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Merge branch 'pci/resource' into next
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / dvm / sta.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2014 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_bh(&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_bh(&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
132 if (!cmd)
133 return 0;
134
135 return iwl_process_add_sta_resp(priv, (void *)cmd->payload, pkt);
136 }
137
138 int iwl_send_add_sta(struct iwl_priv *priv,
139 struct iwl_addsta_cmd *sta, u8 flags)
140 {
141 int ret = 0;
142 struct iwl_host_cmd cmd = {
143 .id = REPLY_ADD_STA,
144 .flags = flags,
145 .data = { sta, },
146 .len = { sizeof(*sta), },
147 };
148 u8 sta_id __maybe_unused = sta->sta.sta_id;
149
150 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
151 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
152
153 if (!(flags & CMD_ASYNC)) {
154 cmd.flags |= CMD_WANT_SKB;
155 might_sleep();
156 }
157
158 ret = iwl_dvm_send_cmd(priv, &cmd);
159
160 if (ret || (flags & CMD_ASYNC))
161 return ret;
162 /*else the command was successfully sent in SYNC mode, need to free
163 * the reply page */
164
165 iwl_free_resp(&cmd);
166
167 if (cmd.handler_status)
168 IWL_ERR(priv, "%s - error in the CMD response %d", __func__,
169 cmd.handler_status);
170
171 return cmd.handler_status;
172 }
173
174 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
175 struct iwl_rxon_context *ctx,
176 struct ieee80211_sta *sta)
177 {
178 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
179 return false;
180
181 #ifdef CONFIG_IWLWIFI_DEBUGFS
182 if (priv->disable_ht40)
183 return false;
184 #endif
185
186 /* special case for RXON */
187 if (!sta)
188 return true;
189
190 return sta->bandwidth >= IEEE80211_STA_RX_BW_40;
191 }
192
193 static void iwl_sta_calc_ht_flags(struct iwl_priv *priv,
194 struct ieee80211_sta *sta,
195 struct iwl_rxon_context *ctx,
196 __le32 *flags, __le32 *mask)
197 {
198 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
199
200 *mask = STA_FLG_RTS_MIMO_PROT_MSK |
201 STA_FLG_MIMO_DIS_MSK |
202 STA_FLG_HT40_EN_MSK |
203 STA_FLG_MAX_AGG_SIZE_MSK |
204 STA_FLG_AGG_MPDU_DENSITY_MSK;
205 *flags = 0;
206
207 if (!sta || !sta_ht_inf->ht_supported)
208 return;
209
210 IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n",
211 sta->addr,
212 (sta->smps_mode == IEEE80211_SMPS_STATIC) ?
213 "static" :
214 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ?
215 "dynamic" : "disabled");
216
217 switch (sta->smps_mode) {
218 case IEEE80211_SMPS_STATIC:
219 *flags |= STA_FLG_MIMO_DIS_MSK;
220 break;
221 case IEEE80211_SMPS_DYNAMIC:
222 *flags |= STA_FLG_RTS_MIMO_PROT_MSK;
223 break;
224 case IEEE80211_SMPS_OFF:
225 break;
226 default:
227 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", sta->smps_mode);
228 break;
229 }
230
231 *flags |= cpu_to_le32(
232 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
233
234 *flags |= cpu_to_le32(
235 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
236
237 if (iwl_is_ht40_tx_allowed(priv, ctx, sta))
238 *flags |= STA_FLG_HT40_EN_MSK;
239 }
240
241 int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
242 struct ieee80211_sta *sta)
243 {
244 u8 sta_id = iwl_sta_id(sta);
245 __le32 flags, mask;
246 struct iwl_addsta_cmd cmd;
247
248 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
249 return -EINVAL;
250
251 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
252
253 spin_lock_bh(&priv->sta_lock);
254 priv->stations[sta_id].sta.station_flags &= ~mask;
255 priv->stations[sta_id].sta.station_flags |= flags;
256 spin_unlock_bh(&priv->sta_lock);
257
258 memset(&cmd, 0, sizeof(cmd));
259 cmd.mode = STA_CONTROL_MODIFY_MSK;
260 cmd.station_flags_msk = mask;
261 cmd.station_flags = flags;
262 cmd.sta.sta_id = sta_id;
263
264 return iwl_send_add_sta(priv, &cmd, CMD_SYNC);
265 }
266
267 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
268 struct ieee80211_sta *sta,
269 struct iwl_rxon_context *ctx)
270 {
271 __le32 flags, mask;
272
273 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
274
275 lockdep_assert_held(&priv->sta_lock);
276 priv->stations[index].sta.station_flags &= ~mask;
277 priv->stations[index].sta.station_flags |= flags;
278 }
279
280 /**
281 * iwl_prep_station - Prepare station information for addition
282 *
283 * should be called with sta_lock held
284 */
285 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
286 const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
287 {
288 struct iwl_station_entry *station;
289 int i;
290 u8 sta_id = IWL_INVALID_STATION;
291
292 if (is_ap)
293 sta_id = ctx->ap_sta_id;
294 else if (is_broadcast_ether_addr(addr))
295 sta_id = ctx->bcast_sta_id;
296 else
297 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
298 if (ether_addr_equal(priv->stations[i].sta.sta.addr,
299 addr)) {
300 sta_id = i;
301 break;
302 }
303
304 if (!priv->stations[i].used &&
305 sta_id == IWL_INVALID_STATION)
306 sta_id = i;
307 }
308
309 /*
310 * These two conditions have the same outcome, but keep them
311 * separate
312 */
313 if (unlikely(sta_id == IWL_INVALID_STATION))
314 return sta_id;
315
316 /*
317 * uCode is not able to deal with multiple requests to add a
318 * station. Keep track if one is in progress so that we do not send
319 * another.
