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>
38 #include "iwl-trans.h"
41 /* priv->shrd->sta_lock must be held */
42 static void iwl_sta_ucode_activate(struct iwl_priv
*priv
, u8 sta_id
)
45 if (!(priv
->stations
[sta_id
].used
& IWL_STA_DRIVER_ACTIVE
))
46 IWL_ERR(priv
, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
47 sta_id
, priv
->stations
[sta_id
].sta
.sta
.addr
);
49 if (priv
->stations
[sta_id
].used
& IWL_STA_UCODE_ACTIVE
) {
51 "STA id %u addr %pM already present in uCode (according to driver)\n",
52 sta_id
, priv
->stations
[sta_id
].sta
.sta
.addr
);
54 priv
->stations
[sta_id
].used
|= IWL_STA_UCODE_ACTIVE
;
55 IWL_DEBUG_ASSOC(priv
, "Added STA id %u addr %pM to uCode\n",
56 sta_id
, priv
->stations
[sta_id
].sta
.sta
.addr
);
60 static int iwl_process_add_sta_resp(struct iwl_priv
*priv
,
61 struct iwl_addsta_cmd
*addsta
,
62 struct iwl_rx_packet
*pkt
)
64 u8 sta_id
= addsta
->sta
.sta_id
;
68 if (pkt
->hdr
.flags
& IWL_CMD_FAILED_MSK
) {
69 IWL_ERR(priv
, "Bad return from REPLY_ADD_STA (0x%08X)\n",
74 IWL_DEBUG_INFO(priv
, "Processing response for adding station %u\n",
77 spin_lock_irqsave(&priv
->shrd
->sta_lock
, flags
);
79 switch (pkt
->u
.add_sta
.status
) {
80 case ADD_STA_SUCCESS_MSK
:
81 IWL_DEBUG_INFO(priv
, "REPLY_ADD_STA PASSED\n");
82 iwl_sta_ucode_activate(priv
, sta_id
);
85 case ADD_STA_NO_ROOM_IN_TABLE
:
86 IWL_ERR(priv
, "Adding station %d failed, no room in table.\n",
89 case ADD_STA_NO_BLOCK_ACK_RESOURCE
:
90 IWL_ERR(priv
, "Adding station %d failed, no block ack resource.\n",
93 case ADD_STA_MODIFY_NON_EXIST_STA
:
94 IWL_ERR(priv
, "Attempting to modify non-existing station %d\n",
98 IWL_DEBUG_ASSOC(priv
, "Received REPLY_ADD_STA:(0x%08X)\n",
99 pkt
->u
.add_sta
.status
);
103 IWL_DEBUG_INFO(priv
, "%s station id %u addr %pM\n",
104 priv
->stations
[sta_id
].sta
.mode
==
105 STA_CONTROL_MODIFY_MSK
? "Modified" : "Added",
106 sta_id
, priv
->stations
[sta_id
].sta
.sta
.addr
);
109 * XXX: The MAC address in the command buffer is often changed from
110 * the original sent to the device. That is, the MAC address
111 * written to the command buffer often is not the same MAC address
112 * read from the command buffer when the command returns. This
113 * issue has not yet been resolved and this debugging is left to
114 * observe the problem.
