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drivers/net: Convert compare_ether_addr to ether_addr_equal
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn-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
32 #include "iwl-dev.h"
33 #include "iwl-agn.h"
34 #include "iwl-trans.h"
35
36 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
37
38 static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
39 {
40 lockdep_assert_held(&priv->sta_lock);
41
42 if (sta_id >= IWLAGN_STATION_COUNT) {
43 IWL_ERR(priv, "invalid sta_id %u", sta_id);
44 return -EINVAL;
45 }
46 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
47 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
48 "addr %pM\n",
49 sta_id, priv->stations[sta_id].sta.sta.addr);
50
51 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
52 IWL_DEBUG_ASSOC(priv,
53 "STA id %u addr %pM already present in uCode "
54 "(according to driver)\n",
55 sta_id, priv->stations[sta_id].sta.sta.addr);
56 } else {
57 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
58 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
59 sta_id, priv->stations[sta_id].sta.sta.addr);
60 }
61 return 0;
62 }
63
64 static int iwl_process_add_sta_resp(struct iwl_priv *priv,
65 struct iwl_addsta_cmd *addsta,
66 struct iwl_rx_packet *pkt)
67 {
68 struct iwl_add_sta_resp *add_sta_resp = (void *)pkt->data;
69 u8 sta_id = addsta->sta.sta_id;
70 int ret = -EIO;
71
72 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
73 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
74 pkt->hdr.flags);
75 return ret;
76 }
77
78 IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
79 sta_id);
80
81 spin_lock(&priv->sta_lock);
82
83 switch (add_sta_resp->status) {
84 case ADD_STA_SUCCESS_MSK:
85 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
86 ret = iwl_sta_ucode_activate(priv, sta_id);
87 break;
88 case ADD_STA_NO_ROOM_IN_TABLE:
89 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
90 sta_id);
91 break;
92 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
93 IWL_ERR(priv, "Adding station %d failed, no block ack "
94 "resource.\n", sta_id);
95 break;
96 case ADD_STA_MODIFY_NON_EXIST_STA:
97 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
98 sta_id);
99 break;
100 default:
101 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
102 add_sta_resp->status);
103 break;
104 }
105
106 IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
107 priv->stations[sta_id].sta.mode ==
108 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
109 sta_id, priv->stations[sta_id].sta.sta.addr);
110
111 /*
112 * XXX: The MAC address in the command buffer is often changed from
113 * the original sent to the device. That is, the MAC address
114 * written to the command buffer often is not the same MAC address
115 * read from the command buffer when the command returns. This
116 * issue has not yet been resolved and this debugging is left to
117 * observe the problem.
118 */
119 IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
120 priv->stations[sta_id].sta.mode ==
121 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
122 addsta->sta.addr);
123 spin_unlock(&priv->sta_lock);
124
125 return ret;
126 }
127
128 int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
129 struct iwl_device_cmd *cmd)
130 {
131 struct iwl_rx_packet *pkt = rxb_addr(rxb);
132 struct iwl_addsta_cmd *addsta =
133 (struct iwl_addsta_cmd *) cmd->payload;
134
135 return iwl_process_add_sta_resp(priv, addsta, 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 static bool iwl_is_channel_extension(struct iwl_priv *priv,
175 enum ieee80211_band band,
176 u16 channel, u8 extension_chan_offset)
177 {
178 const struct iwl_channel_info *ch_info;
179
180 ch_info = iwl_get_channel_info(priv, band, channel);
181 if (!is_channel_valid(ch_info))
182 return false;
183
184 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
185 return !(ch_info->ht40_extension_channel &
186 IEEE80211_CHAN_NO_HT40PLUS);
187 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
188 return !(ch_info->ht40_extension_channel &
189 IEEE80211_CHAN_NO_HT40MINUS);
190
191 return false;
192 }
193
194 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
195 struct iwl_rxon_context *ctx,
196 struct ieee80211_sta_ht_cap *ht_cap)
197 {
198 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
199 return false;
200
201 /*
202 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
203 * the bit will not set if it is pure 40MHz case
204 */
205 if (ht_cap && !ht_cap->ht_supported)
206 return false;
207
208 #ifdef CONFIG_IWLWIFI_DEBUGFS
209 if (priv->disable_ht40)
210 return false;
211 #endif
212
213 return iwl_is_channel_extension(priv, priv->band,
214 le16_to_cpu(ctx->staging.channel),
215 ctx->ht.extension_chan_offset);
216 }
217
218 static void iwl_sta_calc_ht_flags(struct iwl_priv *priv,
219 struct ieee80211_sta *sta,
220 struct iwl_rxon_context *ctx,
221 __le32 *flags, __le32 *mask)
222 {
223 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
224 u8 mimo_ps_mode;
225
226 *mask = STA_FLG_RTS_MIMO_PROT_MSK |
227 STA_FLG_MIMO_DIS_MSK |
228 STA_FLG_HT40_EN_MSK |
229 STA_FLG_MAX_AGG_SIZE_MSK |
230 STA_FLG_AGG_MPDU_DENSITY_MSK;
231 *flags = 0;
232
233 if (!sta || !sta_ht_inf->ht_supported)
