock);
226 priv->stations[sta_id].sta.station_flags &= ~mask;
227 priv->stations[sta_id].sta.station_flags |= flags;
228 spin_unlock_bh(&priv->sta_lock);
229
230 memset(&cmd, 0, sizeof(cmd));
231 cmd.mode = STA_CONTROL_MODIFY_MSK;
232 cmd.station_flags_msk = mask;
233 cmd.station_flags = flags;
234 cmd.sta.sta_id = sta_id;
235
236 return iwl_send_add_sta(priv, &cmd, 0);
237 }
238
iwl_set_ht_add_station(struct iwl_priv * priv,u8 index,struct ieee80211_sta * sta,struct iwl_rxon_context * ctx)239 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
240 struct ieee80211_sta *sta,
241 struct iwl_rxon_context *ctx)
242 {
243 __le32 flags, mask;
244
245 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
246
247 lockdep_assert_held(&priv->sta_lock);
248 priv->stations[index].sta.station_flags &= ~mask;
249 priv->stations[index].sta.station_flags |= flags;
250 }
251
252 /**
253 * iwl_prep_station - Prepare station information for addition
254 *
255 * should be called with sta_lock held
256 */
iwl_prep_station(struct iwl_priv * priv,struct iwl_rxon_context * ctx,const u8 * addr,bool is_ap,struct ieee80211_sta * sta)257 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
258 const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
259 {
260 struct iwl_station_entry *station;
261 int i;
262 u8 sta_id = IWL_INVALID_STATION;
263
264 if (is_ap)
265 sta_id = ctx->ap_sta_id;
266 else if (is_broadcast_ether_addr(addr))
267 sta_id = ctx->bcast_sta_id;
268 else
269 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
270 if (ether_addr_equal(priv->stations[i].sta.sta.addr,
271 addr)) {
272 sta_id = i;
273 break;
274 }
275
276 if (!priv->stations[i].used &&
277 sta_id == IWL_INVALID_STATION)
278 sta_id = i;
279 }
280
281 /*
282 * These two conditions have the same outcome, but keep them
283 * separate
284 */
285 if (unlikely(sta_id == IWL_INVALID_STATION))
286 return sta_id;
287
288 /*
289 * uCode is not able to deal with multiple requests to add a
290 * station. Keep track if one is in progress so that we do not send
291 * another.
292 */
293 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
294 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
295 "added.\n", sta_id);
296 return sta_id;
297 }
298
299 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
300 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
301 ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) {
302 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
303 "adding again.\n", sta_id, addr);
304 return sta_id;
305 }
306
307 station = &priv->stations[sta_id];
308 station->used = IWL_STA_DRIVER_ACTIVE;
309 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
310 sta_id, addr);
311 priv->num_stations++;
312
313 /* Set up the REPLY_ADD_STA command to send to device */
314 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
315 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
316 station->sta.mode = 0;
317 station->sta.sta.sta_id = sta_id;
318 station->sta.station_flags = ctx->station_flags;
319 station->ctxid = ctx->ctxid;
320
321 if (sta) {
322 struct iwl_station_priv *sta_priv;
323
324 sta_priv = (void *)sta->drv_priv;
325 sta_priv->ctx = ctx;
326 }
327
328 /*
329 * OK to call unconditionally, since local stations (IBSS BSSID
330 * STA and broadcast STA) pass in a NULL sta, and mac80211
331 * doesn't allow HT IBSS.
332 */
333 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
334
335 return sta_id;
336
337 }
338
339 #define STA_WAIT_TIMEOUT (HZ/2)
340
341 /**
342 * iwl_add_station_common -
343 */
iwl_add_station_common(struct iwl_priv * priv,struct iwl_rxon_context * ctx,const u8 * addr,bool is_ap,struct ieee80211_sta * sta,u8 * sta_id_r)344 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
345 const u8 *addr, bool is_ap,
346 struct ieee80211_sta *sta, u8 *sta_id_r)
347 {
348 int ret = 0;
349 u8 sta_id;
350 struct iwl_addsta_cmd sta_cmd;
351
352 *sta_id_r = 0;
353 spin_lock_bh(&priv->sta_lock);
354 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
355 if (sta_id == IWL_INVALID_STATION) {
356 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
357 addr);
358 spin_unlock_bh(&priv->sta_lock);
359 return -EINVAL;
360 }
361
362 /*
363 * uCode is not able to deal with multiple requests to add a
364 * station. Keep track if one is in progress so that we do not send
365 * another.
