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Merge branch 'master' of git://dev.medozas.de/linux
[net-next-2.6.git] / drivers / net / wireless / iwlwifi / iwl-sta.c
CommitLineData
6974e363
EG		 1/******************************************************************************
2 *
1f447808 3 * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
6974e363
EG		 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:
759ef89f 25 * Intel Linux Wireless <ilw@linux.intel.com>
6974e363
EG		 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30#include <net/mac80211.h>
947b13a7 31#include <linux/etherdevice.h>
fe6b23dd 32#include <linux/sched.h>
6974e363 33
3e0d4cb1 34#include "iwl-dev.h"
6974e363
EG		 35#include "iwl-core.h"
36#include "iwl-sta.h"
7a999bf0 37
947b13a7
TW		 38u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
39{
40 int i;
41 int start = 0;
42 int ret = IWL_INVALID_STATION;
43 unsigned long flags;
947b13a7 44
05c914fe
JB		 45 if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
46 (priv->iw_mode == NL80211_IFTYPE_AP))
947b13a7
TW		 47 start = IWL_STA_ID;
48
49 if (is_broadcast_ether_addr(addr))
50 return priv->hw_params.bcast_sta_id;
51
52 spin_lock_irqsave(&priv->sta_lock, flags);
53 for (i = start; i < priv->hw_params.max_stations; i++)
54 if (priv->stations[i].used &&
55 (!compare_ether_addr(priv->stations[i].sta.sta.addr,
56 addr))) {
57 ret = i;
58 goto out;
59 }
60
e1623446 61 IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
e174961c 62 addr, priv->num_stations);
947b13a7
TW		 63
64 out:
fe6b23dd
RC		 65 /*
66 * It may be possible that more commands interacting with stations
67 * arrive before we completed processing the adding of
68 * station
69 */
70 if (ret != IWL_INVALID_STATION &&
71 (!(priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) ||
72 ((priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) &&
73 (priv->stations[ret].used & IWL_STA_UCODE_INPROGRESS)))) {
91dd6c27 74 IWL_ERR(priv, "Requested station info for sta %d before ready.\n",
fe6b23dd
RC		 75 ret);
76 ret = IWL_INVALID_STATION;
77 }
947b13a7
TW		 78 spin_unlock_irqrestore(&priv->sta_lock, flags);
79 return ret;
80}
81EXPORT_SYMBOL(iwl_find_station);
82
be1f3ab6
EG		 83int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
84{
05c914fe 85 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
be1f3ab6
EG		 86 return IWL_AP_ID;
87 } else {
88 u8 *da = ieee80211_get_DA(hdr);
c587de0b 89 return iwl_find_station(priv, da);
be1f3ab6
EG		 90 }
91}
92EXPORT_SYMBOL(iwl_get_ra_sta_id);
93
1fa97aae 94/* priv->sta_lock must be held */
24e5c401
EG		 95static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
96{
24e5c401 97
c587de0b 98 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
1fa97aae
RC		 99 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
100 sta_id, priv->stations[sta_id].sta.sta.addr);
24e5c401 101
1fa97aae
RC		 102 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
103 IWL_DEBUG_ASSOC(priv,
104 "STA id %u addr %pM already present in uCode (according to driver)\n",
105 sta_id, priv->stations[sta_id].sta.sta.addr);
106 } else {
107 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
108 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
109 sta_id, priv->stations[sta_id].sta.sta.addr);
110 }
24e5c401
EG		 111}
112
1fa97aae
RC		 113static void iwl_process_add_sta_resp(struct iwl_priv *priv,
114 struct iwl_addsta_cmd *addsta,
115 struct iwl_rx_packet *pkt,
116 bool sync)
42132bce 117{
3257e5d4 118 u8 sta_id = addsta->sta.sta_id;
1fa97aae 119 unsigned long flags;
42132bce 120
2f301227 121 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
15b1687c 122 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
1fa97aae 123 pkt->hdr.flags);
5696aea6 124 return;
42132bce
TW		 125 }
126
1fa97aae
RC		 127 IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
128 sta_id);
129
130 spin_lock_irqsave(&priv->sta_lock, flags);
131
2f301227 132 switch (pkt->u.add_sta.status) {
42132bce 133 case ADD_STA_SUCCESS_MSK:
1fa97aae 134 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
24e5c401 135 iwl_sta_ucode_activate(priv, sta_id);
1fa97aae
RC		 136 break;
137 case ADD_STA_NO_ROOM_IN_TABLE:
138 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
139 sta_id);
140 break;
141 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
142 IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n",
143 sta_id);
144 break;
145 case ADD_STA_MODIFY_NON_EXIST_STA:
91dd6c27 146 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
1fa97aae
RC		 147 sta_id);
148 break;
42132bce 149 default:
1fa97aae
RC		 150 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
151 pkt->u.add_sta.status);
42132bce
TW		 152 break;
153 }
1fa97aae
RC		 154
155 IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
156 priv->stations[sta_id].sta.mode ==
157 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
158 sta_id, priv->stations[sta_id].sta.sta.addr);
159
160 /*
161 * XXX: The MAC address in the command buffer is often changed from
162 * the original sent to the device. That is, the MAC address
163 * written to the command buffer often is not the same MAC adress
164 * read from the command buffer when the command returns. This
165 * issue has not yet been resolved and this debugging is left to
166 * observe the problem.