320 */
321 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
322 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
323 "added.\n", sta_id);
324 return sta_id;
325 }
326
327 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
328 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
329 ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) {
330 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
331 "adding again.\n", sta_id, addr);
332 return sta_id;
333 }
334
335 station = &priv->stations[sta_id];
336 station->used = IWL_STA_DRIVER_ACTIVE;
337 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
338 sta_id, addr);
339 priv->num_stations++;
340
341 /* Set up the REPLY_ADD_STA command to send to device */
342 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
343 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
344 station->sta.mode = 0;
345 station->sta.sta.sta_id = sta_id;
346 station->sta.station_flags = ctx->station_flags;
347 station->ctxid = ctx->ctxid;
348
349 if (sta) {
350 struct iwl_station_priv *sta_priv;
351
352 sta_priv = (void *)sta->drv_priv;
353 sta_priv->ctx = ctx;
354 }
355
356 /*
357 * OK to call unconditionally, since local stations (IBSS BSSID
358 * STA and broadcast STA) pass in a NULL sta, and mac80211
359 * doesn't allow HT IBSS.
360 */
361 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
362
363 return sta_id;
364
365 }
366
367 #define STA_WAIT_TIMEOUT (HZ/2)
368
369 /**
370 * iwl_add_station_common -
371 */
372 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
373 const u8 *addr, bool is_ap,
374 struct ieee80211_sta *sta, u8 *sta_id_r)
375 {
376 int ret = 0;
377 u8 sta_id;
378 struct iwl_addsta_cmd sta_cmd;
379
380 *sta_id_r = 0;
381 spin_lock_bh(&priv->sta_lock);
382 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
383 if (sta_id == IWL_INVALID_STATION) {
384 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
385 addr);
386 spin_unlock_bh(&priv->sta_lock);
387 return -EINVAL;
388 }
389
390 /*
391 * uCode is not able to deal with multiple requests to add a
392 * station. Keep track if one is in progress so that we do not send
393 * another.
394 */
395 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
396 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
397 "added.\n", sta_id);
398 spin_unlock_bh(&priv->sta_lock);
399 return -EEXIST;
400 }
401
402 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
403 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
404 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
405 "adding again.\n", sta_id, addr);
406 spin_unlock_bh(&priv->sta_lock);
407 return -EEXIST;
408 }
409
410 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
411 memcpy(&sta_cmd, &priv->stations[sta_id].sta,
412 sizeof(struct iwl_addsta_cmd));
413 spin_unlock_bh(&priv->sta_lock);
414
415 /* Add station to device's station table */
416 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
417 if (ret) {
418 spin_lock_bh(&priv->sta_lock);
419 IWL_ERR(priv, "Adding station %pM failed.\n",
420 priv->stations[sta_id].sta.sta.addr);
421 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
422 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
423 spin_unlock_bh(&priv->sta_lock);
424 }
425 *sta_id_r = sta_id;
426 return ret;
427 }
428
429 /**
430 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
431 */
432 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
433 {
434 lockdep_assert_held(&priv->sta_lock);
435
436 /* Ucode must be active and driver must be non active */
437 if ((priv->stations[sta_id].used &
438 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
439 IWL_STA_UCODE_ACTIVE)
440 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
441
442 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
443
444 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
445 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
446 }
447
448 static int iwl_send_remove_station(struct iwl_priv *priv,
449 const u8 *addr, int sta_id,
450 bool temporary)
451 {
452 struct iwl_rx_packet *pkt;
453 int ret;
454 struct iwl_rem_sta_cmd rm_sta_cmd;
455
456 struct iwl_host_cmd cmd = {
457 .id = REPLY_REMOVE_STA,
458 .len = { sizeof(struct iwl_rem_sta_cmd), },
459 .flags = CMD_SYNC,
460 .data = { &rm_sta_cmd, },
461 };
462
463 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
464 rm_sta_cmd.num_sta = 1;
465 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
466
467 cmd.flags |= CMD_WANT_SKB;
468
469 ret = iwl_dvm_send_cmd(priv, &cmd);
470
471 if (ret)
472 return ret;
473
474 pkt = cmd.resp_pkt;
475 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
476 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
477 pkt->hdr.flags);
478 ret = -EIO;
479 }
480
481 if (!ret) {
482 struct iwl_rem_sta_resp *rem_sta_resp = (void *)pkt->data;
483 switch (rem_sta_resp->status) {
484 case REM_STA_SUCCESS_MSK:
485 if (!temporary) {
486 spin_lock_bh(&priv->sta_lock);
487 iwl_sta_ucode_deactivate(priv, sta_id);
488 spin_unlock_bh(&priv->sta_lock);
489 }
490 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
491 break;
492 default:
493 ret = -EIO;
494 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
495 break;
496 }
497 }
498 iwl_free_resp(&cmd);
499
500 return ret;
501 }
502
503 /**
504 * iwl_remove_station - Remove driver's knowledge of station.
