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1// SPDX-License-Identifier: GPL-2.0-only
2/******************************************************************************
3 *
4 * Copyright(c) 2003 - 2014, 2022 Intel Corporation. All rights reserved.
5 *
6 * Portions of this file are derived from the ipw3945 project, as well
7 * as portions of the ieee80211 subsystem header files.
8 *****************************************************************************/
9#include <linux/etherdevice.h>
10#include <net/mac80211.h>
11#include "iwl-trans.h"
12#include "dev.h"
13#include "agn.h"
14
15const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
16
17static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
18{
19 lockdep_assert_held(&priv->sta_lock);
20
21 if (sta_id >= IWLAGN_STATION_COUNT) {
22 IWL_ERR(priv, "invalid sta_id %u\n", sta_id);
23 return -EINVAL;
24 }
25 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
26 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
27 "addr %pM\n",
28 sta_id, priv->stations[sta_id].sta.sta.addr);
29
30 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
31 IWL_DEBUG_ASSOC(priv,
32 "STA id %u addr %pM already present in uCode "
33 "(according to driver)\n",
34 sta_id, priv->stations[sta_id].sta.sta.addr);
35 } else {
36 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
37 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
38 sta_id, priv->stations[sta_id].sta.sta.addr);
39 }
40 return 0;
41}
42
43static void iwl_process_add_sta_resp(struct iwl_priv *priv,
44 struct iwl_rx_packet *pkt)
45{
46 struct iwl_add_sta_resp *add_sta_resp = (void *)pkt->data;
47
48 IWL_DEBUG_INFO(priv, "Processing response for adding station\n");
49
50 spin_lock_bh(&priv->sta_lock);
51
52 switch (add_sta_resp->status) {
53 case ADD_STA_SUCCESS_MSK:
54 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
55 break;
56 case ADD_STA_NO_ROOM_IN_TABLE:
57 IWL_ERR(priv, "Adding station failed, no room in table.\n");
58 break;
59 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
60 IWL_ERR(priv,
61 "Adding station failed, no block ack resource.\n");
62 break;
63 case ADD_STA_MODIFY_NON_EXIST_STA:
64 IWL_ERR(priv, "Attempting to modify non-existing station\n");
65 break;
66 default:
67 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
68 add_sta_resp->status);
69 break;
70 }
71
72 spin_unlock_bh(&priv->sta_lock);
73}
74
75void iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
76{
77 struct iwl_rx_packet *pkt = rxb_addr(rxb);
78
79 iwl_process_add_sta_resp(priv, pkt);
80}
81
82int iwl_send_add_sta(struct iwl_priv *priv,
83 struct iwl_addsta_cmd *sta, u8 flags)
84{
85 int ret = 0;
86 struct iwl_host_cmd cmd = {
87 .id = REPLY_ADD_STA,
88 .flags = flags,
89 .data = { sta, },
90 .len = { sizeof(*sta), },
91 };
92 u8 sta_id __maybe_unused = sta->sta.sta_id;
93 struct iwl_rx_packet *pkt;
94 struct iwl_add_sta_resp *add_sta_resp;
95
96 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
97 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
98
99 if (!(flags & CMD_ASYNC)) {
100 cmd.flags |= CMD_WANT_SKB;
101 might_sleep();
102 }
103
104 ret = iwl_dvm_send_cmd(priv, &cmd);
105
106 if (ret || (flags & CMD_ASYNC))
107 return ret;
108
109 pkt = cmd.resp_pkt;
110 add_sta_resp = (void *)pkt->data;
111
112 /* debug messages are printed in the handler */
113 if (add_sta_resp->status == ADD_STA_SUCCESS_MSK) {
114 spin_lock_bh(&priv->sta_lock);
115 ret = iwl_sta_ucode_activate(priv, sta_id);
116 spin_unlock_bh(&priv->sta_lock);
117 } else {
118 ret = -EIO;
119 }
120
121 iwl_free_resp(&cmd);
122
123 return ret;
124}
125
126bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
127 struct iwl_rxon_context *ctx,
128 struct ieee80211_sta *sta)
129{
130 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
131 return false;
132
133#ifdef CONFIG_IWLWIFI_DEBUGFS
134 if (priv->disable_ht40)
135 return false;
136#endif
137
138 /* special case for RXON */
139 if (!sta)
140 return true;
141
142 return sta->deflink.bandwidth >= IEEE80211_STA_RX_BW_40;
143}
144
145static void iwl_sta_calc_ht_flags(struct iwl_priv *priv,
146 struct ieee80211_sta *sta,
147 struct iwl_rxon_context *ctx,
148 __le32 *flags, __le32 *mask)
149{
150 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->deflink.ht_cap;
151
152 *mask = STA_FLG_RTS_MIMO_PROT_MSK |
153 STA_FLG_MIMO_DIS_MSK |
154 STA_FLG_HT40_EN_MSK |
155 STA_FLG_MAX_AGG_SIZE_MSK |
156 STA_FLG_AGG_MPDU_DENSITY_MSK;
157 *flags = 0;
158
159 if (!sta || !sta_ht_inf->ht_supported)
160 return;
161
162 IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n",
163 sta->addr,
164 (sta->deflink.smps_mode == IEEE80211_SMPS_STATIC) ?
165 "static" :
166 (sta->deflink.smps_mode == IEEE80211_SMPS_DYNAMIC) ?
167 "dynamic" : "disabled");
168
169 switch (sta->deflink.smps_mode) {
170 case IEEE80211_SMPS_STATIC:
171 *flags |= STA_FLG_MIMO_DIS_MSK;
172 break;
173 case IEEE80211_SMPS_DYNAMIC:
174 *flags |= STA_FLG_RTS_MIMO_PROT_MSK;
175 break;
176 case IEEE80211_SMPS_OFF:
177 break;
178 default:
179 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", sta->deflink.smps_mode);
180 break;
181 }
182
183 *flags |= cpu_to_le32(
184 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
185
186 *flags |= cpu_to_le32(
187 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
188
189 if (iwl_is_ht40_tx_allowed(priv, ctx, sta))
190 *flags |= STA_FLG_HT40_EN_MSK;
191}
192
193int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
194 struct ieee80211_sta *sta)
195{
196 u8 sta_id = iwl_sta_id(sta);
197 __le32 flags, mask;
198 struct iwl_addsta_cmd cmd;
199
200 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
201 return -EINVAL;
202
203 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
204
205 spin_lock_bh(&priv->sta_lock);
206 priv->stations[sta_id].sta.station_flags &= ~mask;
207 priv->stations[sta_id].sta.station_flags |= flags;
208 spin_unlock_bh(&priv->sta_lock);
209
210 memset(&cmd, 0, sizeof(cmd));
211 cmd.mode = STA_CONTROL_MODIFY_MSK;
212 cmd.station_flags_msk = mask;
213 cmd.station_flags = flags;
214 cmd.sta.sta_id = sta_id;
215
216 return iwl_send_add_sta(priv, &cmd, 0);
217}
218
219static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
220 struct ieee80211_sta *sta,
221 struct iwl_rxon_context *ctx)
222{
223 __le32 flags, mask;
224
225 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
226
227 lockdep_assert_held(&priv->sta_lock);
228 priv->stations[index].sta.station_flags &= ~mask;
229 priv->stations[index].sta.station_flags |= flags;
230}
231
232/*
233 * iwl_prep_station - Prepare station information for addition
234 *
235 * should be called with sta_lock held
236 */
237u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
238 const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
239{
240 struct iwl_station_entry *station;
241 int i;
242 u8 sta_id = IWL_INVALID_STATION;
243
244 if (is_ap)
245 sta_id = ctx->ap_sta_id;
246 else if (is_broadcast_ether_addr(addr))
247 sta_id = ctx->bcast_sta_id;
248 else
249 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
250 if (ether_addr_equal(priv->stations[i].sta.sta.addr,
251 addr)) {
252 sta_id = i;
253 break;
254 }
255
256 if (!priv->stations[i].used &&
257 sta_id == IWL_INVALID_STATION)
258 sta_id = i;
259 }
260
261 /*
262 * These two conditions have the same outcome, but keep them
263 * separate
264 */
265 if (unlikely(sta_id == IWL_INVALID_STATION))
266 return sta_id;
267
268 /*
269 * uCode is not able to deal with multiple requests to add a
270 * station. Keep track if one is in progress so that we do not send
271 * another.
272 */
273 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
274 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
275 "added.\n", sta_id);
276 return sta_id;
277 }
278
279 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
280 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
281 ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) {
282 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
283 "adding again.\n", sta_id, addr);
284 return sta_id;
285 }
286
287 station = &priv->stations[sta_id];
288 station->used = IWL_STA_DRIVER_ACTIVE;
289 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
290 sta_id, addr);
291 priv->num_stations++;
292
293 /* Set up the REPLY_ADD_STA command to send to device */
294 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
295 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
296 station->sta.mode = 0;
297 station->sta.sta.sta_id = sta_id;
298 station->sta.station_flags = ctx->station_flags;
299 station->ctxid = ctx->ctxid;
300
301 if (sta) {
302 struct iwl_station_priv *sta_priv;
303
304 sta_priv = (void *)sta->drv_priv;
305 sta_priv->ctx = ctx;
306 }
307
308 /*
309 * OK to call unconditionally, since local stations (IBSS BSSID
310 * STA and broadcast STA) pass in a NULL sta, and mac80211
311 * doesn't allow HT IBSS.
312 */
313 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
314
315 return sta_id;
316
317}
318
319#define STA_WAIT_TIMEOUT (HZ/2)
320
321/*
322 * iwl_add_station_common -
323 */
324int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
325 const u8 *addr, bool is_ap,
326 struct ieee80211_sta *sta, u8 *sta_id_r)
327{
328 int ret = 0;
329 u8 sta_id;
330 struct iwl_addsta_cmd sta_cmd;
331
332 *sta_id_r = 0;
333 spin_lock_bh(&priv->sta_lock);
334 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
335 if (sta_id == IWL_INVALID_STATION) {
336 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
337 addr);
338 spin_unlock_bh(&priv->sta_lock);
339 return -EINVAL;
340 }
341
342 /*
343 * uCode is not able to deal with multiple requests to add a
344 * station. Keep track if one is in progress so that we do not send
345 * another.
