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iwlwifi: get the correct HCMD in the response handler
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / dvm / sta.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
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.
11 *
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
15 * more details.
16 *
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
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29 #include <linux/etherdevice.h>
30 #include <net/mac80211.h>
31 #include "iwl-trans.h"
32 #include "dev.h"
33 #include "agn.h"
34
35 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
36
37 static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
38 {
39 lockdep_assert_held(&priv->sta_lock);
40
41 if (sta_id >= IWLAGN_STATION_COUNT) {
42 IWL_ERR(priv, "invalid sta_id %u", sta_id);
43 return -EINVAL;
44 }
45 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
46 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
47 "addr %pM\n",
48 sta_id, priv->stations[sta_id].sta.sta.addr);
49
50 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
51 IWL_DEBUG_ASSOC(priv,
52 "STA id %u addr %pM already present in uCode "
53 "(according to driver)\n",
54 sta_id, priv->stations[sta_id].sta.sta.addr);
55 } else {
56 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
57 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
58 sta_id, priv->stations[sta_id].sta.sta.addr);
59 }
60 return 0;
61 }
62
63 static int iwl_process_add_sta_resp(struct iwl_priv *priv,
64 struct iwl_addsta_cmd *addsta,
65 struct iwl_rx_packet *pkt)
66 {
67 struct iwl_add_sta_resp *add_sta_resp = (void *)pkt->data;
68 u8 sta_id = addsta->sta.sta_id;
69 int ret = -EIO;
70
71 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
72 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
73 pkt->hdr.flags);
74 return ret;
75 }
76
77 IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
78 sta_id);
79
80 spin_lock(&priv->sta_lock);
81
82 switch (add_sta_resp->status) {
83 case ADD_STA_SUCCESS_MSK:
84 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
85 ret = iwl_sta_ucode_activate(priv, sta_id);
86 break;
87 case ADD_STA_NO_ROOM_IN_TABLE:
88 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
89 sta_id);
90 break;
91 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
92 IWL_ERR(priv, "Adding station %d failed, no block ack "
93 "resource.\n", sta_id);
94 break;
95 case ADD_STA_MODIFY_NON_EXIST_STA:
96 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
97 sta_id);
98 break;
99 default:
100 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
101 add_sta_resp->status);
102 break;
103 }
104
105 IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
106 priv->stations[sta_id].sta.mode ==
107 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
108 sta_id, priv->stations[sta_id].sta.sta.addr);
109
110 /*
111 * XXX: The MAC address in the command buffer is often changed from
112 * the original sent to the device. That is, the MAC address
113 * written to the command buffer often is not the same MAC address
114 * read from the command buffer when the command returns. This
115 * issue has not yet been resolved and this debugging is left to
116 * observe the problem.
117 */
118 IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
119 priv->stations[sta_id].sta.mode ==
120 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
121 addsta->sta.addr);
122 spin_unlock(&priv->sta_lock);
123
124 return ret;
125 }
126
127 int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
128 struct iwl_device_cmd *cmd)
129 {
130 struct iwl_rx_packet *pkt = rxb_addr(rxb);
131 struct iwl_addsta_cmd *addsta =
132 (struct iwl_addsta_cmd *) cmd->payload;
133
134 return iwl_process_add_sta_resp(priv, addsta, pkt);
135 }
136
137 int iwl_send_add_sta(struct iwl_priv *priv,
138 struct iwl_addsta_cmd *sta, u8 flags)
139 {
140 int ret = 0;
141 struct iwl_host_cmd cmd = {
142 .id = REPLY_ADD_STA,
143 .flags = flags,
144 .data = { sta, },
145 .len = { sizeof(*sta), },
146 };
147 u8 sta_id __maybe_unused = sta->sta.sta_id;
148
149 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
150 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
151
152 if (!(flags & CMD_ASYNC)) {
153 cmd.flags |= CMD_WANT_SKB | CMD_WANT_HCMD;
154 might_sleep();
155 }
156
157 ret = iwl_dvm_send_cmd(priv, &cmd);
158
159 if (ret || (flags & CMD_ASYNC))
160 return ret;
161 /*else the command was successfully sent in SYNC mode, need to free
162 * the reply page */
163
164 iwl_free_resp(&cmd);
165
166 if (cmd.handler_status)
167 IWL_ERR(priv, "%s - error in the CMD response %d", __func__,
168 cmd.handler_status);
169
170 return cmd.handler_status;
171 }
172
173 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
174 struct iwl_rxon_context *ctx,
175 struct ieee80211_sta_ht_cap *ht_cap)
176 {
177 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
178 return false;
179
180 #ifdef CONFIG_IWLWIFI_DEBUGFS
181 if (priv->disable_ht40)
182 return false;
183 #endif
184
185 /*
186 * Remainder of this function checks ht_cap, but if it's