505 */
506 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
507 const u8 *addr)
508 {
509 u8 tid;
510
511 if (!iwl_is_ready(priv)) {
512 IWL_DEBUG_INFO(priv,
513 "Unable to remove station %pM, device not ready.\n",
514 addr);
515 /*
516 * It is typical for stations to be removed when we are
517 * going down. Return success since device will be down
518 * soon anyway
519 */
520 return 0;
521 }
522
523 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
524 sta_id, addr);
525
526 if (WARN_ON(sta_id == IWL_INVALID_STATION))
527 return -EINVAL;
528
529 spin_lock_bh(&priv->sta_lock);
530
531 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
532 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
533 addr);
534 goto out_err;
535 }
536
537 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
538 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
539 addr);
540 goto out_err;
541 }
542
543 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
544 kfree(priv->stations[sta_id].lq);
545 priv->stations[sta_id].lq = NULL;
546 }
547
548 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
549 memset(&priv->tid_data[sta_id][tid], 0,
550 sizeof(priv->tid_data[sta_id][tid]));
551
552 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
553
554 priv->num_stations--;
555
556 if (WARN_ON(priv->num_stations < 0))
557 priv->num_stations = 0;
558
559 spin_unlock_bh(&priv->sta_lock);
560
561 return iwl_send_remove_station(priv, addr, sta_id, false);
562 out_err:
563 spin_unlock_bh(&priv->sta_lock);
564 return -EINVAL;
565 }
566
567 void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
568 const u8 *addr)
569 {
570 u8 tid;
571
572 if (!iwl_is_ready(priv)) {
573 IWL_DEBUG_INFO(priv,
574 "Unable to remove station %pM, device not ready.\n",
575 addr);
576 return;
577 }
578
579 IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id);
580
581 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
582 return;
583
584 spin_lock_bh(&priv->sta_lock);
585
586 WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE));
587
588 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
589 memset(&priv->tid_data[sta_id][tid], 0,
590 sizeof(priv->tid_data[sta_id][tid]));
591
592 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
593
594 priv->num_stations--;
595
596 if (WARN_ON_ONCE(priv->num_stations < 0))
597 priv->num_stations = 0;
598
599 spin_unlock_bh(&priv->sta_lock);
600 }
601
602 static void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
603 u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
604 {
605 int i, r;
606 u32 rate_flags = 0;
607 __le32 rate_n_flags;
608
609 lockdep_assert_held(&priv->mutex);
610
611 memset(link_cmd, 0, sizeof(*link_cmd));
612
613 /* Set up the rate scaling to start at selected rate, fall back
614 * all the way down to 1M in IEEE order, and then spin on 1M */
615 if (priv->band == IEEE80211_BAND_5GHZ)
616 r = IWL_RATE_6M_INDEX;
617 else if (ctx && ctx->vif && ctx->vif->p2p)
618 r = IWL_RATE_6M_INDEX;
619 else
620 r = IWL_RATE_1M_INDEX;
621
622 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
623 rate_flags |= RATE_MCS_CCK_MSK;
624
625 rate_flags |= first_antenna(priv->nvm_data->valid_tx_ant) <<
626 RATE_MCS_ANT_POS;
627 rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
628 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
629 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
630
631 link_cmd->general_params.single_stream_ant_msk =
632 first_antenna(priv->nvm_data->valid_tx_ant);
633
634 link_cmd->general_params.dual_stream_ant_msk =
635 priv->nvm_data->valid_tx_ant &
636 ~first_antenna(priv->nvm_data->valid_tx_ant);
637 if (!link_cmd->general_params.dual_stream_ant_msk) {
638 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
639 } else if (num_of_ant(priv->nvm_data->valid_tx_ant) == 2) {
640 link_cmd->general_params.dual_stream_ant_msk =
641 priv->nvm_data->valid_tx_ant;
642 }
643
644 link_cmd->agg_params.agg_dis_start_th =
645 LINK_QUAL_AGG_DISABLE_START_DEF;
646 link_cmd->agg_params.agg_time_limit =
647 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
648
649 link_cmd->sta_id = sta_id;
650 }
651
652 /**
653 * iwl_clear_ucode_stations - clear ucode station table bits
654 *
655 * This function clears all the bits in the driver indicating
656 * which stations are active in the ucode. Call when something
657 * other than explicit station management would cause this in
658 * the ucode, e.g. unassociated RXON.