346 */
347 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
348 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
349 "added.\n", sta_id);
350 spin_unlock_bh(&priv->sta_lock);
351 return -EEXIST;
352 }
353
354 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
355 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
356 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
357 "adding again.\n", sta_id, addr);
358 spin_unlock_bh(&priv->sta_lock);
359 return -EEXIST;
360 }
361
362 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
363 memcpy(&sta_cmd, &priv->stations[sta_id].sta,
364 sizeof(struct iwl_addsta_cmd));
365 spin_unlock_bh(&priv->sta_lock);
366
367 /* Add station to device's station table */
368 ret = iwl_send_add_sta(priv, &sta_cmd, 0);
369 if (ret) {
370 spin_lock_bh(&priv->sta_lock);
371 IWL_ERR(priv, "Adding station %pM failed.\n",
372 priv->stations[sta_id].sta.sta.addr);
373 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
374 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
375 spin_unlock_bh(&priv->sta_lock);
376 }
377 *sta_id_r = sta_id;
378 return ret;
379}
380
381/*
382 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
383 */
384static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
385{
386 lockdep_assert_held(&priv->sta_lock);
387
388 /* Ucode must be active and driver must be non active */
389 if ((priv->stations[sta_id].used &
390 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
391 IWL_STA_UCODE_ACTIVE)
392 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
393
394 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
395
396 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
397 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
398}
399
400static int iwl_send_remove_station(struct iwl_priv *priv,
401 const u8 *addr, int sta_id,
402 bool temporary)
403{
404 struct iwl_rx_packet *pkt;
405 int ret;
406 struct iwl_rem_sta_cmd rm_sta_cmd;
407 struct iwl_rem_sta_resp *rem_sta_resp;
408
409 struct iwl_host_cmd cmd = {
410 .id = REPLY_REMOVE_STA,
411 .len = { sizeof(struct iwl_rem_sta_cmd), },
412 .data = { &rm_sta_cmd, },
413 };
414
415 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
416 rm_sta_cmd.num_sta = 1;
417 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
418
419 cmd.flags |= CMD_WANT_SKB;
420
421 ret = iwl_dvm_send_cmd(priv, &cmd);
422
423 if (ret)
424 return ret;
425
426 pkt = cmd.resp_pkt;
427 rem_sta_resp = (void *)pkt->data;
428
429 switch (rem_sta_resp->status) {
430 case REM_STA_SUCCESS_MSK:
431 if (!temporary) {
432 spin_lock_bh(&priv->sta_lock);
433 iwl_sta_ucode_deactivate(priv, sta_id);
434 spin_unlock_bh(&priv->sta_lock);
435 }
436 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
437 break;
438 default:
439 ret = -EIO;
440 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
441 break;
442 }
443
444 iwl_free_resp(&cmd);
445
446 return ret;
447}
448
449/*
450 * iwl_remove_station - Remove driver's knowledge of station.
451 */
452int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
453 const u8 *addr)
454{
455 u8 tid;
456
457 if (!iwl_is_ready(priv)) {
458 IWL_DEBUG_INFO(priv,
459 "Unable to remove station %pM, device not ready.\n",
460 addr);
461 /*
462 * It is typical for stations to be removed when we are
463 * going down. Return success since device will be down
464 * soon anyway
465 */
466 return 0;
467 }
468
469 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
470 sta_id, addr);
471
472 if (WARN_ON(sta_id == IWL_INVALID_STATION))
473 return -EINVAL;
474
475 spin_lock_bh(&priv->sta_lock);
476
477 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
478 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
479 addr);
480 goto out_err;
481 }
482
483 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
484 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
485 addr);
486 goto out_err;
487 }
488
489 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
490 kfree(priv->stations[sta_id].lq);
491 priv->stations[sta_id].lq = NULL;
492 }
493
494 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
495 memset(&priv->tid_data[sta_id][tid], 0,
496 sizeof(priv->tid_data[sta_id][tid]));
497
498 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
499
500 priv->num_stations--;
501
502 if (WARN_ON(priv->num_stations < 0))
503 priv->num_stations = 0;
504
505 spin_unlock_bh(&priv->sta_lock);
506
507 return iwl_send_remove_station(priv, addr, sta_id, false);
508out_err:
509 spin_unlock_bh(&priv->sta_lock);
510 return -EINVAL;
511}
512
513void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
514 const u8 *addr)
515{
516 u8 tid;
517
518 if (!iwl_is_ready(priv)) {
519 IWL_DEBUG_INFO(priv,
520 "Unable to remove station %pM, device not ready.\n",
521 addr);
522 return;
523 }
524
525 IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id);
526
527 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
528 return;
529
530 spin_lock_bh(&priv->sta_lock);
531
532 WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE));
533
534 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
535 memset(&priv->tid_data[sta_id][tid], 0,
536 sizeof(priv->tid_data[sta_id][tid]));
537
538 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
539 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
540
541 priv->num_stations--;
542
543 if (WARN_ON_ONCE(priv->num_stations < 0))
544 priv->num_stations = 0;
545
546 spin_unlock_bh(&priv->sta_lock);
547}
548
549static void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
550 u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
551{
552 int i, r;
553 u32 rate_flags = 0;
554 __le32 rate_n_flags;
555
556 lockdep_assert_held(&priv->mutex);
557
558 memset(link_cmd, 0, sizeof(*link_cmd));
559
560 /* Set up the rate scaling to start at selected rate, fall back
561 * all the way down to 1M in IEEE order, and then spin on 1M */
562 if (priv->band == NL80211_BAND_5GHZ)
563 r = IWL_RATE_6M_INDEX;
564 else if (ctx && ctx->vif && ctx->vif->p2p)
565 r = IWL_RATE_6M_INDEX;
566 else
567 r = IWL_RATE_1M_INDEX;
568
569 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
570 rate_flags |= RATE_MCS_CCK_MSK;
571
572 rate_flags |= first_antenna(priv->nvm_data->valid_tx_ant) <<
573 RATE_MCS_ANT_POS;
574 rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
575 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
576 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
577
578 link_cmd->general_params.single_stream_ant_msk =
579 first_antenna(priv->nvm_data->valid_tx_ant);
580
581 link_cmd->general_params.dual_stream_ant_msk =
582 priv->nvm_data->valid_tx_ant &
583 ~first_antenna(priv->nvm_data->valid_tx_ant);
584 if (!link_cmd->general_params.dual_stream_ant_msk) {
585 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
586 } else if (num_of_ant(priv->nvm_data->valid_tx_ant) == 2) {
587 link_cmd->general_params.dual_stream_ant_msk =
588 priv->nvm_data->valid_tx_ant;
589 }
590
591 link_cmd->agg_params.agg_dis_start_th =
592 LINK_QUAL_AGG_DISABLE_START_DEF;
593 link_cmd->agg_params.agg_time_limit =
594 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
595
596 link_cmd->sta_id = sta_id;
597}
598
599/*
600 * iwl_clear_ucode_stations - clear ucode station table bits
601 *
602 * This function clears all the bits in the driver indicating
603 * which stations are active in the ucode. Call when something
604 * other than explicit station management would cause this in
605 * the ucode, e.g. unassociated RXON.
606 */
607void iwl_clear_ucode_stations(struct iwl_priv *priv,
608 struct iwl_rxon_context *ctx)
609{
610 int i;
611 bool cleared = false;
612
613 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
614
615 spin_lock_bh(&priv->sta_lock);
616 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
617 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
618 continue;
619
620 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
621 IWL_DEBUG_INFO(priv,
622 "Clearing ucode active for station %d\n", i);
623 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
624 cleared = true;
625 }
626 }
627 spin_unlock_bh(&priv->sta_lock);
628
629 if (!cleared)
630 IWL_DEBUG_INFO(priv,
631 "No active stations found to be cleared\n");
632}
633
634/*
635 * iwl_restore_stations() - Restore driver known stations to device
636 *
637 * All stations considered active by driver, but not present in ucode, is
638 * restored.
639 *
640 * Function sleeps.