234 return;
235
236 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
237
238 IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n",
239 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
240 "static" :
241 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
242 "dynamic" : "disabled");
243
244 switch (mimo_ps_mode) {
245 case WLAN_HT_CAP_SM_PS_STATIC:
246 *flags |= STA_FLG_MIMO_DIS_MSK;
247 break;
248 case WLAN_HT_CAP_SM_PS_DYNAMIC:
249 *flags |= STA_FLG_RTS_MIMO_PROT_MSK;
250 break;
251 case WLAN_HT_CAP_SM_PS_DISABLED:
252 break;
253 default:
254 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
255 break;
256 }
257
258 *flags |= cpu_to_le32(
259 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
260
261 *flags |= cpu_to_le32(
262 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
263
264 if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
265 *flags |= STA_FLG_HT40_EN_MSK;
266 }
267
268 int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
269 struct ieee80211_sta *sta)
270 {
271 u8 sta_id = iwl_sta_id(sta);
272 __le32 flags, mask;
273 struct iwl_addsta_cmd cmd;
274
275 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
276 return -EINVAL;
277
278 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
279
280 spin_lock_bh(&priv->sta_lock);
281 priv->stations[sta_id].sta.station_flags &= ~mask;
282 priv->stations[sta_id].sta.station_flags |= flags;
283 spin_unlock_bh(&priv->sta_lock);
284
285 memset(&cmd, 0, sizeof(cmd));
286 cmd.mode = STA_CONTROL_MODIFY_MSK;
287 cmd.station_flags_msk = mask;
288 cmd.station_flags = flags;
289 cmd.sta.sta_id = sta_id;
290
291 return iwl_send_add_sta(priv, &cmd, CMD_SYNC);
292 }
293
294 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
295 struct ieee80211_sta *sta,
296 struct iwl_rxon_context *ctx)
297 {
298 __le32 flags, mask;
299
300 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
301
302 lockdep_assert_held(&priv->sta_lock);
303 priv->stations[index].sta.station_flags &= ~mask;
304 priv->stations[index].sta.station_flags |= flags;
305 }
306
307 /**
308 * iwl_prep_station - Prepare station information for addition
309 *
310 * should be called with sta_lock held
311 */
312 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
313 const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
314 {
315 struct iwl_station_entry *station;
316 int i;
317 u8 sta_id = IWL_INVALID_STATION;
318
319 if (is_ap)
320 sta_id = ctx->ap_sta_id;
321 else if (is_broadcast_ether_addr(addr))
322 sta_id = ctx->bcast_sta_id;
323 else
324 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
325 if (ether_addr_equal(priv->stations[i].sta.sta.addr,
326 addr)) {
327 sta_id = i;
328 break;
329 }
330
331 if (!priv->stations[i].used &&
332 sta_id == IWL_INVALID_STATION)
333 sta_id = i;
334 }
335
336 /*
337 * These two conditions have the same outcome, but keep them
338 * separate
339 */
340 if (unlikely(sta_id == IWL_INVALID_STATION))
341 return sta_id;
342
343 /*
344 * uCode is not able to deal with multiple requests to add a
345 * station. Keep track if one is in progress so that we do not send
346 * another.
347 */
348 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
349 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
350 "added.\n", sta_id);
351 return sta_id;
352 }
353
354 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
355 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
356 ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) {
357 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
358 "adding again.\n", sta_id, addr);
359 return sta_id;
360 }
361
362 station = &priv->stations[sta_id];
363 station->used = IWL_STA_DRIVER_ACTIVE;
364 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
365 sta_id, addr);
366 priv->num_stations++;
367
368 /* Set up the REPLY_ADD_STA command to send to device */
369 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
370 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
371 station->sta.mode = 0;
372 station->sta.sta.sta_id = sta_id;
373 station->sta.station_flags = ctx->station_flags;
374 station->ctxid = ctx->ctxid;
375
376 if (sta) {
377 struct iwl_station_priv *sta_priv;
378
379 sta_priv = (void *)sta->drv_priv;
380 sta_priv->ctx = ctx;
381 }
382
383 /*
384 * OK to call unconditionally, since local stations (IBSS BSSID
385 * STA and broadcast STA) pass in a NULL sta, and mac80211
386 * doesn't allow HT IBSS.
387 */
388 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
389
390 return sta_id;
391
392 }
393
394 #define STA_WAIT_TIMEOUT (HZ/2)
395
396 /**
397 * iwl_add_station_common -
398 */
399 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
400 const u8 *addr, bool is_ap,
401 struct ieee80211_sta *sta, u8 *sta_id_r)
402 {
403 int ret = 0;
404 u8 sta_id;
405 struct iwl_addsta_cmd sta_cmd;
406
407 *sta_id_r = 0;
408 spin_lock_bh(&priv->sta_lock);
409 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
410 if (sta_id == IWL_INVALID_STATION) {
411 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
412 addr);
413 spin_unlock_bh(&priv->sta_lock);
414 return -EINVAL;
415 }
416
417 /*
418 * uCode is not able to deal with multiple requests to add a
419 * station. Keep track if one is in progress so that we do not send
420 * another.