116 IWL_DEBUG_INFO(priv
, "%s station according to cmd buffer %pM\n",
117 priv
->stations
[sta_id
].sta
.mode
==
118 STA_CONTROL_MODIFY_MSK
? "Modified" : "Added",
120 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
, flags
);
125 int iwl_add_sta_callback(struct iwl_priv
*priv
, struct iwl_rx_mem_buffer
*rxb
,
126 struct iwl_device_cmd
*cmd
)
128 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
129 struct iwl_addsta_cmd
*addsta
=
130 (struct iwl_addsta_cmd
*) cmd
->payload
;
132 return iwl_process_add_sta_resp(priv
, addsta
, pkt
);
135 static u16
iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd
*cmd
, u8
*data
)
137 u16 size
= (u16
)sizeof(struct iwl_addsta_cmd
);
138 struct iwl_addsta_cmd
*addsta
= (struct iwl_addsta_cmd
*)data
;
139 memcpy(addsta
, cmd
, size
);
140 /* resrved in 5000 */
141 addsta
->rate_n_flags
= cpu_to_le16(0);
145 int iwl_send_add_sta(struct iwl_priv
*priv
,
146 struct iwl_addsta_cmd
*sta
, u8 flags
)
149 u8 data
[sizeof(*sta
)];
150 struct iwl_host_cmd cmd
= {
155 u8 sta_id __maybe_unused
= sta
->sta
.sta_id
;
157 IWL_DEBUG_INFO(priv
, "Adding sta %u (%pM) %ssynchronously\n",
158 sta_id
, sta
->sta
.addr
, flags
& CMD_ASYNC
? "a" : "");
160 if (!(flags
& CMD_ASYNC
)) {
161 cmd
.flags
|= CMD_WANT_SKB
;
165 cmd
.len
[0] = iwlagn_build_addsta_hcmd(sta
, data
);
166 ret
= iwl_trans_send_cmd(trans(priv
), &cmd
);
168 if (ret
|| (flags
& CMD_ASYNC
))
170 /*else the command was successfully sent in SYNC mode, need to free
173 iwl_free_pages(priv
->shrd
, cmd
.reply_page
);
175 if (cmd
.handler_status
)
176 IWL_ERR(priv
, "%s - error in the CMD response %d", __func__
,
179 return cmd
.handler_status
;
182 static void iwl_set_ht_add_station(struct iwl_priv
*priv
, u8 index
,
183 struct ieee80211_sta
*sta
,
184 struct iwl_rxon_context
*ctx
)
186 struct ieee80211_sta_ht_cap
*sta_ht_inf
= &sta
->ht_cap
;
190 if (!sta
|| !sta_ht_inf
->ht_supported
)
193 mimo_ps_mode
= (sta_ht_inf
->cap
& IEEE80211_HT_CAP_SM_PS
) >> 2;
194 IWL_DEBUG_ASSOC(priv
, "spatial multiplexing power save mode: %s\n",
195 (mimo_ps_mode
== WLAN_HT_CAP_SM_PS_STATIC
) ?
197 (mimo_ps_mode
== WLAN_HT_CAP_SM_PS_DYNAMIC
) ?
198 "dynamic" : "disabled");
200 sta_flags
= priv
->stations
[index
].sta
.station_flags
;
202 sta_flags
&= ~(STA_FLG_RTS_MIMO_PROT_MSK
| STA_FLG_MIMO_DIS_MSK
);
204 switch (mimo_ps_mode
) {
205 case WLAN_HT_CAP_SM_PS_STATIC
:
206 sta_flags
|= STA_FLG_MIMO_DIS_MSK
;
208 case WLAN_HT_CAP_SM_PS_DYNAMIC
:
209 sta_flags
|= STA_FLG_RTS_MIMO_PROT_MSK
;
211 case WLAN_HT_CAP_SM_PS_DISABLED
:
214 IWL_WARN(priv
, "Invalid MIMO PS mode %d\n", mimo_ps_mode
);
218 sta_flags
|= cpu_to_le32(
219 (u32
)sta_ht_inf
->ampdu_factor
<< STA_FLG_MAX_AGG_SIZE_POS
);
221 sta_flags
|= cpu_to_le32(
222 (u32
)sta_ht_inf
->ampdu_density
<< STA_FLG_AGG_MPDU_DENSITY_POS
);
224 if (iwl_is_ht40_tx_allowed(priv
, ctx
, &sta
->ht_cap
))
225 sta_flags
|= STA_FLG_HT40_EN_MSK
;
227 sta_flags
&= ~STA_FLG_HT40_EN_MSK
;
229 priv
->stations
[index
].sta
.station_flags
= sta_flags
;
235 * iwl_prep_station - Prepare station information for addition
237 * should be called with sta_lock held
239 u8
iwl_prep_station(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
,
240 const u8
*addr
, bool is_ap
, struct ieee80211_sta
*sta
)
242 struct iwl_station_entry
*station
;
244 u8 sta_id
= IWL_INVALID_STATION
;
247 sta_id
= ctx
->ap_sta_id
;
248 else if (is_broadcast_ether_addr(addr
))
249 sta_id
= ctx
->bcast_sta_id