187 * NULL then we can do HT40 (special case for RXON)
188 */
189 if (!ht_cap)
190 return true;
191
192 if (!ht_cap->ht_supported)
193 return false;
194
195 if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
196 return false;
197
198 return true;
199 }
200
201 static void iwl_sta_calc_ht_flags(struct iwl_priv *priv,
202 struct ieee80211_sta *sta,
203 struct iwl_rxon_context *ctx,
204 __le32 *flags, __le32 *mask)
205 {
206 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
207 u8 mimo_ps_mode;
208
209 *mask = STA_FLG_RTS_MIMO_PROT_MSK |
210 STA_FLG_MIMO_DIS_MSK |
211 STA_FLG_HT40_EN_MSK |
212 STA_FLG_MAX_AGG_SIZE_MSK |
213 STA_FLG_AGG_MPDU_DENSITY_MSK;
214 *flags = 0;
215
216 if (!sta || !sta_ht_inf->ht_supported)
217 return;
218
219 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
220
221 IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n",
222 sta->addr,
223 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
224 "static" :
225 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
226 "dynamic" : "disabled");
227
228 switch (mimo_ps_mode) {
229 case WLAN_HT_CAP_SM_PS_STATIC:
230 *flags |= STA_FLG_MIMO_DIS_MSK;
231 break;
232 case WLAN_HT_CAP_SM_PS_DYNAMIC:
233 *flags |= STA_FLG_RTS_MIMO_PROT_MSK;
234 break;
235 case WLAN_HT_CAP_SM_PS_DISABLED:
236 break;
237 default:
238 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
239 break;
240 }
241
242 *flags |= cpu_to_le32(
243 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
244
245 *flags |= cpu_to_le32(
246 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
247
248 if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
249 *flags |= STA_FLG_HT40_EN_MSK;
250 }
251
252 int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
253 struct ieee80211_sta *sta)
254 {
255 u8 sta_id = iwl_sta_id(sta);
256 __le32 flags, mask;
257 struct iwl_addsta_cmd cmd;
258
259 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
260 return -EINVAL;
261
262 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
263
264 spin_lock_bh(&priv->sta_lock);
265 priv->stations[sta_id].sta.station_flags &= ~mask;
266 priv->stations[sta_id].sta.station_flags |= flags;
267 spin_unlock_bh(&priv->sta_lock);
268
269 memset(&cmd, 0, sizeof(cmd));
270 cmd.mode = STA_CONTROL_MODIFY_MSK;
271 cmd.station_flags_msk = mask;
272 cmd.station_flags = flags;
273 cmd.sta.sta_id = sta_id;
274
275 return iwl_send_add_sta(priv, &cmd, CMD_SYNC);
276 }
277
278 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
279 struct ieee80211_sta *sta,
280 struct iwl_rxon_context *ctx)
281 {
282 __le32 flags, mask;
283
284 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
285
286 lockdep_assert_held(&priv->sta_lock);
287 priv->stations[index].sta.station_flags &= ~mask;
288 priv->stations[index].sta.station_flags |= flags;
289 }
290
291 /**
292 * iwl_prep_station - Prepare station information for addition
293 *
294 * should be called with sta_lock held
295 */
296 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
297 const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
298 {
299 struct iwl_station_entry *station;
300 int i;
301 u8 sta_id = IWL_INVALID_STATION;
302
303 if (is_ap)
304 sta_id = ctx->ap_sta_id;
305 else if (is_broadcast_ether_addr(addr))
306 sta_id = ctx->bcast_sta_id;
307 else
308 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
309 if (ether_addr_equal(priv->stations[i].sta.sta.addr,
310 addr)) {
311 sta_id = i;
312 break;
313 }
314
315 if (!priv->stations[i].used &&
316 sta_id == IWL_INVALID_STATION)
317 sta_id = i;
318 }
319
320 /*
321 * These two conditions have the same outcome, but keep them
322 * separate
323 */
324 if (unlikely(sta_id == IWL_INVALID_STATION))
325 return sta_id;
326
327 /*
328 * uCode is not able to deal with multiple requests to add a
329 * station. Keep track if one is in progress so that we do not send
330 * another.
331 */
332 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
333 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
334 "added.\n", sta_id);
335 return sta_id;
336 }
337
338 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
339 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
340 ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) {
341 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
342 "adding again.\n", sta_id, addr);
343 return sta_id;
344 }
345
346 station = &priv->stations[sta_id];
347 station->used = IWL_STA_DRIVER_ACTIVE;
348 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
349 sta_id, addr);
350 priv->num_stations++;
351
352 /* Set up the REPLY_ADD_STA command to send to device */
353 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
354 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
355 station->sta.mode = 0;
356 station->sta.sta.sta_id = sta_id;
357 station->sta.station_flags = ctx->station_flags;
358 station->ctxid = ctx->ctxid;
359
360 if (sta) {
361 struct iwl_station_priv *sta_priv;
362
363 sta_priv = (void *)sta->drv_priv;
364 sta_priv->ctx = ctx;
365 }
366
367 /*
368 * OK to call unconditionally, since local stations (IBSS BSSID
369 * STA and broadcast STA) pass in a NULL sta, and mac80211
370 * doesn't allow HT IBSS.