421 */
422 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
423 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
424 "added.\n", sta_id);
425 spin_unlock_bh(&priv->sta_lock);
426 return -EEXIST;
427 }
428
429 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
430 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
431 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
432 "adding again.\n", sta_id, addr);
433 spin_unlock_bh(&priv->sta_lock);
434 return -EEXIST;
435 }
436
437 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
438 memcpy(&sta_cmd, &priv->stations[sta_id].sta,
439 sizeof(struct iwl_addsta_cmd));
440 spin_unlock_bh(&priv->sta_lock);
441
442 /* Add station to device's station table */
443 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
444 if (ret) {
445 spin_lock_bh(&priv->sta_lock);
446 IWL_ERR(priv, "Adding station %pM failed.\n",
447 priv->stations[sta_id].sta.sta.addr);
448 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
449 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
450 spin_unlock_bh(&priv->sta_lock);
451 }
452 *sta_id_r = sta_id;
453 return ret;
454 }
455
456 /**
457 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
458 */
459 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
460 {
461 lockdep_assert_held(&priv->sta_lock);
462
463 /* Ucode must be active and driver must be non active */
464 if ((priv->stations[sta_id].used &
465 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
466 IWL_STA_UCODE_ACTIVE)
467 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
468
469 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
470
471 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
472 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
473 }
474
475 static int iwl_send_remove_station(struct iwl_priv *priv,
476 const u8 *addr, int sta_id,
477 bool temporary)
478 {
479 struct iwl_rx_packet *pkt;
480 int ret;
481 struct iwl_rem_sta_cmd rm_sta_cmd;
482
483 struct iwl_host_cmd cmd = {
484 .id = REPLY_REMOVE_STA,
485 .len = { sizeof(struct iwl_rem_sta_cmd), },
486 .flags = CMD_SYNC,
487 .data = { &rm_sta_cmd, },
488 };
489
490 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
491 rm_sta_cmd.num_sta = 1;
492 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
493
494 cmd.flags |= CMD_WANT_SKB;
495
496 ret = iwl_dvm_send_cmd(priv, &cmd);
497
498 if (ret)
499 return ret;
500
501 pkt = cmd.resp_pkt;
502 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
503 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
504 pkt->hdr.flags);
505 ret = -EIO;
506 }
507
508 if (!ret) {
509 struct iwl_rem_sta_resp *rem_sta_resp = (void *)pkt->data;
510 switch (rem_sta_resp->status) {
511 case REM_STA_SUCCESS_MSK:
512 if (!temporary) {
513 spin_lock_bh(&priv->sta_lock);
514 iwl_sta_ucode_deactivate(priv, sta_id);
515 spin_unlock_bh(&priv->sta_lock);
516 }
517 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
518 break;
519 default:
520 ret = -EIO;
521 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
522 break;
523 }
524 }
525 iwl_free_resp(&cmd);
526
527 return ret;
528 }
529
530 /**
531 * iwl_remove_station - Remove driver's knowledge of station.
532 */
533 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
534 const u8 *addr)
535 {
536 u8 tid;
537
538 if (!iwl_is_ready(priv)) {
539 IWL_DEBUG_INFO(priv,
540 "Unable to remove station %pM, device not ready.\n",
541 addr);
542 /*
543 * It is typical for stations to be removed when we are
544 * going down. Return success since device will be down
545 * soon anyway
546 */
547 return 0;
548 }
549
550 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
551 sta_id, addr);
552
553 if (WARN_ON(sta_id == IWL_INVALID_STATION))
554 return -EINVAL;
555
556 spin_lock_bh(&priv->sta_lock);
557
558 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
559 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
560 addr);
561 goto out_err;
562 }
563
564 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
565 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
566 addr);
567 goto out_err;
568 }
569
570 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
571 kfree(priv->stations[sta_id].lq);
572 priv->stations[sta_id].lq = NULL;
573 }
574
575 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
576 memset(&priv->tid_data[sta_id][tid], 0,
577 sizeof(priv->tid_data[sta_id][tid]));
578
579 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
580
581 priv->num_stations--;
582
583 if (WARN_ON(priv->num_stations < 0))
584 priv->num_stations = 0;
585
586 spin_unlock_bh(&priv->sta_lock);
587
588 return iwl_send_remove_station(priv, addr, sta_id, false);
589 out_err:
590 spin_unlock_bh(&priv->sta_lock);
591 return -EINVAL;
592 }
593
594 void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
595 const u8 *addr)
596 {
597 u8 tid;
598
599 if (!iwl_is_ready(priv)) {
600 IWL_DEBUG_INFO(priv,
601 "Unable to remove station %pM, device not ready.\n",
602 addr);
603 return;
604 }
605
606 IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id);
607
608 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
609 return;
610
611 spin_lock_bh(&priv->sta_lock);
612