659 */
660 void iwl_clear_ucode_stations(struct iwl_priv *priv,
661 struct iwl_rxon_context *ctx)
662 {
663 int i;
664 bool cleared = false;
665
666 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
667
668 spin_lock_bh(&priv->sta_lock);
669 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
670 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
671 continue;
672
673 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
674 IWL_DEBUG_INFO(priv,
675 "Clearing ucode active for station %d\n", i);
676 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
677 cleared = true;
678 }
679 }
680 spin_unlock_bh(&priv->sta_lock);
681
682 if (!cleared)
683 IWL_DEBUG_INFO(priv,
684 "No active stations found to be cleared\n");
685 }
686
687 /**
688 * iwl_restore_stations() - Restore driver known stations to device
689 *
690 * All stations considered active by driver, but not present in ucode, is
691 * restored.
692 *
693 * Function sleeps.
694 */
695 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
696 {
697 struct iwl_addsta_cmd sta_cmd;
698 static const struct iwl_link_quality_cmd zero_lq = {};
699 struct iwl_link_quality_cmd lq;
700 int i;
701 bool found = false;
702 int ret;
703 bool send_lq;
704
705 if (!iwl_is_ready(priv)) {
706 IWL_DEBUG_INFO(priv,
707 "Not ready yet, not restoring any stations.\n");
708 return;
709 }
710
711 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
712 spin_lock_bh(&priv->sta_lock);
713 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
714 if (ctx->ctxid != priv->stations[i].ctxid)
715 continue;
716 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
717 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
718 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
719 priv->stations[i].sta.sta.addr);
720 priv->stations[i].sta.mode = 0;
721 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
722 found = true;
723 }
724 }
725
726 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
727 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
728 memcpy(&sta_cmd, &priv->stations[i].sta,
729 sizeof(struct iwl_addsta_cmd));
730 send_lq = false;
731 if (priv->stations[i].lq) {
732 if (priv->wowlan)
733 iwl_sta_fill_lq(priv, ctx, i, &lq);
734 else
735 memcpy(&lq, priv->stations[i].lq,
736 sizeof(struct iwl_link_quality_cmd));
737
738 if (memcmp(&lq, &zero_lq, sizeof(lq)))
739 send_lq = true;
740 }
741 spin_unlock_bh(&priv->sta_lock);
742 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
743 if (ret) {
744 spin_lock_bh(&priv->sta_lock);
745 IWL_ERR(priv, "Adding station %pM failed.\n",
746 priv->stations[i].sta.sta.addr);
747 priv->stations[i].used &=
748 ~IWL_STA_DRIVER_ACTIVE;
749 priv->stations[i].used &=
750 ~IWL_STA_UCODE_INPROGRESS;
751 continue;
752 }
753 /*
754 * Rate scaling has already been initialized, send
755 * current LQ command
756 */
757 if (send_lq)
758 iwl_send_lq_cmd(priv, ctx, &lq,
759 CMD_SYNC, true);
760 spin_lock_bh(&priv->sta_lock);
761 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
762 }
763 }
764
765 spin_unlock_bh(&priv->sta_lock);
766 if (!found)
767 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
768 "no stations to be restored.\n");
769 else
770 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
771 "complete.\n");
772 }
773
774 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
775 {
776 int i;
777
778 for (i = 0; i < priv->sta_key_max_num; i++)
779 if (!test_and_set_bit(i, &priv->ucode_key_table))
780 return i;
781
782 return WEP_INVALID_OFFSET;
783 }
784
785 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
786 {
787 int i;
788
789 spin_lock_bh(&priv->sta_lock);
790 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
791 if (!(priv->stations[i].used & IWL_STA_BCAST))
792 continue;
793
794 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
795 priv->num_stations--;
796 if (WARN_ON(priv->num_stations < 0))
797 priv->num_stations = 0;
798 kfree(priv->stations[i].lq);
799 priv->stations[i].lq = NULL;
800 }
801 spin_unlock_bh(&priv->sta_lock);
802 }
803
804 #ifdef CONFIG_IWLWIFI_DEBUG
805 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
806 struct iwl_link_quality_cmd *lq)
807 {
808 int i;
809 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
810 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
811 lq->general_params.single_stream_ant_msk,
812 lq->general_params.dual_stream_ant_msk);
813
814 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
815 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
816 i, lq->rs_table[i].rate_n_flags);
817 }
818 #else
819 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
820 struct iwl_link_quality_cmd *lq)
821 {
822 }
823 #endif
824
825 /**
826 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
827 *
828 * It sometimes happens when a HT rate has been in use and we
829 * loose connectivity with AP then mac80211 will first tell us that the
830 * current channel is not HT anymore before removing the station. In such a
831 * scenario the RXON flags will be updated to indicate we are not
832 * communicating HT anymore, but the LQ command may still contain HT rates.