371 */
372 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
373
374 return sta_id;
375
376 }
377
378 #define STA_WAIT_TIMEOUT (HZ/2)
379
380 /**
381 * iwl_add_station_common -
382 */
383 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
384 const u8 *addr, bool is_ap,
385 struct ieee80211_sta *sta, u8 *sta_id_r)
386 {
387 int ret = 0;
388 u8 sta_id;
389 struct iwl_addsta_cmd sta_cmd;
390
391 *sta_id_r = 0;
392 spin_lock_bh(&priv->sta_lock);
393 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
394 if (sta_id == IWL_INVALID_STATION) {
395 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
396 addr);
397 spin_unlock_bh(&priv->sta_lock);
398 return -EINVAL;
399 }
400
401 /*
402 * uCode is not able to deal with multiple requests to add a
403 * station. Keep track if one is in progress so that we do not send
404 * another.
405 */
406 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
407 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
408 "added.\n", sta_id);
409 spin_unlock_bh(&priv->sta_lock);
410 return -EEXIST;
411 }
412
413 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
414 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
415 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
416 "adding again.\n", sta_id, addr);
417 spin_unlock_bh(&priv->sta_lock);
418 return -EEXIST;
419 }
420
421 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
422 memcpy(&sta_cmd, &priv->stations[sta_id].sta,
423 sizeof(struct iwl_addsta_cmd));
424 spin_unlock_bh(&priv->sta_lock);
425
426 /* Add station to device's station table */
427 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
428 if (ret) {
429 spin_lock_bh(&priv->sta_lock);
430 IWL_ERR(priv, "Adding station %pM failed.\n",
431 priv->stations[sta_id].sta.sta.addr);
432 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
433 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
434 spin_unlock_bh(&priv->sta_lock);
435 }
436 *sta_id_r = sta_id;
437 return ret;
438 }
439
440 /**
441 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
442 */
443 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
444 {
445 lockdep_assert_held(&priv->sta_lock);
446
447 /* Ucode must be active and driver must be non active */
448 if ((priv->stations[sta_id].used &
449 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
450 IWL_STA_UCODE_ACTIVE)
451 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
452
453 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
454
455 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
456 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
457 }
458
459 static int iwl_send_remove_station(struct iwl_priv *priv,
460 const u8 *addr, int sta_id,
461 bool temporary)
462 {
463 struct iwl_rx_packet *pkt;
464 int ret;
465 struct iwl_rem_sta_cmd rm_sta_cmd;
466
467 struct iwl_host_cmd cmd = {
468 .id = REPLY_REMOVE_STA,
469 .len = { sizeof(struct iwl_rem_sta_cmd), },
470 .flags = CMD_SYNC,
471 .data = { &rm_sta_cmd, },
472 };
473
474 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
475 rm_sta_cmd.num_sta = 1;
476 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
477
478 cmd.flags |= CMD_WANT_SKB;
479
480 ret = iwl_dvm_send_cmd(priv, &cmd);
481
482 if (ret)
483 return ret;
484
485 pkt = cmd.resp_pkt;
486 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
487 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
488 pkt->hdr.flags);
489 ret = -EIO;
490 }
491
492 if (!ret) {
493 struct iwl_rem_sta_resp *rem_sta_resp = (void *)pkt->data;
494 switch (rem_sta_resp->status) {
495 case REM_STA_SUCCESS_MSK:
496 if (!temporary) {
497 spin_lock_bh(&priv->sta_lock);
498 iwl_sta_ucode_deactivate(priv, sta_id);
499 spin_unlock_bh(&priv->sta_lock);
500 }
501 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
502 break;
503 default:
504 ret = -EIO;
505 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
506 break;
507 }
508 }
509 iwl_free_resp(&cmd);
510
511 return ret;
512 }
513
514 /**
515 * iwl_remove_station - Remove driver's knowledge of station.
516 */
517 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
518 const u8 *addr)
519 {
520 u8 tid;
521
522 if (!iwl_is_ready(priv)) {
523 IWL_DEBUG_INFO(priv,
524 "Unable to remove station %pM, device not ready.\n",
525 addr);
526 /*
527 * It is typical for stations to be removed when we are
528 * going down. Return success since device will be down
529 * soon anyway
530 */
531 return 0;
532 }
533
534 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
535 sta_id, addr);
536
537 if (WARN_ON(sta_id == IWL_INVALID_STATION))
538 return -EINVAL;
539
540 spin_lock_bh(&priv->sta_lock);
541
542 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
543 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