613 WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE));
614
615 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
616 memset(&priv->tid_data[sta_id][tid], 0,
617 sizeof(priv->tid_data[sta_id][tid]));
618
619 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
620
621 priv->num_stations--;
622
623 if (WARN_ON_ONCE(priv->num_stations < 0))
624 priv->num_stations = 0;
625
626 spin_unlock_bh(&priv->sta_lock);
627 }
628
629 static void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
630 u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
631 {
632 int i, r;
633 u32 rate_flags = 0;
634 __le32 rate_n_flags;
635
636 lockdep_assert_held(&priv->mutex);
637
638 memset(link_cmd, 0, sizeof(*link_cmd));
639
640 /* Set up the rate scaling to start at selected rate, fall back
641 * all the way down to 1M in IEEE order, and then spin on 1M */
642 if (priv->band == IEEE80211_BAND_5GHZ)
643 r = IWL_RATE_6M_INDEX;
644 else if (ctx && ctx->vif && ctx->vif->p2p)
645 r = IWL_RATE_6M_INDEX;
646 else
647 r = IWL_RATE_1M_INDEX;
648
649 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
650 rate_flags |= RATE_MCS_CCK_MSK;
651
652 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
653 RATE_MCS_ANT_POS;
654 rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
655 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
656 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
657
658 link_cmd->general_params.single_stream_ant_msk =
659 first_antenna(priv->hw_params.valid_tx_ant);
660
661 link_cmd->general_params.dual_stream_ant_msk =
662 priv->hw_params.valid_tx_ant &
663 ~first_antenna(priv->hw_params.valid_tx_ant);
664 if (!link_cmd->general_params.dual_stream_ant_msk) {
665 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
666 } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) {
667 link_cmd->general_params.dual_stream_ant_msk =
668 priv->hw_params.valid_tx_ant;
669 }
670
671 link_cmd->agg_params.agg_dis_start_th =
672 LINK_QUAL_AGG_DISABLE_START_DEF;
673 link_cmd->agg_params.agg_time_limit =
674 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
675
676 link_cmd->sta_id = sta_id;
677 }
678
679 /**
680 * iwl_clear_ucode_stations - clear ucode station table bits
681 *
682 * This function clears all the bits in the driver indicating
683 * which stations are active in the ucode. Call when something
684 * other than explicit station management would cause this in
685 * the ucode, e.g. unassociated RXON.
686 */
687 void iwl_clear_ucode_stations(struct iwl_priv *priv,
688 struct iwl_rxon_context *ctx)
689 {
690 int i;
691 bool cleared = false;
692
693 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
694
695 spin_lock_bh(&priv->sta_lock);
696 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
697 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
698 continue;
699
700 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
701 IWL_DEBUG_INFO(priv,
702 "Clearing ucode active for station %d\n", i);
703 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
704 cleared = true;
705 }
706 }
707 spin_unlock_bh(&priv->sta_lock);
708
709 if (!cleared)
710 IWL_DEBUG_INFO(priv,
711 "No active stations found to be cleared\n");
712 }
713
714 /**
715 * iwl_restore_stations() - Restore driver known stations to device
716 *
717 * All stations considered active by driver, but not present in ucode, is
718 * restored.
719 *
720 * Function sleeps.
721 */
722 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
723 {
724 struct iwl_addsta_cmd sta_cmd;
725 struct iwl_link_quality_cmd lq;
726 int i;
727 bool found = false;
728 int ret;
729 bool send_lq;
730
731 if (!iwl_is_ready(priv)) {
732 IWL_DEBUG_INFO(priv,
733 "Not ready yet, not restoring any stations.\n");
734 return;
735 }
736
737 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
738 spin_lock_bh(&priv->sta_lock);
739 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
740 if (ctx->ctxid != priv->stations[i].ctxid)
741 continue;
742 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
743 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
744 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
745 priv->stations[i].sta.sta.addr);
746 priv->stations[i].sta.mode = 0;
747 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
748 found = true;
749 }
750 }
751
752 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
753 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
754 memcpy(&sta_cmd, &priv->stations[i].sta,
755 sizeof(struct iwl_addsta_cmd));
756 send_lq = false;
757 if (priv->stations[i].lq) {
758 if (priv->wowlan)
759 iwl_sta_fill_lq(priv, ctx, i, &lq);
760 else
761 memcpy(&lq, priv->stations[i].lq,
762 sizeof(struct iwl_link_quality_cmd));
763 send_lq = true;
764 }
765 spin_unlock_bh(&priv->sta_lock);
766 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
767 if (ret) {
768 spin_lock_bh(&priv->sta_lock);
769 IWL_ERR(priv, "Adding station %pM failed.\n",
770 priv->stations[i].sta.sta.addr);
771 priv->stations[i].used &=
772 ~IWL_STA_DRIVER_ACTIVE;
773 priv->stations[i].used &=
774 ~IWL_STA_UCODE_INPROGRESS;
775 spin_unlock_bh(&priv->sta_lock);
776 }
777 /*
778 * Rate scaling has already been initialized, send