833 * Test for this to prevent driver from sending LQ command between the time
834 * RXON flags are updated and when LQ command is updated.
835 */
836 static bool is_lq_table_valid(struct iwl_priv *priv,
837 struct iwl_rxon_context *ctx,
838 struct iwl_link_quality_cmd *lq)
839 {
840 int i;
841
842 if (ctx->ht.enabled)
843 return true;
844
845 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
846 ctx->active.channel);
847 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
848 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
849 RATE_MCS_HT_MSK) {
850 IWL_DEBUG_INFO(priv,
851 "index %d of LQ expects HT channel\n",
852 i);
853 return false;
854 }
855 }
856 return true;
857 }
858
859 /**
860 * iwl_send_lq_cmd() - Send link quality command
861 * @init: This command is sent as part of station initialization right
862 * after station has been added.
863 *
864 * The link quality command is sent as the last step of station creation.
865 * This is the special case in which init is set and we call a callback in
866 * this case to clear the state indicating that station creation is in
867 * progress.
868 */
869 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
870 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
871 {
872 int ret = 0;
873 struct iwl_host_cmd cmd = {
874 .id = REPLY_TX_LINK_QUALITY_CMD,
875 .len = { sizeof(struct iwl_link_quality_cmd), },
876 .flags = flags,
877 .data = { lq, },
878 };
879
880 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
881 return -EINVAL;
882
883
884 spin_lock_bh(&priv->sta_lock);
885 if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
886 spin_unlock_bh(&priv->sta_lock);
887 return -EINVAL;
888 }
889 spin_unlock_bh(&priv->sta_lock);
890
891 iwl_dump_lq_cmd(priv, lq);
892 if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
893 return -EINVAL;
894
895 if (is_lq_table_valid(priv, ctx, lq))
896 ret = iwl_dvm_send_cmd(priv, &cmd);
897 else
898 ret = -EINVAL;
899
900 if (cmd.flags & CMD_ASYNC)
901 return ret;
902
903 if (init) {
904 IWL_DEBUG_INFO(priv, "init LQ command complete, "
905 "clearing sta addition status for sta %d\n",
906 lq->sta_id);
907 spin_lock_bh(&priv->sta_lock);
908 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
909 spin_unlock_bh(&priv->sta_lock);
910 }
911 return ret;
912 }
913
914
915 static struct iwl_link_quality_cmd *
916 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
917 u8 sta_id)
918 {
919 struct iwl_link_quality_cmd *link_cmd;
920
921 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
922 if (!link_cmd) {
923 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
924 return NULL;
925 }
926
927 iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
928
929 return link_cmd;
930 }
931
932 /*
933 * iwlagn_add_bssid_station - Add the special IBSS BSSID station
934 *
935 * Function sleeps.
936 */
937 int iwlagn_add_bssid_station(struct iwl_priv *priv,
938 struct iwl_rxon_context *ctx,
939 const u8 *addr, u8 *sta_id_r)
940 {
941 int ret;
942 u8 sta_id;
943 struct iwl_link_quality_cmd *link_cmd;
944
945 if (sta_id_r)
946 *sta_id_r = IWL_INVALID_STATION;
947
948 ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
949 if (ret) {
950 IWL_ERR(priv, "Unable to add station %pM\n", addr);
951 return ret;
952 }
953
954 if (sta_id_r)
955 *sta_id_r = sta_id;
956
957 spin_lock_bh(&priv->sta_lock);
958 priv->stations[sta_id].used |= IWL_STA_LOCAL;
959 spin_unlock_bh(&priv->sta_lock);
960
961 /* Set up default rate scaling table in device's station table */
962 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
963 if (!link_cmd) {
964 IWL_ERR(priv,
965 "Unable to initialize rate scaling for station %pM.\n",
966 addr);
967 return -ENOMEM;
968 }
969
970 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true);
971 if (ret)
972 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
973
974 spin_lock_bh(&priv->sta_lock);
975 priv->stations[sta_id].lq = link_cmd;
976 spin_unlock_bh(&priv->sta_lock);
977
978 return 0;
979 }
980
981 /*
982 * static WEP keys
983 *
984 * For each context, the device has a table of 4 static WEP keys
985 * (one for each key index) that is updated with the following
986 * commands.