167 */
168 IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
169 priv->stations[sta_id].sta.mode ==
170 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
171 addsta->sta.addr);
1fa97aae
RC		 172 spin_unlock_irqrestore(&priv->sta_lock, flags);
173}
174
175static void iwl_add_sta_callback(struct iwl_priv *priv,
176 struct iwl_device_cmd *cmd,
177 struct iwl_rx_packet *pkt)
178{
179 struct iwl_addsta_cmd *addsta =
180 (struct iwl_addsta_cmd *)cmd->cmd.payload;
181
182 iwl_process_add_sta_resp(priv, addsta, pkt, false);
183
42132bce
TW		 184}
185
17f841cd 186int iwl_send_add_sta(struct iwl_priv *priv,
133636de
TW		 187 struct iwl_addsta_cmd *sta, u8 flags)
188{
2f301227 189 struct iwl_rx_packet *pkt = NULL;
133636de
TW		 190 int ret = 0;
191 u8 data[sizeof(*sta)];
192 struct iwl_host_cmd cmd = {
193 .id = REPLY_ADD_STA,
c2acea8e 194 .flags = flags,
133636de
TW		 195 .data = data,
196 };
f875f518 197 u8 sta_id __maybe_unused = sta->sta.sta_id;
fe6b23dd
RC		 198
199 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
200 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
133636de 201
42132bce 202 if (flags & CMD_ASYNC)
c2acea8e 203 cmd.callback = iwl_add_sta_callback;
42132bce 204 else
c2acea8e 205 cmd.flags |= CMD_WANT_SKB;
133636de
TW		 206
207 cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
208 ret = iwl_send_cmd(priv, &cmd);
209
210 if (ret || (flags & CMD_ASYNC))
211 return ret;
212
133636de 213 if (ret == 0) {
1fa97aae
RC		 214 pkt = (struct iwl_rx_packet *)cmd.reply_page;
215 iwl_process_add_sta_resp(priv, sta, pkt, true);
133636de 216 }
64a76b50 217 iwl_free_pages(priv, cmd.reply_page);
133636de
TW		 218
219 return ret;
220}
17f841cd 221EXPORT_SYMBOL(iwl_send_add_sta);
947b13a7 222
4f40e4d9 223static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
d9fe60de 224 struct ieee80211_sta_ht_cap *sta_ht_inf)
4f40e4d9
TW		 225{
226 __le32 sta_flags;
227 u8 mimo_ps_mode;
228
229 if (!sta_ht_inf || !sta_ht_inf->ht_supported)
230 goto done;
231
00c5ae2f 232 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
3f3e0376
WYG		 233 IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
234 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
235 "static" :
236 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
237 "dynamic" : "disabled");
4f40e4d9
TW		 238
239 sta_flags = priv->stations[index].sta.station_flags;
240
241 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
242
243 switch (mimo_ps_mode) {
00c5ae2f 244 case WLAN_HT_CAP_SM_PS_STATIC:
4f40e4d9
TW		 245 sta_flags |= STA_FLG_MIMO_DIS_MSK;
246 break;
00c5ae2f 247 case WLAN_HT_CAP_SM_PS_DYNAMIC:
4f40e4d9
TW		 248 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
249 break;
00c5ae2f 250 case WLAN_HT_CAP_SM_PS_DISABLED:
4f40e4d9
TW		 251 break;
252 default:
39aadf8c 253 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
4f40e4d9
TW		 254 break;
255 }
256
257 sta_flags |= cpu_to_le32(
258 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
259
260 sta_flags |= cpu_to_le32(
261 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
262
7aafef1c
WYG		 263 if (iwl_is_ht40_tx_allowed(priv, sta_ht_inf))
264 sta_flags |= STA_FLG_HT40_EN_MSK;
4f40e4d9 265 else
7aafef1c 266 sta_flags &= ~STA_FLG_HT40_EN_MSK;
4f40e4d9
TW		 267
268 priv->stations[index].sta.station_flags = sta_flags;
269 done:
270 return;
271}
4f40e4d9
TW		 272
273/**
fe6b23dd
RC		 274 * iwl_prep_station - Prepare station information for addition
275 *
276 * should be called with sta_lock held
4f40e4d9 277 */
fe6b23dd
RC		 278static u8 iwl_prep_station(struct iwl_priv *priv, const u8 *addr,
279 bool is_ap,
280 struct ieee80211_sta_ht_cap *ht_info)
4f40e4d9 281{
4f40e4d9 282 struct iwl_station_entry *station;
c587de0b 283 int i;
fe6b23dd 284 u8 sta_id = IWL_INVALID_STATION;
c587de0b 285 u16 rate;
4f40e4d9 286
4f40e4d9 287 if (is_ap)
24e5c401 288 sta_id = IWL_AP_ID;
4f40e4d9 289 else if (is_broadcast_ether_addr(addr))
24e5c401 290 sta_id = priv->hw_params.bcast_sta_id;
4f40e4d9
TW		 291 else
292 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
293 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
294 addr)) {
24e5c401 295 sta_id = i;
4f40e4d9
TW		 296 break;
297 }
298
299 if (!priv->stations[i].used &&
24e5c401
EG		 300 sta_id == IWL_INVALID_STATION)
301 sta_id = i;
4f40e4d9
TW		 302 }
303
fe6b23dd
RC		 304 /*
305 * These two conditions have the same outcome, but keep them
306 * separate
307 */
308 if (unlikely(sta_id == IWL_INVALID_STATION))
309 return sta_id;
310
311 /*
312 * uCode is not able to deal with multiple requests to add a
313 * station. Keep track if one is in progress so that we do not send
314 * another.
315 */
316 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
317 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
318 sta_id);
24e5c401 319 return sta_id;
4f40e4d9
TW		 320 }
321
fe6b23dd
RC		 322 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
323 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
24e5c401 324 !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
fe6b23dd
RC		 325 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
326 sta_id, addr);
24e5c401 327 return sta_id;
4f40e4d9
TW		 328 }
329
24e5c401
EG		 330 station = &priv->stations[sta_id];
331 station->used = IWL_STA_DRIVER_ACTIVE;
e1623446 332 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
e174961c 333 sta_id, addr);
4f40e4d9
TW		 334 priv->num_stations++;
335
336 /* Set up the REPLY_ADD_STA command to send to device */
337 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
338 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
339 station->sta.mode = 0;
24e5c401 340 station->sta.sta.sta_id = sta_id;
4f40e4d9
TW		 341 station->sta.station_flags = 0;
342
343 /* BCAST station and IBSS stations do not work in HT mode */
24e5c401 344 if (sta_id != priv->hw_params.bcast_sta_id &&
05c914fe 345 priv->iw_mode != NL80211_IFTYPE_ADHOC)
24e5c401 346 iwl_set_ht_add_station(priv, sta_id, ht_info);
4f40e4d9 347
c587de0b
TW		 348 /* 3945 only */
349 rate = (priv->band == IEEE80211_BAND_5GHZ) ?