641 */
642void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
643{
644 struct iwl_addsta_cmd sta_cmd;
645 static const struct iwl_link_quality_cmd zero_lq = {};
646 struct iwl_link_quality_cmd lq;
647 int i;
648 bool found = false;
649 int ret;
650 bool send_lq;
651
652 if (!iwl_is_ready(priv)) {
653 IWL_DEBUG_INFO(priv,
654 "Not ready yet, not restoring any stations.\n");
655 return;
656 }
657
658 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
659 spin_lock_bh(&priv->sta_lock);
660 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
661 if (ctx->ctxid != priv->stations[i].ctxid)
662 continue;
663 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
664 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
665 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
666 priv->stations[i].sta.sta.addr);
667 priv->stations[i].sta.mode = 0;
668 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
669 found = true;
670 }
671 }
672
673 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
674 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
675 memcpy(&sta_cmd, &priv->stations[i].sta,
676 sizeof(struct iwl_addsta_cmd));
677 send_lq = false;
678 if (priv->stations[i].lq) {
679 if (priv->wowlan)
680 iwl_sta_fill_lq(priv, ctx, i, &lq);
681 else
682 memcpy(&lq, priv->stations[i].lq,
683 sizeof(struct iwl_link_quality_cmd));
684
685 if (memcmp(&lq, &zero_lq, sizeof(lq)))
686 send_lq = true;
687 }
688 spin_unlock_bh(&priv->sta_lock);
689 ret = iwl_send_add_sta(priv, &sta_cmd, 0);
690 if (ret) {
691 spin_lock_bh(&priv->sta_lock);
692 IWL_ERR(priv, "Adding station %pM failed.\n",
693 priv->stations[i].sta.sta.addr);
694 priv->stations[i].used &=
695 ~IWL_STA_DRIVER_ACTIVE;
696 priv->stations[i].used &=
697 ~IWL_STA_UCODE_INPROGRESS;
698 continue;
699 }
700 /*
701 * Rate scaling has already been initialized, send
702 * current LQ command
703 */
704 if (send_lq)
705 iwl_send_lq_cmd(priv, ctx, &lq, 0, true);
706 spin_lock_bh(&priv->sta_lock);
707 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
708 }
709 }
710
711 spin_unlock_bh(&priv->sta_lock);
712 if (!found)
713 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
714 "no stations to be restored.\n");
715 else
716 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
717 "complete.\n");
718}
719
720int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
721{
722 int i;
723
724 for (i = 0; i < priv->sta_key_max_num; i++)
725 if (!test_and_set_bit(i, &priv->ucode_key_table))
726 return i;
727
728 return WEP_INVALID_OFFSET;
729}
730
731void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
732{
733 int i;
734
735 spin_lock_bh(&priv->sta_lock);
736 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
737 if (!(priv->stations[i].used & IWL_STA_BCAST))
738 continue;
739
740 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
741 priv->num_stations--;
742 if (WARN_ON(priv->num_stations < 0))
743 priv->num_stations = 0;
744 kfree(priv->stations[i].lq);
745 priv->stations[i].lq = NULL;
746 }
747 spin_unlock_bh(&priv->sta_lock);
748}
749
750#ifdef CONFIG_IWLWIFI_DEBUG
751static void iwl_dump_lq_cmd(struct iwl_priv *priv,
752 struct iwl_link_quality_cmd *lq)
753{
754 int i;
755 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
756 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
757 lq->general_params.single_stream_ant_msk,
758 lq->general_params.dual_stream_ant_msk);
759
760 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
761 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
762 i, lq->rs_table[i].rate_n_flags);
763}
764#else
765static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
766 struct iwl_link_quality_cmd *lq)
767{
768}
769#endif
770
771/*
772 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
773 *
774 * It sometimes happens when a HT rate has been in use and we
775 * loose connectivity with AP then mac80211 will first tell us that the
776 * current channel is not HT anymore before removing the station. In such a
777 * scenario the RXON flags will be updated to indicate we are not
778 * communicating HT anymore, but the LQ command may still contain HT rates.
779 * Test for this to prevent driver from sending LQ command between the time
780 * RXON flags are updated and when LQ command is updated.
781 */
782static bool is_lq_table_valid(struct iwl_priv *priv,
783 struct iwl_rxon_context *ctx,
784 struct iwl_link_quality_cmd *lq)
785{
786 int i;
787
788 if (ctx->ht.enabled)
789 return true;
790
791 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
792 ctx->active.channel);
793 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
794 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
795 RATE_MCS_HT_MSK) {
796 IWL_DEBUG_INFO(priv,
797 "index %d of LQ expects HT channel\n",
798 i);
799 return false;
800 }
801 }
802 return true;
803}
804
805/*
806 * iwl_send_lq_cmd() - Send link quality command
807 * @init: This command is sent as part of station initialization right
808 * after station has been added.
809 *
810 * The link quality command is sent as the last step of station creation.
811 * This is the special case in which init is set and we call a callback in
812 * this case to clear the state indicating that station creation is in
813 * progress.
814 */
815int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
816 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
817{
818 int ret = 0;
819 struct iwl_host_cmd cmd = {
820 .id = REPLY_TX_LINK_QUALITY_CMD,
821 .len = { sizeof(struct iwl_link_quality_cmd), },
822 .flags = flags,
823 .data = { lq, },
824 };
825
826 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
827 return -EINVAL;
828
829
830 spin_lock_bh(&priv->sta_lock);
831 if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
832 spin_unlock_bh(&priv->sta_lock);
833 return -EINVAL;
834 }
835 spin_unlock_bh(&priv->sta_lock);
836
837 iwl_dump_lq_cmd(priv, lq);
838 if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
839 return -EINVAL;
840
841 if (is_lq_table_valid(priv, ctx, lq))
842 ret = iwl_dvm_send_cmd(priv, &cmd);
843 else
844 ret = -EINVAL;
845
846 if (cmd.flags & CMD_ASYNC)
847 return ret;
848
849 if (init) {
850 IWL_DEBUG_INFO(priv, "init LQ command complete, "
851 "clearing sta addition status for sta %d\n",
852 lq->sta_id);
853 spin_lock_bh(&priv->sta_lock);
854 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
855 spin_unlock_bh(&priv->sta_lock);
856 }
857 return ret;
858}
859
860
861static struct iwl_link_quality_cmd *
862iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
863 u8 sta_id)
864{
865 struct iwl_link_quality_cmd *link_cmd;
866
867 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
868 if (!link_cmd) {
869 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
870 return NULL;
871 }
872
873 iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
874
875 return link_cmd;
876}
877
878/*
879 * iwlagn_add_bssid_station - Add the special IBSS BSSID station
880 *
881 * Function sleeps.
882 */
883int iwlagn_add_bssid_station(struct iwl_priv *priv,
884 struct iwl_rxon_context *ctx,
885 const u8 *addr, u8 *sta_id_r)
886{
887 int ret;
888 u8 sta_id;
889 struct iwl_link_quality_cmd *link_cmd;
890
891 if (sta_id_r)
892 *sta_id_r = IWL_INVALID_STATION;
893
894 ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
895 if (ret) {
896 IWL_ERR(priv, "Unable to add station %pM\n", addr);
897 return ret;
898 }
899
900 if (sta_id_r)
901 *sta_id_r = sta_id;
902
903 spin_lock_bh(&priv->sta_lock);
904 priv->stations[sta_id].used |= IWL_STA_LOCAL;
905 spin_unlock_bh(&priv->sta_lock);
906
907 /* Set up default rate scaling table in device's station table */
908 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
909 if (!link_cmd) {
910 IWL_ERR(priv,
911 "Unable to initialize rate scaling for station %pM.\n",
912 addr);
913 return -ENOMEM;
914 }
915
916 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, 0, true);
917 if (ret)
918 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
919
920 spin_lock_bh(&priv->sta_lock);
921 priv->stations[sta_id].lq = link_cmd;
922 spin_unlock_bh(&priv->sta_lock);
923
924 return 0;
925}
926
927/*
928 * static WEP keys
929 *
930 * For each context, the device has a table of 4 static WEP keys
931 * (one for each key index) that is updated with the following
932 * commands.
933 */
934
935static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
936 struct iwl_rxon_context *ctx,
937 bool send_if_empty)
938{
939 int i, not_empty = 0;
940 u8 buff[sizeof(struct iwl_wep_cmd) +
941 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
942 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
943 size_t cmd_size = sizeof(struct iwl_wep_cmd);
944 struct iwl_host_cmd cmd = {
945 .id = ctx->wep_key_cmd,
946 .data = { wep_cmd, },
947 };
948
949 might_sleep();
950
951 memset(wep_cmd, 0, cmd_size +
952 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
953
954 for (i = 0; i < WEP_KEYS_MAX ; i++) {
955 wep_cmd->key[i].key_index = i;
956 if (ctx->wep_keys[i].key_size) {
957 wep_cmd->key[i].key_offset = i;
958 not_empty = 1;
959 } else {
960 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
961 }
962
963 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
964 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
965 ctx->wep_keys[i].key_size);
966 }
967
968 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
969 wep_cmd->num_keys = WEP_KEYS_MAX;
970
971 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
972
973 cmd.len[0] = cmd_size;
974
975 if (not_empty || send_if_empty)
976 return iwl_dvm_send_cmd(priv, &cmd);
977 else
978 return 0;
979}
980
981int iwl_restore_default_wep_keys(struct iwl_priv *priv,
982 struct iwl_rxon_context *ctx)
983{
984 lockdep_assert_held(&priv->mutex);
985
986 return iwl_send_static_wepkey_cmd(priv, ctx, false);
987}
988
989int iwl_remove_default_wep_key(struct iwl_priv *priv,
990 struct iwl_rxon_context *ctx,
991 struct ieee80211_key_conf *keyconf)
992{
993 int ret;
994
995 lockdep_assert_held(&priv->mutex);
996
997 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
998 keyconf->keyidx);
999
1000 memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1001 if (iwl_is_rfkill(priv)) {
1002 IWL_DEBUG_WEP(priv,
1003 "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1004 /* but keys in device are clear anyway so return success */
1005 return 0;
1006 }
1007 ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1008 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1009 keyconf->keyidx, ret);
1010
1011 return ret;
1012}
1013
1014int iwl_set_default_wep_key(struct iwl_priv *priv,
1015 struct iwl_rxon_context *ctx,
1016 struct ieee80211_key_conf *keyconf)
1017{
1018 int ret;
1019
1020 lockdep_assert_held(&priv->mutex);
1021
1022 if (keyconf->keylen != WEP_KEY_LEN_128 &&
1023 keyconf->keylen != WEP_KEY_LEN_64) {
1024 IWL_DEBUG_WEP(priv,
1025 "Bad WEP key length %d\n", keyconf->keylen);
1026 return -EINVAL;
1027 }
1028
1029 keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1030
1031 ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1032 memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1033 keyconf->keylen);
1034
1035 ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1036 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1037 keyconf->keylen, keyconf->keyidx, ret);
1038
1039 return ret;
1040}
1041
1042/*
1043 * dynamic (per-station) keys
1044 *
1045 * The dynamic keys are a little more complicated. The device has
1046 * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1047 * These are linked to stations by a table that contains an index
1048 * into the key table for each station/key index/{mcast,unicast},
1049 * i.e. it's basically an array of pointers like this:
1050 * key_offset_t key_mapping[NUM_STATIONS][4][2];
1051 * (it really works differently, but you can think of it as such)
1052 *
1053 * The key uploading and linking happens in the same command, the
1054 * add station command with STA_MODIFY_KEY_MASK.
1055 */
1056
1057static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1058 struct ieee80211_vif *vif,
1059 struct ieee80211_sta *sta)
1060{
1061 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1062
1063 if (sta)
1064 return iwl_sta_id(sta);
1065
1066 /*
1067 * The device expects GTKs for station interfaces to be
1068 * installed as GTKs for the AP station. If we have no
1069 * station ID, then use the ap_sta_id in that case.