366 */
367 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
368 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
369 "added.\n", sta_id);
370 spin_unlock_bh(&priv->sta_lock);
371 return -EEXIST;
372 }
373
374 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
375 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
376 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
377 "adding again.\n", sta_id, addr);
378 spin_unlock_bh(&priv->sta_lock);
379 return -EEXIST;
380 }
381
382 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
383 memcpy(&sta_cmd, &priv->stations[sta_id].sta,
384 sizeof(struct iwl_addsta_cmd));
385 spin_unlock_bh(&priv->sta_lock);
386
387 /* Add station to device's station table */
388 ret = iwl_send_add_sta(priv, &sta_cmd, 0);
389 if (ret) {
390 spin_lock_bh(&priv->sta_lock);
391 IWL_ERR(priv, "Adding station %pM failed.\n",
392 priv->stations[sta_id].sta.sta.addr);
393 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
394 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
395 spin_unlock_bh(&priv->sta_lock);
396 }
397 *sta_id_r = sta_id;
398 return ret;
399 }
400
401 /**
402 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
403 */
iwl_sta_ucode_deactivate(struct iwl_priv * priv,u8 sta_id)404 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
405 {
406 lockdep_assert_held(&priv->sta_lock);
407
408 /* Ucode must be active and driver must be non active */
409 if ((priv->stations[sta_id].used &
410 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
411 IWL_STA_UCODE_ACTIVE)
412 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
413
414 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
415
416 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
417 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
418 }
419
iwl_send_remove_station(struct iwl_priv * priv,const u8 * addr,int sta_id,bool temporary)420 static int iwl_send_remove_station(struct iwl_priv *priv,
421 const u8 *addr, int sta_id,
422 bool temporary)
423 {
424 struct iwl_rx_packet *pkt;
425 int ret;
426 struct iwl_rem_sta_cmd rm_sta_cmd;
427 struct iwl_rem_sta_resp *rem_sta_resp;
428
429 struct iwl_host_cmd cmd = {
430 .id = REPLY_REMOVE_STA,
431 .len = { sizeof(struct iwl_rem_sta_cmd), },
432 .data = { &rm_sta_cmd, },
433 };
434
435 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
436 rm_sta_cmd.num_sta = 1;
437 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
438
439 cmd.flags |= CMD_WANT_SKB;
440
441 ret = iwl_dvm_send_cmd(priv, &cmd);
442
443 if (ret)
444 return ret;
445
446 pkt = cmd.resp_pkt;
447 rem_sta_resp = (void *)pkt->data;
448
449 switch (rem_sta_resp->status) {
450 case REM_STA_SUCCESS_MSK:
451 if (!temporary) {
452 spin_lock_bh(&priv->sta_lock);
453 iwl_sta_ucode_deactivate(priv, sta_id);
454 spin_unlock_bh(&priv->sta_lock);
455 }
456 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
457 break;
458 default:
459 ret = -EIO;
460 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
461 break;
462 }
463
464 iwl_free_resp(&cmd);
465
466 return ret;
467 }
468
469 /**
470 * iwl_remove_station - Remove driver's knowledge of station.
471 */
iwl_remove_station(struct iwl_priv * priv,const u8 sta_id,const u8 * addr)472 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
473 const u8 *addr)
474 {
475 u8 tid;
476
477 if (!iwl_is_ready(priv)) {
478 IWL_DEBUG_INFO(priv,
479 "Unable to remove station %pM, device not ready.\n",
480 addr);
481 /*
482 * It is typical for stations to be removed when we are
483 * going down. Return success since device will be down
484 * soon anyway
485 */
486 return 0;
487 }
488
489 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
490 sta_id, addr);
491
492 if (WARN_ON(sta_id == IWL_INVALID_STATION))
493 return -EINVAL;
494
495 spin_lock_bh(&priv->sta_lock);
496
497 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
498 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
499 addr);
500 goto out_err;
501 }
502
503 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
504 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
505 addr);
506 goto out_err;
507 }
508
509 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
510 kfree(priv->stations[sta_id].lq);
511 priv->stations[sta_id].lq = NULL;
512 }
513
514 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
515 memset(&priv->tid_data[sta_id][tid], 0,
516 sizeof(priv->tid_data[sta_id][tid]));
517
518 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
