1 /******************************************************************************
3 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *****************************************************************************/
30 #include <net/mac80211.h>
31 #include <linux/etherdevice.h>
32 #include <linux/sched.h>
33 #include <linux/lockdep.h>
39 /* priv->sta_lock must be held */
40 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
43 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
44 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
45 sta_id, priv->stations[sta_id].sta.sta.addr);
47 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
49 "STA id %u addr %pM already present in uCode (according to driver)\n",
50 sta_id, priv->stations[sta_id].sta.sta.addr);
52 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
53 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
54 sta_id, priv->stations[sta_id].sta.sta.addr);
58 static int iwl_process_add_sta_resp(struct iwl_priv *priv,
59 struct iwl_addsta_cmd *addsta,
60 struct iwl_rx_packet *pkt,
63 u8 sta_id = addsta->sta.sta_id;
67 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
68 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
73 IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
76 spin_lock_irqsave(&priv->sta_lock, flags);
78 switch (pkt->u.add_sta.status) {
79 case ADD_STA_SUCCESS_MSK:
80 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
81 iwl_sta_ucode_activate(priv, sta_id);
84 case ADD_STA_NO_ROOM_IN_TABLE:
85 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
88 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
89 IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n",
92 case ADD_STA_MODIFY_NON_EXIST_STA:
93 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
97 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
98 pkt->u.add_sta.status);
102 IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
103 priv->stations[sta_id].sta.mode ==
104 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
105 sta_id, priv->stations[sta_id].sta.sta.addr);
108 * XXX: The MAC address in the command buffer is often changed from
109 * the original sent to the device. That is, the MAC address
110 * written to the command buffer often is not the same MAC address
111 * read from the command buffer when the command returns. This
112 * issue has not yet been resolved and this debugging is left to
113 * observe the problem.
115 IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
116 priv->stations[sta_id].sta.mode ==
117 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
119 spin_unlock_irqrestore(&priv->sta_lock, flags);
124 static void iwl_add_sta_callback(struct iwl_priv *priv,
125 struct iwl_device_cmd *cmd,
126 struct iwl_rx_packet *pkt)
128 struct iwl_addsta_cmd *addsta =
129 (struct iwl_addsta_cmd *)cmd->cmd.payload;
131 iwl_process_add_sta_resp(priv, addsta, pkt, false);
135 int iwl_send_add_sta(struct iwl_priv *priv,
136 struct iwl_addsta_cmd *sta, u8 flags)
138 struct iwl_rx_packet *pkt = NULL;
140 u8 data[sizeof(*sta)];
141 struct iwl_host_cmd cmd = {
146 u8 sta_id __maybe_unused = sta->sta.sta_id;
148 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
149 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
151 if (flags & CMD_ASYNC)
152 cmd.callback = iwl_add_sta_callback;
154 cmd.flags |= CMD_WANT_SKB;
158 cmd.len[0] = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
159 ret = iwl_send_cmd(priv, &cmd);
161 if (ret || (flags & CMD_ASYNC))
165 pkt = (struct iwl_rx_packet *)cmd.reply_page;
166 ret = iwl_process_add_sta_resp(priv, sta, pkt, true);
168 iwl_free_pages(priv, cmd.reply_page);
173 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
174 struct ieee80211_sta *sta,
175 struct iwl_rxon_context *ctx)
177 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
181 if (!sta || !sta_ht_inf->ht_supported)
184 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
185 IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
186 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
188 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
189 "dynamic" : "disabled");
191 sta_flags = priv->stations[index].sta.station_flags;
193 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
195 switch (mimo_ps_mode) {
196 case WLAN_HT_CAP_SM_PS_STATIC:
197 sta_flags |= STA_FLG_MIMO_DIS_MSK;
199 case WLAN_HT_CAP_SM_PS_DYNAMIC:
200 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
202 case WLAN_HT_CAP_SM_PS_DISABLED:
205 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
209 sta_flags |= cpu_to_le32(
210 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
212 sta_flags |= cpu_to_le32(
213 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
215 if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
216 sta_flags |= STA_FLG_HT40_EN_MSK;
218 sta_flags &= ~STA_FLG_HT40_EN_MSK;
220 priv->stations[index].sta.station_flags = sta_flags;
226 * iwl_prep_station - Prepare station information for addition
228 * should be called with sta_lock held
230 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
231 const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
