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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
15 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
16
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
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
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
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
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
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
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
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  */
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  */
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  */
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
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  */
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
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
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  */
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  */
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
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
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
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
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  */
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  */
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 *
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  */
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
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
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
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
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
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
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         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
1133 void 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
1153 int 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
1201 int 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  */
1266 int 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  */
1305 int 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
1328 int 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  */
1345 int 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
1362 int 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
1386 int 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
1413 void 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 }
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