544 addr);
545 goto out_err;
546 }
547
548 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
549 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
550 addr);
551 goto out_err;
552 }
553
554 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
555 kfree(priv->stations[sta_id].lq);
556 priv->stations[sta_id].lq = NULL;
557 }
558
559 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
560 memset(&priv->tid_data[sta_id][tid], 0,
561 sizeof(priv->tid_data[sta_id][tid]));
562
563 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
564
565 priv->num_stations--;
566
567 if (WARN_ON(priv->num_stations < 0))
568 priv->num_stations = 0;
569
570 spin_unlock_bh(&priv->sta_lock);
571
572 return iwl_send_remove_station(priv, addr, sta_id, false);
573 out_err:
574 spin_unlock_bh(&priv->sta_lock);
575 return -EINVAL;
576 }
577
578 void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
579 const u8 *addr)
580 {
581 u8 tid;
582
583 if (!iwl_is_ready(priv)) {
584 IWL_DEBUG_INFO(priv,
585 "Unable to remove station %pM, device not ready.\n",
586 addr);
587 return;
588 }
589
590 IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id);
591
592 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
593 return;
594
595 spin_lock_bh(&priv->sta_lock);
596
597 WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE));
598
599 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
600 memset(&priv->tid_data[sta_id][tid], 0,
601 sizeof(priv->tid_data[sta_id][tid]));
602
603 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
604
605 priv->num_stations--;
606
607 if (WARN_ON_ONCE(priv->num_stations < 0))
608 priv->num_stations = 0;
609
610 spin_unlock_bh(&priv->sta_lock);
611 }
612
613 static void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
614 u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
615 {
616 int i, r;
617 u32 rate_flags = 0;
618 __le32 rate_n_flags;
619
620 lockdep_assert_held(&priv->mutex);
621
622 memset(link_cmd, 0, sizeof(*link_cmd));
623
624 /* Set up the rate scaling to start at selected rate, fall back
625 * all the way down to 1M in IEEE order, and then spin on 1M */
626 if (priv->band == IEEE80211_BAND_5GHZ)
627 r = IWL_RATE_6M_INDEX;
628 else if (ctx && ctx->vif && ctx->vif->p2p)
629 r = IWL_RATE_6M_INDEX;
630 else
631 r = IWL_RATE_1M_INDEX;
632
633 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
634 rate_flags |= RATE_MCS_CCK_MSK;
635
636 rate_flags |= first_antenna(priv->eeprom_data->valid_tx_ant) <<
637 RATE_MCS_ANT_POS;
638 rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
639 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
640 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
641
642 link_cmd->general_params.single_stream_ant_msk =
643 first_antenna(priv->eeprom_data->valid_tx_ant);
644
645 link_cmd->general_params.dual_stream_ant_msk =
646 priv->eeprom_data->valid_tx_ant &
647 ~first_antenna(priv->eeprom_data->valid_tx_ant);
648 if (!link_cmd->general_params.dual_stream_ant_msk) {
649 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
650 } else if (num_of_ant(priv->eeprom_data->valid_tx_ant) == 2) {
651 link_cmd->general_params.dual_stream_ant_msk =
652 priv->eeprom_data->valid_tx_ant;
653 }
654
655 link_cmd->agg_params.agg_dis_start_th =
656 LINK_QUAL_AGG_DISABLE_START_DEF;
657 link_cmd->agg_params.agg_time_limit =
658 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
659
660 link_cmd->sta_id = sta_id;
661 }
662
663 /**
664 * iwl_clear_ucode_stations - clear ucode station table bits
665 *
666 * This function clears all the bits in the driver indicating
667 * which stations are active in the ucode. Call when something
668 * other than explicit station management would cause this in
669 * the ucode, e.g. unassociated RXON.
670 */
671 void iwl_clear_ucode_stations(struct iwl_priv *priv,
672 struct iwl_rxon_context *ctx)
673 {
674 int i;
675 bool cleared = false;
676
677 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
678
679 spin_lock_bh(&priv->sta_lock);
680 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
681 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
682 continue;
683
684 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
685 IWL_DEBUG_INFO(priv,
686 "Clearing ucode active for station %d\n", i);
687 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
688 cleared = true;
689 }
690 }
691 spin_unlock_bh(&priv->sta_lock);
692
693 if (!cleared)
694 IWL_DEBUG_INFO(priv,
695 "No active stations found to be cleared\n");
696 }
697
698 /**
699 * iwl_restore_stations() - Restore driver known stations to device
700 *
701 * All stations considered active by driver, but not present in ucode, is
702 * restored.
703 *
704 * Function sleeps.
