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
);
172 EXPORT_SYMBOL(iwl_send_add_sta
);
174 static void iwl_set_ht_add_station(struct iwl_priv
*priv
, u8 index
,
175 struct ieee80211_sta
*sta
,
176 struct iwl_rxon_context
*ctx
)
178 struct ieee80211_sta_ht_cap
*sta_ht_inf
= &sta
->ht_cap
;
182 if (!sta
|| !sta_ht_inf
->ht_supported
)
185 mimo_ps_mode
= (sta_ht_inf
->cap
& IEEE80211_HT_CAP_SM_PS
) >> 2;
186 IWL_DEBUG_ASSOC(priv
, "spatial multiplexing power save mode: %s\n",
187 (mimo_ps_mode
== WLAN_HT_CAP_SM_PS_STATIC
) ?
189 (mimo_ps_mode
== WLAN_HT_CAP_SM_PS_DYNAMIC
) ?
190 "dynamic" : "disabled");
192 sta_flags
= priv
->stations
[index
].sta
.station_flags
;
194 sta_flags
&= ~(STA_FLG_RTS_MIMO_PROT_MSK
| STA_FLG_MIMO_DIS_MSK
);
196 switch (mimo_ps_mode
) {
197 case WLAN_HT_CAP_SM_PS_STATIC
:
198 sta_flags
|= STA_FLG_MIMO_DIS_MSK
;
200 case WLAN_HT_CAP_SM_PS_DYNAMIC
:
201 sta_flags
|= STA_FLG_RTS_MIMO_PROT_MSK
;
203 case WLAN_HT_CAP_SM_PS_DISABLED
:
206 IWL_WARN(priv
, "Invalid MIMO PS mode %d\n", mimo_ps_mode
);
210 sta_flags
|= cpu_to_le32(
211 (u32
)sta_ht_inf
->ampdu_factor
<< STA_FLG_MAX_AGG_SIZE_POS
);
213 sta_flags
|= cpu_to_le32(
214 (u32
)sta_ht_inf
->ampdu_density
<< STA_FLG_AGG_MPDU_DENSITY_POS
);
216 if (iwl_is_ht40_tx_allowed(priv
, ctx
, &sta
->ht_cap
))
217 sta_flags
|= STA_FLG_HT40_EN_MSK
;
219 sta_flags
&= ~STA_FLG_HT40_EN_MSK
;
221 priv
->stations
[index
].sta
.station_flags
= sta_flags
;
227 * iwl_prep_station - Prepare station information for addition
229 * should be called with sta_lock held
231 u8
iwl_prep_station(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
,
232 const u8
*addr
, bool is_ap
, struct ieee80211_sta
*sta
)
234 struct iwl_station_entry
*station
;
236 u8 sta_id
= IWL_INVALID_STATION
;
240 sta_id
= ctx
->ap_sta_id
;
241 else if (is_broadcast_ether_addr(addr
))
242 sta_id
= ctx
->bcast_sta_id
;
244 for (i
= IWL_STA_ID
; i
< priv
->hw_params
.max_stations
; i
++) {
245 if (!compare_ether_addr(priv
->stations
[i
].sta
.sta
.addr
,
251 if (!priv
->stations
[i
].used
&&
252 sta_id
== IWL_INVALID_STATION
)
257 * These two conditions have the same outcome, but keep them
260 if (unlikely(sta_id
== IWL_INVALID_STATION
))
264 * uCode is not able to deal with multiple requests to add a
265 * station. Keep track if one is in progress so that we do not send
268 if (priv
->stations
[sta_id
].used
& IWL_STA_UCODE_INPROGRESS
) {
269 IWL_DEBUG_INFO(priv
, "STA %d already in process of being added.\n",
274 if ((priv
->stations
[sta_id
].used
& IWL_STA_DRIVER_ACTIVE
) &&
275 (priv
->stations
[sta_id
].used
& IWL_STA_UCODE_ACTIVE
) &&
276 !compare_ether_addr(priv
->stations
[sta_id
].sta
.sta
.addr
, addr
)) {
277 IWL_DEBUG_ASSOC(priv
, "STA %d (%pM) already added, not adding again.\n",
282 station
= &priv
->stations
[sta_id
];
283 station
->used
= IWL_STA_DRIVER_ACTIVE
;
284 IWL_DEBUG_ASSOC(priv
, "Add STA to driver ID %d: %pM\n",
286 priv
->num_stations
++;
288 /* Set up the REPLY_ADD_STA command to send to device */
289 memset(&station
->sta
, 0, sizeof(struct iwl_addsta_cmd
));
290 memcpy(station
->sta
.sta
.addr
, addr
, ETH_ALEN
);
291 station
->sta
.mode
= 0;
292 station
->sta
.sta
.sta_id
= sta_id
;
293 station
->sta
.station_flags
= ctx
->station_flags
;
294 station
->ctxid
= ctx
->ctxid
;
297 struct iwl_station_priv_common
*sta_priv
;
299 sta_priv
= (void *)sta
->drv_priv
;
304 * OK to call unconditionally, since local stations (IBSS BSSID
305 * STA and broadcast STA) pass in a NULL sta, and mac80211
306 * doesn't allow HT IBSS.
