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
15 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
16
iwl_sta_ucode_activate(struct iwl_priv * priv,u8 sta_id)17 static 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
iwl_process_add_sta_resp(struct iwl_priv * priv,struct iwl_rx_packet * pkt)43 static 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
iwl_add_sta_callback(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)75 void 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
iwl_send_add_sta(struct iwl_priv * priv,struct iwl_addsta_cmd * sta,u8 flags)82 int 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
iwl_is_ht40_tx_allowed(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_sta * sta)126 bool 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
iwl_sta_calc_ht_flags(struct iwl_priv * priv,struct ieee80211_sta * sta,struct iwl_rxon_context * ctx,__le32 * flags,__le32 * mask)145 static 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
iwl_sta_update_ht(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_sta * sta)193 int 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
iwl_set_ht_add_station(struct iwl_priv * priv,u8 index,struct ieee80211_sta * sta,struct iwl_rxon_context * ctx)219 static 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 */
iwl_prep_station(struct iwl_priv * priv,struct iwl_rxon_context * ctx,const u8 * addr,bool is_ap,struct ieee80211_sta * sta)237 u8 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 */
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)324 int 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 */
iwl_sta_ucode_deactivate(struct iwl_priv * priv,u8 sta_id)384 static 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
iwl_send_remove_station(struct iwl_priv * priv,const u8 * addr,int sta_id,bool temporary)400 static 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 */
iwl_remove_station(struct iwl_priv * priv,const u8 sta_id,const u8 * addr)452 int 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);
508 out_err:
509 spin_unlock_bh(&priv->sta_lock);
510 return -EINVAL;
511 }
512
iwl_deactivate_station(struct iwl_priv * priv,const u8 sta_id,const u8 * addr)513 void 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
iwl_sta_fill_lq(struct iwl_priv * priv,struct iwl_rxon_context * ctx,u8 sta_id,struct iwl_link_quality_cmd * link_cmd)549 static 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 */
iwl_clear_ucode_stations(struct iwl_priv * priv,struct iwl_rxon_context * ctx)607 void 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 */
iwl_restore_stations(struct iwl_priv * priv,struct iwl_rxon_context * ctx)642 void 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
iwl_get_free_ucode_key_offset(struct iwl_priv * priv)720 int 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
iwl_dealloc_bcast_stations(struct iwl_priv * priv)731 void 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
iwl_dump_lq_cmd(struct iwl_priv * priv,struct iwl_link_quality_cmd * lq)751 static 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
iwl_dump_lq_cmd(struct iwl_priv * priv,struct iwl_link_quality_cmd * lq)765 static 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 */
is_lq_table_valid(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct iwl_link_quality_cmd * lq)782 static 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 */
iwl_send_lq_cmd(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct iwl_link_quality_cmd * lq,u8 flags,bool init)815 int 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
861 static struct iwl_link_quality_cmd *
iwl_sta_alloc_lq(struct iwl_priv * priv,struct iwl_rxon_context * ctx,u8 sta_id)862 iwl_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 */
iwlagn_add_bssid_station(struct iwl_priv * priv,struct iwl_rxon_context * ctx,const u8 * addr,u8 * sta_id_r)883 int 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
iwl_send_static_wepkey_cmd(struct iwl_priv * priv,struct iwl_rxon_context * ctx,bool send_if_empty)935 static 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
iwl_restore_default_wep_keys(struct iwl_priv * priv,struct iwl_rxon_context * ctx)981 int 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
iwl_remove_default_wep_key(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_key_conf * keyconf)989 int 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
iwl_set_default_wep_key(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_key_conf * keyconf)1014 int 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
iwlagn_key_sta_id(struct iwl_priv * priv,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1057 static 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
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)1077 static 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 int i;
1085
1086 spin_lock_bh(&priv->sta_lock);
1087 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1088 spin_unlock_bh(&priv->sta_lock);
1089
1090 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1091 key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1092
1093 switch (keyconf->cipher) {
1094 case WLAN_CIPHER_SUITE_CCMP:
1095 key_flags |= STA_KEY_FLG_CCMP;
1096 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1097 break;
1098 case WLAN_CIPHER_SUITE_TKIP:
1099 key_flags |= STA_KEY_FLG_TKIP;
1100 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1101 for (i = 0; i < 5; i++)
1102 sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1103 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1104 break;
1105 case WLAN_CIPHER_SUITE_WEP104:
1106 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1107 fallthrough;
1108 case WLAN_CIPHER_SUITE_WEP40:
1109 key_flags |= STA_KEY_FLG_WEP;
1110 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1111 break;
1112 default:
1113 WARN_ON(1);
1114 return -EINVAL;
1115 }
1116
1117 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1118 key_flags |= STA_KEY_MULTICAST_MSK;
1119
1120 /* key pointer (offset) */
1121 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1122
1123 sta_cmd.key.key_flags = key_flags;
1124 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1125 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1126
1127 return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1128 }
1129
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)1130 void iwl_update_tkip_key(struct iwl_priv *priv,
1131 struct ieee80211_vif *vif,
1132 struct ieee80211_key_conf *keyconf,
1133 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1134 {
1135 u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1136
1137 if (sta_id == IWL_INVALID_STATION)
1138 return;
1139
1140 if (iwl_scan_cancel(priv)) {
1141 /* cancel scan failed, just live w/ bad key and rely
1142 briefly on SW decryption */
1143 return;
1144 }
1145
1146 iwlagn_send_sta_key(priv, keyconf, sta_id,
1147 iv32, phase1key, CMD_ASYNC);
1148 }
1149
iwl_remove_dynamic_key(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_key_conf * keyconf,struct ieee80211_sta * sta)1150 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1151 struct iwl_rxon_context *ctx,
1152 struct ieee80211_key_conf *keyconf,
1153 struct ieee80211_sta *sta)
1154 {
1155 struct iwl_addsta_cmd sta_cmd;
1156 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1157 __le16 key_flags;
1158
1159 /* if station isn't there, neither is the key */
1160 if (sta_id == IWL_INVALID_STATION)
1161 return -ENOENT;
1162
1163 spin_lock_bh(&priv->sta_lock);
1164 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1165 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1166 sta_id = IWL_INVALID_STATION;
1167 spin_unlock_bh(&priv->sta_lock);
1168
1169 if (sta_id == IWL_INVALID_STATION)
1170 return 0;
1171
1172 lockdep_assert_held(&priv->mutex);
1173
1174 ctx->key_mapping_keys--;
1175
1176 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1177 keyconf->keyidx, sta_id);
1178
1179 if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1180 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1181 keyconf->hw_key_idx);
1182
1183 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1184 key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
1185 STA_KEY_FLG_INVALID;
1186
1187 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1188 key_flags |= STA_KEY_MULTICAST_MSK;
1189
1190 sta_cmd.key.key_flags = key_flags;
1191 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1192 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1193 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1194
1195 return iwl_send_add_sta(priv, &sta_cmd, 0);
1196 }
1197
iwl_set_dynamic_key(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_key_conf * keyconf,struct ieee80211_sta * sta)1198 int iwl_set_dynamic_key(struct iwl_priv *priv,
1199 struct iwl_rxon_context *ctx,
1200 struct ieee80211_key_conf *keyconf,
1201 struct ieee80211_sta *sta)
1202 {
1203 struct ieee80211_key_seq seq;
1204 u16 p1k[5];
1205 int ret;
1206 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1207 const u8 *addr;
1208
1209 if (sta_id == IWL_INVALID_STATION)
1210 return -EINVAL;
1211
1212 lockdep_assert_held(&priv->mutex);
1213
1214 keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1215 if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1216 return -ENOSPC;
1217
1218 ctx->key_mapping_keys++;
1219
1220 switch (keyconf->cipher) {
1221 case WLAN_CIPHER_SUITE_TKIP:
1222 if (sta)
1223 addr = sta->addr;
1224 else /* station mode case only */
1225 addr = ctx->active.bssid_addr;
1226
1227 /* pre-fill phase 1 key into device cache */
1228 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1229 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1230 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1231 seq.tkip.iv32, p1k, 0);
1232 break;
1233 case WLAN_CIPHER_SUITE_CCMP:
1234 case WLAN_CIPHER_SUITE_WEP40:
1235 case WLAN_CIPHER_SUITE_WEP104:
1236 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1237 0, NULL, 0);
1238 break;
1239 default:
1240 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1241 ret = -EINVAL;
1242 }
1243
1244 if (ret) {
1245 ctx->key_mapping_keys--;
1246 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1247 }
1248
1249 IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1250 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1251 sta ? sta->addr : NULL, ret);
1252
1253 return ret;
1254 }
1255
1256 /*
1257 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1258 *
1259 * This adds the broadcast station into the driver's station table
1260 * and marks it driver active, so that it will be restored to the
1261 * device at the next best time.