350 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
351 /* Turn on both antennas for the station... */
352 station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
353
fe6b23dd
RC		 354 return sta_id;
355
356}
357
358#define STA_WAIT_TIMEOUT (HZ/2)
359
360/**
361 * iwl_add_station_common -
362 */
363int iwl_add_station_common(struct iwl_priv *priv, const u8 *addr,
364 bool is_ap,
365 struct ieee80211_sta_ht_cap *ht_info,
366 u8 *sta_id_r)
367{
368 struct iwl_station_entry *station;
369 unsigned long flags_spin;
370 int ret = 0;
371 u8 sta_id;
372
373 *sta_id_r = 0;
374 spin_lock_irqsave(&priv->sta_lock, flags_spin);
375 sta_id = iwl_prep_station(priv, addr, is_ap, ht_info);
376 if (sta_id == IWL_INVALID_STATION) {
377 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
378 addr);
379 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
380 return -EINVAL;
381 }
382
383 /*
384 * uCode is not able to deal with multiple requests to add a
385 * station. Keep track if one is in progress so that we do not send
386 * another.
387 */
388 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
389 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
390 sta_id);
391 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
392 return -EEXIST;
393 }
394
395 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
396 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
397 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
398 sta_id, addr);
399 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
400 return -EEXIST;
401 }
402
403 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
404 station = &priv->stations[sta_id];
4f40e4d9
TW		 405 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
406
407 /* Add station to device's station table */
fe6b23dd
RC		 408 ret = iwl_send_add_sta(priv, &station->sta, CMD_SYNC);
409 if (ret) {
410 IWL_ERR(priv, "Adding station %pM failed.\n", station->sta.sta.addr);
411 spin_lock_irqsave(&priv->sta_lock, flags_spin);
412 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
413 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
414 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
415 }
416 *sta_id_r = sta_id;
417 return ret;
4f40e4d9 418}
fe6b23dd 419EXPORT_SYMBOL(iwl_add_station_common);
4f40e4d9 420
fe6b23dd 421static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
7a999bf0 422{
fe6b23dd
RC		 423 int i, r;
424 struct iwl_link_quality_cmd link_cmd = {
425 .reserved1 = 0,
426 };
427 u32 rate_flags;
57e40d36 428 int ret = 0;
fe6b23dd
RC		 429
430 /* Set up the rate scaling to start at selected rate, fall back
431 * all the way down to 1M in IEEE order, and then spin on 1M */
432 if (is_ap)
433 r = IWL_RATE_54M_INDEX;
434 else if (priv->band == IEEE80211_BAND_5GHZ)
435 r = IWL_RATE_6M_INDEX;
436 else
437 r = IWL_RATE_1M_INDEX;
24e5c401 438
fe6b23dd
RC		 439 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
440 rate_flags = 0;
441 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
442 rate_flags |= RATE_MCS_CCK_MSK;
24e5c401 443
fe6b23dd
RC		 444 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
445 RATE_MCS_ANT_POS;
24e5c401 446
fe6b23dd
RC		 447 link_cmd.rs_table[i].rate_n_flags =
448 iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
449 r = iwl_get_prev_ieee_rate(r);
450 }
24e5c401 451
fe6b23dd
RC		 452 link_cmd.general_params.single_stream_ant_msk =
453 first_antenna(priv->hw_params.valid_tx_ant);
3a23d695
WYG		 454
455 link_cmd.general_params.dual_stream_ant_msk =
456 priv->hw_params.valid_tx_ant &
457 ~first_antenna(priv->hw_params.valid_tx_ant);
458 if (!link_cmd.general_params.dual_stream_ant_msk) {
459 link_cmd.general_params.dual_stream_ant_msk = ANT_AB;
460 } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) {
461 link_cmd.general_params.dual_stream_ant_msk =
462 priv->hw_params.valid_tx_ant;
463 }
464
fe6b23dd
RC		 465 link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
466 link_cmd.agg_params.agg_time_limit =
467 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
24e5c401 468
fe6b23dd
RC		 469 /* Update the rate scaling for control frame Tx to AP */
470 link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
24e5c401 471
57e40d36 472 ret = iwl_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD,
fe6b23dd 473 sizeof(link_cmd), &link_cmd);
57e40d36
WYG		 474 if (ret)
475 IWL_ERR(priv, "REPLY_TX_LINK_QUALITY_CMD failed (%d)\n", ret);
7a999bf0
TW		 476}
477
fe6b23dd
RC		 478/*
479 * iwl_add_local_stations - Add stations not requested by mac80211
480 *
481 * This will be either the broadcast station or the bssid station needed by
482 * ad-hoc.
483 *
484 * Function sleeps.
485 */
486int iwl_add_local_station(struct iwl_priv *priv, const u8 *addr, bool init_rs)
7a999bf0 487{
fe6b23dd
RC		 488 int ret;
489 u8 sta_id;
7a999bf0 490
fe6b23dd
RC		 491 ret = iwl_add_station_common(priv, addr, 0, NULL, &sta_id);
492 if (ret) {
493 IWL_ERR(priv, "Unable to add station %pM\n", addr);
494 return ret;
7a999bf0
TW		 495 }
496
fe6b23dd
RC		 497 if (init_rs)
498 /* Set up default rate scaling table in device's station table */
499 iwl_sta_init_lq(priv, addr, false);
500 return 0;
501}
502EXPORT_SYMBOL(iwl_add_local_station);
503
504/**
505 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
506 *
507 * priv->sta_lock must be held
508 */
509static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
510{
511 /* Ucode must be active and driver must be non active */
512 if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
513 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
514
515 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
516
517 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
518 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
7a999bf0
TW		 519}
520
fe6b23dd
RC		 521static int iwl_send_remove_station(struct iwl_priv *priv,
522 struct iwl_station_entry *station)
7a999bf0 523{
2f301227 524 struct iwl_rx_packet *pkt;
7a999bf0
TW		 525 int ret;
526
fe6b23dd 527 unsigned long flags_spin;
7a999bf0
TW		 528 struct iwl_rem_sta_cmd rm_sta_cmd;
529
530 struct iwl_host_cmd cmd = {
531 .id = REPLY_REMOVE_STA,
532 .len = sizeof(struct iwl_rem_sta_cmd),
fe6b23dd 533 .flags = CMD_SYNC,
7a999bf0
TW		 534 .data = &rm_sta_cmd,
535 };
536
537 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
538 rm_sta_cmd.num_sta = 1;
fe6b23dd
RC		 539 memcpy(&rm_sta_cmd.addr, &station->sta.sta.addr , ETH_ALEN);
540
541 cmd.flags |= CMD_WANT_SKB;
7a999bf0 542
7a999bf0
TW		 543 ret = iwl_send_cmd(priv, &cmd);
544
fe6b23dd 545 if (ret)
7a999bf0
TW		 546 return ret;
547
2f301227
ZY		 548 pkt = (struct iwl_rx_packet *)cmd.reply_page;
549 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
15b1687c 550 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
2f301227 551 pkt->hdr.flags);
7a999bf0
TW		 552 ret = -EIO;
553 }
554
555 if (!ret) {
2f301227 556 switch (pkt->u.rem_sta.status) {
7a999bf0 557 case REM_STA_SUCCESS_MSK:
fe6b23dd
RC		 558 spin_lock_irqsave(&priv->sta_lock, flags_spin);
559 iwl_sta_ucode_deactivate(priv, station->sta.sta.sta_id);
560 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
e1623446 561 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
7a999bf0
TW		 562 break;
563 default:
564 ret = -EIO;
15b1687c 565 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
7a999bf0
TW		 566 break;
567 }
568 }
64a76b50 569 iwl_free_pages(priv, cmd.reply_page);
7a999bf0
TW		 570
571 return ret;
572}
be1f3ab6 573
7a999bf0
TW		 574/**
575 * iwl_remove_station - Remove driver's knowledge of station.