519
520 priv->num_stations--;
521
522 if (WARN_ON(priv->num_stations < 0))
523 priv->num_stations = 0;
524
525 spin_unlock_bh(&priv->sta_lock);
526
527 return iwl_send_remove_station(priv, addr, sta_id, false);
528 out_err:
529 spin_unlock_bh(&priv->sta_lock);
530 return -EINVAL;
531 }
532
iwl_deactivate_station(struct iwl_priv * priv,const u8 sta_id,const u8 * addr)533 void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
534 const u8 *addr)
535 {
536 u8 tid;
537
538 if (!iwl_is_ready(priv)) {
539 IWL_DEBUG_INFO(priv,
540 "Unable to remove station %pM, device not ready.\n",
541 addr);
542 return;
543 }
544
545 IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id);
546
547 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
548 return;
549
550 spin_lock_bh(&priv->sta_lock);
551
552 WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE));
553
554 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
555 memset(&priv->tid_data[sta_id][tid], 0,
556 sizeof(priv->tid_data[sta_id][tid]));
557
558 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
559 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
560
561 priv->num_stations--;
562
563 if (WARN_ON_ONCE(priv->num_stations < 0))
564 priv->num_stations = 0;
565
566 spin_unlock_bh(&priv->sta_lock);
567 }
568
iwl_sta_fill_lq(struct iwl_priv * priv,struct iwl_rxon_context * ctx,u8 sta_id,struct iwl_link_quality_cmd * link_cmd)569 static void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
570 u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
571 {
572 int i, r;
573 u32 rate_flags = 0;
574 __le32 rate_n_flags;
575
576 lockdep_assert_held(&priv->mutex);
577
578 memset(link_cmd, 0, sizeof(*link_cmd));
579
580 /* Set up the rate scaling to start at selected rate, fall back
581 * all the way down to 1M in IEEE order, and then spin on 1M */
582 if (priv->band == NL80211_BAND_5GHZ)
583 r = IWL_RATE_6M_INDEX;
584 else if (ctx && ctx->vif && ctx->vif->p2p)
585 r = IWL_RATE_6M_INDEX;
586 else
587 r = IWL_RATE_1M_INDEX;
588
589 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
590 rate_flags |= RATE_MCS_CCK_MSK;
591
592 rate_flags |= first_antenna(priv->nvm_data->valid_tx_ant) <<
593 RATE_MCS_ANT_POS;
594 rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
595 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
596 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
597
598 link_cmd->general_params.single_stream_ant_msk =
599 first_antenna(priv->nvm_data->valid_tx_ant);
600
601 link_cmd->general_params.dual_stream_ant_msk =
602 priv->nvm_data->valid_tx_ant &
603 ~first_antenna(priv->nvm_data->valid_tx_ant);
604 if (!link_cmd->general_params.dual_stream_ant_msk) {
605 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
606 } else if (num_of_ant(priv->nvm_data->valid_tx_ant) == 2) {
607 link_cmd->general_params.dual_stream_ant_msk =
608 priv->nvm_data->valid_tx_ant;
609 }
610
611 link_cmd->agg_params.agg_dis_start_th =
612 LINK_QUAL_AGG_DISABLE_START_DEF;
613 link_cmd->agg_params.agg_time_limit =
614 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
615
616 link_cmd->sta_id = sta_id;
617 }
618
619 /**
620 * iwl_clear_ucode_stations - clear ucode station table bits
621 *
622 * This function clears all the bits in the driver indicating
623 * which stations are active in the ucode. Call when something
624 * other than explicit station management would cause this in
625 * the ucode, e.g. unassociated RXON.
626 */
iwl_clear_ucode_stations(struct iwl_priv * priv,struct iwl_rxon_context * ctx)627 void iwl_clear_ucode_stations(struct iwl_priv *priv,
628 struct iwl_rxon_context *ctx)
629 {
630 int i;
631 bool cleared = false;
632
633 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
634
635 spin_lock_bh(&priv->sta_lock);
636 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
637 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
638 continue;
639
640 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
641 IWL_DEBUG_INFO(priv,
642 "Clearing ucode active for station %d\n", i);
643 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
644 cleared = true;
645 }
646 }
647 spin_unlock_bh(&priv->sta_lock);
648
649 if (!cleared)
650 IWL_DEBUG_INFO(priv,
651 "No active stations found to be cleared\n");
652 }
653
654 /**
655 * iwl_restore_stations() - Restore driver known stations to device
656 *
657 * All stations considered active by driver, but not present in ucode, is
658 * restored.
659 *
660 * Function sleeps.