308 iwl_set_ht_add_station(priv
, sta_id
, sta
, ctx
);
311 rate
= (priv
->band
== IEEE80211_BAND_5GHZ
) ?
312 IWL_RATE_6M_PLCP
: IWL_RATE_1M_PLCP
;
313 /* Turn on both antennas for the station... */
314 station
->sta
.rate_n_flags
= cpu_to_le16(rate
| RATE_MCS_ANT_AB_MSK
);
319 EXPORT_SYMBOL_GPL(iwl_prep_station
);
321 #define STA_WAIT_TIMEOUT (HZ/2)
324 * iwl_add_station_common -
326 int iwl_add_station_common(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
,
327 const u8
*addr
, bool is_ap
,
328 struct ieee80211_sta
*sta
, u8
*sta_id_r
)
330 unsigned long flags_spin
;
333 struct iwl_addsta_cmd sta_cmd
;
336 spin_lock_irqsave(&priv
->sta_lock
, flags_spin
);
337 sta_id
= iwl_prep_station(priv
, ctx
, addr
, is_ap
, sta
);
338 if (sta_id
== IWL_INVALID_STATION
) {
339 IWL_ERR(priv
, "Unable to prepare station %pM for addition\n",
341 spin_unlock_irqrestore(&priv
->sta_lock
, flags_spin
);
346 * uCode is not able to deal with multiple requests to add a
347 * station. Keep track if one is in progress so that we do not send
350 if (priv
->stations
[sta_id
].used
& IWL_STA_UCODE_INPROGRESS
) {
351 IWL_DEBUG_INFO(priv
, "STA %d already in process of being added.\n",
353 spin_unlock_irqrestore(&priv
->sta_lock
, flags_spin
);
357 if ((priv
->stations
[sta_id
].used
& IWL_STA_DRIVER_ACTIVE
) &&
358 (priv
->stations
[sta_id
].used
& IWL_STA_UCODE_ACTIVE
)) {
359 IWL_DEBUG_ASSOC(priv
, "STA %d (%pM) already added, not adding again.\n",
361 spin_unlock_irqrestore(&priv
->sta_lock
, flags_spin
);
365 priv
->stations
[sta_id
].used
|= IWL_STA_UCODE_INPROGRESS
;
366 memcpy(&sta_cmd
, &priv
->stations
[sta_id
].sta
, sizeof(struct iwl_addsta_cmd
));
367 spin_unlock_irqrestore(&priv
->sta_lock
, flags_spin
);
369 /* Add station to device's station table */
370 ret
= iwl_send_add_sta(priv
, &sta_cmd
, CMD_SYNC
);
372 spin_lock_irqsave(&priv
->sta_lock
, flags_spin
);
373 IWL_ERR(priv
, "Adding station %pM failed.\n",
374 priv
->stations
[sta_id
].sta
.sta
.addr
);
375 priv
->stations
[sta_id
].used
&= ~IWL_STA_DRIVER_ACTIVE
;
376 priv
->stations
[sta_id
].used
&= ~IWL_STA_UCODE_INPROGRESS
;
377 spin_unlock_irqrestore(&priv
->sta_lock
, flags_spin
);
382 EXPORT_SYMBOL(iwl_add_station_common
);
385 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
387 * priv->sta_lock must be held
389 static void iwl_sta_ucode_deactivate(struct iwl_priv
*priv
, u8 sta_id
)
391 /* Ucode must be active and driver must be non active */
392 if ((priv
->stations
[sta_id
].used
&
393 (IWL_STA_UCODE_ACTIVE
| IWL_STA_DRIVER_ACTIVE
)) != IWL_STA_UCODE_ACTIVE
)
394 IWL_ERR(priv
, "removed non active STA %u\n", sta_id
);
396 priv
->stations
[sta_id
].used
&= ~IWL_STA_UCODE_ACTIVE
;
398 memset(&priv
->stations
[sta_id