7a999bf0 576 */
fe6b23dd 577static int iwl_remove_station(struct iwl_priv *priv, struct ieee80211_sta *sta)
7a999bf0 578{
24e5c401
EG		 579 int sta_id = IWL_INVALID_STATION;
580 int i, ret = -EINVAL;
7a999bf0 581 unsigned long flags;
fe6b23dd
RC		 582 bool is_ap = priv->iw_mode == NL80211_IFTYPE_STATION;
583 struct iwl_station_entry *station;
584
585 if (!iwl_is_ready(priv)) {
586 IWL_DEBUG_INFO(priv,
91dd6c27 587 "Unable to remove station %pM, device not ready.\n",
fe6b23dd
RC		 588 sta->addr);
589 /*
590 * It is typical for stations to be removed when we are
591 * going down. Return success since device will be down
592 * soon anyway
593 */
594 return 0;
595 }
7a999bf0
TW		 596
597 spin_lock_irqsave(&priv->sta_lock, flags);
598
599 if (is_ap)
24e5c401 600 sta_id = IWL_AP_ID;
7a999bf0
TW		 601 else
602 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
603 if (priv->stations[i].used &&
604 !compare_ether_addr(priv->stations[i].sta.sta.addr,
fe6b23dd 605 sta->addr)) {
24e5c401 606 sta_id = i;
7a999bf0
TW		 607 break;
608 }
609
24e5c401 610 if (unlikely(sta_id == IWL_INVALID_STATION))
7a999bf0
TW		 611 goto out;
612
e1623446 613 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
fe6b23dd 614 sta_id, sta->addr);
24e5c401
EG		 615
616 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
fe6b23dd
RC		 617 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
618 sta->addr);
24e5c401
EG		 619 goto out;
620 }
621
622 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
fe6b23dd
RC		 623 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
624 sta->addr);
24e5c401 625 goto out;
7a999bf0
TW		 626 }
627
24e5c401
EG		 628
629 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
630
631 priv->num_stations--;
632
7a999bf0 633 BUG_ON(priv->num_stations < 0);
24e5c401 634
fe6b23dd 635 station = &priv->stations[sta_id];
7a999bf0 636 spin_unlock_irqrestore(&priv->sta_lock, flags);
24e5c401 637
fe6b23dd 638 ret = iwl_send_remove_station(priv, station);
24e5c401 639 return ret;
7a999bf0
TW		 640out:
641 spin_unlock_irqrestore(&priv->sta_lock, flags);
24e5c401 642 return ret;
7a999bf0 643}
24e5c401 644
83dde8c9 645/**
7e246191
RC		 646 * iwl_clear_ucode_stations() - clear entire station table driver and/or ucode
647 * @priv:
648 * @force: If set then the uCode station table needs to be cleared here. If
649 * not set then the uCode station table has already been cleared,
650 * for example after sending it a RXON command without ASSOC bit
651 * set, and we just need to change driver state here.
83dde8c9 652 */
7e246191 653void iwl_clear_ucode_stations(struct iwl_priv *priv, bool force)
83dde8c9 654{
48676eb3 655 int i;
7e246191
RC		 656 unsigned long flags_spin;
657 bool cleared = false;
658
659 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver%s\n",
660 force ? " and ucode" : "");
661
662 if (force) {
663 if (!iwl_is_ready(priv)) {
664 /*
665 * If device is not ready at this point the station
666 * table is likely already empty (uCode not ready
667 * to receive station requests) or will soon be
668 * due to interface going down.
669 */
670 IWL_DEBUG_INFO(priv, "Unable to remove stations from device - device not ready\n");
671 } else {
672 iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL);
673 }
674 }
83dde8c9 675
7e246191
RC		 676 spin_lock_irqsave(&priv->sta_lock, flags_spin);
677 if (force) {
678 IWL_DEBUG_INFO(priv, "Clearing all station information in driver\n");
679 priv->num_stations = 0;
680 memset(priv->stations, 0, sizeof(priv->stations));
681 } else {
682 for (i = 0; i < priv->hw_params.max_stations; i++) {
683 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
91dd6c27 684 IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
7e246191
RC		 685 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
686 cleared = true;
687 }
688 }
689 }
690 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
691
692 if (!cleared)
693 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
694}
695EXPORT_SYMBOL(iwl_clear_ucode_stations);
83dde8c9 696
7e246191
RC		 697/**
698 * iwl_restore_stations() - Restore driver known stations to device
699 *
700 * All stations considered active by driver, but not present in ucode, is
701 * restored.
fe6b23dd
RC		 702 *
703 * Function sleeps.