1070 */
1071 if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
1072 return vif_priv->ctx->ap_sta_id;
1073
1074 return IWL_INVALID_STATION;
1075}
1076
1077static int iwlagn_send_sta_key(struct iwl_priv *priv,
1078 struct ieee80211_key_conf *keyconf,
1079 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1080 u32 cmd_flags)
1081{
1082 __le16 key_flags;
1083 struct iwl_addsta_cmd sta_cmd;
1084 size_t to_copy;
1085 int i;
1086
1087 spin_lock_bh(&priv->sta_lock);
1088 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1089 spin_unlock_bh(&priv->sta_lock);
1090
1091 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1092 key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1093
1094 switch (keyconf->cipher) {
1095 case WLAN_CIPHER_SUITE_CCMP:
1096 key_flags |= STA_KEY_FLG_CCMP;
1097 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1098 break;
1099 case WLAN_CIPHER_SUITE_TKIP:
1100 key_flags |= STA_KEY_FLG_TKIP;
1101 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1102 for (i = 0; i < 5; i++)
1103 sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1104 /* keyconf may contain MIC rx/tx keys which iwl does not use */
1105 to_copy = min_t(size_t, sizeof(sta_cmd.key.key), keyconf->keylen);
1106 memcpy(sta_cmd.key.key, keyconf->key, to_copy);
1107 break;
1108 case WLAN_CIPHER_SUITE_WEP104:
1109 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1110 fallthrough;
1111 case WLAN_CIPHER_SUITE_WEP40:
1112 key_flags |= STA_KEY_FLG_WEP;
1113 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1114 break;
1115 default:
1116 WARN_ON(1);
1117 return -EINVAL;
1118 }
1119
1120 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1121 key_flags |= STA_KEY_MULTICAST_MSK;
1122
1123 /* key pointer (offset) */
1124 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1125
1126 sta_cmd.key.key_flags = key_flags;
1127 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1128 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1129
1130 return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1131}
1132
1133void iwl_update_tkip_key(struct iwl_priv *priv,
1134 struct ieee80211_vif *vif,
1135 struct ieee80211_key_conf *keyconf,
1136 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1137{
1138 u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1139
1140 if (sta_id == IWL_INVALID_STATION)
1141 return;
1142
1143 if (iwl_scan_cancel(priv)) {
1144 /* cancel scan failed, just live w/ bad key and rely
1145 briefly on SW decryption */
1146 return;
1147 }
1148
1149 iwlagn_send_sta_key(priv, keyconf, sta_id,
1150 iv32, phase1key, CMD_ASYNC);
1151}
1152
1153int iwl_remove_dynamic_key(struct iwl_priv *priv,
1154 struct iwl_rxon_context *ctx,
1155 struct ieee80211_key_conf *keyconf,
1156 struct ieee80211_sta *sta)
1157{
1158 struct iwl_addsta_cmd sta_cmd;
1159 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1160 __le16 key_flags;
1161
1162 /* if station isn't there, neither is the key */
1163 if (sta_id == IWL_INVALID_STATION)
1164 return -ENOENT;
1165
1166 spin_lock_bh(&priv->sta_lock);
1167 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1168 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1169 sta_id = IWL_INVALID_STATION;
1170 spin_unlock_bh(&priv->sta_lock);
1171
1172 if (sta_id == IWL_INVALID_STATION)
1173 return 0;
1174
1175 lockdep_assert_held(&priv->mutex);
1176
1177 ctx->key_mapping_keys--;
1178
1179 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1180 keyconf->keyidx, sta_id);
1181
1182 if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1183 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1184 keyconf->hw_key_idx);
1185
1186 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1187 key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
1188 STA_KEY_FLG_INVALID;
1189
1190 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1191 key_flags |= STA_KEY_MULTICAST_MSK;
1192
1193 sta_cmd.key.key_flags = key_flags;
1194 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1195 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1196 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1197
1198 return iwl_send_add_sta(priv, &sta_cmd, 0);
1199}
1200
1201int iwl_set_dynamic_key(struct iwl_priv *priv,
1202 struct iwl_rxon_context *ctx,
1203 struct ieee80211_key_conf *keyconf,
1204 struct ieee80211_sta *sta)
1205{
1206 struct ieee80211_key_seq seq;
1207 u16 p1k[5];
1208 int ret;
1209 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1210 const u8 *addr;
1211
1212 if (sta_id == IWL_INVALID_STATION)
1213 return -EINVAL;
1214
1215 lockdep_assert_held(&priv->mutex);
1216
1217 keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1218 if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1219 return -ENOSPC;
1220
1221 ctx->key_mapping_keys++;
1222
1223 switch (keyconf->cipher) {
1224 case WLAN_CIPHER_SUITE_TKIP:
1225 if (sta)
1226 addr = sta->addr;
1227 else /* station mode case only */
1228 addr = ctx->active.bssid_addr;
1229
1230 /* pre-fill phase 1 key into device cache */
1231 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1232 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1233 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1234 seq.tkip.iv32, p1k, 0);
1235 break;
1236 case WLAN_CIPHER_SUITE_CCMP:
1237 case WLAN_CIPHER_SUITE_WEP40:
1238 case WLAN_CIPHER_SUITE_WEP104:
1239 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1240 0, NULL, 0);
1241 break;
1242 default:
1243 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1244 ret = -EINVAL;
1245 }
1246
1247 if (ret) {
1248 ctx->key_mapping_keys--;
1249 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1250 }
1251
1252 IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1253 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1254 sta ? sta->addr : NULL, ret);
1255
1256 return ret;
1257}
1258
1259/*
1260 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1261 *
1262 * This adds the broadcast station into the driver's station table
1263 * and marks it driver active, so that it will be restored to the
1264 * device at the next best time.
1265 */
1266int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1267 struct iwl_rxon_context *ctx)
1268{
1269 struct iwl_link_quality_cmd *link_cmd;
1270 u8 sta_id;
1271
1272 spin_lock_bh(&priv->sta_lock);
1273 sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1274 if (sta_id == IWL_INVALID_STATION) {
1275 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1276 spin_unlock_bh(&priv->sta_lock);
1277
1278 return -EINVAL;
1279 }
1280
1281 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1282 priv->stations[sta_id].used |= IWL_STA_BCAST;
1283 spin_unlock_bh(&priv->sta_lock);
1284
1285 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1286 if (!link_cmd) {
1287 IWL_ERR(priv,
1288 "Unable to initialize rate scaling for bcast station.\n");
1289 return -ENOMEM;
1290 }
1291
1292 spin_lock_bh(&priv->sta_lock);
1293 priv->stations[sta_id].lq = link_cmd;
1294 spin_unlock_bh(&priv->sta_lock);
1295
1296 return 0;
1297}
1298
1299/*
1300 * iwl_update_bcast_station - update broadcast station's LQ command
1301 *
1302 * Only used by iwlagn. Placed here to have all bcast station management
1303 * code together.
1304 */
1305int iwl_update_bcast_station(struct iwl_priv *priv,
1306 struct iwl_rxon_context *ctx)
1307{
1308 struct iwl_link_quality_cmd *link_cmd;
1309 u8 sta_id = ctx->bcast_sta_id;
1310
1311 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1312 if (!link_cmd) {
1313 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1314 return -ENOMEM;
1315 }
1316
1317 spin_lock_bh(&priv->sta_lock);
1318 if (priv->stations[sta_id].lq)
1319 kfree(priv->stations[sta_id].lq);
1320 else
1321 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1322 priv->stations[sta_id].lq = link_cmd;
1323 spin_unlock_bh(&priv->sta_lock);
1324
1325 return 0;
1326}
1327
1328int iwl_update_bcast_stations(struct iwl_priv *priv)
1329{
1330 struct iwl_rxon_context *ctx;
1331 int ret = 0;
1332
1333 for_each_context(priv, ctx) {
1334 ret = iwl_update_bcast_station(priv, ctx);
1335 if (ret)
1336 break;
1337 }
1338
1339 return ret;
1340}
1341
1342/*
1343 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1344 */
1345int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1346{
1347 struct iwl_addsta_cmd sta_cmd;
1348
1349 lockdep_assert_held(&priv->mutex);
1350
1351 /* Remove "disable" flag, to enable Tx for this TID */
1352 spin_lock_bh(&priv->sta_lock);
1353 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1354 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1355 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1356 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1357 spin_unlock_bh(&priv->sta_lock);
1358
1359 return iwl_send_add_sta(priv, &sta_cmd, 0);
1360}
1361
1362int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1363 int tid, u16 ssn)
1364{
1365 int sta_id;
1366 struct iwl_addsta_cmd sta_cmd;
1367
1368 lockdep_assert_held(&priv->mutex);
1369
1370 sta_id = iwl_sta_id(sta);
1371 if (sta_id == IWL_INVALID_STATION)
1372 return -ENXIO;
1373
1374 spin_lock_bh(&priv->sta_lock);
1375 priv->stations[sta_id].sta.station_flags_msk = 0;
1376 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1377 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1378 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1379 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1380 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1381 spin_unlock_bh(&priv->sta_lock);
1382
1383 return iwl_send_add_sta(priv, &sta_cmd, 0);
1384}
1385
1386int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1387 int tid)
1388{
1389 int sta_id;
1390 struct iwl_addsta_cmd sta_cmd;
1391
1392 lockdep_assert_held(&priv->mutex);
1393
1394 sta_id = iwl_sta_id(sta);
1395 if (sta_id == IWL_INVALID_STATION) {
1396 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1397 return -ENXIO;
1398 }
1399
1400 spin_lock_bh(&priv->sta_lock);
1401 priv->stations[sta_id].sta.station_flags_msk = 0;
1402 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1403 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)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, 0);
1409}
1410
1411
1412
1413void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1414{
1415 struct iwl_addsta_cmd cmd = {
1416 .mode = STA_CONTROL_MODIFY_MSK,
1417 .station_flags = STA_FLG_PWR_SAVE_MSK,
1418 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1419 .sta.sta_id = sta_id,
1420 .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK,
1421 .sleep_tx_count = cpu_to_le16(cnt),
1422 };
1423
1424 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1425}
1// SPDX-License-Identifier: GPL-2.0-only
2/******************************************************************************
3 *
4 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
5 *
6 * Portions of this file are derived from the ipw3945 project, as well
7 * as portions of the ieee80211 subsystem header files.