], 0, sizeof(struct iwl_station_entry
));
399 IWL_DEBUG_ASSOC(priv
, "Removed STA %u\n", sta_id
);
402 static int iwl_send_remove_station(struct iwl_priv
*priv
,
403 const u8
*addr
, int sta_id
)
405 struct iwl_rx_packet
*pkt
;
408 unsigned long flags_spin
;
409 struct iwl_rem_sta_cmd rm_sta_cmd
;
411 struct iwl_host_cmd cmd
= {
412 .id
= REPLY_REMOVE_STA
,
413 .len
= sizeof(struct iwl_rem_sta_cmd
),
418 memset(&rm_sta_cmd
, 0, sizeof(rm_sta_cmd
));
419 rm_sta_cmd
.num_sta
= 1;
420 memcpy(&rm_sta_cmd
.addr
, addr
, ETH_ALEN
);
422 cmd
.flags
|= CMD_WANT_SKB
;
424 ret
= iwl_send_cmd(priv
, &cmd
);
429 pkt
= (struct iwl_rx_packet
*)cmd
.reply_page
;
430 if (pkt
->hdr
.flags
& IWL_CMD_FAILED_MSK
) {
431 IWL_ERR(priv
, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
437 switch (pkt
->u
.rem_sta
.status
) {
438 case REM_STA_SUCCESS_MSK
:
439 spin_lock_irqsave(&priv
->sta_lock
, flags_spin
);
440 iwl_sta_ucode_deactivate(priv
, sta_id
);
441 spin_unlock_irqrestore(&priv
->sta_lock
, flags_spin
);
442 IWL_DEBUG_ASSOC(priv
, "REPLY_REMOVE_STA PASSED\n");
446 IWL_ERR(priv
, "REPLY_REMOVE_STA failed\n");
450 iwl_free_pages(priv
, cmd
.reply_page
);
456 * iwl_remove_station - Remove driver's knowledge of station.
458 int iwl_remove_station(struct iwl_priv
*priv
, const u8 sta_id
,
463 if (!iwl_is_ready(priv
)) {
465 "Unable to remove station %pM, device not ready.\n",
468 * It is typical for stations to be removed when we are
469 * going down. Return success since device will be down
475 IWL_DEBUG_ASSOC(priv
, "Removing STA from driver:%d %pM\n",
478 if (WARN_ON(sta_id
== IWL_INVALID_STATION
))
481 spin_lock_irqsave(&priv
->sta_lock
, flags
);
483 if (!(priv
->stations
[sta_id
].used
& IWL_STA_DRIVER_ACTIVE
)) {
484 IWL_DEBUG_INFO(priv
, "Removing %pM but non DRIVER active\n",
489 if (!(priv
->stations
[sta_id
].used
& IWL_STA_UCODE_ACTIVE
)) {
490 IWL_DEBUG_INFO(priv
, "Removing %pM but non UCODE active\n",
495 if (priv
->stations
[sta_id
].used
& IWL_STA_LOCAL
) {
496 kfree(priv
->stations
[sta_id
].lq
);
497 priv
->stations
[sta_id
].lq
= NULL
;
500 priv
->stations
[sta_id
].used
&= ~IWL_STA_DRIVER_ACTIVE
;
502 priv
->num_stations
--;
504 BUG_ON(priv
->num_stations
< 0);
506 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
508 return iwl_send_remove_station(priv
, addr
, sta_id
);
510 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
513 EXPORT_SYMBOL_GPL(iwl_remove_station
);
516 * iwl_clear_ucode_stations - clear ucode station table bits
518 * This function clears all the bits in the driver indicating
519 * which stations are active in the ucode. Call when something
520 * other than explicit station management would cause this in
521 * the ucode, e.g. unassociated RXON.