7e246191
RC		 704 */
705void iwl_restore_stations(struct iwl_priv *priv)
706{
fe6b23dd 707 struct iwl_station_entry *station;
7e246191
RC		 708 unsigned long flags_spin;
709 int i;
710 bool found = false;
fe6b23dd 711 int ret;
83dde8c9 712
7e246191
RC		 713 if (!iwl_is_ready(priv)) {
714 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
715 return;
716 }
83dde8c9 717
7e246191
RC		 718 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
719 spin_lock_irqsave(&priv->sta_lock, flags_spin);
720 for (i = 0; i < priv->hw_params.max_stations; i++) {
721 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
722 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
723 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
724 priv->stations[i].sta.sta.addr);
725 priv->stations[i].sta.mode = 0;
726 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
727 found = true;
728 }
729 }
5e46882e 730
7e246191
RC		 731 for (i = 0; i < priv->hw_params.max_stations; i++) {
732 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
fe6b23dd
RC		 733 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
734 station = &priv->stations[i];
735 ret = iwl_send_add_sta(priv, &priv->stations[i].sta, CMD_SYNC);
736 if (ret) {
737 IWL_ERR(priv, "Adding station %pM failed.\n",
738 station->sta.sta.addr);
739 spin_lock_irqsave(&priv->sta_lock, flags_spin);
740 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
741 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
742 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
743 }
744 /*
745 * Rate scaling has already been initialized, send
746 * current LQ command
747 */
748 if (station->lq)
749 iwl_send_lq_cmd(priv, station->lq, CMD_SYNC, true);
750 spin_lock_irqsave(&priv->sta_lock, flags_spin);
7e246191
RC		 751 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
752 }
48676eb3
MA		 753 }
754
7e246191
RC		 755 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
756 if (!found)
757 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
758 else
fe6b23dd 759 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
83dde8c9 760}
7e246191 761EXPORT_SYMBOL(iwl_restore_stations);
83dde8c9 762
6e21f15c 763int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
80fb47a1
EG		 764{
765 int i;
766
767 for (i = 0; i < STA_KEY_MAX_NUM; i++)
77bab602 768 if (!test_and_set_bit(i, &priv->ucode_key_table))
80fb47a1
EG		 769 return i;
770
40a9a829 771 return WEP_INVALID_OFFSET;
80fb47a1 772}
6e21f15c 773EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
6974e363 774
335348b1 775static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
6974e363
EG		 776{
777 int i, not_empty = 0;
778 u8 buff[sizeof(struct iwl_wep_cmd) +
779 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
780 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
781 size_t cmd_size = sizeof(struct iwl_wep_cmd);
782 struct iwl_host_cmd cmd = {
783 .id = REPLY_WEPKEY,
784 .data = wep_cmd,
72e15d71 785 .flags = CMD_SYNC,
6974e363
EG		 786 };
787
72e15d71
JB		 788 might_sleep();
789
6974e363
EG		 790 memset(wep_cmd, 0, cmd_size +
791 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
792
793 for (i = 0; i < WEP_KEYS_MAX ; i++) {
794 wep_cmd->key[i].key_index = i;
795 if (priv->wep_keys[i].key_size) {
796 wep_cmd->key[i].key_offset = i;
797 not_empty = 1;
798 } else {
799 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
800 }
801
802 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
803 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
804 priv->wep_keys[i].key_size);
805 }
806
807 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
808 wep_cmd->num_keys = WEP_KEYS_MAX;
809
810 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
811
812 cmd.len = cmd_size;
813
814 if (not_empty || send_if_empty)
815 return iwl_send_cmd(priv, &cmd);
816 else
817 return 0;
818}
335348b1
JB		 819
820int iwl_restore_default_wep_keys(struct iwl_priv *priv)
821{
822 WARN_ON(!mutex_is_locked(&priv->mutex));
823
824 return iwl_send_static_wepkey_cmd(priv, 0);
825}
826EXPORT_SYMBOL(iwl_restore_default_wep_keys);
6974e363
EG		 827
828int iwl_remove_default_wep_key(struct iwl_priv *priv,
80fb47a1 829 struct ieee80211_key_conf *keyconf)
6974e363
EG		 830{
831 int ret;
6974e363 832
72e15d71
JB		 833 WARN_ON(!mutex_is_locked(&priv->mutex));
834
2d1bb9e5
RC		 835 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
836 keyconf->keyidx);
80fb47a1 837
80fb47a1 838 memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
2d1bb9e5
RC		 839 if (iwl_is_rfkill(priv)) {
840 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
72e15d71 841 /* but keys in device are clear anyway so return success */
2d1bb9e5
RC		 842 return 0;
843 }
6974e363 844 ret = iwl_send_static_wepkey_cmd(priv, 1);
e1623446 845 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
4564ce8b 846 keyconf->keyidx, ret);
6974e363
EG		 847
848 return ret;
849}
27aaba0c 850EXPORT_SYMBOL(iwl_remove_default_wep_key);
6974e363
EG		 851
852int iwl_set_default_wep_key(struct iwl_priv *priv,
853 struct ieee80211_key_conf *keyconf)
854{
855 int ret;
72e15d71
JB		 856
857 WARN_ON(!mutex_is_locked(&priv->mutex));
6974e363 858
4564ce8b
EG		 859 if (keyconf->keylen != WEP_KEY_LEN_128 &&
860 keyconf->keylen != WEP_KEY_LEN_64) {
e1623446 861 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
4564ce8b
EG		 862 return -EINVAL;
863 }
864
6974e363 865 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
ccc038ab 866 keyconf->hw_key_idx = HW_KEY_DEFAULT;
6974e363
EG		 867 priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
868
6974e363
EG		 869 priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
870 memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
871 keyconf->keylen);
872
873 ret = iwl_send_static_wepkey_cmd(priv, 0);
e1623446 874 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
4564ce8b 875 keyconf->keylen, keyconf->keyidx, ret);
6974e363
EG		 876
877 return ret;
878}
27aaba0c 879EXPORT_SYMBOL(iwl_set_default_wep_key);
6974e363 880
7480513f 881static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
0211ddda
EG		 882 struct ieee80211_key_conf *keyconf,
883 u8 sta_id)
884{
885 unsigned long flags;
886 __le16 key_flags = 0;
887 int ret;
888
889 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
0211ddda
EG		 890
891 key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
892 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
893 key_flags &= ~STA_KEY_FLG_INVALID;
894
895 if (keyconf->keylen == WEP_KEY_LEN_128)
896 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
897
5425e490 898 if (sta_id == priv->hw_params.bcast_sta_id)
0211ddda