987 */
988
989 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
990 struct iwl_rxon_context *ctx,
991 bool send_if_empty)
992 {
993 int i, not_empty = 0;
994 u8 buff[sizeof(struct iwl_wep_cmd) +
995 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
996 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
997 size_t cmd_size = sizeof(struct iwl_wep_cmd);
998 struct iwl_host_cmd cmd = {
999 .id = ctx->wep_key_cmd,
1000 .data = { wep_cmd, },
1001 .flags = CMD_SYNC,
1002 };
1003
1004 might_sleep();
1005
1006 memset(wep_cmd, 0, cmd_size +
1007 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
1008
1009 for (i = 0; i < WEP_KEYS_MAX ; i++) {
1010 wep_cmd->key[i].key_index = i;
1011 if (ctx->wep_keys[i].key_size) {
1012 wep_cmd->key[i].key_offset = i;
1013 not_empty = 1;
1014 } else {
1015 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
1016 }
1017
1018 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
1019 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
1020 ctx->wep_keys[i].key_size);
1021 }
1022
1023 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
1024 wep_cmd->num_keys = WEP_KEYS_MAX;
1025
1026 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
1027
1028 cmd.len[0] = cmd_size;
1029
1030 if (not_empty || send_if_empty)
1031 return iwl_dvm_send_cmd(priv, &cmd);
1032 else
1033 return 0;
1034 }
1035
1036 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
1037 struct iwl_rxon_context *ctx)
1038 {
1039 lockdep_assert_held(&priv->mutex);
1040
1041 return iwl_send_static_wepkey_cmd(priv, ctx, false);
1042 }
1043
1044 int iwl_remove_default_wep_key(struct iwl_priv *priv,
1045 struct iwl_rxon_context *ctx,
1046 struct ieee80211_key_conf *keyconf)
1047 {
1048 int ret;
1049
1050 lockdep_assert_held(&priv->mutex);
1051
1052 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1053 keyconf->keyidx);
1054
1055 memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1056 if (iwl_is_rfkill(priv)) {
1057 IWL_DEBUG_WEP(priv,
1058 "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1059 /* but keys in device are clear anyway so return success */
1060 return 0;
1061 }
1062 ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1063 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1064 keyconf->keyidx, ret);
1065
1066 return ret;
1067 }
1068
1069 int iwl_set_default_wep_key(struct iwl_priv *priv,
1070 struct iwl_rxon_context *ctx,
1071 struct ieee80211_key_conf *keyconf)
1072 {
1073 int ret;
1074
1075 lockdep_assert_held(&priv->mutex);
1076
1077 if (keyconf->keylen != WEP_KEY_LEN_128 &&
1078 keyconf->keylen != WEP_KEY_LEN_64) {
1079 IWL_DEBUG_WEP(priv,
1080 "Bad WEP key length %d\n", keyconf->keylen);
1081 return -EINVAL;
1082 }
1083
1084 keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1085
1086 ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1087 memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1088 keyconf->keylen);
1089
1090 ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1091 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1092 keyconf->keylen, keyconf->keyidx, ret);
1093
1094 return ret;
1095 }
1096
1097 /*
1098 * dynamic (per-station) keys
1099 *
1100 * The dynamic keys are a little more complicated. The device has
1101 * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1102 * These are linked to stations by a table that contains an index
1103 * into the key table for each station/key index/{mcast,unicast},
1104 * i.e. it's basically an array of pointers like this:
1105 * key_offset_t key_mapping[NUM_STATIONS][4][2];
1106 * (it really works differently, but you can think of it as such)
1107 *
1108 * The key uploading and linking happens in the same command, the
1109 * add station command with STA_MODIFY_KEY_MASK.
1110 */
1111
1112 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1113 struct ieee80211_vif *vif,
1114 struct ieee80211_sta *sta)
1115 {
1116 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1117
1118 if (sta)
1119 return iwl_sta_id(sta);
1120
1121 /*
1122 * The device expects GTKs for station interfaces to be
1123 * installed as GTKs for the AP station. If we have no
1124 * station ID, then use the ap_sta_id in that case.