705 */
706 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
707 {
708 struct iwl_addsta_cmd sta_cmd;
709 struct iwl_link_quality_cmd lq;
710 int i;
711 bool found = false;
712 int ret;
713 bool send_lq;
714
715 if (!iwl_is_ready(priv)) {
716 IWL_DEBUG_INFO(priv,
717 "Not ready yet, not restoring any stations.\n");
718 return;
719 }
720
721 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
722 spin_lock_bh(&priv->sta_lock);
723 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
724 if (ctx->ctxid != priv->stations[i].ctxid)
725 continue;
726 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
727 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
728 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
729 priv->stations[i].sta.sta.addr);
730 priv->stations[i].sta.mode = 0;
731 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
732 found = true;
733 }
734 }
735
736 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
737 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
738 memcpy(&sta_cmd, &priv->stations[i].sta,
739 sizeof(struct iwl_addsta_cmd));
740 send_lq = false;
741 if (priv->stations[i].lq) {
742 if (priv->wowlan)
743 iwl_sta_fill_lq(priv, ctx, i, &lq);
744 else
745 memcpy(&lq, priv->stations[i].lq,
746 sizeof(struct iwl_link_quality_cmd));
747 send_lq = true;
748 }
749 spin_unlock_bh(&priv->sta_lock);
750 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
751 if (ret) {
752 spin_lock_bh(&priv->sta_lock);
753 IWL_ERR(priv, "Adding station %pM failed.\n",
754 priv->stations[i].sta.sta.addr);
755 priv->stations[i].used &=
756 ~IWL_STA_DRIVER_ACTIVE;
757 priv->stations[i].used &=
758 ~IWL_STA_UCODE_INPROGRESS;
759 continue;
760 }
761 /*
762 * Rate scaling has already been initialized, send
763 * current LQ command
764 */
765 if (send_lq)
766 iwl_send_lq_cmd(priv, ctx, &lq,
767 CMD_SYNC, true);
768 spin_lock_bh(&priv->sta_lock);
769 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
770 }
771 }
772
773 spin_unlock_bh(&priv->sta_lock);
774 if (!found)
775 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
776 "no stations to be restored.\n");
777 else
778 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
779 "complete.\n");
780 }
781
782 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
783 {
784 int i;
785
786 for (i = 0; i < priv->sta_key_max_num; i++)
787 if (!test_and_set_bit(i, &priv->ucode_key_table))
788 return i;
789
790 return WEP_INVALID_OFFSET;
791 }
792
793 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
794 {
795 int i;
796
797 spin_lock_bh(&priv->sta_lock);
798 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
799 if (!(priv->stations[i].used & IWL_STA_BCAST))
800 continue;
801
802 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
803 priv->num_stations--;
804 if (WARN_ON(priv->num_stations < 0))
805 priv->num_stations = 0;
806 kfree(priv->stations[i].lq);
807 priv->stations[i].lq = NULL;
808 }
809 spin_unlock_bh(&priv->sta_lock);
810 }
811
812 #ifdef CONFIG_IWLWIFI_DEBUG
813 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
814 struct iwl_link_quality_cmd *lq)
815 {
816 int i;
817 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
818 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
819 lq->general_params.single_stream_ant_msk,
820 lq->general_params.dual_stream_ant_msk);
821
822 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
823 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
824 i, lq->rs_table[i].rate_n_flags);
825 }
826 #else
827 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
828 struct iwl_link_quality_cmd *lq)
829 {
830 }
831 #endif
832
833 /**
834 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
835 *
836 * It sometimes happens when a HT rate has been in use and we
837 * loose connectivity with AP then mac80211 will first tell us that the
838 * current channel is not HT anymore before removing the station. In such a
839 * scenario the RXON flags will be updated to indicate we are not
840 * communicating HT anymore, but the LQ command may still contain HT rates.
841 * Test for this to prevent driver from sending LQ command between the time
842 * RXON flags are updated and when LQ command is updated.
843 */
844 static bool is_lq_table_valid(struct iwl_priv *priv,
845 struct iwl_rxon_context *ctx,
846 struct iwl_link_quality_cmd *lq)
847 {
848 int i;
849
850 if (ctx->ht.enabled)
851 return true;
852
853 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
854 ctx->active.channel);
855 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
856 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
857 RATE_MCS_HT_MSK) {
858 IWL_DEBUG_INFO(priv,
859 "index %d of LQ expects HT channel\n",
860 i);
861 return false;
862 }
863 }
864 return true;
865 }
866
867 /**
868 * iwl_send_lq_cmd() - Send link quality command
869 * @init: This command is sent as part of station initialization right
870 * after station has been added.
871 *
872 * The link quality command is sent as the last step of station creation.
873 * This is the special case in which init is set and we call a callback in
874 * this case to clear the state indicating that station creation is in
875 * progress.
876 */
877 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
878 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
879 {
880 int ret = 0;
881 struct iwl_host_cmd cmd = {
882 .id = REPLY_TX_LINK_QUALITY_CMD,
883 .len = { sizeof(struct iwl_link_quality_cmd), },
884 .flags = flags,
885 .data = { lq, },
886 };
887
888 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
889 return -EINVAL;
890
891
892 spin_lock_bh(&priv->sta_lock);
893 if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
894 spin_unlock_bh(&priv->sta_lock);
895 return -EINVAL;
896 }
897 spin_unlock_bh(&priv->sta_lock);
898
899 iwl_dump_lq_cmd(priv, lq);
900 if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
901 return -EINVAL;
902
903 if (is_lq_table_valid(priv, ctx, lq))
904 ret = iwl_dvm_send_cmd(priv, &cmd);
905 else
906 ret = -EINVAL;
907
908 if (cmd.flags & CMD_ASYNC)
909 return ret;
910
911 if (init) {
912 IWL_DEBUG_INFO(priv, "init LQ command complete, "
913 "clearing sta addition status for sta %d\n",
914 lq->sta_id);
915 spin_lock_bh(&priv->sta_lock);
916 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
917 spin_unlock_bh(&priv->sta_lock);
918 }
919 return ret;
920 }
921
922
923 static struct iwl_link_quality_cmd *
924 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
925 u8 sta_id)
926 {
927 struct iwl_link_quality_cmd *link_cmd;
928
929 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
930 if (!link_cmd) {
931 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
932 return NULL;
933 }
934
935 iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
936
937 return link_cmd;
938 }
939
940 /*
941 * iwlagn_add_bssid_station - Add the special IBSS BSSID station
942 *
943 * Function sleeps.