EG		 899 key_flags |= STA_KEY_MULTICAST_MSK;
900
901 spin_lock_irqsave(&priv->sta_lock, flags);
902
903 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
904 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
905 priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
906
907 memcpy(priv->stations[sta_id].keyinfo.key,
908 keyconf->key, keyconf->keylen);
909
910 memcpy(&priv->stations[sta_id].sta.key.key[3],
911 keyconf->key, keyconf->keylen);
912
3ec47732
EG		 913 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
914 == STA_KEY_FLG_NO_ENC)
915 priv->stations[sta_id].sta.key.key_offset =
80fb47a1 916 iwl_get_free_ucode_key_index(priv);
3ec47732
EG		 917 /* else, we are overriding an existing key => no need to allocated room
918 * in uCode. */
0211ddda 919
40a9a829 920 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
e724b8fe 921 "no space for a new key");
40a9a829 922
3ec47732 923 priv->stations[sta_id].sta.key.key_flags = key_flags;
0211ddda
EG		 924 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
925 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
926
133636de 927 ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
0211ddda
EG		 928
929 spin_unlock_irqrestore(&priv->sta_lock, flags);
930
931 return ret;
932}
7480513f
EG		 933
934static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
935 struct ieee80211_key_conf *keyconf,
936 u8 sta_id)
937{
938 unsigned long flags;
939 __le16 key_flags = 0;
40a9a829 940 int ret;
7480513f
EG		 941
942 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
943 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
944 key_flags &= ~STA_KEY_FLG_INVALID;
945
5425e490 946 if (sta_id == priv->hw_params.bcast_sta_id)
7480513f
EG		 947 key_flags |= STA_KEY_MULTICAST_MSK;
948
949 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7480513f
EG		 950
951 spin_lock_irqsave(&priv->sta_lock, flags);
952 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
953 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
954
955 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
956 keyconf->keylen);
957
958 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
959 keyconf->keylen);
960
3ec47732
EG		 961 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
962 == STA_KEY_FLG_NO_ENC)
963 priv->stations[sta_id].sta.key.key_offset =
964 iwl_get_free_ucode_key_index(priv);
965 /* else, we are overriding an existing key => no need to allocated room
966 * in uCode. */
967
40a9a829 968 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
e724b8fe 969 "no space for a new key");
40a9a829 970
7480513f
EG		 971 priv->stations[sta_id].sta.key.key_flags = key_flags;
972 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
973 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
974
40a9a829
TW		 975 ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
976
7480513f
EG		 977 spin_unlock_irqrestore(&priv->sta_lock, flags);
978
40a9a829 979 return ret;
7480513f
EG		 980}
981
982static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
983 struct ieee80211_key_conf *keyconf,
984 u8 sta_id)
985{
986 unsigned long flags;
987 int ret = 0;
299f5462
RC		 988 __le16 key_flags = 0;
989
990 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
991 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
992 key_flags &= ~STA_KEY_FLG_INVALID;
993
994 if (sta_id == priv->hw_params.bcast_sta_id)
995 key_flags |= STA_KEY_MULTICAST_MSK;
7480513f
EG		 996
997 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
998 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
7480513f
EG		 999
1000 spin_lock_irqsave(&priv->sta_lock, flags);
1001
1002 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
7480513f 1003 priv->stations[sta_id].keyinfo.keylen = 16;
3ec47732
EG		 1004
1005 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
1006 == STA_KEY_FLG_NO_ENC)
1007 priv->stations[sta_id].sta.key.key_offset =
77bab602 1008 iwl_get_free_ucode_key_index(priv);
3ec47732
EG		 1009 /* else, we are overriding an existing key => no need to allocated room
1010 * in uCode. */
7480513f 1011
40a9a829 1012 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
e724b8fe 1013 "no space for a new key");
40a9a829 1014
299f5462
RC		 1015 priv->stations[sta_id].sta.key.key_flags = key_flags;
1016
1017
7480513f
EG		 1018 /* This copy is acutally not needed: we get the key with each TX */
1019 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
1020
1021 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
1022
1023 spin_unlock_irqrestore(&priv->sta_lock, flags);
1024
1025 return ret;
1026}
1027
9f58671e
TW		 1028void iwl_update_tkip_key(struct iwl_priv *priv,
1029 struct ieee80211_key_conf *keyconf,
1030 const u8 *addr, u32 iv32, u16 *phase1key)
1031{
1032 u8 sta_id = IWL_INVALID_STATION;
1033 unsigned long flags;
9f58671e 1034 int i;
9f58671e 1035
c587de0b 1036 sta_id = iwl_find_station(priv, addr);
9f58671e 1037 if (sta_id == IWL_INVALID_STATION) {
e1623446 1038 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
9f58671e
TW		 1039 addr);
1040 return;
1041 }
1042
1043 if (iwl_scan_cancel(priv)) {
1044 /* cancel scan failed, just live w/ bad key and rely
1045 briefly on SW decryption */
1046 return;
1047 }
1048
9f58671e
TW		 1049 spin_lock_irqsave(&priv->sta_lock, flags);
1050
9f58671e
TW		 1051 priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
1052
1053 for (i = 0; i < 5; i++)
1054 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
1055 cpu_to_le16(phase1key[i]);
1056
1057 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1058 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1059
1060 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1061
1062 spin_unlock_irqrestore(&priv->sta_lock, flags);
1063
1064}
1065EXPORT_SYMBOL(iwl_update_tkip_key);
1066
3ec47732
EG		 1067int iwl_remove_dynamic_key(struct iwl_priv *priv,
1068 struct ieee80211_key_conf *keyconf,
1069 u8 sta_id)
7480513f
EG		 1070{
1071 unsigned long flags;
3ec47732
EG		 1072 int ret = 0;
1073 u16 key_flags;
1074 u8 keyidx;
7480513f 1075
ccc038ab 1076 priv->key_mapping_key--;
7480513f
EG		 1077
1078 spin_lock_irqsave(&priv->sta_lock, flags);
3ec47732
EG		 1079 key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
1080 keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
1081
e1623446 1082 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
4564ce8b
EG		 1083 keyconf->keyidx, sta_id);
1084
3ec47732
EG		 1085 if (keyconf->keyidx != keyidx) {
1086 /* We need to remove a key with index different that the one
1087 * in the uCode. This means that the key we need to remove has
1088 * been replaced by another one with different index.