233 struct iwl_station_entry *station;
235 u8 sta_id = IWL_INVALID_STATION;
238 sta_id = ctx->ap_sta_id;
239 else if (is_broadcast_ether_addr(addr))
240 sta_id = ctx->bcast_sta_id;
242 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
243 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
249 if (!priv->stations[i].used &&
250 sta_id == IWL_INVALID_STATION)
255 * These two conditions have the same outcome, but keep them
258 if (unlikely(sta_id == IWL_INVALID_STATION))
262 * uCode is not able to deal with multiple requests to add a
263 * station. Keep track if one is in progress so that we do not send
266 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
267 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
272 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
273 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
274 !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
275 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
280 station = &priv->stations[sta_id];
281 station->used = IWL_STA_DRIVER_ACTIVE;
282 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
284 priv->num_stations++;
286 /* Set up the REPLY_ADD_STA command to send to device */
287 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
288 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
289 station->sta.mode = 0;
290 station->sta.sta.sta_id = sta_id;
291 station->sta.station_flags = ctx->station_flags;
292 station->ctxid = ctx->ctxid;
295 struct iwl_station_priv_common *sta_priv;
297 sta_priv = (void *)sta->drv_priv;
302 * OK to call unconditionally, since local stations (IBSS BSSID
303 * STA and broadcast STA) pass in a NULL sta, and mac80211
304 * doesn't allow HT IBSS.
306 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
312 #define STA_WAIT_TIMEOUT (HZ/2)
315 * iwl_add_station_common -
317 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
318 const u8 *addr, bool is_ap,
319 struct ieee80211_sta *sta, u8 *sta_id_r)
321 unsigned long flags_spin;
324 struct iwl_addsta_cmd sta_cmd;
327 spin_lock_irqsave(&priv->sta_lock, flags_spin);
328 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
329 if (sta_id == IWL_INVALID_STATION) {
330 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
332 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
337 * uCode is not able to deal with multiple requests to add a
338 * station. Keep track if one is in progress so that we do not send
341 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
342 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
344 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
348 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
349 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
350 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
352 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
356 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
357 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
358 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
360 /* Add station to device's station table */
361 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
363 spin_lock_irqsave(&priv->sta_lock, flags_spin);
364 IWL_ERR(priv, "Adding station %pM failed.\n",
365 priv->stations[sta_id].sta.sta.addr);
366 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
367 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
368 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
375 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
377 * priv->sta_lock must be held
379 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
381 /* Ucode must be active and driver must be non active */
382 if ((priv->stations[sta_id].used &
383 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE)
384 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
386 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
388 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
389 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
392 static int iwl_send_remove_station(struct iwl_priv *priv,
393 const u8 *addr, int sta_id,
396 struct iwl_rx_packet *pkt;
399 unsigned long flags_spin;
400 struct iwl_rem_sta_cmd rm_sta_cmd;
402 struct iwl_host_cmd cmd = {
403 .id = REPLY_REMOVE_STA,
404 .len = { sizeof(struct iwl_rem_sta_cmd), },
406 .data = { &rm_sta_cmd, },
409 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
410 rm_sta_cmd.num_sta = 1;
411 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
413 cmd.flags |= CMD_WANT_SKB;
415 ret = iwl_send_cmd(priv, &cmd);
420 pkt = (struct iwl_rx_packet *)cmd.reply_page;
421 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
422 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
428 switch (pkt->u.rem_sta.status) {
429 case REM_STA_SUCCESS_MSK:
431 spin_lock_irqsave(&priv->sta_lock, flags_spin);
432 iwl_sta_ucode_deactivate(priv, sta_id);
433 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
435 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
439 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
443 iwl_free_pages(priv, cmd.reply_page);
449 * iwl_remove_station - Remove driver's knowledge of station.