779 * current LQ command
780 */
781 if (send_lq)
782 iwl_send_lq_cmd(priv, ctx, &lq,
783 CMD_SYNC, true);
784 spin_lock_bh(&priv->sta_lock);
785 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
786 }
787 }
788
789 spin_unlock_bh(&priv->sta_lock);
790 if (!found)
791 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
792 "no stations to be restored.\n");
793 else
794 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
795 "complete.\n");
796 }
797
798 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
799 {
800 int i;
801
802 for (i = 0; i < priv->sta_key_max_num; i++)
803 if (!test_and_set_bit(i, &priv->ucode_key_table))
804 return i;
805
806 return WEP_INVALID_OFFSET;
807 }
808
809 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
810 {
811 int i;
812
813 spin_lock_bh(&priv->sta_lock);
814 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
815 if (!(priv->stations[i].used & IWL_STA_BCAST))
816 continue;
817
818 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
819 priv->num_stations--;
820 if (WARN_ON(priv->num_stations < 0))
821 priv->num_stations = 0;
822 kfree(priv->stations[i].lq);
823 priv->stations[i].lq = NULL;
824 }
825 spin_unlock_bh(&priv->sta_lock);
826 }
827
828 #ifdef CONFIG_IWLWIFI_DEBUG
829 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
830 struct iwl_link_quality_cmd *lq)
831 {
832 int i;
833 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
834 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
835 lq->general_params.single_stream_ant_msk,
836 lq->general_params.dual_stream_ant_msk);
837
838 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
839 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
840 i, lq->rs_table[i].rate_n_flags);
841 }
842 #else
843 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
844 struct iwl_link_quality_cmd *lq)
845 {
846 }
847 #endif
848
849 /**
850 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
851 *
852 * It sometimes happens when a HT rate has been in use and we
853 * loose connectivity with AP then mac80211 will first tell us that the
854 * current channel is not HT anymore before removing the station. In such a
855 * scenario the RXON flags will be updated to indicate we are not
856 * communicating HT anymore, but the LQ command may still contain HT rates.
857 * Test for this to prevent driver from sending LQ command between the time
858 * RXON flags are updated and when LQ command is updated.
859 */
860 static bool is_lq_table_valid(struct iwl_priv *priv,
861 struct iwl_rxon_context *ctx,
862 struct iwl_link_quality_cmd *lq)
863 {
864 int i;
865
866 if (ctx->ht.enabled)
867 return true;
868
869 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
870 ctx->active.channel);
871 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
872 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
873 RATE_MCS_HT_MSK) {
874 IWL_DEBUG_INFO(priv,
875 "index %d of LQ expects HT channel\n",
876 i);
877 return false;
878 }
879 }
880 return true;
881 }
882
883 /**
884 * iwl_send_lq_cmd() - Send link quality command
885 * @init: This command is sent as part of station initialization right
886 * after station has been added.
887 *
888 * The link quality command is sent as the last step of station creation.
889 * This is the special case in which init is set and we call a callback in
890 * this case to clear the state indicating that station creation is in
891 * progress.
892 */
893 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
894 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
895 {
896 int ret = 0;
897 struct iwl_host_cmd cmd = {
898 .id = REPLY_TX_LINK_QUALITY_CMD,
899 .len = { sizeof(struct iwl_link_quality_cmd), },
900 .flags = flags,
901 .data = { lq, },
902 };
903
904 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
905 return -EINVAL;
906
907
908 spin_lock_bh(&priv->sta_lock);
909 if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
910 spin_unlock_bh(&priv->sta_lock);
911 return -EINVAL;
912 }
913 spin_unlock_bh(&priv->sta_lock);
914
915 iwl_dump_lq_cmd(priv, lq);
916 if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
917 return -EINVAL;
918
919 if (is_lq_table_valid(priv, ctx, lq))
920 ret = iwl_dvm_send_cmd(priv, &cmd);
921 else
922 ret = -EINVAL;
923
924 if (cmd.flags & CMD_ASYNC)
925 return ret;
926
927 if (init) {
928 IWL_DEBUG_INFO(priv, "init LQ command complete, "
929 "clearing sta addition status for sta %d\n",
930 lq->sta_id);
931 spin_lock_bh(&priv->sta_lock);
932 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
933 spin_unlock_bh(&priv->sta_lock);
934 }
935 return ret;
936 }
937
938
939 static struct iwl_link_quality_cmd *
940 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
941 u8 sta_id)
942 {
943 struct iwl_link_quality_cmd *link_cmd;
944
945 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
946 if (!link_cmd) {
947 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
948 return NULL;
949 }
950
951 iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
952
953 return link_cmd;
954 }
955
956 /*
957 * iwlagn_add_bssid_station - Add the special IBSS BSSID station
958 *
959 * Function sleeps.
