1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
4 * Copyright(c) 2003 - 2014, 2022 Intel Corporation. All rights reserved.
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"
15 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
17 static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
19 lockdep_assert_held(&priv->sta_lock);
21 if (sta_id >= IWLAGN_STATION_COUNT) {
22 IWL_ERR(priv, "invalid sta_id %u\n", sta_id);
25 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
26 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
28 sta_id, priv->stations[sta_id].sta.sta.addr);
30 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
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);
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);
43 static void iwl_process_add_sta_resp(struct iwl_priv *priv,
44 struct iwl_rx_packet *pkt)
46 struct iwl_add_sta_resp *add_sta_resp = (void *)pkt->data;
48 IWL_DEBUG_INFO(priv, "Processing response for adding station\n");
50 spin_lock_bh(&priv->sta_lock);
52 switch (add_sta_resp->status) {
53 case ADD_STA_SUCCESS_MSK:
54 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
56 case ADD_STA_NO_ROOM_IN_TABLE:
57 IWL_ERR(priv, "Adding station failed, no room in table.\n");
59 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
61 "Adding station failed, no block ack resource.\n");
63 case ADD_STA_MODIFY_NON_EXIST_STA:
64 IWL_ERR(priv, "Attempting to modify non-existing station\n");
67 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
68 add_sta_resp->status);
72 spin_unlock_bh(&priv->sta_lock);
75 void iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
77 struct iwl_rx_packet *pkt = rxb_addr(rxb);
79 iwl_process_add_sta_resp(priv, pkt);
82 int iwl_send_add_sta(struct iwl_priv *priv,
83 struct iwl_addsta_cmd *sta, u8 flags)
86 struct iwl_host_cmd cmd = {
90 .len = { sizeof(*sta), },
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;
96 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
97 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
99 if (!(flags & CMD_ASYNC)) {
100 cmd.flags |= CMD_WANT_SKB;
104 ret = iwl_dvm_send_cmd(priv, &cmd);
106 if (ret || (flags & CMD_ASYNC))
110 add_sta_resp = (void *)pkt->data;
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);
126 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
127 struct iwl_rxon_context *ctx,
128 struct ieee80211_sta *sta)
130 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
133 #ifdef CONFIG_IWLWIFI_DEBUGFS
134 if (priv->disable_ht40)
138 /* special case for RXON */
142 return sta->deflink.bandwidth >= IEEE80211_STA_RX_BW_40;
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)
150 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->deflink.ht_cap;
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;
159 if (!sta || !sta_ht_inf->ht_supported)
162 IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n",
164 (sta->deflink.smps_mode == IEEE80211_SMPS_STATIC) ?
166 (sta->deflink.smps_mode == IEEE80211_SMPS_DYNAMIC) ?
167 "dynamic" : "disabled");
169 switch (sta->deflink.smps_mode) {
170 case IEEE80211_SMPS_STATIC:
171 *flags |= STA_FLG_MIMO_DIS_MSK;
173 case IEEE80211_SMPS_DYNAMIC:
174 *flags |= STA_FLG_RTS_MIMO_PROT_MSK;
176 case IEEE80211_SMPS_OFF:
179 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", sta->deflink.smps_mode);
183 *flags |= cpu_to_le32(
184 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
186 *flags |= cpu_to_le32(
187 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
189 if (iwl_is_ht40_tx_allowed(priv, ctx, sta))
190 *flags |= STA_FLG_HT40_EN_MSK;
193 int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
194 struct ieee80211_sta *sta)
196 u8 sta_id = iwl_sta_id(sta);
198 struct iwl_addsta_cmd cmd;
200 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
203 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
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);
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;
216 return iwl_send_add_sta(priv, &cmd, 0);
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)
225 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
227 lockdep_assert_held(&priv->sta_lock);
228 priv->stations[index].sta.station_flags &= ~mask;
229 priv->stations[index].sta.station_flags |= flags;
233 * iwl_prep_station - Prepare station information for addition
235 * should be called with sta_lock held
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)
240 struct iwl_station_entry *station;
242 u8 sta_id = IWL_INVALID_STATION;
245 sta_id = ctx->ap_sta_id;
246 else if (is_broadcast_ether_addr(addr))
247 sta_id = ctx->bcast_sta_id;
249 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
250 if (ether_addr_equal(priv->stations[i].sta.sta.addr,
256 if (!priv->stations[i].used &&
257 sta_id == IWL_INVALID_STATION)
262 * These two conditions have the same outcome, but keep them
265 if (unlikely(sta_id == IWL_INVALID_STATION))
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
273 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
274 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
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);
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",
291 priv->num_stations++;
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;
302 struct iwl_station_priv *sta_priv;
304 sta_priv = (void *)sta->drv_priv;
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.