661 */
iwl_restore_stations(struct iwl_priv * priv,struct iwl_rxon_context * ctx)662 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
663 {
664 struct iwl_addsta_cmd sta_cmd;
665 static const struct iwl_link_quality_cmd zero_lq = {};
666 struct iwl_link_quality_cmd lq;
667 int i;
668 bool found = false;
669 int ret;
670 bool send_lq;
671
672 if (!iwl_is_ready(priv)) {
673 IWL_DEBUG_INFO(priv,
674 "Not ready yet, not restoring any stations.\n");
675 return;
676 }
677
678 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
679 spin_lock_bh(&priv->sta_lock);
680 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
681 if (ctx->ctxid != priv->stations[i].ctxid)
682 continue;
683 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
684 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
685 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
686 priv->stations[i].sta.sta.addr);
687 priv->stations[i].sta.mode = 0;
688 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
689 found = true;
690 }
691 }
692
693 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
694 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
695 memcpy(&sta_cmd, &priv->stations[i].sta,
696 sizeof(struct iwl_addsta_cmd));
697 send_lq = false;
698 if (priv->stations[i].lq) {
699 if (priv->wowlan)
700 iwl_sta_fill_lq(priv, ctx, i, &lq);
701 else
702 memcpy(&lq, priv->stations[i].lq,
703 sizeof(struct iwl_link_quality_cmd));
704
705 if (memcmp(&lq, &zero_lq, sizeof(lq)))
706 send_lq = true;
707 }
708 spin_unlock_bh(&priv->sta_lock);
709 ret = iwl_send_add_sta(priv, &sta_cmd, 0);
710 if (ret) {
711 spin_lock_bh(&priv->sta_lock);
712 IWL_ERR(priv, "Adding station %pM failed.\n",
713 priv->stations[i].sta.sta.addr);
714 priv->stations[i].used &=
715 ~IWL_STA_DRIVER_ACTIVE;
716 priv->stations[i].used &=
717 ~IWL_STA_UCODE_INPROGRESS;
718 continue;
719 }
720 /*
721 * Rate scaling has already been initialized, send
722 * current LQ command
723 */
724 if (send_lq)
725 iwl_send_lq_cmd(priv, ctx, &lq, 0, true);
726 spin_lock_bh(&priv->sta_lock);
727 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
728 }
729 }
730
731 spin_unlock_bh(&priv->sta_lock);
732 if (!found)
733 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
734 "no stations to be restored.\n");
735 else
736 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
737 "complete.\n");
738 }
739
iwl_get_free_ucode_key_offset(struct iwl_priv * priv)740 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
741 {
742 int i;
743
744 for (i = 0; i < priv->sta_key_max_num; i++)
745 if (!test_and_set_bit(i, &priv->ucode_key_table))
746 return i;
747
748 return WEP_INVALID_OFFSET;
749 }
750
iwl_dealloc_bcast_stations(struct iwl_priv * priv)751 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
752 {
753 int i;
754
755 spin_lock_bh(&priv->sta_lock);
756 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
757 if (!(priv->stations[i].used & IWL_STA_BCAST))
758 continue;
759
760 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
761 priv->num_stations--;
762 if (WARN_ON(priv->num_stations < 0))
763 priv->num_stations = 0;
764 kfree(priv->stations[i].lq);
765 priv->stations[i].lq = NULL;
766 }
767 spin_unlock_bh(&priv->sta_lock);
768 }
769
770 #ifdef CONFIG_IWLWIFI_DEBUG
iwl_dump_lq_cmd(struct iwl_priv * priv,struct iwl_link_quality_cmd * lq)771 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
772 struct iwl_link_quality_cmd *lq)
773 {
774 int i;
775 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
776 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
777 lq->general_params.single_stream_ant_msk,
778 lq->general_params.dual_stream_ant_msk);
779
780 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
781 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
782 i, lq->rs_table[i].rate_n_flags);
783 }
784 #else
iwl_dump_lq_cmd(struct iwl_priv * priv,struct iwl_link_quality_cmd * lq)785 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
786 struct iwl_link_quality_cmd *lq)
787 {
788 }
789 #endif
790
791 /**
792 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
793 *
794 * It sometimes happens when a HT rate has been in use and we
795 * loose connectivity with AP then mac80211 will first tell us that the
796 * current channel is not HT anymore before removing the station. In such a
797 * scenario the RXON flags will be updated to indicate we are not
798 * communicating HT anymore, but the LQ command may still contain HT rates.
799 * Test for this to prevent driver from sending LQ command between the time
800 * RXON flags are updated and when LQ command is updated.
801 */
is_lq_table_valid(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct iwl_link_quality_cmd * lq)802 static bool is_lq_table_valid(struct iwl_priv *priv,
803 struct iwl_rxon_context *ctx,
804 struct iwl_link_quality_cmd *lq)
805 {
806 int i;
807
808 if (ctx->ht.enabled)
809 return true;
810
811 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
812 ctx->active.channel);
813 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
814 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
815 RATE_MCS_HT_MSK) {
816 IWL_DEBUG_INFO(priv,
817 "index %d of LQ expects HT channel\n",
818 i);
819 return false;
820 }
821 }
822 return true;
823 }
824
825 /**
826 * iwl_send_lq_cmd() - Send link quality command
827 * @init: This command is sent as part of station initialization right
828 * after station has been added.
829 *
830 * The link quality command is sent as the last step of station creation.
831 * This is the special case in which init is set and we call a callback in
832 * this case to clear the state indicating that station creation is in
833 * progress.