960 */
961 int iwlagn_add_bssid_station(struct iwl_priv *priv,
962 struct iwl_rxon_context *ctx,
963 const u8 *addr, u8 *sta_id_r)
964 {
965 int ret;
966 u8 sta_id;
967 struct iwl_link_quality_cmd *link_cmd;
968
969 if (sta_id_r)
970 *sta_id_r = IWL_INVALID_STATION;
971
972 ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
973 if (ret) {
974 IWL_ERR(priv, "Unable to add station %pM\n", addr);
975 return ret;
976 }
977
978 if (sta_id_r)
979 *sta_id_r = sta_id;
980
981 spin_lock_bh(&priv->sta_lock);
982 priv->stations[sta_id].used |= IWL_STA_LOCAL;
983 spin_unlock_bh(&priv->sta_lock);
984
985 /* Set up default rate scaling table in device's station table */
986 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
987 if (!link_cmd) {
988 IWL_ERR(priv,
989 "Unable to initialize rate scaling for station %pM.\n",
990 addr);
991 return -ENOMEM;
992 }
993
994 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true);
995 if (ret)
996 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
997
998 spin_lock_bh(&priv->sta_lock);
999 priv->stations[sta_id].lq = link_cmd;
1000 spin_unlock_bh(&priv->sta_lock);
1001
1002 return 0;
1003 }
1004
1005 /*
1006 * static WEP keys
1007 *
1008 * For each context, the device has a table of 4 static WEP keys
1009 * (one for each key index) that is updated with the following
1010 * commands.
1011 */
1012
1013 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
1014 struct iwl_rxon_context *ctx,
1015 bool send_if_empty)
1016 {
1017 int i, not_empty = 0;
1018 u8 buff[sizeof(struct iwl_wep_cmd) +
1019 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
1020 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
1021 size_t cmd_size = sizeof(struct iwl_wep_cmd);
1022 struct iwl_host_cmd cmd = {
1023 .id = ctx->wep_key_cmd,
1024 .data = { wep_cmd, },
1025 .flags = CMD_SYNC,
1026 };
1027
1028 might_sleep();
1029
1030 memset(wep_cmd, 0, cmd_size +
1031 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
1032
1033 for (i = 0; i < WEP_KEYS_MAX ; i++) {
1034 wep_cmd->key[i].key_index = i;
1035 if (ctx->wep_keys[i].key_size) {
1036 wep_cmd->key[i].key_offset = i;
1037 not_empty = 1;
1038 } else {
1039 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
1040 }
1041
1042 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
1043 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
1044 ctx->wep_keys[i].key_size);
1045 }
1046
1047 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
1048 wep_cmd->num_keys = WEP_KEYS_MAX;
1049
1050 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
1051
1052 cmd.len[0] = cmd_size;
1053
1054 if (not_empty || send_if_empty)
1055 return iwl_dvm_send_cmd(priv, &cmd);
1056 else
1057 return 0;
1058 }
1059
1060 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
1061 struct iwl_rxon_context *ctx)
1062 {
1063 lockdep_assert_held(&priv->mutex);
1064
1065 return iwl_send_static_wepkey_cmd(priv, ctx, false);
1066 }
1067
1068 int iwl_remove_default_wep_key(struct iwl_priv *priv,
1069 struct iwl_rxon_context *ctx,
1070 struct ieee80211_key_conf *keyconf)
1071 {
1072 int ret;
1073
1074 lockdep_assert_held(&priv->mutex);
1075
1076 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1077 keyconf->keyidx);
1078
1079 memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1080 if (iwl_is_rfkill(priv)) {
1081 IWL_DEBUG_WEP(priv,
1082 "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1083 /* but keys in device are clear anyway so return success */
1084 return 0;
1085 }
1086 ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1087 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1088 keyconf->keyidx, ret);
1089
1090 return ret;
1091 }
1092
1093 int iwl_set_default_wep_key(struct iwl_priv *priv,
1094 struct iwl_rxon_context *ctx,
1095 struct ieee80211_key_conf *keyconf)
1096 {
1097 int ret;
1098
1099 lockdep_assert_held(&priv->mutex);
1100
1101 if (keyconf->keylen != WEP_KEY_LEN_128 &&
1102 keyconf->keylen != WEP_KEY_LEN_64) {
1103 IWL_DEBUG_WEP(priv,
1104 "Bad WEP key length %d\n", keyconf->keylen);
1105 return -EINVAL;
1106 }
1107
1108 keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1109
1110 ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1111 memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1112 keyconf->keylen);
1113
1114 ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1115 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1116 keyconf->keylen, keyconf->keyidx, ret);
1117
1118 return ret;
1119 }
1120
1121 /*
1122 * dynamic (per-station) keys
1123 *
1124 * The dynamic keys are a little more complicated. The device has
1125 * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1126 * These are linked to stations by a table that contains an index
1127 * into the key table for each station/key index/{mcast,unicast},
1128 * i.e. it's basically an array of pointers like this:
1129 * key_offset_t key_mapping[NUM_STATIONS][4][2];
1130 * (it really works differently, but you can think of it as such)
1131 *
1132 * The key uploading and linking happens in the same command, the
1133 * add station command with STA_MODIFY_KEY_MASK.