313 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
319 #define STA_WAIT_TIMEOUT (HZ/2)
322 * iwl_add_station_common -
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)
330 struct iwl_addsta_cmd sta_cmd;
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",
338 spin_unlock_bh(&priv->sta_lock);
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
347 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
348 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
350 spin_unlock_bh(&priv->sta_lock);
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);
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);
367 /* Add station to device's station table */
368 ret = iwl_send_add_sta(priv, &sta_cmd, 0);
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);
382 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
384 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
386 lockdep_assert_held(&priv->sta_lock);
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);
394 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
396 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
397 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
400 static int iwl_send_remove_station(struct iwl_priv *priv,
401 const u8 *addr, int sta_id,
404 struct iwl_rx_packet *pkt;
406 struct iwl_rem_sta_cmd rm_sta_cmd;
407 struct iwl_rem_sta_resp *rem_sta_resp;
409 struct iwl_host_cmd cmd = {
410 .id = REPLY_REMOVE_STA,
411 .len = { sizeof(struct iwl_rem_sta_cmd), },
412 .data = { &rm_sta_cmd, },
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);
419 cmd.flags |= CMD_WANT_SKB;
421 ret = iwl_dvm_send_cmd(priv, &cmd);
427 rem_sta_resp = (void *)pkt->data;
429 switch (rem_sta_resp->status) {
430 case REM_STA_SUCCESS_MSK:
432 spin_lock_bh(&priv->sta_lock);
433 iwl_sta_ucode_deactivate(priv, sta_id);
434 spin_unlock_bh(&priv->sta_lock);
436 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
440 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
450 * iwl_remove_station - Remove driver's knowledge of station.
452 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
457 if (!iwl_is_ready(priv)) {
459 "Unable to remove station %pM, device not ready.\n",
462 * It is typical for stations to be removed when we are
463 * going down. Return success since device will be down
469 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
472 if (WARN_ON(sta_id == IWL_INVALID_STATION))
475 spin_lock_bh(&priv->sta_lock);
477 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
478 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
483 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
484 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
489 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
490 kfree(priv->stations[sta_id].lq);
491 priv->stations[sta_id].lq = NULL;
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]));
498 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
500 priv->num_stations--;
502 if (WARN_ON(priv->num_stations < 0))
503 priv->num_stations = 0;
505 spin_unlock_bh(&priv->sta_lock);
507 return iwl_send_remove_station(priv, addr, sta_id, false);
509 spin_unlock_bh(&priv->sta_lock);
513 void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
518 if (!iwl_is_ready(priv)) {
520 "Unable to remove station %pM, device not ready.\n",
525 IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id);
527 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
530 spin_lock_bh(&priv->sta_lock);
532 WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE));
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]));
538 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
539 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
541 priv->num_stations--;
543 if (WARN_ON_ONCE(priv->num_stations < 0))
544 priv->num_stations = 0;
546 spin_unlock_bh(&priv->sta_lock);
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)
556 lockdep_assert_held(&priv->mutex);
558 memset(link_cmd, 0, sizeof(*link_cmd));
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;
567 r = IWL_RATE_1M_INDEX;
569 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
570 rate_flags |= RATE_MCS_CCK_MSK;
572 rate_flags |= first_antenna(priv->nvm_data->valid_tx_ant) <<
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;
578 link_cmd->general_params.single_stream_ant_msk =
579 first_antenna(priv->nvm_data->valid_tx_ant);
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;
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);
596 link_cmd->sta_id = sta_id;
600 * iwl_clear_ucode_stations - clear ucode station table bits
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.