1262 */
iwlagn_alloc_bcast_station(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1263 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1264 struct iwl_rxon_context *ctx)
1265 {
1266 struct iwl_link_quality_cmd *link_cmd;
1267 u8 sta_id;
1268
1269 spin_lock_bh(&priv->sta_lock);
1270 sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1271 if (sta_id == IWL_INVALID_STATION) {
1272 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1273 spin_unlock_bh(&priv->sta_lock);
1274
1275 return -EINVAL;
1276 }
1277
1278 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1279 priv->stations[sta_id].used |= IWL_STA_BCAST;
1280 spin_unlock_bh(&priv->sta_lock);
1281
1282 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1283 if (!link_cmd) {
1284 IWL_ERR(priv,
1285 "Unable to initialize rate scaling for bcast station.\n");
1286 return -ENOMEM;
1287 }
1288
1289 spin_lock_bh(&priv->sta_lock);
1290 priv->stations[sta_id].lq = link_cmd;
1291 spin_unlock_bh(&priv->sta_lock);
1292
1293 return 0;
1294 }
1295
1296 /*
1297 * iwl_update_bcast_station - update broadcast station's LQ command
1298 *
1299 * Only used by iwlagn. Placed here to have all bcast station management
1300 * code together.
1301 */
iwl_update_bcast_station(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1302 int iwl_update_bcast_station(struct iwl_priv *priv,
1303 struct iwl_rxon_context *ctx)
1304 {
1305 struct iwl_link_quality_cmd *link_cmd;
1306 u8 sta_id = ctx->bcast_sta_id;
1307
1308 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1309 if (!link_cmd) {
1310 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1311 return -ENOMEM;
1312 }
1313
1314 spin_lock_bh(&priv->sta_lock);
1315 if (priv->stations[sta_id].lq)
1316 kfree(priv->stations[sta_id].lq);
1317 else
1318 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1319 priv->stations[sta_id].lq = link_cmd;
1320 spin_unlock_bh(&priv->sta_lock);
1321
1322 return 0;
1323 }
1324
iwl_update_bcast_stations(struct iwl_priv * priv)1325 int iwl_update_bcast_stations(struct iwl_priv *priv)
1326 {
1327 struct iwl_rxon_context *ctx;
1328 int ret = 0;
1329
1330 for_each_context(priv, ctx) {
1331 ret = iwl_update_bcast_station(priv, ctx);
1332 if (ret)
1333 break;
1334 }
1335
1336 return ret;
1337 }
1338
1339 /*
1340 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1341 */
iwl_sta_tx_modify_enable_tid(struct iwl_priv * priv,int sta_id,int tid)1342 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1343 {
1344 struct iwl_addsta_cmd sta_cmd;
1345
1346 lockdep_assert_held(&priv->mutex);
1347
1348 /* Remove "disable" flag, to enable Tx for this TID */
1349 spin_lock_bh(&priv->sta_lock);
1350 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1351 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1352 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1353 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1354 spin_unlock_bh(&priv->sta_lock);
1355
1356 return iwl_send_add_sta(priv, &sta_cmd, 0);
1357 }
1358
iwl_sta_rx_agg_start(struct iwl_priv * priv,struct ieee80211_sta * sta,int tid,u16 ssn)1359 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1360 int tid, u16 ssn)
1361 {
1362 int sta_id;
1363 struct iwl_addsta_cmd sta_cmd;
1364
1365 lockdep_assert_held(&priv->mutex);
1366
1367 sta_id = iwl_sta_id(sta);
1368 if (sta_id == IWL_INVALID_STATION)
1369 return -ENXIO;
1370
1371 spin_lock_bh(&priv->sta_lock);
1372 priv->stations[sta_id].sta.station_flags_msk = 0;
1373 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1374 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1375 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1376 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1377 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1378 spin_unlock_bh(&priv->sta_lock);
1379
1380 return iwl_send_add_sta(priv, &sta_cmd, 0);
1381 }
1382
iwl_sta_rx_agg_stop(struct iwl_priv * priv,struct ieee80211_sta * sta,int tid)1383 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1384 int tid)
1385 {
1386 int sta_id;
1387 struct iwl_addsta_cmd sta_cmd;
1388
1389 lockdep_assert_held(&priv->mutex);
1390
1391 sta_id = iwl_sta_id(sta);
1392 if (sta_id == IWL_INVALID_STATION) {
1393 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1394 return -ENXIO;
1395 }
1396
1397 spin_lock_bh(&priv->sta_lock);
1398 priv->stations[sta_id].sta.station_flags_msk = 0;
1399 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1400 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1401 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1402 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1403 spin_unlock_bh(&priv->sta_lock);
1404
1405 return iwl_send_add_sta(priv, &sta_cmd, 0);
1406 }
1407
1408
1409
iwl_sta_modify_sleep_tx_count(struct iwl_priv * priv,int sta_id,int cnt)1410 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1411 {
1412 struct iwl_addsta_cmd cmd = {
1413 .mode = STA_CONTROL_MODIFY_MSK,
1414 .station_flags = STA_FLG_PWR_SAVE_MSK,
1415 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1416 .sta.sta_id = sta_id,
1417 .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK,
1418 .sleep_tx_count = cpu_to_le16(cnt),
1419 };
1420
1421 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1422 }
1423