1134 */
1135
1136 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1137 struct ieee80211_vif *vif,
1138 struct ieee80211_sta *sta)
1139 {
1140 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1141
1142 if (sta)
1143 return iwl_sta_id(sta);
1144
1145 /*
1146 * The device expects GTKs for station interfaces to be
1147 * installed as GTKs for the AP station. If we have no
1148 * station ID, then use the ap_sta_id in that case.
1149 */
1150 if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
1151 return vif_priv->ctx->ap_sta_id;
1152
1153 return IWL_INVALID_STATION;
1154 }
1155
1156 static int iwlagn_send_sta_key(struct iwl_priv *priv,
1157 struct ieee80211_key_conf *keyconf,
1158 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1159 u32 cmd_flags)
1160 {
1161 __le16 key_flags;
1162 struct iwl_addsta_cmd sta_cmd;
1163 int i;
1164
1165 spin_lock_bh(&priv->sta_lock);
1166 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1167 spin_unlock_bh(&priv->sta_lock);
1168
1169 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1170 key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1171
1172 switch (keyconf->cipher) {
1173 case WLAN_CIPHER_SUITE_CCMP:
1174 key_flags |= STA_KEY_FLG_CCMP;
1175 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1176 break;
1177 case WLAN_CIPHER_SUITE_TKIP:
1178 key_flags |= STA_KEY_FLG_TKIP;
1179 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1180 for (i = 0; i < 5; i++)
1181 sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1182 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1183 break;
1184 case WLAN_CIPHER_SUITE_WEP104:
1185 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1186 /* fall through */
1187 case WLAN_CIPHER_SUITE_WEP40:
1188 key_flags |= STA_KEY_FLG_WEP;
1189 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1190 break;
1191 default:
1192 WARN_ON(1);
1193 return -EINVAL;
1194 }
1195
1196 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1197 key_flags |= STA_KEY_MULTICAST_MSK;
1198
1199 /* key pointer (offset) */
1200 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1201
1202 sta_cmd.key.key_flags = key_flags;
1203 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1204 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1205
1206 return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1207 }
1208
1209 void iwl_update_tkip_key(struct iwl_priv *priv,
1210 struct ieee80211_vif *vif,
1211 struct ieee80211_key_conf *keyconf,
1212 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1213 {
1214 u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1215
1216 if (sta_id == IWL_INVALID_STATION)
1217 return;
1218
1219 if (iwl_scan_cancel(priv)) {
1220 /* cancel scan failed, just live w/ bad key and rely
1221 briefly on SW decryption */
1222 return;
1223 }
1224
1225 iwlagn_send_sta_key(priv, keyconf, sta_id,
1226 iv32, phase1key, CMD_ASYNC);
1227 }
1228
1229 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1230 struct iwl_rxon_context *ctx,
1231 struct ieee80211_key_conf *keyconf,
1232 struct ieee80211_sta *sta)
1233 {
1234 struct iwl_addsta_cmd sta_cmd;
1235 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1236 __le16 key_flags;
1237
1238 /* if station isn't there, neither is the key */
1239 if (sta_id == IWL_INVALID_STATION)
1240 return -ENOENT;
1241
1242 spin_lock_bh(&priv->sta_lock);
1243 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1244 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1245 sta_id = IWL_INVALID_STATION;
1246 spin_unlock_bh(&priv->sta_lock);
1247
1248 if (sta_id == IWL_INVALID_STATION)
1249 return 0;
1250
1251 lockdep_assert_held(&priv->mutex);
1252
1253 ctx->key_mapping_keys--;
1254
1255 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1256 keyconf->keyidx, sta_id);
1257
1258 if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1259 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1260 keyconf->hw_key_idx);
1261
1262 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1263 key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
1264 STA_KEY_FLG_INVALID;
1265
1266 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1267 key_flags |= STA_KEY_MULTICAST_MSK;
1268
1269 sta_cmd.key.key_flags = key_flags;
1270 sta_cmd.key.key_offset = WEP_INVALID_OFFSET;
1271 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1272 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1273
1274 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1275 }
1276
1277 int iwl_set_dynamic_key(struct iwl_priv *priv,
1278 struct iwl_rxon_context *ctx,
1279 struct ieee80211_key_conf *keyconf,
1280 struct ieee80211_sta *sta)
1281 {
1282 struct ieee80211_key_seq seq;
1283 u16 p1k[5];
1284 int ret;
1285 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1286 const u8 *addr;
1287
1288 if (sta_id == IWL_INVALID_STATION)
1289 return -EINVAL;
1290
1291 lockdep_assert_held(&priv->mutex);
1292
1293 keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1294 if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1295 return -ENOSPC;
1296
1297 ctx->key_mapping_keys++;
1298
1299 switch (keyconf->cipher) {
1300 case WLAN_CIPHER_SUITE_TKIP:
1301 if (sta)
1302 addr = sta->addr;
1303 else /* station mode case only */
1304 addr = ctx->active.bssid_addr;
1305
1306 /* pre-fill phase 1 key into device cache */
1307 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1308 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1309 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1310 seq.tkip.iv32, p1k, CMD_SYNC);
1311 break;
1312 case WLAN_CIPHER_SUITE_CCMP:
1313 case WLAN_CIPHER_SUITE_WEP40:
1314 case WLAN_CIPHER_SUITE_WEP104:
1315 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1316 0, NULL, CMD_SYNC);
1317 break;
1318 default:
1319 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1320 ret = -EINVAL;
1321 }
1322
1323 if (ret) {
1324 ctx->key_mapping_keys--;
1325 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1326 }
1327
1328 IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1329 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1330 sta ? sta->addr : NULL, ret);
1331
1332 return ret;
1333 }
1334
1335 /**
1336 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1337 *
1338 * This adds the broadcast station into the driver's station table
1339 * and marks it driver active, so that it will be restored to the
1340 * device at the next best time.