1125 */
1126 if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
1127 return vif_priv->ctx->ap_sta_id;
1128
1129 return IWL_INVALID_STATION;
1130 }
1131
1132 static int iwlagn_send_sta_key(struct iwl_priv *priv,
1133 struct ieee80211_key_conf *keyconf,
1134 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1135 u32 cmd_flags)
1136 {
1137 __le16 key_flags;
1138 struct iwl_addsta_cmd sta_cmd;
1139 int i;
1140
1141 spin_lock_bh(&priv->sta_lock);
1142 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1143 spin_unlock_bh(&priv->sta_lock);
1144
1145 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1146 key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1147
1148 switch (keyconf->cipher) {
1149 case WLAN_CIPHER_SUITE_CCMP:
1150 key_flags |= STA_KEY_FLG_CCMP;
1151 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1152 break;
1153 case WLAN_CIPHER_SUITE_TKIP:
1154 key_flags |= STA_KEY_FLG_TKIP;
1155 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1156 for (i = 0; i < 5; i++)
1157 sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1158 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1159 break;
1160 case WLAN_CIPHER_SUITE_WEP104:
1161 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1162 /* fall through */
1163 case WLAN_CIPHER_SUITE_WEP40:
1164 key_flags |= STA_KEY_FLG_WEP;
1165 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1166 break;
1167 default:
1168 WARN_ON(1);
1169 return -EINVAL;
1170 }
1171
1172 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1173 key_flags |= STA_KEY_MULTICAST_MSK;
1174
1175 /* key pointer (offset) */
1176 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1177
1178 sta_cmd.key.key_flags = key_flags;
1179 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1180 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1181
1182 return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1183 }
1184
1185 void iwl_update_tkip_key(struct iwl_priv *priv,
1186 struct ieee80211_vif *vif,
1187 struct ieee80211_key_conf *keyconf,
1188 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1189 {
1190 u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1191
1192 if (sta_id == IWL_INVALID_STATION)
1193 return;
1194
1195 if (iwl_scan_cancel(priv)) {
1196 /* cancel scan failed, just live w/ bad key and rely
1197 briefly on SW decryption */
1198 return;
1199 }
1200
1201 iwlagn_send_sta_key(priv, keyconf, sta_id,
1202 iv32, phase1key, CMD_ASYNC);
1203 }
1204
1205 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1206 struct iwl_rxon_context *ctx,
1207 struct ieee80211_key_conf *keyconf,
1208 struct ieee80211_sta *sta)
1209 {
1210 struct iwl_addsta_cmd sta_cmd;
1211 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1212 __le16 key_flags;
1213
1214 /* if station isn't there, neither is the key */
1215 if (sta_id == IWL_INVALID_STATION)
1216 return -ENOENT;
1217
1218 spin_lock_bh(&priv->sta_lock);
1219 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1220 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1221 sta_id = IWL_INVALID_STATION;
1222 spin_unlock_bh(&priv->sta_lock);
1223
1224 if (sta_id == IWL_INVALID_STATION)
1225 return 0;
1226
1227 lockdep_assert_held(&priv->mutex);
1228
1229 ctx->key_mapping_keys--;
1230
1231 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1232 keyconf->keyidx, sta_id);
1233
1234 if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1235 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1236 keyconf->hw_key_idx);
1237
1238 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1239 key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
1240 STA_KEY_FLG_INVALID;
1241
1242 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1243 key_flags |= STA_KEY_MULTICAST_MSK;
1244
1245 sta_cmd.key.key_flags = key_flags;
1246 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1247 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1248 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1249
1250 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1251 }
1252
1253 int iwl_set_dynamic_key(struct iwl_priv *priv,
1254 struct iwl_rxon_context *ctx,
1255 struct ieee80211_key_conf *keyconf,
1256 struct ieee80211_sta *sta)
1257 {
1258 struct ieee80211_key_seq seq;
1259 u16 p1k[5];
1260 int ret;
1261 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1262 const u8 *addr;
1263
1264 if (sta_id == IWL_INVALID_STATION)
1265 return -EINVAL;
1266
1267 lockdep_assert_held(&priv->mutex);
1268
1269 keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1270 if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1271 return -ENOSPC;
1272
1273 ctx->key_mapping_keys++;
1274
1275 switch (keyconf->cipher) {
1276 case WLAN_CIPHER_SUITE_TKIP:
1277 if (sta)
1278 addr = sta->addr;
1279 else /* station mode case only */
1280 addr = ctx->active.bssid_addr;
1281
1282 /* pre-fill phase 1 key into device cache */
1283 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1284 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1285 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1286 seq.tkip.iv32, p1k, CMD_SYNC);
1287 break;
1288 case WLAN_CIPHER_SUITE_CCMP:
1289 case WLAN_CIPHER_SUITE_WEP40:
1290 case WLAN_CIPHER_SUITE_WEP104:
1291 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1292 0, NULL, CMD_SYNC);
1293 break;
1294 default:
1295 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1296 ret = -EINVAL;
1297 }
1298
1299 if (ret) {
1300 ctx->key_mapping_keys--;
1301 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1302 }
1303
1304 IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1305 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1306 sta ? sta->addr : NULL, ret);
1307
1308 return ret;
1309 }
1310
1311 /**
1312 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1313 *
1314 * This adds the broadcast station into the driver's station table
1315 * and marks it driver active, so that it will be restored to the
1316 * device at the next best time.