451 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
456 if (!iwl_is_ready(priv)) {
458 "Unable to remove station %pM, device not ready.\n",
461 * It is typical for stations to be removed when we are
462 * going down. Return success since device will be down
468 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
471 if (WARN_ON(sta_id == IWL_INVALID_STATION))
474 spin_lock_irqsave(&priv->sta_lock, flags);
476 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
477 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
482 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
483 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
488 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
489 kfree(priv->stations[sta_id].lq);
490 priv->stations[sta_id].lq = NULL;
493 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
495 priv->num_stations--;
497 if (WARN_ON(priv->num_stations < 0))
498 priv->num_stations = 0;
500 spin_unlock_irqrestore(&priv->sta_lock, flags);
502 return iwl_send_remove_station(priv, addr, sta_id, false);
504 spin_unlock_irqrestore(&priv->sta_lock, flags);
509 * iwl_clear_ucode_stations - clear ucode station table bits
511 * This function clears all the bits in the driver indicating
512 * which stations are active in the ucode. Call when something
513 * other than explicit station management would cause this in
514 * the ucode, e.g. unassociated RXON.
516 void iwl_clear_ucode_stations(struct iwl_priv *priv,
517 struct iwl_rxon_context *ctx)
520 unsigned long flags_spin;
521 bool cleared = false;
523 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
525 spin_lock_irqsave(&priv->sta_lock, flags_spin);
526 for (i = 0; i < priv->hw_params.max_stations; i++) {
527 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
530 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
531 IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
532 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
536 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
539 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
543 * iwl_restore_stations() - Restore driver known stations to device
545 * All stations considered active by driver, but not present in ucode, is
550 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
552 struct iwl_addsta_cmd sta_cmd;
553 struct iwl_link_quality_cmd lq;
554 unsigned long flags_spin;
560 if (!iwl_is_ready(priv)) {
561 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
565 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
566 spin_lock_irqsave(&priv->sta_lock, flags_spin);
567 for (i = 0; i < priv->hw_params.max_stations; i++) {
568 if (ctx->ctxid != priv->stations[i].ctxid)
570 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
571 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
572 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
573 priv->stations[i].sta.sta.addr);
574 priv->stations[i].sta.mode = 0;
575 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
580 for (i = 0; i < priv->hw_params.max_stations; i++) {
581 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
582 memcpy(&sta_cmd, &priv->stations[i].sta,
583 sizeof(struct iwl_addsta_cmd));
585 if (priv->stations[i].lq) {
586 memcpy(&lq, priv->stations[i].lq,
587 sizeof(struct iwl_link_quality_cmd));
590 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
591 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
593 spin_lock_irqsave(&priv->sta_lock, flags_spin);
594 IWL_ERR(priv, "Adding station %pM failed.\n",
595 priv->stations[i].sta.sta.addr);
596 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
597 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
598 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
601 * Rate scaling has already been initialized, send
605 iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true);
606 spin_lock_irqsave(&priv->sta_lock, flags_spin);
607 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
611 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
613 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
615 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
618 void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
621 int sta_id = ctx->ap_sta_id;
623 struct iwl_addsta_cmd sta_cmd;
624 struct iwl_link_quality_cmd lq;
627 spin_lock_irqsave(&priv->sta_lock, flags);
628 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
629 spin_unlock_irqrestore(&priv->sta_lock, flags);
633 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
635 memcpy(&lq, priv->stations[sta_id].lq, sizeof(lq));
637 active = priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE;
638 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