1089 * Don't do anything and return ok
1090 */
1091 spin_unlock_irqrestore(&priv->sta_lock, flags);
1092 return 0;
1093 }
1094
40a9a829 1095 if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
39aadf8c 1096 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
40a9a829
TW		 1097 keyconf->keyidx, key_flags);
1098 spin_unlock_irqrestore(&priv->sta_lock, flags);
1099 return 0;
1100 }
1101
7480513f
EG		 1102 if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
1103 &priv->ucode_key_table))
15b1687c 1104 IWL_ERR(priv, "index %d not used in uCode key table.\n",
7480513f
EG		 1105 priv->stations[sta_id].sta.key.key_offset);
1106 memset(&priv->stations[sta_id].keyinfo, 0,
6def9761 1107 sizeof(struct iwl_hw_key));
7480513f
EG		 1108 memset(&priv->stations[sta_id].sta.key, 0,
1109 sizeof(struct iwl4965_keyinfo));
3ec47732
EG		 1110 priv->stations[sta_id].sta.key.key_flags =
1111 STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1112 priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
7480513f
EG		 1113 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1114 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
7480513f 1115
2d1bb9e5 1116 if (iwl_is_rfkill(priv)) {
91dd6c27 1117 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled.\n");
2d1bb9e5
RC		 1118 spin_unlock_irqrestore(&priv->sta_lock, flags);
1119 return 0;
1120 }
ccc038ab 1121 ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3ec47732
EG		 1122 spin_unlock_irqrestore(&priv->sta_lock, flags);
1123 return ret;
7480513f 1124}
27aaba0c 1125EXPORT_SYMBOL(iwl_remove_dynamic_key);
7480513f
EG		 1126
1127int iwl_set_dynamic_key(struct iwl_priv *priv,
ccc038ab 1128 struct ieee80211_key_conf *keyconf, u8 sta_id)
7480513f
EG		 1129{
1130 int ret;
1131
ccc038ab
EG		 1132 priv->key_mapping_key++;
1133 keyconf->hw_key_idx = HW_KEY_DYNAMIC;
7480513f 1134
ccc038ab 1135 switch (keyconf->alg) {
7480513f 1136 case ALG_CCMP:
ccc038ab 1137 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
7480513f
EG		 1138 break;
1139 case ALG_TKIP:
ccc038ab 1140 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
7480513f
EG		 1141 break;
1142 case ALG_WEP:
ccc038ab 1143 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
7480513f
EG		 1144 break;
1145 default:
15b1687c
WT		 1146 IWL_ERR(priv,
1147 "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
7480513f
EG		 1148 ret = -EINVAL;
1149 }
1150
e1623446 1151 IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
4564ce8b
EG		 1152 keyconf->alg, keyconf->keylen, keyconf->keyidx,
1153 sta_id, ret);
1154
7480513f
EG		 1155 return ret;
1156}
27aaba0c 1157EXPORT_SYMBOL(iwl_set_dynamic_key);
7480513f 1158
66c73db7
TW		 1159#ifdef CONFIG_IWLWIFI_DEBUG
1160static void iwl_dump_lq_cmd(struct iwl_priv *priv,
1161 struct iwl_link_quality_cmd *lq)
1162{
1163 int i;
e1623446
TW		 1164 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
1165 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
66c73db7
TW		 1166 lq->general_params.single_stream_ant_msk,
1167 lq->general_params.dual_stream_ant_msk);
1168
1169 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
e1623446 1170 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
66c73db7
TW		 1171 i, lq->rs_table[i].rate_n_flags);
1172}
1173#else
1174static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
1175 struct iwl_link_quality_cmd *lq)
1176{
1177}
1178#endif
1179
fe6b23dd
RC		 1180/**
1181 * iwl_send_lq_cmd() - Send link quality command
1182 * @init: This command is sent as part of station initialization right
1183 * after station has been added.
1184 *
1185 * The link quality command is sent as the last step of station creation.
1186 * This is the special case in which init is set and we call a callback in
1187 * this case to clear the state indicating that station creation is in
1188 * progress.
1189 */
66c73db7 1190int iwl_send_lq_cmd(struct iwl_priv *priv,
fe6b23dd 1191 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
66c73db7 1192{
fe6b23dd
RC		 1193 int ret = 0;
1194 unsigned long flags_spin;
1195
66c73db7
TW		 1196 struct iwl_host_cmd cmd = {
1197 .id = REPLY_TX_LINK_QUALITY_CMD,
1198 .len = sizeof(struct iwl_link_quality_cmd),
c2acea8e 1199 .flags = flags,
66c73db7
TW		 1200 .data = lq,
1201 };
1202
76c3c698 1203 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
66c73db7
TW		 1204 return -EINVAL;
1205
3ac7f146 1206 iwl_dump_lq_cmd(priv, lq);
fe6b23dd 1207 BUG_ON(init && (cmd.flags & CMD_ASYNC));
66c73db7 1208
fe6b23dd
RC		 1209 ret = iwl_send_cmd(priv, &cmd);
1210 if (ret || (cmd.flags & CMD_ASYNC))
1211 return ret;
66c73db7 1212
fe6b23dd 1213 if (init) {
91dd6c27 1214 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
fe6b23dd
RC		 1215 lq->sta_id);
1216 spin_lock_irqsave(&priv->sta_lock, flags_spin);
1217 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1218 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1219 }
66c73db7
TW		 1220 return 0;
1221}
1222EXPORT_SYMBOL(iwl_send_lq_cmd);
1223
9a9ca65f
RC		 1224/**
1225 * iwl_add_bcast_station - add broadcast station into station table.
1226 */
1227void iwl_add_bcast_station(struct iwl_priv *priv)
1228{
3459ab5a 1229 IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
fe6b23dd 1230 iwl_add_local_station(priv, iwl_bcast_addr, true);
9a9ca65f
RC		 1231}
1232EXPORT_SYMBOL(iwl_add_bcast_station);
1233
3459ab5a
RC		 1234/**
1235 * iwl3945_add_bcast_station - add broadcast station into station table.
1236 */
1237void iwl3945_add_bcast_station(struct iwl_priv *priv)
1238{
1239 IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
fe6b23dd
RC		 1240 iwl_add_local_station(priv, iwl_bcast_addr, false);
1241 /*
1242 * It is assumed that when station is added more initialization
1243 * needs to be done, but for 3945 it is not the case and we can
1244 * just release station table access right here.