607 void iwl_clear_ucode_stations(struct iwl_priv *priv,
608 struct iwl_rxon_context *ctx)
611 bool cleared = false;
613 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
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)
620 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
622 "Clearing ucode active for station %d\n", i);
623 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
627 spin_unlock_bh(&priv->sta_lock);
631 "No active stations found to be cleared\n");
635 * iwl_restore_stations() - Restore driver known stations to device
637 * All stations considered active by driver, but not present in ucode, is
642 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
644 struct iwl_addsta_cmd sta_cmd;
645 static const struct iwl_link_quality_cmd zero_lq = {};
646 struct iwl_link_quality_cmd lq;
652 if (!iwl_is_ready(priv)) {
654 "Not ready yet, not restoring any stations.\n");
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)
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;
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));
678 if (priv->stations[i].lq) {
680 iwl_sta_fill_lq(priv, ctx, i, &lq);
682 memcpy(&lq, priv->stations[i].lq,
683 sizeof(struct iwl_link_quality_cmd));
685 if (memcmp(&lq, &zero_lq, sizeof(lq)))
688 spin_unlock_bh(&priv->sta_lock);
689 ret = iwl_send_add_sta(priv, &sta_cmd, 0);
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;
701 * Rate scaling has already been initialized, send
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;
711 spin_unlock_bh(&priv->sta_lock);
713 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
714 "no stations to be restored.\n");
716 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
720 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
724 for (i = 0; i < priv->sta_key_max_num; i++)
725 if (!test_and_set_bit(i, &priv->ucode_key_table))
728 return WEP_INVALID_OFFSET;
731 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
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))
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;
747 spin_unlock_bh(&priv->sta_lock);
750 #ifdef CONFIG_IWLWIFI_DEBUG
751 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
752 struct iwl_link_quality_cmd *lq)
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);
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);
765 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
766 struct iwl_link_quality_cmd *lq)
772 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
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.
782 static bool is_lq_table_valid(struct iwl_priv *priv,
783 struct iwl_rxon_context *ctx,
784 struct iwl_link_quality_cmd *lq)
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) &
797 "index %d of LQ expects HT channel\n",
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.
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
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)
819 struct iwl_host_cmd cmd = {
820 .id = REPLY_TX_LINK_QUALITY_CMD,
821 .len = { sizeof(struct iwl_link_quality_cmd), },
826 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
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);
835 spin_unlock_bh(&priv->sta_lock);
837 iwl_dump_lq_cmd(priv, lq);
838 if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
841 if (is_lq_table_valid(priv, ctx, lq))
842 ret = iwl_dvm_send_cmd(priv, &cmd);
846 if (cmd.flags & CMD_ASYNC)
850 IWL_DEBUG_INFO(priv, "init LQ command complete, "
851 "clearing sta addition status for sta %d\n",
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);
861 static struct iwl_link_quality_cmd *
862 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
865 struct iwl_link_quality_cmd *link_cmd;
867 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
869 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
873 iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
879 * iwlagn_add_bssid_station - Add the special IBSS BSSID station
883 int iwlagn_add_bssid_station(struct iwl_priv *priv,
884 struct iwl_rxon_context *ctx,
885 const u8 *addr, u8 *sta_id_r)
889 struct iwl_link_quality_cmd *link_cmd;
892 *sta_id_r = IWL_INVALID_STATION;
894 ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
896 IWL_ERR(priv, "Unable to add station %pM\n", addr);
903 spin_lock_bh(&priv->sta_lock);
904 priv->stations[sta_id].used |= IWL_STA_LOCAL;
905 spin_unlock_bh(&priv->sta_lock);
907 /* Set up default rate scaling table in device's station table */
908 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
911 "Unable to initialize rate scaling for station %pM.\n",
916 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, 0, true);
918 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
920 spin_lock_bh(&priv->sta_lock);
921 priv->stations[sta_id].lq = link_cmd;
922 spin_unlock_bh(&priv->sta_lock);
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
935 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
936 struct iwl_rxon_context *ctx,
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, },
951 memset(wep_cmd, 0, cmd_size +
952 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
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;
960 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
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);
968 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
969 wep_cmd->num_keys = WEP_KEYS_MAX;
971 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
973 cmd.len[0] = cmd_size;
975 if (not_empty || send_if_empty)
976 return iwl_dvm_send_cmd(priv, &cmd);
981 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
982 struct iwl_rxon_context *ctx)
984 lockdep_assert_held(&priv->mutex);
986 return iwl_send_static_wepkey_cmd(priv, ctx, false);
989 int iwl_remove_default_wep_key(struct iwl_priv *priv,
990 struct iwl_rxon_context *ctx,
991 struct ieee80211_key_conf *keyconf)
995 lockdep_assert_held(&priv->mutex);
997 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1000 memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1001 if (iwl_is_rfkill(priv)) {
1003 "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1004 /* but keys in device are clear anyway so return success */
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);
1014 int iwl_set_default_wep_key(struct iwl_priv *priv,
1015 struct iwl_rxon_context *ctx,
1016 struct ieee80211_key_conf *keyconf)
1020 lockdep_assert_held(&priv->mutex);
1022 if (keyconf->keylen != WEP_KEY_LEN_128 &&
1023 keyconf->keylen != WEP_KEY_LEN_64) {
1025 "Bad WEP key length %d\n", keyconf->keylen);
1029 keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1031 ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1032 memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
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);
1043 * dynamic (per-station) keys
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)
1053 * The key uploading and linking happens in the same command, the
1054 * add station command with STA_MODIFY_KEY_MASK.