834 */
iwl_send_lq_cmd(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct iwl_link_quality_cmd * lq,u8 flags,bool init)835 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
836 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
837 {
838 int ret = 0;
839 struct iwl_host_cmd cmd = {
840 .id = REPLY_TX_LINK_QUALITY_CMD,
841 .len = { sizeof(struct iwl_link_quality_cmd), },
842 .flags = flags,
843 .data = { lq, },
844 };
845
846 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
847 return -EINVAL;
848
849
850 spin_lock_bh(&priv->sta_lock);
851 if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
852 spin_unlock_bh(&priv->sta_lock);
853 return -EINVAL;
854 }
855 spin_unlock_bh(&priv->sta_lock);
856
857 iwl_dump_lq_cmd(priv, lq);
858 if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
859 return -EINVAL;
860
861 if (is_lq_table_valid(priv, ctx, lq))
862 ret = iwl_dvm_send_cmd(priv, &cmd);
863 else
864 ret = -EINVAL;
865
866 if (cmd.flags & CMD_ASYNC)
867 return ret;
868
869 if (init) {
870 IWL_DEBUG_INFO(priv, "init LQ command complete, "
871 "clearing sta addition status for sta %d\n",
872 lq->sta_id);
873 spin_lock_bh(&priv->sta_lock);
874 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
875 spin_unlock_bh(&priv->sta_lock);
876 }
877 return ret;
878 }
879
880
881 static struct iwl_link_quality_cmd *
iwl_sta_alloc_lq(struct iwl_priv * priv,struct iwl_rxon_context * ctx,u8 sta_id)882 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
883 u8 sta_id)
884 {
885 struct iwl_link_quality_cmd *link_cmd;
886
887 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
888 if (!link_cmd) {
889 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
890 return NULL;
891 }
892
893 iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
894
895 return link_cmd;
896 }
897
898 /*
899 * iwlagn_add_bssid_station - Add the special IBSS BSSID station
900 *
901 * Function sleeps.
902 */
iwlagn_add_bssid_station(struct iwl_priv * priv,struct iwl_rxon_context * ctx,const u8 * addr,u8 * sta_id_r)903 int iwlagn_add_bssid_station(struct iwl_priv *priv,
904 struct iwl_rxon_context *ctx,
905 const u8 *addr, u8 *sta_id_r)
906 {
907 int ret;
908 u8 sta_id;
909 struct iwl_link_quality_cmd *link_cmd;
910
911 if (sta_id_r)
912 *sta_id_r = IWL_INVALID_STATION;
913
914 ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
915 if (ret) {
916 IWL_ERR(priv, "Unable to add station %pM\n", addr);
917 return ret;
918 }
919
920 if (sta_id_r)
921 *sta_id_r = sta_id;
922
923 spin_lock_bh(&priv->sta_lock);
924 priv->stations[sta_id].used |= IWL_STA_LOCAL;
925 spin_unlock_bh(&priv->sta_lock);
926
927 /* Set up default rate scaling table in device's station table */
928 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
929 if (!link_cmd) {
930 IWL_ERR(priv,
931 "Unable to initialize rate scaling for station %pM.\n",
932 addr);
933 return -ENOMEM;
934 }
935
936 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, 0, true);
937 if (ret)
938 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
939
940 spin_lock_bh(&priv->sta_lock);
941 priv->stations[sta_id].lq = link_cmd;
942 spin_unlock_bh(&priv->sta_lock);
943
944 return 0;
945 }
946
947 /*
948 * static WEP keys
949 *
950 * For each context, the device has a table of 4 static WEP keys
951 * (one for each key index) that is updated with the following
952 * commands.