8 *
9 * Contact Information:
10 * Intel Linux Wireless <linuxwifi@intel.com>
11 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
12 *
13 *****************************************************************************/
14#include <linux/etherdevice.h>
15#include <net/mac80211.h>
16#include "iwl-trans.h"
17#include "dev.h"
18#include "agn.h"
19
20const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
21
22static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
23{
24 lockdep_assert_held(&priv->sta_lock);
25
26 if (sta_id >= IWLAGN_STATION_COUNT) {
27 IWL_ERR(priv, "invalid sta_id %u\n", sta_id);
28 return -EINVAL;
29 }
30 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
31 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
32 "addr %pM\n",
33 sta_id, priv->stations[sta_id].sta.sta.addr);
34
35 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
36 IWL_DEBUG_ASSOC(priv,
37 "STA id %u addr %pM already present in uCode "
38 "(according to driver)\n",
39 sta_id, priv->stations[sta_id].sta.sta.addr);
40 } else {
41 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
42 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
43 sta_id, priv->stations[sta_id].sta.sta.addr);
44 }
45 return 0;
46}
47
48static void iwl_process_add_sta_resp(struct iwl_priv *priv,
49 struct iwl_rx_packet *pkt)
50{
51 struct iwl_add_sta_resp *add_sta_resp = (void *)pkt->data;
52
53 IWL_DEBUG_INFO(priv, "Processing response for adding station\n");
54
55 spin_lock_bh(&priv->sta_lock);
56
57 switch (add_sta_resp->status) {
58 case ADD_STA_SUCCESS_MSK:
59 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
60 break;
61 case ADD_STA_NO_ROOM_IN_TABLE:
62 IWL_ERR(priv, "Adding station failed, no room in table.\n");
63 break;
64 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
65 IWL_ERR(priv,
66 "Adding station failed, no block ack resource.\n");
67 break;
68 case ADD_STA_MODIFY_NON_EXIST_STA:
69 IWL_ERR(priv, "Attempting to modify non-existing station\n");
70 break;
71 default:
72 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
73 add_sta_resp->status);
74 break;
75 }
76
77 spin_unlock_bh(&priv->sta_lock);
78}
79
80void iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
81{
82 struct iwl_rx_packet *pkt = rxb_addr(rxb);
83
84 iwl_process_add_sta_resp(priv, pkt);
85}
86
87int iwl_send_add_sta(struct iwl_priv *priv,
88 struct iwl_addsta_cmd *sta, u8 flags)
89{
90 int ret = 0;
91 struct iwl_host_cmd cmd = {
92 .id = REPLY_ADD_STA,
93 .flags = flags,
94 .data = { sta, },
95 .len = { sizeof(*sta), },
96 };
97 u8 sta_id __maybe_unused = sta->sta.sta_id;
98 struct iwl_rx_packet *pkt;
99 struct iwl_add_sta_resp *add_sta_resp;
100
101 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
102 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
103
104 if (!(flags & CMD_ASYNC)) {
105 cmd.flags |= CMD_WANT_SKB;
106 might_sleep();
107 }
108
109 ret = iwl_dvm_send_cmd(priv, &cmd);
110
111 if (ret || (flags & CMD_ASYNC))
112 return ret;
113
114 pkt = cmd.resp_pkt;
115 add_sta_resp = (void *)pkt->data;
116
117 /* debug messages are printed in the handler */
118 if (add_sta_resp->status == ADD_STA_SUCCESS_MSK) {
119 spin_lock_bh(&priv->sta_lock);
120 ret = iwl_sta_ucode_activate(priv, sta_id);
121 spin_unlock_bh(&priv->sta_lock);
122 } else {
123 ret = -EIO;
124 }
125
126 iwl_free_resp(&cmd);
127
128 return ret;
129}
130
131bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
132 struct iwl_rxon_context *ctx,
133 struct ieee80211_sta *sta)
134{
135 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
136 return false;
137
138#ifdef CONFIG_IWLWIFI_DEBUGFS
139 if (priv->disable_ht40)
140 return false;
141#endif
142
143 /* special case for RXON */
144 if (!sta)
145 return true;
146
147 return sta->bandwidth >= IEEE80211_STA_RX_BW_40;
148}
149
150static void iwl_sta_calc_ht_flags(struct iwl_priv *priv,
151 struct ieee80211_sta *sta,
152 struct iwl_rxon_context *ctx,
153 __le32 *flags, __le32 *mask)
154{
155 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
156
157 *mask = STA_FLG_RTS_MIMO_PROT_MSK |
158 STA_FLG_MIMO_DIS_MSK |
159 STA_FLG_HT40_EN_MSK |
160 STA_FLG_MAX_AGG_SIZE_MSK |
161 STA_FLG_AGG_MPDU_DENSITY_MSK;
162 *flags = 0;
163
164 if (!sta || !sta_ht_inf->ht_supported)
165 return;
166
167 IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n",
168 sta->addr,
169 (sta->smps_mode == IEEE80211_SMPS_STATIC) ?
170 "static" :
171 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ?
172 "dynamic" : "disabled");
173
174 switch (sta->smps_mode) {
175 case IEEE80211_SMPS_STATIC:
176 *flags |= STA_FLG_MIMO_DIS_MSK;
177 break;
178 case IEEE80211_SMPS_DYNAMIC:
179 *flags |= STA_FLG_RTS_MIMO_PROT_MSK;
180 break;
181 case IEEE80211_SMPS_OFF:
182 break;
183 default:
184 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", sta->smps_mode);
185 break;
186 }
187
188 *flags |= cpu_to_le32(
189 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
190
191 *flags |= cpu_to_le32(
192 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
193
194 if (iwl_is_ht40_tx_allowed(priv, ctx, sta))
195 *flags |= STA_FLG_HT40_EN_MSK;
196}
197
198int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
199 struct ieee80211_sta *sta)
200{
201 u8 sta_id = iwl_sta_id(sta);
202 __le32 flags, mask;
203 struct iwl_addsta_cmd cmd;
204
205 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
206 return -EINVAL;
207
208 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
209
210 spin_lock_bh(&priv->sta_lock);
211 priv->stations[sta_id].sta.station_flags &= ~mask;
212 priv->stations[sta_id].sta.station_flags |= flags;
213 spin_unlock_bh(&priv->sta_lock);
214
215 memset(&cmd, 0, sizeof(cmd));
216 cmd.mode = STA_CONTROL_MODIFY_MSK;
217 cmd.station_flags_msk = mask;
218 cmd.station_flags = flags;
219 cmd.sta.sta_id = sta_id;
220
221 return iwl_send_add_sta(priv, &cmd, 0);
222}
223
224static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
225 struct ieee80211_sta *sta,
226 struct iwl_rxon_context *ctx)
227{
228 __le32 flags, mask;
229
230 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
231
232 lockdep_assert_held(&priv->sta_lock);
233 priv->stations[index].sta.station_flags &= ~mask;
234 priv->stations[index].sta.station_flags |= flags;
235}
236
237/**
238 * iwl_prep_station - Prepare station information for addition
239 *
240 * should be called with sta_lock held
241 */
242u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
243 const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
244{
245 struct iwl_station_entry *station;
246 int i;
247 u8 sta_id = IWL_INVALID_STATION;
248
249 if (is_ap)
250 sta_id = ctx->ap_sta_id;
251 else if (is_broadcast_ether_addr(addr))
252 sta_id = ctx->bcast_sta_id;
253 else
254 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
255 if (ether_addr_equal(priv->stations[i].sta.sta.addr,
256 addr)) {
257 sta_id = i;
258 break;
259 }
260
261 if (!priv->stations[i].used &&
262 sta_id == IWL_INVALID_STATION)
263 sta_id = i;
264 }
265
266 /*
267 * These two conditions have the same outcome, but keep them
268 * separate
269 */
270 if (unlikely(sta_id == IWL_INVALID_STATION))
271 return sta_id;
272
273 /*
274 * uCode is not able to deal with multiple requests to add a
275 * station. Keep track if one is in progress so that we do not send
276 * another.
277 */
278 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
279 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
280 "added.\n", sta_id);
281 return sta_id;
282 }
283
284 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
285 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
286 ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) {
287 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
288 "adding again.\n", sta_id, addr);
289 return sta_id;
290 }
291
292 station = &priv->stations[sta_id];
293 station->used = IWL_STA_DRIVER_ACTIVE;
294 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
295 sta_id, addr);
296 priv->num_stations++;
297
298 /* Set up the REPLY_ADD_STA command to send to device */
299 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
300 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
301 station->sta.mode = 0;
302 station->sta.sta.sta_id = sta_id;
303 station->sta.station_flags = ctx->station_flags;
304 station->ctxid = ctx->ctxid;
305
306 if (sta) {
307 struct iwl_station_priv *sta_priv;
308
309 sta_priv = (void *)sta->drv_priv;
310 sta_priv->ctx = ctx;
311 }
312
313 /*
314 * OK to call unconditionally, since local stations (IBSS BSSID
315 * STA and broadcast STA) pass in a NULL sta, and mac80211
316 * doesn't allow HT IBSS.
317 */
318 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
319
320 return sta_id;
321
322}
323
324#define STA_WAIT_TIMEOUT (HZ/2)
325
326/**
327 * iwl_add_station_common -
328 */
329int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
330 const u8 *addr, bool is_ap,
331 struct ieee80211_sta *sta, u8 *sta_id_r)
332{
333 int ret = 0;
334 u8 sta_id;
335 struct iwl_addsta_cmd sta_cmd;
336
337 *sta_id_r = 0;
338 spin_lock_bh(&priv->sta_lock);
339 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
340 if (sta_id == IWL_INVALID_STATION) {
341 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
342 addr);
343 spin_unlock_bh(&priv->sta_lock);
344 return -EINVAL;
345 }
346
347 /*
348 * uCode is not able to deal with multiple requests to add a
349 * station. Keep track if one is in progress so that we do not send
350 * another.