1057 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1058 struct ieee80211_vif *vif,
1059 struct ieee80211_sta *sta)
1061 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1064 return iwl_sta_id(sta);
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.
1071 if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
1072 return vif_priv->ctx->ap_sta_id;
1074 return IWL_INVALID_STATION;
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,
1083 struct iwl_addsta_cmd sta_cmd;
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);
1091 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1092 key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
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);
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);
1108 case WLAN_CIPHER_SUITE_WEP104:
1109 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1111 case WLAN_CIPHER_SUITE_WEP40:
1112 key_flags |= STA_KEY_FLG_WEP;
1113 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1120 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1121 key_flags |= STA_KEY_MULTICAST_MSK;
1123 /* key pointer (offset) */
1124 sta_cmd.key.key_offset = keyconf->hw_key_idx;
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;
1130 return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
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)
1138 u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1140 if (sta_id == IWL_INVALID_STATION)
1143 if (iwl_scan_cancel(priv)) {
1144 /* cancel scan failed, just live w/ bad key and rely
1145 briefly on SW decryption */
1149 iwlagn_send_sta_key(priv, keyconf, sta_id,
1150 iv32, phase1key, CMD_ASYNC);
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)
1158 struct iwl_addsta_cmd sta_cmd;
1159 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1162 /* if station isn't there, neither is the key */
1163 if (sta_id == IWL_INVALID_STATION)
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);
1172 if (sta_id == IWL_INVALID_STATION)
1175 lockdep_assert_held(&priv->mutex);
1177 ctx->key_mapping_keys--;
1179 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1180 keyconf->keyidx, sta_id);
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);
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;
1190 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1191 key_flags |= STA_KEY_MULTICAST_MSK;
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;
1198 return iwl_send_add_sta(priv, &sta_cmd, 0);
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)
1206 struct ieee80211_key_seq seq;
1209 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1212 if (sta_id == IWL_INVALID_STATION)
1215 lockdep_assert_held(&priv->mutex);
1217 keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1218 if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1221 ctx->key_mapping_keys++;
1223 switch (keyconf->cipher) {
1224 case WLAN_CIPHER_SUITE_TKIP:
1227 else /* station mode case only */
1228 addr = ctx->active.bssid_addr;
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);
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,
1243 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1248 ctx->key_mapping_keys--;
1249 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
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);
1260 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
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.
1266 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1267 struct iwl_rxon_context *ctx)
1269 struct iwl_link_quality_cmd *link_cmd;
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);
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);
1285 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1288 "Unable to initialize rate scaling for bcast station.\n");
1292 spin_lock_bh(&priv->sta_lock);
1293 priv->stations[sta_id].lq = link_cmd;
1294 spin_unlock_bh(&priv->sta_lock);
1300 * iwl_update_bcast_station - update broadcast station's LQ command
1302 * Only used by iwlagn. Placed here to have all bcast station management
1305 int iwl_update_bcast_station(struct iwl_priv *priv,
1306 struct iwl_rxon_context *ctx)
1308 struct iwl_link_quality_cmd *link_cmd;
1309 u8 sta_id = ctx->bcast_sta_id;
1311 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1313 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1317 spin_lock_bh(&priv->sta_lock);
1318 if (priv->stations[sta_id].lq)
1319 kfree(priv->stations[sta_id].lq);
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);
1328 int iwl_update_bcast_stations(struct iwl_priv *priv)
1330 struct iwl_rxon_context *ctx;
1333 for_each_context(priv, ctx) {
1334 ret = iwl_update_bcast_station(priv, ctx);
1343 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1345 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1347 struct iwl_addsta_cmd sta_cmd;
1349 lockdep_assert_held(&priv->mutex);
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);
1359 return iwl_send_add_sta(priv, &sta_cmd, 0);
1362 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1366 struct iwl_addsta_cmd sta_cmd;
1368 lockdep_assert_held(&priv->mutex);
1370 sta_id = iwl_sta_id(sta);
1371 if (sta_id == IWL_INVALID_STATION)
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);
1383 return iwl_send_add_sta(priv, &sta_cmd, 0);
1386 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1390 struct iwl_addsta_cmd sta_cmd;
1392 lockdep_assert_held(&priv->mutex);
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);
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);
1408 return iwl_send_add_sta(priv, &sta_cmd, 0);
1413 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
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),
1424 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);