1 /******************************************************************************
3 * Copyright(c) 2003 - 2010 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 = 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;
239 sta_id = ctx->ap_sta_id;
240 else if (is_broadcast_ether_addr(addr))
241 sta_id = ctx->bcast_sta_id;
243 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
244 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
250 if (!priv->stations[i].used &&
251 sta_id == IWL_INVALID_STATION)
256 * These two conditions have the same outcome, but keep them
259 if (unlikely(sta_id == IWL_INVALID_STATION))
263 * uCode is not able to deal with multiple requests to add a
264 * station. Keep track if one is in progress so that we do not send
267 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
268 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
273 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
274 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
275 !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
276 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
281 station = &priv->stations[sta_id];
282 station->used = IWL_STA_DRIVER_ACTIVE;
283 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
285 priv->num_stations++;
287 /* Set up the REPLY_ADD_STA command to send to device */
288 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
289 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
290 station->sta.mode = 0;
291 station->sta.sta.sta_id = sta_id;
292 station->sta.station_flags = ctx->station_flags;
293 station->ctxid = ctx->ctxid;
296 struct iwl_station_priv_common *sta_priv;
298 sta_priv = (void *)sta->drv_priv;
303 * OK to call unconditionally, since local stations (IBSS BSSID
304 * STA and broadcast STA) pass in a NULL sta, and mac80211
305 * doesn't allow HT IBSS.
307 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
313 #define STA_WAIT_TIMEOUT (HZ/2)
316 * iwl_add_station_common -
318 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
319 const u8 *addr, bool is_ap,
320 struct ieee80211_sta *sta, u8 *sta_id_r)
322 unsigned long flags_spin;
325 struct iwl_addsta_cmd sta_cmd;
328 spin_lock_irqsave(&priv->sta_lock, flags_spin);
329 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
330 if (sta_id == IWL_INVALID_STATION) {
331 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
333 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
338 * uCode is not able to deal with multiple requests to add a
339 * station. Keep track if one is in progress so that we do not send
342 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
343 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
345 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
349 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
350 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
351 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
353 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
357 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
358 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
359 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
361 /* Add station to device's station table */
362 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
364 spin_lock_irqsave(&priv->sta_lock, flags_spin);
365 IWL_ERR(priv, "Adding station %pM failed.\n",
366 priv->stations[sta_id].sta.sta.addr);
367 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
368 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
369 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
376 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
378 * priv->sta_lock must be held
380 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
382 /* Ucode must be active and driver must be non active */
383 if ((priv->stations[sta_id].used &
384 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE)
385 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
387 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
389 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
390 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
393 static int iwl_send_remove_station(struct iwl_priv *priv,
394 const u8 *addr, int sta_id,
397 struct iwl_rx_packet *pkt;
400 unsigned long flags_spin;
401 struct iwl_rem_sta_cmd rm_sta_cmd;
403 struct iwl_host_cmd cmd = {
404 .id = REPLY_REMOVE_STA,
405 .len = sizeof(struct iwl_rem_sta_cmd),
410 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
411 rm_sta_cmd.num_sta = 1;
412 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
414 cmd.flags |= CMD_WANT_SKB;
416 ret = iwl_send_cmd(priv, &cmd);
421 pkt = (struct iwl_rx_packet *)cmd.reply_page;
422 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
423 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
429 switch (pkt->u.rem_sta.status) {
430 case REM_STA_SUCCESS_MSK:
432 spin_lock_irqsave(&priv->sta_lock, flags_spin);
433 iwl_sta_ucode_deactivate(priv, sta_id);
434 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
436 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
440 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
444 iwl_free_pages(priv, cmd.reply_page);
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_irqsave(&priv->sta_lock, flags);
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 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
496 priv->num_stations--;
498 BUG_ON(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 BUG_ON(priv->num_stations < 0);
684 kfree(priv->stations[i].lq);
685 priv->stations[i].lq = NULL;
687 spin_unlock_irqrestore(&priv->sta_lock, flags);
690 #ifdef CONFIG_IWLWIFI_DEBUG
691 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
692 struct iwl_link_quality_cmd *lq)
695 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
696 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
697 lq->general_params.single_stream_ant_msk,
698 lq->general_params.dual_stream_ant_msk);
700 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
701 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
702 i, lq->rs_table[i].rate_n_flags);
705 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
706 struct iwl_link_quality_cmd *lq)
712 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
714 * It sometimes happens when a HT rate has been in use and we
715 * loose connectivity with AP then mac80211 will first tell us that the
716 * current channel is not HT anymore before removing the station. In such a
717 * scenario the RXON flags will be updated to indicate we are not
718 * communicating HT anymore, but the LQ command may still contain HT rates.
719 * Test for this to prevent driver from sending LQ command between the time
720 * RXON flags are updated and when LQ command is updated.
722 static bool is_lq_table_valid(struct iwl_priv *priv,
723 struct iwl_rxon_context *ctx,
724 struct iwl_link_quality_cmd *lq)
731 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
732 ctx->active.channel);
733 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
734 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
736 "index %d of LQ expects HT channel\n",
745 * iwl_send_lq_cmd() - Send link quality command
746 * @init: This command is sent as part of station initialization right
747 * after station has been added.
749 * The link quality command is sent as the last step of station creation.
750 * This is the special case in which init is set and we call a callback in
751 * this case to clear the state indicating that station creation is in
754 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
755 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
758 unsigned long flags_spin;
760 struct iwl_host_cmd cmd = {
761 .id = REPLY_TX_LINK_QUALITY_CMD,
762 .len = sizeof(struct iwl_link_quality_cmd),
767 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
771 spin_lock_irqsave(&priv->sta_lock, flags_spin);
772 if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
773 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
776 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
778 iwl_dump_lq_cmd(priv, lq);
779 BUG_ON(init && (cmd.flags & CMD_ASYNC));
781 if (is_lq_table_valid(priv, ctx, lq))
782 ret = iwl_send_cmd(priv, &cmd);
786 if (cmd.flags & CMD_ASYNC)
790 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
792 spin_lock_irqsave(&priv->sta_lock, flags_spin);
793 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
794 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
799 int iwl_mac_sta_remove(struct ieee80211_hw *hw,
800 struct ieee80211_vif *vif,
801 struct ieee80211_sta *sta)
803 struct iwl_priv *priv = hw->priv;
804 struct iwl_station_priv_common *sta_common = (void *)sta->drv_priv;
807 IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
809 mutex_lock(&priv->mutex);
810 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
812 ret = iwl_remove_station(priv, sta_common->sta_id, sta->addr);
814 IWL_ERR(priv, "Error removing station %pM\n",
816 mutex_unlock(&priv->mutex);