351 */
352 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
353 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
354 "added.\n", sta_id);
355 spin_unlock_bh(&priv->sta_lock);
356 return -EEXIST;
357 }
358
359 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
360 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
361 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
362 "adding again.\n", sta_id, addr);
363 spin_unlock_bh(&priv->sta_lock);
364 return -EEXIST;
365 }
366
367 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
368 memcpy(&sta_cmd, &priv->stations[sta_id].sta,
369 sizeof(struct iwl_addsta_cmd));
370 spin_unlock_bh(&priv->sta_lock);
371
372 /* Add station to device's station table */
373 ret = iwl_send_add_sta(priv, &sta_cmd, 0);
374 if (ret) {
375 spin_lock_bh(&priv->sta_lock);
376 IWL_ERR(priv, "Adding station %pM failed.\n",
377 priv->stations[sta_id].sta.sta.addr);
378 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
379 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
380 spin_unlock_bh(&priv->sta_lock);
381 }
382 *sta_id_r = sta_id;
383 return ret;
384}
385
386/**
387 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
388 */
389static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
390{
391 lockdep_assert_held(&priv->sta_lock);
392
393 /* Ucode must be active and driver must be non active */
394 if ((priv->stations[sta_id].used &
395 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
396 IWL_STA_UCODE_ACTIVE)
397 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
398
399 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
400
401 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
402 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
403}
404
405static int iwl_send_remove_station(struct iwl_priv *priv,
406 const u8 *addr, int sta_id,
407 bool temporary)
408{
409 struct iwl_rx_packet *pkt;
410 int ret;
411 struct iwl_rem_sta_cmd rm_sta_cmd;
412 struct iwl_rem_sta_resp *rem_sta_resp;
413
414 struct iwl_host_cmd cmd = {
415 .id = REPLY_REMOVE_STA,
416 .len = { sizeof(struct iwl_rem_sta_cmd), },
417 .data = { &rm_sta_cmd, },
418 };
419
420 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
421 rm_sta_cmd.num_sta = 1;
422 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
423
424 cmd.flags |= CMD_WANT_SKB;
425
426 ret = iwl_dvm_send_cmd(priv, &cmd);
427
428 if (ret)
429 return ret;
430
431 pkt = cmd.resp_pkt;
432 rem_sta_resp = (void *)pkt->data;
433
434 switch (rem_sta_resp->status) {
435 case REM_STA_SUCCESS_MSK:
436 if (!temporary) {
437 spin_lock_bh(&priv->sta_lock);
438 iwl_sta_ucode_deactivate(priv, sta_id);
439 spin_unlock_bh(&priv->sta_lock);
440 }
441 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
442 break;
443 default:
444 ret = -EIO;
445 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
446 break;
447 }
448
449 iwl_free_resp(&cmd);
450
451 return ret;
452}
453
454/**
455 * iwl_remove_station - Remove driver's knowledge of station.
456 */
457int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
458 const u8 *addr)
459{
460 u8 tid;
461
462 if (!iwl_is_ready(priv)) {
463 IWL_DEBUG_INFO(priv,
464 "Unable to remove station %pM, device not ready.\n",
465 addr);
466 /*
467 * It is typical for stations to be removed when we are
468 * going down. Return success since device will be down
469 * soon anyway
470 */
471 return 0;
472 }
473
474 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
475 sta_id, addr);
476
477 if (WARN_ON(sta_id == IWL_INVALID_STATION))
478 return -EINVAL;
479
480 spin_lock_bh(&priv->sta_lock);
481
482 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
483 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
484 addr);
485 goto out_err;
486 }
487
488 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
489 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
490 addr);
491 goto out_err;
492 }
493
494 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
495 kfree(priv->stations[sta_id].lq);
496 priv->stations[sta_id].lq = NULL;
497 }
498
499 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
500 memset(&priv->tid_data[sta_id][tid], 0,
501 sizeof(priv->tid_data[sta_id][tid]));
502
503 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
504
505 priv->num_stations--;
506
507 if (WARN_ON(priv->num_stations < 0))
508 priv->num_stations = 0;
509
510 spin_unlock_bh(&priv->sta_lock);
511
512 return iwl_send_remove_station(priv, addr, sta_id, false);
513out_err:
514 spin_unlock_bh(&priv->sta_lock);
515 return -EINVAL;
516}
517
518void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
519 const u8 *addr)
520{
521 u8 tid;
522
523 if (!iwl_is_ready(priv)) {
524 IWL_DEBUG_INFO(priv,
525 "Unable to remove station %pM, device not ready.\n",
526 addr);
527 return;
528 }
529
530 IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id);
531
532 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
533 return;
534
535 spin_lock_bh(&priv->sta_lock);
536
537 WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE));
538
539 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
540 memset(&priv->tid_data[sta_id][tid], 0,
541 sizeof(priv->tid_data[sta_id][tid]));
542
543 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
544 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
545
546 priv->num_stations--;
547
548 if (WARN_ON_ONCE(priv->num_stations < 0))
549 priv->num_stations = 0;
550
551 spin_unlock_bh(&priv->sta_lock);
552}
553
554static void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
555 u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
556{
557 int i, r;
558 u32 rate_flags = 0;
559 __le32 rate_n_flags;
560
561 lockdep_assert_held(&priv->mutex);
562
563 memset(link_cmd, 0, sizeof(*link_cmd));
564
565 /* Set up the rate scaling to start at selected rate, fall back
566 * all the way down to 1M in IEEE order, and then spin on 1M */
567 if (priv->band == NL80211_BAND_5GHZ)
568 r = IWL_RATE_6M_INDEX;
569 else if (ctx && ctx->vif && ctx->vif->p2p)
570 r = IWL_RATE_6M_INDEX;
571 else
572 r = IWL_RATE_1M_INDEX;
573
574 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
575 rate_flags |= RATE_MCS_CCK_MSK;
576
577 rate_flags |= first_antenna(priv->nvm_data->valid_tx_ant) <<
578 RATE_MCS_ANT_POS;
579 rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
580 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
581 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
582
583 link_cmd->general_params.single_stream_ant_msk =
584 first_antenna(priv->nvm_data->valid_tx_ant);
585
586 link_cmd->general_params.dual_stream_ant_msk =
587 priv->nvm_data->valid_tx_ant &
588 ~first_antenna(priv->nvm_data->valid_tx_ant);
589 if (!link_cmd->general_params.dual_stream_ant_msk) {
590 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
591 } else if (num_of_ant(priv->nvm_data->valid_tx_ant) == 2) {
592 link_cmd->general_params.dual_stream_ant_msk =
593 priv->nvm_data->valid_tx_ant;
594 }
595
596 link_cmd->agg_params.agg_dis_start_th =
597 LINK_QUAL_AGG_DISABLE_START_DEF;
598 link_cmd->agg_params.agg_time_limit =
599 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
600
601 link_cmd->sta_id = sta_id;
602}
603
604/**
605 * iwl_clear_ucode_stations - clear ucode station table bits
606 *
607 * This function clears all the bits in the driver indicating
608 * which stations are active in the ucode. Call when something
609 * other than explicit station management would cause this in
610 * the ucode, e.g. unassociated RXON.
611 */
612void iwl_clear_ucode_stations(struct iwl_priv *priv,
613 struct iwl_rxon_context *ctx)
614{
615 int i;
616 bool cleared = false;
617
618 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
619
620 spin_lock_bh(&priv->sta_lock);
621 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
622 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
623 continue;
624
625 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
626 IWL_DEBUG_INFO(priv,
627 "Clearing ucode active for station %d\n", i);
628 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
629 cleared = true;
630 }
631 }
632 spin_unlock_bh(&priv->sta_lock);
633
634 if (!cleared)
635 IWL_DEBUG_INFO(priv,
636 "No active stations found to be cleared\n");
637}
638
639/**
640 * iwl_restore_stations() - Restore driver known stations to device
641 *
642 * All stations considered active by driver, but not present in ucode, is
643 * restored.
644 *
645 * Function sleeps.