944 */
945 int iwlagn_add_bssid_station(struct iwl_priv *priv,
946 struct iwl_rxon_context *ctx,
947 const u8 *addr, u8 *sta_id_r)
948 {
949 int ret;
950 u8 sta_id;
951 struct iwl_link_quality_cmd *link_cmd;
952
953 if (sta_id_r)
954 *sta_id_r = IWL_INVALID_STATION;
955
956 ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
957 if (ret) {
958 IWL_ERR(priv, "Unable to add station %pM\n", addr);
959 return ret;
960 }
961
962 if (sta_id_r)
963 *sta_id_r = sta_id;
964
965 spin_lock_bh(&priv->sta_lock);
966 priv->stations[sta_id].used |= IWL_STA_LOCAL;
967 spin_unlock_bh(&priv->sta_lock);
968
969 /* Set up default rate scaling table in device's station table */
970 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
971 if (!link_cmd) {
972 IWL_ERR(priv,
973 "Unable to initialize rate scaling for station %pM.\n",
974 addr);
975 return -ENOMEM;
976 }
977
978 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true);
979 if (ret)
980 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
981
982 spin_lock_bh(&priv->sta_lock);
983 priv->stations[sta_id].lq = link_cmd;
984 spin_unlock_bh(&priv->sta_lock);
985
986 return 0;
987 }
988
989 /*
990 * static WEP keys
991 *
992 * For each context, the device has a table of 4 static WEP keys
993 * (one for each key index) that is updated with the following
994 * commands.
995 */
996
997 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
998 struct iwl_rxon_context *ctx,
999 bool send_if_empty)
1000 {
1001 int i, not_empty = 0;
1002 u8 buff[sizeof(struct iwl_wep_cmd) +
1003 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
1004 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
1005 size_t cmd_size = sizeof(struct iwl_wep_cmd);
1006 struct iwl_host_cmd cmd = {
1007 .id = ctx->wep_key_cmd,
1008 .data = { wep_cmd, },
1009 .flags = CMD_SYNC,
1010 };
1011
1012 might_sleep();
1013
1014 memset(wep_cmd, 0, cmd_size +
1015 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
1016
1017 for (i = 0; i < WEP_KEYS_MAX ; i++) {
1018 wep_cmd->key[i].key_index = i;
1019 if (ctx->wep_keys[i].key_size) {
1020 wep_cmd->key[i].key_offset = i;
1021 not_empty = 1;
1022 } else {
1023 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
1024 }
1025
1026 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
1027 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
1028 ctx->wep_keys[i].key_size);
1029 }
1030
1031 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
1032 wep_cmd->num_keys = WEP_KEYS_MAX;
1033
1034 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
1035
1036 cmd.len[0] = cmd_size;
1037
1038 if (not_empty || send_if_empty)
1039 return iwl_dvm_send_cmd(priv, &cmd);
1040 else
1041 return 0;
1042 }
1043
1044 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
1045 struct iwl_rxon_context *ctx)
1046 {
1047 lockdep_assert_held(&priv->mutex);
1048
1049 return iwl_send_static_wepkey_cmd(priv, ctx, false);
1050 }
1051
1052 int iwl_remove_default_wep_key(struct iwl_priv *priv,
1053 struct iwl_rxon_context *ctx,
1054 struct ieee80211_key_conf *keyconf)
1055 {
1056 int ret;
1057
1058 lockdep_assert_held(&priv->mutex);
1059
1060 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1061 keyconf->keyidx);
1062
1063 memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1064 if (iwl_is_rfkill(priv)) {
1065 IWL_DEBUG_WEP(priv,
1066 "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1067 /* but keys in device are clear anyway so return success */
1068 return 0;
1069 }
1070 ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1071 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1072 keyconf->keyidx, ret);
1073
1074 return ret;
1075 }
1076
1077 int iwl_set_default_wep_key(struct iwl_priv *priv,
1078 struct iwl_rxon_context *ctx,
1079 struct ieee80211_key_conf *keyconf)
1080 {
1081 int ret;
1082
1083 lockdep_assert_held(&priv->mutex);
1084
1085 if (keyconf->keylen != WEP_KEY_LEN_128 &&
1086 keyconf->keylen != WEP_KEY_LEN_64) {
1087 IWL_DEBUG_WEP(priv,
1088 "Bad WEP key length %d\n", keyconf->keylen);
1089 return -EINVAL;
1090 }
1091
1092 keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1093
1094 ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1095 memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1096 keyconf->keylen);
1097
1098 ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1099 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1100 keyconf->keylen, keyconf->keyidx, ret);
1101
1102 return ret;
1103 }
1104
1105 /*
1106 * dynamic (per-station) keys
1107 *
1108 * The dynamic keys are a little more complicated. The device has
1109 * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1110 * These are linked to stations by a table that contains an index
1111 * into the key table for each station/key index/{mcast,unicast},
1112 * i.e. it's basically an array of pointers like this:
1113 * key_offset_t key_mapping[NUM_STATIONS][4][2];
1114 * (it really works differently, but you can think of it as such)
1115 *
1116 * The key uploading and linking happens in the same command, the
1117 * add station command with STA_MODIFY_KEY_MASK.