523 void iwl_clear_ucode_stations(struct iwl_priv
*priv
,
524 struct iwl_rxon_context
*ctx
)
527 unsigned long flags_spin
;
528 bool cleared
= false;
530 IWL_DEBUG_INFO(priv
, "Clearing ucode stations in driver\n");
532 spin_lock_irqsave(&priv
->sta_lock
, flags_spin
);
533 for (i
= 0; i
< priv
->hw_params
.max_stations
; i
++) {
534 if (ctx
&& ctx
->ctxid
!= priv
->stations
[i
].ctxid
)
537 if (priv
->stations
[i
].used
& IWL_STA_UCODE_ACTIVE
) {
538 IWL_DEBUG_INFO(priv
, "Clearing ucode active for station %d\n", i
);
539 priv
->stations
[i
].used
&= ~IWL_STA_UCODE_ACTIVE
;
543 spin_unlock_irqrestore(&priv
->sta_lock
, flags_spin
);
546 IWL_DEBUG_INFO(priv
, "No active stations found to be cleared\n");
548 EXPORT_SYMBOL(iwl_clear_ucode_stations
);
551 * iwl_restore_stations() - Restore driver known stations to device
553 * All stations considered active by driver, but not present in ucode, is
558 void iwl_restore_stations(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
)
560 struct iwl_addsta_cmd sta_cmd
;
561 struct iwl_link_quality_cmd lq
;
562 unsigned long flags_spin
;
568 if (!iwl_is_ready(priv
)) {
569 IWL_DEBUG_INFO(priv
, "Not ready yet, not restoring any stations.\n");
573 IWL_DEBUG_ASSOC(priv
, "Restoring all known stations ... start.\n");
574 spin_lock_irqsave(&priv
->sta_lock
, flags_spin
);
575 for (i
= 0; i
< priv
->hw_params
.max_stations
; i
++) {
576 if (ctx
->ctxid
!= priv
->stations
[i
].ctxid
)
578 if ((priv
->stations
[i
].used
& IWL_STA_DRIVER_ACTIVE
) &&
579 !(priv
->stations
[i
].used
& IWL_STA_UCODE_ACTIVE
)) {
580 IWL_DEBUG_ASSOC(priv
, "Restoring sta %pM\n",
581 priv
->stations
[i
].sta
.sta
.addr
);
582 priv
->stations
[i
].sta
.mode
= 0;
583 priv
->stations
[i
].used
|= IWL_STA_UCODE_INPROGRESS
;
588 for (i
= 0; i
< priv
->hw_params
.max_stations
; i
++) {
589 if ((priv
->stations
[i
].used
& IWL_STA_UCODE_INPROGRESS
)) {
590 memcpy(&sta_cmd
, &priv
->stations
[i
].sta
,
591 sizeof(struct iwl_addsta_cmd
));
593 if (priv
->stations
[i
].lq
) {
594 memcpy(&lq
, priv
->stations
[i
].lq
,
595 sizeof(struct iwl_link_quality_cmd
));
598 spin_unlock_irqrestore(&priv
->sta_lock
, flags_spin
);
599 ret
= iwl_send_add_sta(priv
, &sta_cmd
, CMD_SYNC
);
601 spin_lock_irqsave(&priv
->sta_lock
, flags_spin
);
602 IWL_ERR(priv
, "Adding station %pM failed.\n",
603 priv
->stations
[i
].sta
.sta
.addr
);
604 priv
->stations
[i
].used
&= ~IWL_STA_DRIVER_ACTIVE
;
605 priv
->stations
[i
].used
&= ~IWL_STA_UCODE_INPROGRESS
;
606 spin_unlock_irqrestore(&priv
->sta_lock
, flags_spin
);
609 * Rate scaling has already been initialized, send
613 iwl_send_lq_cmd(priv
, ctx
, &lq
, CMD_SYNC
, true);
614 spin_lock_irqsave(&priv
->sta_lock
, flags_spin
);
615 priv
->stations
[i
].used
&= ~IWL_STA_UCODE_INPROGRESS
;
619 spin_unlock_irqrestore(&priv
->sta_lock
, flags_spin
);
621 IWL_DEBUG_INFO(priv
, "Restoring all known stations .... no stations to be restored.\n");
623 IWL_DEBUG_INFO(priv
, "Restoring all known stations .... complete.\n");
625 EXPORT_SYMBOL(iwl_restore_stations
);
627 int iwl_get_free_ucode_key_index(struct iwl_priv
*priv
)
631 for (i
= 0; i
< priv
->sta_key_max_num
; i
++)
632 if (!test_and_set_bit(i
, &priv
->ucode_key_table
))
635 return WEP_INVALID_OFFSET
;
637 EXPORT_SYMBOL(iwl_get_free_ucode_key_index
);
639 void iwl_dealloc_bcast_stations(struct iwl_priv
*priv
)
644 spin_lock_irqsave(&priv
->sta_lock
, flags
);
645 for (i
= 0; i
< priv
->hw_params
.max_stations
; i
++) {
646 if (!(priv
->stations
[i
].used
& IWL_STA_BCAST
))
649 priv
->stations
[i
].used
&= ~IWL_STA_UCODE_ACTIVE
;
650 priv
->num_stations
--;
651 BUG_ON(priv