953 */
954
iwl_send_static_wepkey_cmd(struct iwl_priv * priv,struct iwl_rxon_context * ctx,bool send_if_empty)955 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
956 struct iwl_rxon_context *ctx,
957 bool send_if_empty)
958 {
959 int i, not_empty = 0;
960 u8 buff[sizeof(struct iwl_wep_cmd) +
961 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
962 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
963 size_t cmd_size = sizeof(struct iwl_wep_cmd);
964 struct iwl_host_cmd cmd = {
965 .id = ctx->wep_key_cmd,
966 .data = { wep_cmd, },
967 };
968
969 might_sleep();
970
971 memset(wep_cmd, 0, cmd_size +
972 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
973
974 for (i = 0; i < WEP_KEYS_MAX ; i++) {
975 wep_cmd->key[i].key_index = i;
976 if (ctx->wep_keys[i].key_size) {
977 wep_cmd->key[i].key_offset = i;
978 not_empty = 1;
979 } else {
980 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
981 }
982
983 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
984 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
985 ctx->wep_keys[i].key_size);
986 }
987
988 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
989 wep_cmd->num_keys = WEP_KEYS_MAX;
990
991 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
992
993 cmd.len[0] = cmd_size;
994
995 if (not_empty || send_if_empty)
996 return iwl_dvm_send_cmd(priv, &cmd);
997 else
998 return 0;
999 }
1000
iwl_restore_default_wep_keys(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1001 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
1002 struct iwl_rxon_context *ctx)
1003 {
1004 lockdep_assert_held(&priv->mutex);
1005
1006 return iwl_send_static_wepkey_cmd(priv, ctx, false);
1007 }
1008
iwl_remove_default_wep_key(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_key_conf * keyconf)1009 int iwl_remove_default_wep_key(struct iwl_priv *priv,
1010 struct iwl_rxon_context *ctx,
1011 struct ieee80211_key_conf *keyconf)
1012 {
1013 int ret;
1014
1015 lockdep_assert_held(&priv->mutex);
1016
1017 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1018 keyconf->keyidx);
1019
1020 memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1021 if (iwl_is_rfkill(priv)) {
1022 IWL_DEBUG_WEP(priv,
1023 "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1024 /* but keys in device are clear anyway so return success */
1025 return 0;
1026 }
1027 ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1028 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1029 keyconf->keyidx, ret);
1030
1031 return ret;
1032 }
1033
iwl_set_default_wep_key(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_key_conf * keyconf)1034 int iwl_set_default_wep_key(struct iwl_priv *priv,
1035 struct iwl_rxon_context *ctx,
1036 struct ieee80211_key_conf *keyconf)
1037 {
1038 int ret;
1039
1040 lockdep_assert_held(&priv->mutex);
1041
1042 if (keyconf->keylen != WEP_KEY_LEN_128 &&
1043 keyconf->keylen != WEP_KEY_LEN_64) {
1044 IWL_DEBUG_WEP(priv,
1045 "Bad WEP key length %d\n", keyconf->keylen);
1046 return -EINVAL;
1047 }
1048
1049 keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1050
1051 ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1052 memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1053 keyconf->keylen);
1054
1055 ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1056 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1057 keyconf->keylen, keyconf->keyidx, ret);
1058
1059 return ret;
1060 }
1061
1062 /*
1063 * dynamic (per-station) keys
1064 *
1065 * The dynamic keys are a little more complicated. The device has
1066 * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1067 * These are linked to stations by a table that contains an index
1068 * into the key table for each station/key index/{mcast,unicast},
1069 * i.e. it's basically an array of pointers like this:
1070 * key_offset_t key_mapping[NUM_STATIONS][4][2];
1071 * (it really works differently, but you can think of it as such)
1072 *
1073 * The key uploading and linking happens in the same command, the
1074 * add station command with STA_MODIFY_KEY_MASK.
1075 */
1076
iwlagn_key_sta_id(struct iwl_priv * priv,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1077 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1078 struct ieee80211_vif *vif,
1079 struct ieee80211_sta *sta)
1080 {
1081 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1082
1083 if (sta)
1084 return iwl_sta_id(sta);
1085
1086 /*
1087 * The device expects GTKs for station interfaces to be
1088 * installed as GTKs for the AP station. If we have no
1089 * station ID, then use the ap_sta_id in that case.
1090 */
1091 if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
1092 return vif_priv->ctx->ap_sta_id;
1093
1094 return IWL_INVALID_STATION;
1095 }
1096
iwlagn_send_sta_key(struct iwl_priv * priv,struct ieee80211_key_conf * keyconf,u8 sta_id,u32 tkip_iv32,u16 * tkip_p1k,u32 cmd_flags)1097 static int iwlagn_send_sta_key(struct iwl_priv *priv,
1098 struct ieee80211_key_conf *keyconf,
1099 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1100 u32 cmd_flags)
1101 {
1102 __le16 key_flags;
1103 struct iwl_addsta_cmd sta_cmd;
1104 int i;
1105
1106 spin_lock_bh(&priv->sta_lock);
1107 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1108 spin_unlock_bh(&priv->sta_lock);
1109
1110 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1111 key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1112
1113 switch (keyconf->cipher) {
1114 case WLAN_CIPHER_SUITE_CCMP:
1115 key_flags |= STA_KEY_FLG_CCMP;