1341 */
1342 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1343 struct iwl_rxon_context *ctx)
1344 {
1345 struct iwl_link_quality_cmd *link_cmd;
1346 u8 sta_id;
1347
1348 spin_lock_bh(&priv->sta_lock);
1349 sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1350 if (sta_id == IWL_INVALID_STATION) {
1351 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1352 spin_unlock_bh(&priv->sta_lock);
1353
1354 return -EINVAL;
1355 }
1356
1357 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1358 priv->stations[sta_id].used |= IWL_STA_BCAST;
1359 spin_unlock_bh(&priv->sta_lock);
1360
1361 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1362 if (!link_cmd) {
1363 IWL_ERR(priv,
1364 "Unable to initialize rate scaling for bcast station.\n");
1365 return -ENOMEM;
1366 }
1367
1368 spin_lock_bh(&priv->sta_lock);
1369 priv->stations[sta_id].lq = link_cmd;
1370 spin_unlock_bh(&priv->sta_lock);
1371
1372 return 0;
1373 }
1374
1375 /**
1376 * iwl_update_bcast_station - update broadcast station's LQ command
1377 *
1378 * Only used by iwlagn. Placed here to have all bcast station management
1379 * code together.
1380 */
1381 int iwl_update_bcast_station(struct iwl_priv *priv,
1382 struct iwl_rxon_context *ctx)
1383 {
1384 struct iwl_link_quality_cmd *link_cmd;
1385 u8 sta_id = ctx->bcast_sta_id;
1386
1387 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1388 if (!link_cmd) {
1389 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1390 return -ENOMEM;
1391 }
1392
1393 spin_lock_bh(&priv->sta_lock);
1394 if (priv->stations[sta_id].lq)
1395 kfree(priv->stations[sta_id].lq);
1396 else
1397 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1398 priv->stations[sta_id].lq = link_cmd;
1399 spin_unlock_bh(&priv->sta_lock);
1400
1401 return 0;
1402 }
1403
1404 int iwl_update_bcast_stations(struct iwl_priv *priv)
1405 {
1406 struct iwl_rxon_context *ctx;
1407 int ret = 0;
1408
1409 for_each_context(priv, ctx) {
1410 ret = iwl_update_bcast_station(priv, ctx);
1411 if (ret)
1412 break;
1413 }
1414
1415 return ret;
1416 }
1417
1418 /**
1419 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1420 */
1421 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1422 {
1423 struct iwl_addsta_cmd sta_cmd;
1424
1425 lockdep_assert_held(&priv->mutex);
1426
1427 /* Remove "disable" flag, to enable Tx for this TID */
1428 spin_lock_bh(&priv->sta_lock);
1429 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1430 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
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_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1439 int tid, u16 ssn)
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 return -ENXIO;
1449
1450 spin_lock_bh(&priv->sta_lock);
1451 priv->stations[sta_id].sta.station_flags_msk = 0;
1452 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1453 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1454 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1455 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1456 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1457 spin_unlock_bh(&priv->sta_lock);
1458
1459 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1460 }
1461
1462 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1463 int tid)
1464 {
1465 int sta_id;
1466 struct iwl_addsta_cmd sta_cmd;
1467
1468 lockdep_assert_held(&priv->mutex);
1469
1470 sta_id = iwl_sta_id(sta);
1471 if (sta_id == IWL_INVALID_STATION) {
1472 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1473 return -ENXIO;
1474 }
1475
1476 spin_lock_bh(&priv->sta_lock);
1477 priv->stations[sta_id].sta.station_flags_msk = 0;
1478 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1479 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1480 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1481 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1482 spin_unlock_bh(&priv->sta_lock);
1483
1484 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1485 }
1486
1487
1488
1489 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1490 {
1491 struct iwl_addsta_cmd cmd = {
1492 .mode = STA_CONTROL_MODIFY_MSK,
1493 .station_flags = STA_FLG_PWR_SAVE_MSK,
1494 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1495 .sta.sta_id = sta_id,
1496 .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK,
1497 .sleep_tx_count = cpu_to_le16(cnt),
1498 };
1499
1500 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1501 }
Linux kernel - Deliverables
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