;
251 for (i
= IWL_STA_ID
; i
< IWLAGN_STATION_COUNT
; i
++) {
252 if (!compare_ether_addr(priv
->stations
[i
].sta
.sta
.addr
,
258 if (!priv
->stations
[i
].used
&&
259 sta_id
== IWL_INVALID_STATION
)
264 * These two conditions have the same outcome, but keep them
267 if (unlikely(sta_id
== IWL_INVALID_STATION
))
271 * uCode is not able to deal with multiple requests to add a
272 * station. Keep track if one is in progress so that we do not send
275 if (priv
->stations
[sta_id
].used
& IWL_STA_UCODE_INPROGRESS
) {
276 IWL_DEBUG_INFO(priv
, "STA %d already in process of being added.\n",
281 if ((priv
->stations
[sta_id
].used
& IWL_STA_DRIVER_ACTIVE
) &&
282 (priv
->stations
[sta_id
].used
& IWL_STA_UCODE_ACTIVE
) &&
283 !compare_ether_addr(priv
->stations
[sta_id
].sta
.sta
.addr
, addr
)) {
284 IWL_DEBUG_ASSOC(priv
, "STA %d (%pM) already added, not adding again.\n",
289 station
= &priv
->stations
[sta_id
];
290 station
->used
= IWL_STA_DRIVER_ACTIVE
;
291 IWL_DEBUG_ASSOC(priv
, "Add STA to driver ID %d: %pM\n",
293 priv
->num_stations
++;
295 /* Set up the REPLY_ADD_STA command to send to device */
296 memset(&station
->sta
, 0, sizeof(struct iwl_addsta_cmd
));
297 memcpy(station
->sta
.sta
.addr
, addr
, ETH_ALEN
);
298 station
->sta
.mode
= 0;
299 station
->sta
.sta
.sta_id
= sta_id
;
300 station
->sta
.station_flags
= ctx
->station_flags
;
301 station
->ctxid
= ctx
->ctxid
;
304 struct iwl_station_priv
*sta_priv
;
306 sta_priv
= (void *)sta
->drv_priv
;
311 * OK to call unconditionally, since local stations (IBSS BSSID
312 * STA and broadcast STA) pass in a NULL sta, and mac80211
313 * doesn't allow HT IBSS.
315 iwl_set_ht_add_station(priv
, sta_id
, sta
, ctx
);
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
->shrd
->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
->shrd
->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
->shrd
->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
->shrd
->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
->shrd
->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
->shrd
->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
->shrd
->sta_lock
, flags_spin
);
384 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
386 * priv->shrd->sta_lock must be held
388 static void iwl_sta_ucode_deactivate(struct iwl_priv
*priv
, u8 sta_id
)
390 /* Ucode must be active and driver must be non active */
391 if ((priv
->stations
[sta_id
].used
&
392 (IWL_STA_UCODE_ACTIVE
| IWL_STA_DRIVER_ACTIVE
)) != IWL_STA_UCODE_ACTIVE
)
393 IWL_ERR(priv
, "removed non active STA %u\n", sta_id
);
395 priv
->stations
[sta_id
].used
&= ~IWL_STA_UCODE_ACTIVE
;
397 memset(&priv
->stations
[sta_id
], 0, sizeof(struct iwl_station_entry
));
398 IWL_DEBUG_ASSOC(priv
, "Removed STA %u\n", sta_id
);
401 static int iwl_send_remove_station(struct iwl_priv
*priv
,
402 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
), },
415 .data
= { &rm_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_trans_send_cmd(trans(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
:
440 spin_lock_irqsave(&priv
->shrd
->sta_lock
,
442 iwl_sta_ucode_deactivate(priv
, sta_id
);
443 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
,
446 IWL_DEBUG_ASSOC(priv
, "REPLY_REMOVE_STA PASSED\n");
450 IWL_ERR(priv
, "REPLY_REMOVE_STA failed\n");
454 iwl_free_pages(priv
->shrd
, cmd
.reply_page
);
460 * iwl_remove_station - Remove driver's knowledge of station.