646 */
647void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
648{
649 struct iwl_addsta_cmd sta_cmd;
650 static const struct iwl_link_quality_cmd zero_lq = {};
651 struct iwl_link_quality_cmd lq;
652 int i;
653 bool found = false;
654 int ret;
655 bool send_lq;
656
657 if (!iwl_is_ready(priv)) {
658 IWL_DEBUG_INFO(priv,
659 "Not ready yet, not restoring any stations.\n");
660 return;
661 }
662
663 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
664 spin_lock_bh(&priv->sta_lock);
665 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
666 if (ctx->ctxid != priv->stations[i].ctxid)
667 continue;
668 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
669 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
670 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
671 priv->stations[i].sta.sta.addr);
672 priv->stations[i].sta.mode = 0;
673 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
674 found = true;
675 }
676 }
677
678 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
679 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
680 memcpy(&sta_cmd, &priv->stations[i].sta,
681 sizeof(struct iwl_addsta_cmd));
682 send_lq = false;
683 if (priv->stations[i].lq) {
684 if (priv->wowlan)
685 iwl_sta_fill_lq(priv, ctx, i, &lq);
686 else
687 memcpy(&lq, priv->stations[i].lq,
688 sizeof(struct iwl_link_quality_cmd));
689
690 if (memcmp(&lq, &zero_lq, sizeof(lq)))
691 send_lq = true;
692 }
693 spin_unlock_bh(&priv->sta_lock);
694 ret = iwl_send_add_sta(priv, &sta_cmd, 0);
695 if (ret) {
696 spin_lock_bh(&priv->sta_lock);
697 IWL_ERR(priv, "Adding station %pM failed.\n",
698 priv->stations[i].sta.sta.addr);
699 priv->stations[i].used &=
700 ~IWL_STA_DRIVER_ACTIVE;
701 priv->stations[i].used &=
702 ~IWL_STA_UCODE_INPROGRESS;
703 continue;
704 }
705 /*
706 * Rate scaling has already been initialized, send
707 * current LQ command
708 */
709 if (send_lq)
710 iwl_send_lq_cmd(priv, ctx, &lq, 0, true);
711 spin_lock_bh(&priv->sta_lock);
712 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
713 }
714 }
715
716 spin_unlock_bh(&priv->sta_lock);
717 if (!found)
718 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
719 "no stations to be restored.\n");
720 else
721 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
722 "complete.\n");
723}
724
725int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
726{
727 int i;
728
729 for (i = 0; i < priv->sta_key_max_num; i++)
730 if (!test_and_set_bit(i, &priv->ucode_key_table))
731 return i;
732
733 return WEP_INVALID_OFFSET;
734}
735
736void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
737{
738 int i;
739
740 spin_lock_bh(&priv->sta_lock);
741 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
742 if (!(priv->stations[i].used & IWL_STA_BCAST))
743 continue;
744
745 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
746 priv->num_stations--;
747 if (WARN_ON(priv->num_stations < 0))
748 priv->num_stations = 0;
749 kfree(priv->stations[i].lq);
750 priv->stations[i].lq = NULL;
751 }
752 spin_unlock_bh(&priv->sta_lock);
753}
754
755#ifdef CONFIG_IWLWIFI_DEBUG
756static void iwl_dump_lq_cmd(struct iwl_priv *priv,
757 struct iwl_link_quality_cmd *lq)
758{
759 int i;
760 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
761 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
762 lq->general_params.single_stream_ant_msk,
763 lq->general_params.dual_stream_ant_msk);
764
765 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
766 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
767 i, lq->rs_table[i].rate_n_flags);
768}
769#else
770static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
771 struct iwl_link_quality_cmd *lq)
772{
773}
774#endif
775
776/**
777 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
778 *
779 * It sometimes happens when a HT rate has been in use and we
780 * loose connectivity with AP then mac80211 will first tell us that the
781 * current channel is not HT anymore before removing the station. In such a
782 * scenario the RXON flags will be updated to indicate we are not
783 * communicating HT anymore, but the LQ command may still contain HT rates.
784 * Test for this to prevent driver from sending LQ command between the time
785 * RXON flags are updated and when LQ command is updated.
786 */
787static bool is_lq_table_valid(struct iwl_priv *priv,
788 struct iwl_rxon_context *ctx,
789 struct iwl_link_quality_cmd *lq)
790{
791 int i;
792
793 if (ctx->ht.enabled)
794 return true;
795
796 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
797 ctx->active.channel);
798 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
799 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
800 RATE_MCS_HT_MSK) {
801 IWL_DEBUG_INFO(priv,
802 "index %d of LQ expects HT channel\n",
803 i);
804 return false;
805 }
806 }
807 return true;
808}
809
810/**
811 * iwl_send_lq_cmd() - Send link quality command
812 * @init: This command is sent as part of station initialization right
813 * after station has been added.
814 *
815 * The link quality command is sent as the last step of station creation.
816 * This is the special case in which init is set and we call a callback in
817 * this case to clear the state indicating that station creation is in
818 * progress.
819 */
820int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
821 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
822{
823 int ret = 0;
824 struct iwl_host_cmd cmd = {
825 .id = REPLY_TX_LINK_QUALITY_CMD,
826 .len = { sizeof(struct iwl_link_quality_cmd), },
827 .flags = flags,
828 .data = { lq, },
829 };
830
831 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
832 return -EINVAL;
833
834
835 spin_lock_bh(&priv->sta_lock);
836 if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
837 spin_unlock_bh(&priv->sta_lock);
838 return -EINVAL;
839 }
840 spin_unlock_bh(&priv->sta_lock);
841
842 iwl_dump_lq_cmd(priv, lq);
843 if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
844 return -EINVAL;
845
846 if (is_lq_table_valid(priv, ctx, lq))
847 ret = iwl_dvm_send_cmd(priv, &cmd);
848 else
849 ret = -EINVAL;
850
851 if (cmd.flags & CMD_ASYNC)
852 return ret;
853
854 if (init) {
855 IWL_DEBUG_INFO(priv, "init LQ command complete, "
856 "clearing sta addition status for sta %d\n",
857 lq->sta_id);
858 spin_lock_bh(&priv->sta_lock);
859 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
860 spin_unlock_bh(&priv->sta_lock);
861 }
862 return ret;
863}
864
865
866static struct iwl_link_quality_cmd *
867iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
868 u8 sta_id)
869{
870 struct iwl_link_quality_cmd *link_cmd;
871
872 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
873 if (!link_cmd) {
874 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
875 return NULL;
876 }
877
878 iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
879
880 return link_cmd;
881}
882
883/*
884 * iwlagn_add_bssid_station - Add the special IBSS BSSID station
885 *
886 * Function sleeps.
887 */
888int iwlagn_add_bssid_station(struct iwl_priv *priv,
889 struct iwl_rxon_context *ctx,
890 const u8 *addr, u8 *sta_id_r)
891{
892 int ret;
893 u8 sta_id;
894 struct iwl_link_quality_cmd *link_cmd;
895
896 if (sta_id_r)
897 *sta_id_r = IWL_INVALID_STATION;
898
899 ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
900 if (ret) {
901 IWL_ERR(priv, "Unable to add station %pM\n", addr);
902 return ret;
903 }
904
905 if (sta_id_r)
906 *sta_id_r = sta_id;
907
908 spin_lock_bh(&priv->sta_lock);
909 priv->stations[sta_id].used |= IWL_STA_LOCAL;
910 spin_unlock_bh(&priv->sta_lock);
911
912 /* Set up default rate scaling table in device's station table */
913 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
914 if (!link_cmd) {
915 IWL_ERR(priv,
916 "Unable to initialize rate scaling for station %pM.\n",
917 addr);
918 return -ENOMEM;
919 }
920
921 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, 0, true);
922 if (ret)
923 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
924
925 spin_lock_bh(&priv->sta_lock);
926 priv->stations[sta_id].lq = link_cmd;
927 spin_unlock_bh(&priv->sta_lock);
928
929 return 0;
930}
931
932/*
933 * static WEP keys
934 *
935 * For each context, the device has a table of 4 static WEP keys
936 * (one for each key index) that is updated with the following
937 * commands.
938 */
939
940static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
941 struct iwl_rxon_context *ctx,
942 bool send_if_empty)
943{
944 int i, not_empty = 0;
945 u8 buff[sizeof(struct iwl_wep_cmd) +
946 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
947 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
948 size_t cmd_size = sizeof(struct iwl_wep_cmd);
949 struct iwl_host_cmd cmd = {
950 .id = ctx->wep_key_cmd,
951 .data = { wep_cmd, },
952 };
953
954 might_sleep();
955
956 memset(wep_cmd, 0, cmd_size +
957 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
958
959 for (i = 0; i < WEP_KEYS_MAX ; i++) {
960 wep_cmd->key[i].key_index = i;
961 if (ctx->wep_keys[i].key_size) {
962 wep_cmd->key[i].key_offset = i;
963 not_empty = 1;
964 } else {
965 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
966 }
967
968 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
969 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
970 ctx->wep_keys[i].key_size);
971 }
972
973 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
974 wep_cmd->num_keys = WEP_KEYS_MAX;
975
976 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
977
978 cmd.len[0] = cmd_size;
979
980 if (not_empty || send_if_empty)
981 return iwl_dvm_send_cmd(priv, &cmd);
982 else
983 return 0;
984}
985
986int iwl_restore_default_wep_keys(struct iwl_priv *priv,
987 struct iwl_rxon_context *ctx)
988{
989 lockdep_assert_held(&priv->mutex);
990
991 return iwl_send_static_wepkey_cmd(priv, ctx, false);
992}
993
994int iwl_remove_default_wep_key(struct iwl_priv *priv,
995 struct iwl_rxon_context *ctx,
996 struct ieee80211_key_conf *keyconf)
997{
998 int ret;
999
1000 lockdep_assert_held(&priv->mutex);
1001
1002 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1003 keyconf->keyidx);
1004
1005 memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1006 if (iwl_is_rfkill(priv)) {
1007 IWL_DEBUG_WEP(priv,
1008 "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1009 /* but keys in device are clear anyway so return success */
1010 return 0;
1011 }
1012 ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1013 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1014 keyconf->keyidx, ret);
1015
1016 return ret;
1017}
1018
1019int iwl_set_default_wep_key(struct iwl_priv *priv,
1020 struct iwl_rxon_context *ctx,
1021 struct ieee80211_key_conf *keyconf)
1022{
1023 int ret;
1024
1025 lockdep_assert_held(&priv->mutex);
1026
1027 if (keyconf->keylen != WEP_KEY_LEN_128 &&
1028 keyconf->keylen != WEP_KEY_LEN_64) {
1029 IWL_DEBUG_WEP(priv,
1030 "Bad WEP key length %d\n", keyconf->keylen);
1031 return -EINVAL;
1032 }
1033
1034 keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1035
1036 ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1037 memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1038 keyconf->keylen);
1039
1040 ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1041 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1042 keyconf->keylen, keyconf->keyidx, ret);
1043
1044 return ret;
1045}
1046
1047/*
1048 * dynamic (per-station) keys
1049 *
1050 * The dynamic keys are a little more complicated. The device has
1051 * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1052 * These are linked to stations by a table that contains an index
1053 * into the key table for each station/key index/{mcast,unicast},
1054 * i.e. it's basically an array of pointers like this:
1055 * key_offset_t key_mapping[NUM_STATIONS][4][2];
1056 * (it really works differently, but you can think of it as such)
1057 *
1058 * The key uploading and linking happens in the same command, the
1059 * add station command with STA_MODIFY_KEY_MASK.