1116 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1117 break;
1118 case WLAN_CIPHER_SUITE_TKIP:
1119 key_flags |= STA_KEY_FLG_TKIP;
1120 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1121 for (i = 0; i < 5; i++)
1122 sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1123 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1124 break;
1125 case WLAN_CIPHER_SUITE_WEP104:
1126 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1127 /* fall through */
1128 case WLAN_CIPHER_SUITE_WEP40:
1129 key_flags |= STA_KEY_FLG_WEP;
1130 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1131 break;
1132 default:
1133 WARN_ON(1);
1134 return -EINVAL;
1135 }
1136
1137 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1138 key_flags |= STA_KEY_MULTICAST_MSK;
1139
1140 /* key pointer (offset) */
1141 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1142
1143 sta_cmd.key.key_flags = key_flags;
1144 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1145 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1146
1147 return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1148 }
1149
iwl_update_tkip_key(struct iwl_priv * priv,struct ieee80211_vif * vif,struct ieee80211_key_conf * keyconf,struct ieee80211_sta * sta,u32 iv32,u16 * phase1key)1150 void iwl_update_tkip_key(struct iwl_priv *priv,
1151 struct ieee80211_vif *vif,
1152 struct ieee80211_key_conf *keyconf,
1153 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1154 {
1155 u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1156
1157 if (sta_id == IWL_INVALID_STATION)
1158 return;
1159
1160 if (iwl_scan_cancel(priv)) {
1161 /* cancel scan failed, just live w/ bad key and rely
1162 briefly on SW decryption */
1163 return;
1164 }
1165
1166 iwlagn_send_sta_key(priv, keyconf, sta_id,
1167 iv32, phase1key, CMD_ASYNC);
1168 }
1169
iwl_remove_dynamic_key(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_key_conf * keyconf,struct ieee80211_sta * sta)1170 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1171 struct iwl_rxon_context *ctx,
1172 struct ieee80211_key_conf *keyconf,
1173 struct ieee80211_sta *sta)
1174 {
1175 struct iwl_addsta_cmd sta_cmd;
1176 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1177 __le16 key_flags;
1178
1179 /* if station isn't there, neither is the key */
1180 if (sta_id == IWL_INVALID_STATION)
1181 return -ENOENT;
1182
1183 spin_lock_bh(&priv->sta_lock);
1184 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1185 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1186 sta_id = IWL_INVALID_STATION;
1187 spin_unlock_bh(&priv->sta_lock);
1188
1189 if (sta_id == IWL_INVALID_STATION)
1190 return 0;
1191
1192 lockdep_assert_held(&priv->mutex);
1193
1194 ctx->key_mapping_keys--;
1195
1196 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1197 keyconf->keyidx, sta_id);
1198
1199 if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1200 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1201 keyconf->hw_key_idx);
1202
1203 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1204 key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
1205 STA_KEY_FLG_INVALID;
1206
1207 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1208 key_flags |= STA_KEY_MULTICAST_MSK;
1209
1210 sta_cmd.key.key_flags = key_flags;
1211 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1212 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1213 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1214
1215 return iwl_send_add_sta(priv, &sta_cmd, 0);
1216 }
1217
iwl_set_dynamic_key(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_key_conf * keyconf,struct ieee80211_sta * sta)1218 int iwl_set_dynamic_key(struct iwl_priv *priv,
1219 struct iwl_rxon_context *ctx,
1220 struct ieee80211_key_conf *keyconf,
1221 struct ieee80211_sta *sta)
1222 {
1223 struct ieee80211_key_seq seq;
1224 u16 p1k[5];
1225 int ret;
1226 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1227 const u8 *addr;
1228
1229 if (sta_id == IWL_INVALID_STATION)
1230 return -EINVAL;
1231
1232 lockdep_assert_held(&priv->mutex);
1233
1234 keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1235 if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1236 return -ENOSPC;
1237
1238 ctx->key_mapping_keys++;
1239
1240 switch (keyconf->cipher) {
1241 case WLAN_CIPHER_SUITE_TKIP:
1242 if (sta)
1243 addr = sta->addr;
1244 else /* station mode case only */
1245 addr = ctx->active.bssid_addr;
1246
1247 /* pre-fill phase 1 key into device cache */
1248 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1249 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1250 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1251 seq.tkip.iv32, p1k, 0);
1252 break;
1253 case WLAN_CIPHER_SUITE_CCMP:
1254 case WLAN_CIPHER_SUITE_WEP40:
1255 case WLAN_CIPHER_SUITE_WEP104:
1256 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1257 0, NULL, 0);
1258 break;
1259 default:
1260 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1261 ret = -EINVAL;
1262 }
1263
1264 if (ret) {
1265 ctx->key_mapping_keys--;
1266 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1267 }
1268
1269 IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1270 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1271 sta ? sta->addr : NULL, ret);
1272
1273 return ret;
1274 }
1275
1276 /**
1277 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1278 *
1279 * This adds the broadcast station into the driver's station table
1280 * and marks it driver active, so that it will be restored to the
1281 * device at the next best time.