462 int iwl_remove_station(struct iwl_priv
*priv
, const u8 sta_id
,
467 if (!iwl_is_ready(priv
->shrd
)) {
469 "Unable to remove station %pM, device not ready.\n",
472 * It is typical for stations to be removed when we are
473 * going down. Return success since device will be down
479 IWL_DEBUG_ASSOC(priv
, "Removing STA from driver:%d %pM\n",
482 if (WARN_ON(sta_id
== IWL_INVALID_STATION
))
485 spin_lock_irqsave(&priv
->shrd
->sta_lock
, flags
);
487 if (!(priv
->stations
[sta_id
].used
& IWL_STA_DRIVER_ACTIVE
)) {
488 IWL_DEBUG_INFO(priv
, "Removing %pM but non DRIVER active\n",
493 if (!(priv
->stations
[sta_id
].used
& IWL_STA_UCODE_ACTIVE
)) {
494 IWL_DEBUG_INFO(priv
, "Removing %pM but non UCODE active\n",
499 if (priv
->stations
[sta_id
].used
& IWL_STA_LOCAL
) {
500 kfree(priv
->stations
[sta_id
].lq
);
501 priv
->stations
[sta_id
].lq
= NULL
;
504 priv
->stations
[sta_id
].used
&= ~IWL_STA_DRIVER_ACTIVE
;
506 priv
->num_stations
--;
508 if (WARN_ON(priv
->num_stations
< 0))
509 priv
->num_stations
= 0;
511 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
, flags
);
513 return iwl_send_remove_station(priv
, addr
, sta_id
, false);
515 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
, flags
);
520 * iwl_clear_ucode_stations - clear ucode station table bits
522 * This function clears all the bits in the driver indicating
523 * which stations are active in the ucode. Call when something
524 * other than explicit station management would cause this in
525 * the ucode, e.g. unassociated RXON.
527 void iwl_clear_ucode_stations(struct iwl_priv
*priv
,
528 struct iwl_rxon_context
*ctx
)
531 unsigned long flags_spin
;
532 bool cleared
= false;
534 IWL_DEBUG_INFO(priv
, "Clearing ucode stations in driver\n");
536 spin_lock_irqsave(&priv
->shrd
->sta_lock
, flags_spin
);
537 for (i
= 0; i
< IWLAGN_STATION_COUNT
; i
++) {
538 if (ctx
&& ctx
->ctxid
!= priv
->stations
[i
].ctxid
)
541 if (priv
->stations
[i
].used
& IWL_STA_UCODE_ACTIVE
) {
542 IWL_DEBUG_INFO(priv
, "Clearing ucode active for station %d\n", i
);
543 priv
->stations
[i
].used
&= ~IWL_STA_UCODE_ACTIVE
;
547 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
, flags_spin
);
550 IWL_DEBUG_INFO(priv
, "No active stations found to be cleared\n");
554 * iwl_restore_stations() - Restore driver known stations to device
556 * All stations considered active by driver, but not present in ucode, is
561 void iwl_restore_stations(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
)
563 struct iwl_addsta_cmd sta_cmd
;
564 struct iwl_link_quality_cmd lq
;
565 unsigned long flags_spin
;
571 if (!iwl_is_ready(priv
->shrd
)) {
572 IWL_DEBUG_INFO(priv
, "Not ready yet, not restoring any stations.\n");
576 IWL_DEBUG_ASSOC(priv
, "Restoring all known stations ... start.\n");
577 spin_lock_irqsave(&priv
->shrd
->sta_lock
, flags_spin
);
578 for (i
= 0; i
< IWLAGN_STATION_COUNT
; i
++) {
579 if (ctx
->ctxid
!= priv
->stations
[i
].ctxid
)
581 if ((priv
->stations
[i
].used
& IWL_STA_DRIVER_ACTIVE
) &&
582 !(priv
->stations
[i
].used
& IWL_STA_UCODE_ACTIVE
)) {
583 IWL_DEBUG_ASSOC(priv
, "Restoring sta %pM\n",
584 priv
->stations
[i
].sta
.sta
.addr
);
585 priv
->stations
[i
].sta
.mode
= 0;
586 priv
->stations
[i
].used
|= IWL_STA_UCODE_INPROGRESS
;
591 for (i
= 0; i
< IWLAGN_STATION_COUNT
; i
++) {
592 if ((priv
->stations
[i
].used
& IWL_STA_UCODE_INPROGRESS
)) {
593 memcpy(&sta_cmd
, &priv
->stations
[i
].sta
,
594 sizeof(struct iwl_addsta_cmd
));
596 if (priv
->stations
[i
].lq
) {
597 if (priv
->shrd
->wowlan
)
598 iwl_sta_fill_lq(priv
, ctx
, i
, &lq
);
600 memcpy(&lq
, priv
->stations
[i
].lq
,
601 sizeof(struct iwl_link_quality_cmd
));
604 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
,
606 ret
= iwl_send_add_sta(priv
, &sta_cmd
, CMD_SYNC
);
608 spin_lock_irqsave(&priv
->shrd
->sta_lock