1317 */
1318 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1319 struct iwl_rxon_context *ctx)
1320 {
1321 struct iwl_link_quality_cmd *link_cmd;
1322 u8 sta_id;
1323
1324 spin_lock_bh(&priv->sta_lock);
1325 sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1326 if (sta_id == IWL_INVALID_STATION) {
1327 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1328 spin_unlock_bh(&priv->sta_lock);
1329
1330 return -EINVAL;
1331 }
1332
1333 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1334 priv->stations[sta_id].used |= IWL_STA_BCAST;
1335 spin_unlock_bh(&priv->sta_lock);
1336
1337 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1338 if (!link_cmd) {
1339 IWL_ERR(priv,
1340 "Unable to initialize rate scaling for bcast station.\n");
1341 return -ENOMEM;
1342 }
1343
1344 spin_lock_bh(&priv->sta_lock);
1345 priv->stations[sta_id].lq = link_cmd;
1346 spin_unlock_bh(&priv->sta_lock);
1347
1348 return 0;
1349 }
1350
1351 /**
1352 * iwl_update_bcast_station - update broadcast station's LQ command
1353 *
1354 * Only used by iwlagn. Placed here to have all bcast station management
1355 * code together.
1356 */
1357 int iwl_update_bcast_station(struct iwl_priv *priv,
1358 struct iwl_rxon_context *ctx)
1359 {
1360 struct iwl_link_quality_cmd *link_cmd;
1361 u8 sta_id = ctx->bcast_sta_id;
1362
1363 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1364 if (!link_cmd) {
1365 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1366 return -ENOMEM;
1367 }
1368
1369 spin_lock_bh(&priv->sta_lock);
1370 if (priv->stations[sta_id].lq)
1371 kfree(priv->stations[sta_id].lq);
1372 else
1373 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1374 priv->stations[sta_id].lq = link_cmd;
1375 spin_unlock_bh(&priv->sta_lock);
1376
1377 return 0;
1378 }
1379
1380 int iwl_update_bcast_stations(struct iwl_priv *priv)
1381 {
1382 struct iwl_rxon_context *ctx;
1383 int ret = 0;
1384
1385 for_each_context(priv, ctx) {
1386 ret = iwl_update_bcast_station(priv, ctx);
1387 if (ret)
1388 break;
1389 }
1390
1391 return ret;
1392 }
1393
1394 /**
1395 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1396 */
1397 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1398 {
1399 struct iwl_addsta_cmd sta_cmd;
1400
1401 lockdep_assert_held(&priv->mutex);
1402
1403 /* Remove "disable" flag, to enable Tx for this TID */
1404 spin_lock_bh(&priv->sta_lock);
1405 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1406 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1407 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1408 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1409 spin_unlock_bh(&priv->sta_lock);
1410
1411 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1412 }
1413
1414 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1415 int tid, u16 ssn)
1416 {
1417 int sta_id;
1418 struct iwl_addsta_cmd sta_cmd;
1419
1420 lockdep_assert_held(&priv->mutex);
1421
1422 sta_id = iwl_sta_id(sta);
1423 if (sta_id == IWL_INVALID_STATION)
1424 return -ENXIO;
1425
1426 spin_lock_bh(&priv->sta_lock);
1427 priv->stations[sta_id].sta.station_flags_msk = 0;
1428 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1429 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1430 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1431 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1432 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1433 spin_unlock_bh(&priv->sta_lock);
1434
1435 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1436 }
1437
1438 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1439 int tid)
1440 {
1441 int sta_id;
1442 struct iwl_addsta_cmd sta_cmd;
1443
1444 lockdep_assert_held(&priv->mutex);
1445
1446 sta_id = iwl_sta_id(sta);
1447 if (sta_id == IWL_INVALID_STATION) {
1448 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1449 return -ENXIO;
1450 }
1451
1452 spin_lock_bh(&priv->sta_lock);
1453 priv->stations[sta_id].sta.station_flags_msk = 0;
1454 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1455 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1456 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1457 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1458 spin_unlock_bh(&priv->sta_lock);
1459
1460 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1461 }
1462
1463
1464
1465 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1466 {
1467 struct iwl_addsta_cmd cmd = {
1468 .mode = STA_CONTROL_MODIFY_MSK,
1469 .station_flags = STA_FLG_PWR_SAVE_MSK,
1470 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1471 .sta.sta_id = sta_id,
1472 .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK,
1473 .sleep_tx_count = cpu_to_le16(cnt),
1474 };
1475
1476 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1477 }
Linux kernel - Deliverables
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