639 spin_unlock_irqrestore(&priv->sta_lock, flags);
642 ret = iwl_send_remove_station(
643 priv, priv->stations[sta_id].sta.sta.addr,
646 IWL_ERR(priv, "failed to remove STA %pM (%d)\n",
647 priv->stations[sta_id].sta.sta.addr, ret);
649 spin_lock_irqsave(&priv->sta_lock, flags);
650 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
651 spin_unlock_irqrestore(&priv->sta_lock, flags);
653 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
655 IWL_ERR(priv, "failed to re-add STA %pM (%d)\n",
656 priv->stations[sta_id].sta.sta.addr, ret);
657 iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true);
660 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
664 for (i = 0; i < priv->sta_key_max_num; i++)
665 if (!test_and_set_bit(i, &priv->ucode_key_table))
668 return WEP_INVALID_OFFSET;
671 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
676 spin_lock_irqsave(&priv->sta_lock, flags);
677 for (i = 0; i < priv->hw_params.max_stations; i++) {
678 if (!(priv->stations[i].used & IWL_STA_BCAST))
681 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
682 priv->num_stations--;
683 if (WARN_ON(priv->num_stations < 0))
684 priv->num_stations = 0;
685 kfree(priv->stations[i].lq);
686 priv->stations[i].lq = NULL;
688 spin_unlock_irqrestore(&priv->sta_lock, flags);
691 #ifdef CONFIG_IWLWIFI_DEBUG
692 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
693 struct iwl_link_quality_cmd *lq)
696 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
697 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
698 lq->general_params.single_stream_ant_msk,
699 lq->general_params.dual_stream_ant_msk);
701 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
702 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
703 i, lq->rs_table[i].rate_n_flags);
706 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
707 struct iwl_link_quality_cmd *lq)
713 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
715 * It sometimes happens when a HT rate has been in use and we
716 * loose connectivity with AP then mac80211 will first tell us that the
717 * current channel is not HT anymore before removing the station. In such a
718 * scenario the RXON flags will be updated to indicate we are not
719 * communicating HT anymore, but the LQ command may still contain HT rates.
720 * Test for this to prevent driver from sending LQ command between the time
721 * RXON flags are updated and when LQ command is updated.
723 static bool is_lq_table_valid(struct iwl_priv *priv,
724 struct iwl_rxon_context *ctx,
725 struct iwl_link_quality_cmd *lq)
732 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
733 ctx->active.channel);
734 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
735 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
737 "index %d of LQ expects HT channel\n",
746 * iwl_send_lq_cmd() - Send link quality command
747 * @init: This command is sent as part of station initialization right
748 * after station has been added.
750 * The link quality command is sent as the last step of station creation.
751 * This is the special case in which init is set and we call a callback in
752 * this case to clear the state indicating that station creation is in
755 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
756 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
759 unsigned long flags_spin;
761 struct iwl_host_cmd cmd = {
762 .id = REPLY_TX_LINK_QUALITY_CMD,
763 .len = { sizeof(struct iwl_link_quality_cmd), },
768 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
772 spin_lock_irqsave(&priv->sta_lock, flags_spin);
773 if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
774 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
777 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
779 iwl_dump_lq_cmd(priv, lq);
780 if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
783 if (is_lq_table_valid(priv, ctx, lq))
784 ret = iwl_send_cmd(priv, &cmd);
788 if (cmd.flags & CMD_ASYNC)
792 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
794 spin_lock_irqsave(&priv->sta_lock, flags_spin);
795 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
796 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
801 int iwl_mac_sta_remove(struct ieee80211_hw *hw,
802 struct ieee80211_vif *vif,
803 struct ieee80211_sta *sta)
805 struct iwl_priv *priv = hw->priv;
806 struct iwl_station_priv_common *sta_common = (void *)sta->drv_priv;
809 IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
811 mutex_lock(&priv->mutex);
812 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
814 ret = iwl_remove_station(priv, sta_common->sta_id, sta->addr);
816 IWL_ERR(priv, "Error removing station %pM\n",
818 mutex_unlock(&priv->mutex);