,
610 IWL_ERR(priv
, "Adding station %pM failed.\n",
611 priv
->stations
[i
].sta
.sta
.addr
);
612 priv
->stations
[i
].used
&= ~IWL_STA_DRIVER_ACTIVE
;
613 priv
->stations
[i
].used
&= ~IWL_STA_UCODE_INPROGRESS
;
614 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
,
618 * Rate scaling has already been initialized, send
622 iwl_send_lq_cmd(priv
, ctx
, &lq
, CMD_SYNC
, true);
623 spin_lock_irqsave(&priv
->shrd
->sta_lock
, flags_spin
);
624 priv
->stations
[i
].used
&= ~IWL_STA_UCODE_INPROGRESS
;
628 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
, flags_spin
);
630 IWL_DEBUG_INFO(priv
, "Restoring all known stations .... no stations to be restored.\n");
632 IWL_DEBUG_INFO(priv
, "Restoring all known stations .... complete.\n");
635 void iwl_reprogram_ap_sta(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
)
638 int sta_id
= ctx
->ap_sta_id
;
640 struct iwl_addsta_cmd sta_cmd
;
641 struct iwl_link_quality_cmd lq
;
644 spin_lock_irqsave(&priv
->shrd
->sta_lock
, flags
);
645 if (!(priv
->stations
[sta_id
].used
& IWL_STA_DRIVER_ACTIVE
)) {
646 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
, flags
);
650 memcpy(&sta_cmd
, &priv
->stations
[sta_id
].sta
, sizeof(sta_cmd
));
652 memcpy(&lq
, priv
->stations
[sta_id
].lq
, sizeof(lq
));
654 active
= priv
->stations
[sta_id
].used
& IWL_STA_UCODE_ACTIVE
;
655 priv
->stations
[sta_id
].used
&= ~IWL_STA_DRIVER_ACTIVE
;
656 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
, flags
);
659 ret
= iwl_send_remove_station(
660 priv
, priv
->stations
[sta_id
].sta
.sta
.addr
,
663 IWL_ERR(priv
, "failed to remove STA %pM (%d)\n",
664 priv
->stations
[sta_id
].sta
.sta
.addr
, ret
);
666 spin_lock_irqsave(&priv
->shrd
->sta_lock
, flags
);
667 priv
->stations
[sta_id
].used
|= IWL_STA_DRIVER_ACTIVE
;
668 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
, flags
);
670 ret
= iwl_send_add_sta(priv
, &sta_cmd
, CMD_SYNC
);
672 IWL_ERR(priv
, "failed to re-add STA %pM (%d)\n",
673 priv
->stations
[sta_id
].sta
.sta
.addr
, ret
);
674 iwl_send_lq_cmd(priv
, ctx
, &lq
, CMD_SYNC
, true);
677 int iwl_get_free_ucode_key_offset(struct iwl_priv
*priv
)
681 for (i
= 0; i
< priv
->sta_key_max_num
; i
++)
682 if (!test_and_set_bit(i
, &priv
->ucode_key_table
))
685 return WEP_INVALID_OFFSET
;
688 void iwl_dealloc_bcast_stations(struct iwl_priv
*priv
)
693 spin_lock_irqsave(&priv
->shrd
->sta_lock
, flags
);
694 for (i
= 0; i
< IWLAGN_STATION_COUNT
; i
++) {
695 if (!(priv
->stations
[i
].used
& IWL_STA_BCAST
))
698 priv
->stations
[i
].used
&= ~IWL_STA_UCODE_ACTIVE
;
699 priv
->num_stations
--;
700 if (WARN_ON(priv
->num_stations
< 0))
701 priv
->num_stations
= 0;
702 kfree(priv
->stations
[i
].lq
);
703 priv
->stations
[i
].lq
= NULL
;
705 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
, flags
);
708 #ifdef CONFIG_IWLWIFI_DEBUG
709 static void iwl_dump_lq_cmd(struct iwl_priv
*priv
,
710 struct iwl_link_quality_cmd
*lq
)
713 IWL_DEBUG_RATE(priv
, "lq station id 0x%x\n", lq
->sta_id
);
714 IWL_DEBUG_RATE(priv
, "lq ant 0x%X 0x%X\n",
715 lq
->general_params
.single_stream_ant_msk
,
716 lq
->general_params
.dual_stream_ant_msk
);
718 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++)
719 IWL_DEBUG_RATE(priv
, "lq index %d 0x%X\n",
720 i
, lq
->rs_table
[i
].rate_n_flags
);
723 static inline void iwl_dump_lq_cmd(struct iwl_priv
*priv
,
724 struct iwl_link_quality_cmd
*lq
)
730 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
732 * It sometimes happens when a HT rate has been in use and we
733 * loose connectivity with AP then mac80211 will first tell us that the
734 * current channel is not HT anymore before removing the station. In such a
735 * scenario the RXON flags will be updated to indicate we are not
736 * communicating HT anymore, but the LQ command may still contain HT rates.