1118 */
1119
1120 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1121 struct ieee80211_vif *vif,
1122 struct ieee80211_sta *sta)
1123 {
1124 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1125
1126 if (sta)
1127 return iwl_sta_id(sta);
1128
1129 /*
1130 * The device expects GTKs for station interfaces to be
1131 * installed as GTKs for the AP station. If we have no
1132 * station ID, then use the ap_sta_id in that case.
1133 */
1134 if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
1135 return vif_priv->ctx->ap_sta_id;
1136
1137 return IWL_INVALID_STATION;
1138 }
1139
1140 static int iwlagn_send_sta_key(struct iwl_priv *priv,
1141 struct ieee80211_key_conf *keyconf,
1142 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1143 u32 cmd_flags)
1144 {
1145 __le16 key_flags;
1146 struct iwl_addsta_cmd sta_cmd;
1147 int i;
1148
1149 spin_lock_bh(&priv->sta_lock);
1150 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1151 spin_unlock_bh(&priv->sta_lock);
1152
1153 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1154 key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1155
1156 switch (keyconf->cipher) {
1157 case WLAN_CIPHER_SUITE_CCMP:
1158 key_flags |= STA_KEY_FLG_CCMP;
1159 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1160 break;
1161 case WLAN_CIPHER_SUITE_TKIP:
1162 key_flags |= STA_KEY_FLG_TKIP;
1163 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1164 for (i = 0; i < 5; i++)
1165 sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1166 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1167 break;
1168 case WLAN_CIPHER_SUITE_WEP104:
1169 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1170 /* fall through */
1171 case WLAN_CIPHER_SUITE_WEP40:
1172 key_flags |= STA_KEY_FLG_WEP;
1173 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1174 break;
1175 default:
1176 WARN_ON(1);
1177 return -EINVAL;
1178 }
1179
1180 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1181 key_flags |= STA_KEY_MULTICAST_MSK;
1182
1183 /* key pointer (offset) */
1184 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1185
1186 sta_cmd.key.key_flags = key_flags;
1187 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1188 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1189
1190 return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1191 }
1192
1193 void iwl_update_tkip_key(struct iwl_priv *priv,
1194 struct ieee80211_vif *vif,
1195 struct ieee80211_key_conf *keyconf,
1196 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1197 {
1198 u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1199
1200 if (sta_id == IWL_INVALID_STATION)
1201 return;
1202
1203 if (iwl_scan_cancel(priv)) {
1204 /* cancel scan failed, just live w/ bad key and rely
1205 briefly on SW decryption */
1206 return;
1207 }
1208
1209 iwlagn_send_sta_key(priv, keyconf, sta_id,
1210 iv32, phase1key, CMD_ASYNC);
1211 }
1212
1213 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1214 struct iwl_rxon_context *ctx,
1215 struct ieee80211_key_conf *keyconf,
1216 struct ieee80211_sta *sta)
1217 {
1218 struct iwl_addsta_cmd sta_cmd;
1219 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1220 __le16 key_flags;
1221
1222 /* if station isn't there, neither is the key */
1223 if (sta_id == IWL_INVALID_STATION)
1224 return -ENOENT;
1225
1226 spin_lock_bh(&priv->sta_lock);
1227 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1228 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1229 sta_id = IWL_INVALID_STATION;
1230 spin_unlock_bh(&priv->sta_lock);
1231
1232 if (sta_id == IWL_INVALID_STATION)
1233 return 0;
1234
1235 lockdep_assert_held(&priv->mutex);
1236
1237 ctx->key_mapping_keys--;
1238
1239 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1240 keyconf->keyidx, sta_id);
1241
1242 if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1243 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1244 keyconf->hw_key_idx);
1245
1246 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1247 key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
1248 STA_KEY_FLG_INVALID;
1249
1250 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1251 key_flags |= STA_KEY_MULTICAST_MSK;
1252
1253 sta_cmd.key.key_flags = key_flags;
1254 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1255 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1256 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1257
1258 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1259 }
1260
1261 int iwl_set_dynamic_key(struct iwl_priv *priv,
1262 struct iwl_rxon_context *ctx,
1263 struct ieee80211_key_conf *keyconf,
1264 struct ieee80211_sta *sta)
1265 {
1266 struct ieee80211_key_seq seq;
1267 u16 p1k[5];
1268 int ret;
1269 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1270 const u8 *addr;
1271
1272 if (sta_id == IWL_INVALID_STATION)
1273 return -EINVAL;
1274
1275 lockdep_assert_held(&priv->mutex);
1276
1277 keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1278 if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1279 return -ENOSPC;
1280
1281 ctx->key_mapping_keys++;
1282
1283 switch (keyconf->cipher) {
1284 case WLAN_CIPHER_SUITE_TKIP:
1285 if (sta)
1286 addr = sta->addr;
1287 else /* station mode case only */
1288 addr = ctx->active.bssid_addr;
1289
1290 /* pre-fill phase 1 key into device cache */
1291 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1292 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1293 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1294 seq.tkip.iv32, p1k, CMD_SYNC);
1295 break;
1296 case WLAN_CIPHER_SUITE_CCMP:
1297 case WLAN_CIPHER_SUITE_WEP40:
1298 case WLAN_CIPHER_SUITE_WEP104:
1299 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1300 0, NULL, CMD_SYNC);
1301 break;
1302 default:
1303 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1304 ret = -EINVAL;
1305 }
1306
1307 if (ret) {
1308 ctx->key_mapping_keys--;
1309 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1310 }
1311
1312 IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1313 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1314 sta ? sta->addr : NULL, ret);
1315
1316 return ret;
1317 }
1318
1319 /**
1320 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1321 *
1322 * This adds the broadcast station into the driver's station table
1323 * and marks it driver active, so that it will be restored to the
1324 * device at the next best time.