1245 */
1246 priv->stations[priv->hw_params.bcast_sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1247
3459ab5a
RC		 1248}
1249EXPORT_SYMBOL(iwl3945_add_bcast_station);
1250
4f40e4d9
TW		 1251/**
1252 * iwl_get_sta_id - Find station's index within station table
1253 *
1254 * If new IBSS station, create new entry in station table
1255 */
1256int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1257{
1258 int sta_id;
943ab70f 1259 __le16 fc = hdr->frame_control;
4f40e4d9
TW		 1260
1261 /* If this frame is broadcast or management, use broadcast station id */
943ab70f 1262 if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1))
4f40e4d9
TW		 1263 return priv->hw_params.bcast_sta_id;
1264
1265 switch (priv->iw_mode) {
1266
1267 /* If we are a client station in a BSS network, use the special
1268 * AP station entry (that's the only station we communicate with) */
05c914fe 1269 case NL80211_IFTYPE_STATION:
fe6b23dd
RC		 1270 /*
1271 * If addition of station not complete yet, which means
1272 * that rate scaling has not been initialized, then return
1273 * the broadcast station.
1274 */
1275 if (!(priv->stations[IWL_AP_ID].used & IWL_STA_UCODE_ACTIVE))
1276 return priv->hw_params.bcast_sta_id;
4f40e4d9
TW		 1277 return IWL_AP_ID;
1278
1279 /* If we are an AP, then find the station, or use BCAST */
05c914fe 1280 case NL80211_IFTYPE_AP:
c587de0b 1281 sta_id = iwl_find_station(priv, hdr->addr1);
4f40e4d9
TW		 1282 if (sta_id != IWL_INVALID_STATION)
1283 return sta_id;
1284 return priv->hw_params.bcast_sta_id;
1285
1286 /* If this frame is going out to an IBSS network, find the station,
1287 * or create a new station table entry */
05c914fe 1288 case NL80211_IFTYPE_ADHOC:
c587de0b 1289 sta_id = iwl_find_station(priv, hdr->addr1);
4f40e4d9
TW		 1290 if (sta_id != IWL_INVALID_STATION)
1291 return sta_id;
1292
e1623446 1293 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
4f40e4d9 1294 "Defaulting to broadcast...\n",
e174961c 1295 hdr->addr1);
3d816c77 1296 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
4f40e4d9
TW		 1297 return priv->hw_params.bcast_sta_id;
1298
1299 default:
39aadf8c
WT		 1300 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1301 priv->iw_mode);
4f40e4d9
TW		 1302 return priv->hw_params.bcast_sta_id;
1303 }
1304}
1305EXPORT_SYMBOL(iwl_get_sta_id);
1306
5083e563 1307/**
9f58671e 1308 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
5083e563 1309 */
9f58671e 1310void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
5083e563
TW		 1311{
1312 unsigned long flags;
1313
1314 /* Remove "disable" flag, to enable Tx for this TID */
1315 spin_lock_irqsave(&priv->sta_lock, flags);
1316 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1317 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1318 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1319 spin_unlock_irqrestore(&priv->sta_lock, flags);
1320
1321 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1322}
9f58671e
TW		 1323EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1324
1325int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1326 const u8 *addr, int tid, u16 ssn)
1327{
1328 unsigned long flags;
1329 int sta_id;
1330
c587de0b 1331 sta_id = iwl_find_station(priv, addr);
9f58671e
TW		 1332 if (sta_id == IWL_INVALID_STATION)
1333 return -ENXIO;
1334
1335 spin_lock_irqsave(&priv->sta_lock, flags);
1336 priv->stations[sta_id].sta.station_flags_msk = 0;
1337 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1338 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1339 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1340 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1341 spin_unlock_irqrestore(&priv->sta_lock, flags);
1342
1343 return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1344 CMD_ASYNC);
1345}
1346EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1347
1348int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1349{
1350 unsigned long flags;
1351 int sta_id;
1352
c587de0b 1353 sta_id = iwl_find_station(priv, addr);
a2f1cbeb
WYG		 1354 if (sta_id == IWL_INVALID_STATION) {
1355 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
9f58671e 1356 return -ENXIO;
a2f1cbeb 1357 }
9f58671e
TW		 1358
1359 spin_lock_irqsave(&priv->sta_lock, flags);
1360 priv->stations[sta_id].sta.station_flags_msk = 0;
1361 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1362 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1363 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1364 spin_unlock_irqrestore(&priv->sta_lock, flags);
1365
1366 return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1367 CMD_ASYNC);
1368}
1369EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1370
6ab10ff8 1371void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
9f58671e
TW		 1372{
1373 unsigned long flags;
1374
1375 spin_lock_irqsave(&priv->sta_lock, flags);
1376 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1377 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1378 priv->stations[sta_id].sta.sta.modify_mask = 0;
6ab10ff8 1379 priv->stations[sta_id].sta.sleep_tx_count = 0;
9f58671e
TW		 1380 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1381 spin_unlock_irqrestore(&priv->sta_lock, flags);
1382
1383 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1384}
6ab10ff8 1385EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
9f58671e 1386
6ab10ff8 1387void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
9f58671e 1388{
6ab10ff8 1389 unsigned long flags;
9f58671e 1390
6ab10ff8
JB		 1391 spin_lock_irqsave(&priv->sta_lock, flags);
1392 priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1393 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1394 priv->stations[sta_id].sta.sta.modify_mask =
1395 STA_MODIFY_SLEEP_TX_COUNT_MSK;
1396 priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1397 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1398 spin_unlock_irqrestore(&priv->sta_lock, flags);
9f58671e 1399
6ab10ff8 1400 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
9f58671e 1401}
74bcdb33 1402EXPORT_SYMBOL(iwl_sta_modify_sleep_tx_count);
fe6b23dd
RC		 1403
1404int iwl_mac_sta_remove(struct ieee80211_hw *hw,
1405 struct ieee80211_vif *vif,
1406 struct ieee80211_sta *sta)
1407{
1408 int ret;
1409 struct iwl_priv *priv = hw->priv;
1410 IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
1411 sta->addr);
1412 ret = iwl_remove_station(priv, sta);
1413 if (ret)
1414 IWL_ERR(priv, "Error removing station %pM\n",
1415 sta->addr);
1416 return ret;
1417}
1418EXPORT_SYMBOL(iwl_mac_sta_remove);
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