737 * Test for this to prevent driver from sending LQ command between the time
738 * RXON flags are updated and when LQ command is updated.
740 static bool is_lq_table_valid(struct iwl_priv
*priv
,
741 struct iwl_rxon_context
*ctx
,
742 struct iwl_link_quality_cmd
*lq
)
749 IWL_DEBUG_INFO(priv
, "Channel %u is not an HT channel\n",
750 ctx
->active
.channel
);
751 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++) {
752 if (le32_to_cpu(lq
->rs_table
[i
].rate_n_flags
) & RATE_MCS_HT_MSK
) {
754 "index %d of LQ expects HT channel\n",
763 * iwl_send_lq_cmd() - Send link quality command
764 * @init: This command is sent as part of station initialization right
765 * after station has been added.
767 * The link quality command is sent as the last step of station creation.
768 * This is the special case in which init is set and we call a callback in
769 * this case to clear the state indicating that station creation is in
772 int iwl_send_lq_cmd(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
,
773 struct iwl_link_quality_cmd
*lq
, u8 flags
, bool init
)
776 unsigned long flags_spin
;
778 struct iwl_host_cmd cmd
= {
779 .id
= REPLY_TX_LINK_QUALITY_CMD
,
780 .len
= { sizeof(struct iwl_link_quality_cmd
), },
785 if (WARN_ON(lq
->sta_id
== IWL_INVALID_STATION
))
789 spin_lock_irqsave(&priv
->shrd
->sta_lock
, flags_spin
);
790 if (!(priv
->stations
[lq
->sta_id
].used
& IWL_STA_DRIVER_ACTIVE
)) {
791 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
, flags_spin
);
794 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
, flags_spin
);
796 iwl_dump_lq_cmd(priv
, lq
);
797 if (WARN_ON(init
&& (cmd
.flags
& CMD_ASYNC
)))
800 if (is_lq_table_valid(priv
, ctx
, lq
))
801 ret
= iwl_trans_send_cmd(trans(priv
), &cmd
);
805 if (cmd
.flags
& CMD_ASYNC
)
809 IWL_DEBUG_INFO(priv
, "init LQ command complete, clearing sta addition status for sta %d\n",
811 spin_lock_irqsave(&priv
->shrd
->sta_lock
, flags_spin
);
812 priv
->stations
[lq
->sta_id
].used
&= ~IWL_STA_UCODE_INPROGRESS
;
813 spin_unlock_irqrestore(&priv
->shrd
->sta_lock
, flags_spin
);
818 int iwl_mac_sta_remove(struct ieee80211_hw
*hw
,
819 struct ieee80211_vif
*vif
,
820 struct ieee80211_sta
*sta
)
822 struct iwl_priv
*priv
= hw
->priv
;
823 struct iwl_station_priv
*sta_priv
= (void *)sta
->drv_priv
;
826 IWL_DEBUG_MAC80211(priv
, "enter: received request to remove "
827 "station %pM\n", sta
->addr
);
828 mutex_lock(&priv
->shrd
->mutex
);
829 IWL_DEBUG_INFO(priv
, "proceeding to remove station %pM\n",
831 ret
= iwl_remove_station(priv
, sta_priv
->sta_id
, sta
->addr
);
833 IWL_ERR(priv
, "Error removing station %pM\n",
835 mutex_unlock(&priv
->shrd
->mutex
);
836 IWL_DEBUG_MAC80211(priv
, "leave\n");