1325 */
1326 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1327 struct iwl_rxon_context *ctx)
1328 {
1329 struct iwl_link_quality_cmd *link_cmd;
1330 u8 sta_id;
1331
1332 spin_lock_bh(&priv->sta_lock);
1333 sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1334 if (sta_id == IWL_INVALID_STATION) {
1335 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1336 spin_unlock_bh(&priv->sta_lock);
1337
1338 return -EINVAL;
1339 }
1340
1341 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1342 priv->stations[sta_id].used |= IWL_STA_BCAST;
1343 spin_unlock_bh(&priv->sta_lock);
1344
1345 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1346 if (!link_cmd) {
1347 IWL_ERR(priv,
1348 "Unable to initialize rate scaling for bcast station.\n");
1349 return -ENOMEM;
1350 }
1351
1352 spin_lock_bh(&priv->sta_lock);
1353 priv->stations[sta_id].lq = link_cmd;
1354 spin_unlock_bh(&priv->sta_lock);
1355
1356 return 0;
1357 }
1358
1359 /**
1360 * iwl_update_bcast_station - update broadcast station's LQ command
1361 *
1362 * Only used by iwlagn. Placed here to have all bcast station management
1363 * code together.
1364 */
1365 int iwl_update_bcast_station(struct iwl_priv *priv,
1366 struct iwl_rxon_context *ctx)
1367 {
1368 struct iwl_link_quality_cmd *link_cmd;
1369 u8 sta_id = ctx->bcast_sta_id;
1370
1371 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1372 if (!link_cmd) {
1373 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1374 return -ENOMEM;
1375 }
1376
1377 spin_lock_bh(&priv->sta_lock);
1378 if (priv->stations[sta_id].lq)
1379 kfree(priv->stations[sta_id].lq);
1380 else
1381 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1382 priv->stations[sta_id].lq = link_cmd;
1383 spin_unlock_bh(&priv->sta_lock);
1384
1385 return 0;
1386 }
1387
1388 int iwl_update_bcast_stations(struct iwl_priv *priv)
1389 {
1390 struct iwl_rxon_context *ctx;
1391 int ret = 0;
1392
1393 for_each_context(priv, ctx) {
1394 ret = iwl_update_bcast_station(priv, ctx);
1395 if (ret)
1396 break;
1397 }
1398
1399 return ret;
1400 }
1401
1402 /**
1403 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1404 */
1405 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1406 {
1407 struct iwl_addsta_cmd sta_cmd;
1408
1409 lockdep_assert_held(&priv->mutex);
1410
1411 /* Remove "disable" flag, to enable Tx for this TID */
1412 spin_lock_bh(&priv->sta_lock);
1413 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1414 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1415 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1416 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1417 spin_unlock_bh(&priv->sta_lock);
1418
1419 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1420 }
1421
1422 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1423 int tid, u16 ssn)
1424 {
1425 int sta_id;
1426 struct iwl_addsta_cmd sta_cmd;
1427
1428 lockdep_assert_held(&priv->mutex);
1429
1430 sta_id = iwl_sta_id(sta);
1431 if (sta_id == IWL_INVALID_STATION)
1432 return -ENXIO;
1433
1434 spin_lock_bh(&priv->sta_lock);
1435 priv->stations[sta_id].sta.station_flags_msk = 0;
1436 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1437 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1438 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1439 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1440 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1441 spin_unlock_bh(&priv->sta_lock);
1442
1443 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1444 }
1445
1446 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1447 int tid)
1448 {
1449 int sta_id;
1450 struct iwl_addsta_cmd sta_cmd;
1451
1452 lockdep_assert_held(&priv->mutex);
1453
1454 sta_id = iwl_sta_id(sta);
1455 if (sta_id == IWL_INVALID_STATION) {
1456 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1457 return -ENXIO;
1458 }
1459
1460 spin_lock_bh(&priv->sta_lock);
1461 priv->stations[sta_id].sta.station_flags_msk = 0;
1462 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1463 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1464 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1465 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1466 spin_unlock_bh(&priv->sta_lock);
1467
1468 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1469 }
1470
1471
1472
1473 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1474 {
1475 struct iwl_addsta_cmd cmd = {
1476 .mode = STA_CONTROL_MODIFY_MSK,
1477 .station_flags = STA_FLG_PWR_SAVE_MSK,
1478 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1479 .sta.sta_id = sta_id,
1480 .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK,
1481 .sleep_tx_count = cpu_to_le16(cnt),
1482 };
1483
1484 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1485 }
Linux kernel - Deliverables
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