1282 */
iwlagn_alloc_bcast_station(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1283 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1284 struct iwl_rxon_context *ctx)
1285 {
1286 struct iwl_link_quality_cmd *link_cmd;
1287 u8 sta_id;
1288
1289 spin_lock_bh(&priv->sta_lock);
1290 sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1291 if (sta_id == IWL_INVALID_STATION) {
1292 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1293 spin_unlock_bh(&priv->sta_lock);
1294
1295 return -EINVAL;
1296 }
1297
1298 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1299 priv->stations[sta_id].used |= IWL_STA_BCAST;
1300 spin_unlock_bh(&priv->sta_lock);
1301
1302 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1303 if (!link_cmd) {
1304 IWL_ERR(priv,
1305 "Unable to initialize rate scaling for bcast station.\n");
1306 return -ENOMEM;
1307 }
1308
1309 spin_lock_bh(&priv->sta_lock);
1310 priv->stations[sta_id].lq = link_cmd;
1311 spin_unlock_bh(&priv->sta_lock);
1312
1313 return 0;
1314 }
1315
1316 /**
1317 * iwl_update_bcast_station - update broadcast station's LQ command
1318 *
1319 * Only used by iwlagn. Placed here to have all bcast station management
1320 * code together.
1321 */
iwl_update_bcast_station(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1322 int iwl_update_bcast_station(struct iwl_priv *priv,
1323 struct iwl_rxon_context *ctx)
1324 {
1325 struct iwl_link_quality_cmd *link_cmd;
1326 u8 sta_id = ctx->bcast_sta_id;
1327
1328 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1329 if (!link_cmd) {
1330 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1331 return -ENOMEM;
1332 }
1333
1334 spin_lock_bh(&priv->sta_lock);
1335 if (priv->stations[sta_id].lq)
1336 kfree(priv->stations[sta_id].lq);
1337 else
1338 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1339 priv->stations[sta_id].lq = link_cmd;
1340 spin_unlock_bh(&priv->sta_lock);
1341
1342 return 0;
1343 }
1344
iwl_update_bcast_stations(struct iwl_priv * priv)1345 int iwl_update_bcast_stations(struct iwl_priv *priv)
1346 {
1347 struct iwl_rxon_context *ctx;
1348 int ret = 0;
1349
1350 for_each_context(priv, ctx) {
1351 ret = iwl_update_bcast_station(priv, ctx);
1352 if (ret)
1353 break;
1354 }
1355
1356 return ret;
1357 }
1358
1359 /**
1360 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1361 */
iwl_sta_tx_modify_enable_tid(struct iwl_priv * priv,int sta_id,int tid)1362 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1363 {
1364 struct iwl_addsta_cmd sta_cmd;
1365
1366 lockdep_assert_held(&priv->mutex);
1367
1368 /* Remove "disable" flag, to enable Tx for this TID */
1369 spin_lock_bh(&priv->sta_lock);
1370 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1371 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1372 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1373 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1374 spin_unlock_bh(&priv->sta_lock);
1375
1376 return iwl_send_add_sta(priv, &sta_cmd, 0);
1377 }
1378
iwl_sta_rx_agg_start(struct iwl_priv * priv,struct ieee80211_sta * sta,int tid,u16 ssn)1379 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1380 int tid, u16 ssn)
1381 {
1382 int sta_id;
1383 struct iwl_addsta_cmd sta_cmd;
1384
1385 lockdep_assert_held(&priv->mutex);
1386
1387 sta_id = iwl_sta_id(sta);
1388 if (sta_id == IWL_INVALID_STATION)
1389 return -ENXIO;
1390
1391 spin_lock_bh(&priv->sta_lock);
1392 priv->stations[sta_id].sta.station_flags_msk = 0;
1393 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1394 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1395 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1396 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1397 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1398 spin_unlock_bh(&priv->sta_lock);
1399
1400 return iwl_send_add_sta(priv, &sta_cmd, 0);
1401 }
1402
iwl_sta_rx_agg_stop(struct iwl_priv * priv,struct ieee80211_sta * sta,int tid)1403 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1404 int tid)
1405 {
1406 int sta_id;
1407 struct iwl_addsta_cmd sta_cmd;
1408
1409 lockdep_assert_held(&priv->mutex);
1410
1411 sta_id = iwl_sta_id(sta);
1412 if (sta_id == IWL_INVALID_STATION) {
1413 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1414 return -ENXIO;
1415 }
1416
1417 spin_lock_bh(&priv->sta_lock);
1418 priv->stations[sta_id].sta.station_flags_msk = 0;
1419 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1420 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1421 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1422 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1423 spin_unlock_bh(&priv->sta_lock);
1424
1425 return iwl_send_add_sta(priv, &sta_cmd, 0);
1426 }
1427
1428
1429
iwl_sta_modify_sleep_tx_count(struct iwl_priv * priv,int sta_id,int cnt)1430 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1431 {
1432 struct iwl_addsta_cmd cmd = {
1433 .mode = STA_CONTROL_MODIFY_MSK,
1434 .station_flags = STA_FLG_PWR_SAVE_MSK,
1435 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1436 .sta.sta_id = sta_id,
1437 .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK,
1438 .sleep_tx_count = cpu_to_le16(cnt),
1439 };
1440
1441 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1442 }
1443