->num_stations
< 0);
652 kfree(priv
->stations
[i
].lq
);
653 priv
->stations
[i
].lq
= NULL
;
655 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
657 EXPORT_SYMBOL_GPL(iwl_dealloc_bcast_stations
);
659 #ifdef CONFIG_IWLWIFI_DEBUG
660 static void iwl_dump_lq_cmd(struct iwl_priv
*priv
,
661 struct iwl_link_quality_cmd
*lq
)
664 IWL_DEBUG_RATE(priv
, "lq station id 0x%x\n", lq
->sta_id
);
665 IWL_DEBUG_RATE(priv
, "lq ant 0x%X 0x%X\n",
666 lq
->general_params
.single_stream_ant_msk
,
667 lq
->general_params
.dual_stream_ant_msk
);
669 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++)
670 IWL_DEBUG_RATE(priv
, "lq index %d 0x%X\n",
671 i
, lq
->rs_table
[i
].rate_n_flags
);
674 static inline void iwl_dump_lq_cmd(struct iwl_priv
*priv
,
675 struct iwl_link_quality_cmd
*lq
)
681 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
683 * It sometimes happens when a HT rate has been in use and we
684 * loose connectivity with AP then mac80211 will first tell us that the
685 * current channel is not HT anymore before removing the station. In such a
686 * scenario the RXON flags will be updated to indicate we are not
687 * communicating HT anymore, but the LQ command may still contain HT rates.
688 * Test for this to prevent driver from sending LQ command between the time
689 * RXON flags are updated and when LQ command is updated.
691 static bool is_lq_table_valid(struct iwl_priv
*priv
,
692 struct iwl_rxon_context
*ctx
,
693 struct iwl_link_quality_cmd
*lq
)
700 IWL_DEBUG_INFO(priv
, "Channel %u is not an HT channel\n",
701 ctx
->active
.channel
);
702 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++) {
703 if (le32_to_cpu(lq
->rs_table
[i
].rate_n_flags
) & RATE_MCS_HT_MSK
) {
705 "index %d of LQ expects HT channel\n",
714 * iwl_send_lq_cmd() - Send link quality command
715 * @init: This command is sent as part of station initialization right
716 * after station has been added.
718 * The link quality command is sent as the last step of station creation.
719 * This is the special case in which init is set and we call a callback in
720 * this case to clear the state indicating that station creation is in
723 int iwl_send_lq_cmd(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
,
724 struct iwl_link_quality_cmd
*lq
, u8 flags
, bool init
)
727 unsigned long flags_spin
;
729 struct iwl_host_cmd cmd
= {
730 .id
= REPLY_TX_LINK_QUALITY_CMD
,
731 .len
= sizeof(struct iwl_link_quality_cmd
),
736 if (WARN_ON(lq
->sta_id
== IWL_INVALID_STATION
))
739 iwl_dump_lq_cmd(priv
, lq
);
740 BUG_ON(init
&& (cmd
.flags
& CMD_ASYNC
));
742 if (is_lq_table_valid(priv
, ctx
, lq
))
743 ret
= iwl_send_cmd(priv
, &cmd
);
747 if (cmd
.flags
& CMD_ASYNC
)
751 IWL_DEBUG_INFO(priv
, "init LQ command complete, clearing sta addition status for sta %d\n",
753 spin_lock_irqsave(&priv
->sta_lock
, flags_spin
);
754 priv
->stations
[lq
->sta_id
].used
&= ~IWL_STA_UCODE_INPROGRESS
;
755 spin_unlock_irqrestore(&priv
->sta_lock
, flags_spin
);
759 EXPORT_SYMBOL(iwl_send_lq_cmd
);
761 int iwl_mac_sta_remove(struct ieee80211_hw
*hw
,
762 struct ieee80211_vif
*vif
,
763 struct ieee80211_sta
*sta
)
765 struct iwl_priv
*priv
= hw
->priv
;
766 struct iwl_station_priv_common
*sta_common
= (void *)sta
->drv_priv
;
769 IWL_DEBUG_INFO(priv
, "received request to remove station %pM\n",
771 mutex_lock(&priv
->mutex
);
772 IWL_DEBUG_INFO(priv
, "proceeding to remove station %pM\n",
774 ret
= iwl_remove_station(priv
, sta_common
->sta_id
, sta
->addr
);
776 IWL_ERR(priv
, "Error removing station %pM\n",
778 mutex_unlock(&priv
->mutex
);
781 EXPORT_SYMBOL(iwl_mac_sta_remove
);