1060 */
1061
1062static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1063 struct ieee80211_vif *vif,
1064 struct ieee80211_sta *sta)
1065{
1066 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1067
1068 if (sta)
1069 return iwl_sta_id(sta);
1070
1071 /*
1072 * The device expects GTKs for station interfaces to be
1073 * installed as GTKs for the AP station. If we have no
1074 * station ID, then use the ap_sta_id in that case.
1075 */
1076 if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
1077 return vif_priv->ctx->ap_sta_id;
1078
1079 return IWL_INVALID_STATION;
1080}
1081
1082static int iwlagn_send_sta_key(struct iwl_priv *priv,
1083 struct ieee80211_key_conf *keyconf,
1084 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1085 u32 cmd_flags)
1086{
1087 __le16 key_flags;
1088 struct iwl_addsta_cmd sta_cmd;
1089 int i;
1090
1091 spin_lock_bh(&priv->sta_lock);
1092 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1093 spin_unlock_bh(&priv->sta_lock);
1094
1095 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1096 key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1097
1098 switch (keyconf->cipher) {
1099 case WLAN_CIPHER_SUITE_CCMP:
1100 key_flags |= STA_KEY_FLG_CCMP;
1101 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1102 break;
1103 case WLAN_CIPHER_SUITE_TKIP:
1104 key_flags |= STA_KEY_FLG_TKIP;
1105 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1106 for (i = 0; i < 5; i++)
1107 sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1108 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1109 break;
1110 case WLAN_CIPHER_SUITE_WEP104:
1111 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1112 /* fall through */
1113 case WLAN_CIPHER_SUITE_WEP40:
1114 key_flags |= STA_KEY_FLG_WEP;
1115 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1116 break;
1117 default:
1118 WARN_ON(1);
1119 return -EINVAL;
1120 }
1121
1122 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1123 key_flags |= STA_KEY_MULTICAST_MSK;
1124
1125 /* key pointer (offset) */
1126 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1127
1128 sta_cmd.key.key_flags = key_flags;
1129 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1130 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1131
1132 return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1133}
1134
1135void iwl_update_tkip_key(struct iwl_priv *priv,
1136 struct ieee80211_vif *vif,
1137 struct ieee80211_key_conf *keyconf,
1138 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1139{
1140 u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1141
1142 if (sta_id == IWL_INVALID_STATION)
1143 return;
1144
1145 if (iwl_scan_cancel(priv)) {
1146 /* cancel scan failed, just live w/ bad key and rely
1147 briefly on SW decryption */
1148 return;
1149 }
1150
1151 iwlagn_send_sta_key(priv, keyconf, sta_id,
1152 iv32, phase1key, CMD_ASYNC);
1153}
1154
1155int iwl_remove_dynamic_key(struct iwl_priv *priv,
1156 struct iwl_rxon_context *ctx,
1157 struct ieee80211_key_conf *keyconf,
1158 struct ieee80211_sta *sta)
1159{
1160 struct iwl_addsta_cmd sta_cmd;
1161 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1162 __le16 key_flags;
1163
1164 /* if station isn't there, neither is the key */
1165 if (sta_id == IWL_INVALID_STATION)
1166 return -ENOENT;
1167
1168 spin_lock_bh(&priv->sta_lock);
1169 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1170 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1171 sta_id = IWL_INVALID_STATION;
1172 spin_unlock_bh(&priv->sta_lock);
1173
1174 if (sta_id == IWL_INVALID_STATION)
1175 return 0;
1176
1177 lockdep_assert_held(&priv->mutex);
1178
1179 ctx->key_mapping_keys--;
1180
1181 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1182 keyconf->keyidx, sta_id);
1183
1184 if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1185 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1186 keyconf->hw_key_idx);
1187
1188 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1189 key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
1190 STA_KEY_FLG_INVALID;
1191
1192 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1193 key_flags |= STA_KEY_MULTICAST_MSK;
1194
1195 sta_cmd.key.key_flags = key_flags;
1196 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1197 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1198 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1199
1200 return iwl_send_add_sta(priv, &sta_cmd, 0);
1201}
1202
1203int iwl_set_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 ieee80211_key_seq seq;
1209 u16 p1k[5];
1210 int ret;
1211 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1212 const u8 *addr;
1213
1214 if (sta_id == IWL_INVALID_STATION)
1215 return -EINVAL;
1216
1217 lockdep_assert_held(&priv->mutex);
1218
1219 keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1220 if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1221 return -ENOSPC;
1222
1223 ctx->key_mapping_keys++;
1224
1225 switch (keyconf->cipher) {
1226 case WLAN_CIPHER_SUITE_TKIP:
1227 if (sta)
1228 addr = sta->addr;
1229 else /* station mode case only */
1230 addr = ctx->active.bssid_addr;
1231
1232 /* pre-fill phase 1 key into device cache */
1233 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1234 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1235 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1236 seq.tkip.iv32, p1k, 0);
1237 break;
1238 case WLAN_CIPHER_SUITE_CCMP:
1239 case WLAN_CIPHER_SUITE_WEP40:
1240 case WLAN_CIPHER_SUITE_WEP104:
1241 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1242 0, NULL, 0);
1243 break;
1244 default:
1245 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1246 ret = -EINVAL;
1247 }
1248
1249 if (ret) {
1250 ctx->key_mapping_keys--;
1251 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1252 }
1253
1254 IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1255 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1256 sta ? sta->addr : NULL, ret);
1257
1258 return ret;
1259}
1260
1261/**
1262 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1263 *
1264 * This adds the broadcast station into the driver's station table
1265 * and marks it driver active, so that it will be restored to the
1266 * device at the next best time.
1267 */
1268int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1269 struct iwl_rxon_context *ctx)
1270{
1271 struct iwl_link_quality_cmd *link_cmd;
1272 u8 sta_id;
1273
1274 spin_lock_bh(&priv->sta_lock);
1275 sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1276 if (sta_id == IWL_INVALID_STATION) {
1277 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1278 spin_unlock_bh(&priv->sta_lock);
1279
1280 return -EINVAL;
1281 }
1282
1283 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1284 priv->stations[sta_id].used |= IWL_STA_BCAST;
1285 spin_unlock_bh(&priv->sta_lock);
1286
1287 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1288 if (!link_cmd) {
1289 IWL_ERR(priv,
1290 "Unable to initialize rate scaling for bcast station.\n");
1291 return -ENOMEM;
1292 }
1293
1294 spin_lock_bh(&priv->sta_lock);
1295 priv->stations[sta_id].lq = link_cmd;
1296 spin_unlock_bh(&priv->sta_lock);
1297
1298 return 0;
1299}
1300
1301/**
1302 * iwl_update_bcast_station - update broadcast station's LQ command
1303 *
1304 * Only used by iwlagn. Placed here to have all bcast station management
1305 * code together.
1306 */
1307int iwl_update_bcast_station(struct iwl_priv *priv,
1308 struct iwl_rxon_context *ctx)
1309{
1310 struct iwl_link_quality_cmd *link_cmd;
1311 u8 sta_id = ctx->bcast_sta_id;
1312
1313 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1314 if (!link_cmd) {
1315 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1316 return -ENOMEM;
1317 }
1318
1319 spin_lock_bh(&priv->sta_lock);
1320 if (priv->stations[sta_id].lq)
1321 kfree(priv->stations[sta_id].lq);
1322 else
1323 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1324 priv->stations[sta_id].lq = link_cmd;
1325 spin_unlock_bh(&priv->sta_lock);
1326
1327 return 0;
1328}
1329
1330int iwl_update_bcast_stations(struct iwl_priv *priv)
1331{
1332 struct iwl_rxon_context *ctx;
1333 int ret = 0;
1334
1335 for_each_context(priv, ctx) {
1336 ret = iwl_update_bcast_station(priv, ctx);
1337 if (ret)
1338 break;
1339 }
1340
1341 return ret;
1342}
1343
1344/**
1345 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1346 */
1347int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1348{
1349 struct iwl_addsta_cmd sta_cmd;
1350
1351 lockdep_assert_held(&priv->mutex);
1352
1353 /* Remove "disable" flag, to enable Tx for this TID */
1354 spin_lock_bh(&priv->sta_lock);
1355 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1356 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1357 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1358 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1359 spin_unlock_bh(&priv->sta_lock);
1360
1361 return iwl_send_add_sta(priv, &sta_cmd, 0);
1362}
1363
1364int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1365 int tid, u16 ssn)
1366{
1367 int sta_id;
1368 struct iwl_addsta_cmd sta_cmd;
1369
1370 lockdep_assert_held(&priv->mutex);
1371
1372 sta_id = iwl_sta_id(sta);
1373 if (sta_id == IWL_INVALID_STATION)
1374 return -ENXIO;
1375
1376 spin_lock_bh(&priv->sta_lock);
1377 priv->stations[sta_id].sta.station_flags_msk = 0;
1378 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1379 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1380 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1381 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1382 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1383 spin_unlock_bh(&priv->sta_lock);
1384
1385 return iwl_send_add_sta(priv, &sta_cmd, 0);
1386}
1387
1388int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1389 int tid)
1390{
1391 int sta_id;
1392 struct iwl_addsta_cmd sta_cmd;
1393
1394 lockdep_assert_held(&priv->mutex);
1395
1396 sta_id = iwl_sta_id(sta);
1397 if (sta_id == IWL_INVALID_STATION) {
1398 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1399 return -ENXIO;
1400 }
1401
1402 spin_lock_bh(&priv->sta_lock);
1403 priv->stations[sta_id].sta.station_flags_msk = 0;
1404 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1405 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1406 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1407 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1408 spin_unlock_bh(&priv->sta_lock);
1409
1410 return iwl_send_add_sta(priv, &sta_cmd, 0);
1411}
1412
1413
1414
1415void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1416{
1417 struct iwl_addsta_cmd cmd = {
1418 .mode = STA_CONTROL_MODIFY_MSK,
1419 .station_flags = STA_FLG_PWR_SAVE_MSK,
1420 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1421 .sta.sta_id = sta_id,
1422 .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK,
1423 .sleep_tx_count = cpu_to_le16(cnt),
1424 };
1425
1426 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1427}