?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
iwlagn: merge station management functions
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn-sta.c
blobed6283623932e2436ddc364d8429ee085df28249
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2011 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
30 #include <net/mac80211.h>
31
32 #include "iwl-dev.h"
33 #include "iwl-core.h"
34 #include "iwl-agn.h"
35 #include "iwl-trans.h"
36
37 /* priv->shrd->sta_lock must be held */
38 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
39 {
40
41 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
42 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
43 "addr %pM\n",
44 sta_id, priv->stations[sta_id].sta.sta.addr);
45
46 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
47 IWL_DEBUG_ASSOC(priv,
48 "STA id %u addr %pM already present in uCode "
49 "(according to driver)\n",
50 sta_id, priv->stations[sta_id].sta.sta.addr);
51 } else {
52 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
53 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
54 sta_id, priv->stations[sta_id].sta.sta.addr);
55 }
56 }
57
58 static int iwl_process_add_sta_resp(struct iwl_priv *priv,
59 struct iwl_addsta_cmd *addsta,
60 struct iwl_rx_packet *pkt)
61 {
62 u8 sta_id = addsta->sta.sta_id;
63 unsigned long flags;
64 int ret = -EIO;
65
66 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
67 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
68 pkt->hdr.flags);
69 return ret;
70 }
71
72 IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
73 sta_id);
74
75 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
76
77 switch (pkt->u.add_sta.status) {
78 case ADD_STA_SUCCESS_MSK:
79 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
80 iwl_sta_ucode_activate(priv, sta_id);
81 ret = 0;
82 break;
83 case ADD_STA_NO_ROOM_IN_TABLE:
84 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
85 sta_id);
86 break;
87 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
88 IWL_ERR(priv, "Adding station %d failed, no block ack "
89 "resource.\n", sta_id);
90 break;
91 case ADD_STA_MODIFY_NON_EXIST_STA:
92 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
93 sta_id);
94 break;
95 default:
96 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
97 pkt->u.add_sta.status);
98 break;
99 }
100
101 IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
102 priv->stations[sta_id].sta.mode ==
103 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
104 sta_id, priv->stations[sta_id].sta.sta.addr);
105
106 /*
107 * XXX: The MAC address in the command buffer is often changed from
108 * the original sent to the device. That is, the MAC address
109 * written to the command buffer often is not the same MAC address
110 * read from the command buffer when the command returns. This
111 * issue has not yet been resolved and this debugging is left to
112 * observe the problem.
113 */
114 IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
115 priv->stations[sta_id].sta.mode ==
116 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
117 addsta->sta.addr);
118 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
119
120 return ret;
121 }
122
123 int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
124 struct iwl_device_cmd *cmd)
125 {
126 struct iwl_rx_packet *pkt = rxb_addr(rxb);
127 struct iwl_addsta_cmd *addsta =
128 (struct iwl_addsta_cmd *) cmd->payload;
129
130 return iwl_process_add_sta_resp(priv, addsta, pkt);
131 }
132
133 static u16 iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
134 {
135 u16 size = (u16)sizeof(struct iwl_addsta_cmd);
136 struct iwl_addsta_cmd *addsta = (struct iwl_addsta_cmd *)data;
137 memcpy(addsta, cmd, size);
138 /* resrved in 5000 */
139 addsta->rate_n_flags = cpu_to_le16(0);
140 return size;
141 }
142
143 int iwl_send_add_sta(struct iwl_priv *priv,
144 struct iwl_addsta_cmd *sta, u8 flags)
145 {
146 int ret = 0;
147 u8 data[sizeof(*sta)];
148 struct iwl_host_cmd cmd = {
149 .id = REPLY_ADD_STA,
150 .flags = flags,
151 .data = { data, },
152 };
153 u8 sta_id __maybe_unused = sta->sta.sta_id;
154
155 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
156 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
157
158 if (!(flags & CMD_ASYNC)) {
159 cmd.flags |= CMD_WANT_SKB;
160 might_sleep();
161 }
162
163 cmd.len[0] = iwlagn_build_addsta_hcmd(sta, data);
164 ret = iwl_trans_send_cmd(trans(priv), &cmd);
165
166 if (ret || (flags & CMD_ASYNC))
167 return ret;
168 /*else the command was successfully sent in SYNC mode, need to free
169 * the reply page */
170
171 iwl_free_pages(priv->shrd, cmd.reply_page);
172
173 if (cmd.handler_status)
174 IWL_ERR(priv, "%s - error in the CMD response %d", __func__,
175 cmd.handler_status);
176
177 return cmd.handler_status;
178 }
179
180 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
181 struct ieee80211_sta *sta,
182 struct iwl_rxon_context *ctx)
183 {
184 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
185 __le32 sta_flags;
186 u8 mimo_ps_mode;
187
188 if (!sta || !sta_ht_inf->ht_supported)
189 goto done;
190
191 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
192 IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
193 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
194 "static" :
195 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
196 "dynamic" : "disabled");
197
198 sta_flags = priv->stations[index].sta.station_flags;
199
200 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
201
202 switch (mimo_ps_mode) {
203 case WLAN_HT_CAP_SM_PS_STATIC:
204 sta_flags |= STA_FLG_MIMO_DIS_MSK;
205 break;
206 case WLAN_HT_CAP_SM_PS_DYNAMIC:
207 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
208 break;
209 case WLAN_HT_CAP_SM_PS_DISABLED:
210 break;
211 default:
212 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
213 break;
214 }
215
216 sta_flags |= cpu_to_le32(
217 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
218
219 sta_flags |= cpu_to_le32(
220 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
221
222 if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
223 sta_flags |= STA_FLG_HT40_EN_MSK;
224 else
225 sta_flags &= ~STA_FLG_HT40_EN_MSK;
226
227 priv->stations[index].sta.station_flags = sta_flags;
228 done:
229 return;
230 }
231
232 /**
233 * iwl_prep_station - Prepare station information for addition
234 *
235 * should be called with sta_lock held
236 */
237 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
238 const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
239 {
240 struct iwl_station_entry *station;
241 int i;
242 u8 sta_id = IWL_INVALID_STATION;
243
244 if (is_ap)
245 sta_id = ctx->ap_sta_id;
246 else if (is_broadcast_ether_addr(addr))
247 sta_id = ctx->bcast_sta_id;
248 else
249 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
250 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
251 addr)) {
252 sta_id = i;
253 break;
254 }
255
256 if (!priv->stations[i].used &&
257 sta_id == IWL_INVALID_STATION)
258 sta_id = i;
259 }
260
261 /*
262 * These two conditions have the same outcome, but keep them
263 * separate
264 */
265 if (unlikely(sta_id == IWL_INVALID_STATION))
266 return sta_id;
267
268 /*
269 * uCode is not able to deal with multiple requests to add a
270 * station. Keep track if one is in progress so that we do not send
271 * another.
272 */
273 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
274 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
275 "added.\n", sta_id);
276 return sta_id;
277 }
278
279 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
280 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
281 !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
282 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
283 "adding again.\n", sta_id, addr);
284 return sta_id;
285 }
286
287 station = &priv->stations[sta_id];
288 station->used = IWL_STA_DRIVER_ACTIVE;
289 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
290 sta_id, addr);
291 priv->num_stations++;
292
293 /* Set up the REPLY_ADD_STA command to send to device */
294 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
295 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
296 station->sta.mode = 0;
297 station->sta.sta.sta_id = sta_id;
298 station->sta.station_flags = ctx->station_flags;
299 station->ctxid = ctx->ctxid;
300
301 if (sta) {
302 struct iwl_station_priv *sta_priv;
303
304 sta_priv = (void *)sta->drv_priv;
305 sta_priv->ctx = ctx;
306 }
307
308 /*
309 * OK to call unconditionally, since local stations (IBSS BSSID
310 * STA and broadcast STA) pass in a NULL sta, and mac80211
311 * doesn't allow HT IBSS.
312 */
313 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
314
315 return sta_id;
316
317 }
318
319 #define STA_WAIT_TIMEOUT (HZ/2)
320
321 /**
322 * iwl_add_station_common -
323 */
324 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
325 const u8 *addr, bool is_ap,
326 struct ieee80211_sta *sta, u8 *sta_id_r)
327 {
328 unsigned long flags_spin;
329 int ret = 0;
330 u8 sta_id;
331 struct iwl_addsta_cmd sta_cmd;
332
333 *sta_id_r = 0;
334 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
335 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
336 if (sta_id == IWL_INVALID_STATION) {
337 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
338 addr);
339 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
340 return -EINVAL;
341 }
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 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
352 return -EEXIST;
353 }
354
355 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
356 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
357 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
358 "adding again.\n", sta_id, addr);
359 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
360 return -EEXIST;
361 }
362
363 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
364 memcpy(&sta_cmd, &priv->stations[sta_id].sta,
365 sizeof(struct iwl_addsta_cmd));
366 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
367
368 /* Add station to device's station table */
369 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
370 if (ret) {
371 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
372 IWL_ERR(priv, "Adding station %pM failed.\n",
373 priv->stations[sta_id].sta.sta.addr);
374 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
375 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
376 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
377 }
378 *sta_id_r = sta_id;
379 return ret;
380 }
381
382 /**
383 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
384 *
385 * priv->shrd->sta_lock must be held
386 */
387 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
388 {
389 /* Ucode must be active and driver must be non active */
390 if ((priv->stations[sta_id].used &
391 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
392 IWL_STA_UCODE_ACTIVE)
393 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
394
395 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
396
397 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
398 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
399 }
400
401 static int iwl_send_remove_station(struct iwl_priv *priv,
402 const u8 *addr, int sta_id,
403 bool temporary)
404 {
405 struct iwl_rx_packet *pkt;
406 int ret;
407
408 unsigned long flags_spin;
409 struct iwl_rem_sta_cmd rm_sta_cmd;
410
411 struct iwl_host_cmd cmd = {
412 .id = REPLY_REMOVE_STA,
413 .len = { sizeof(struct iwl_rem_sta_cmd), },
414 .flags = CMD_SYNC,
415 .data = { &rm_sta_cmd, },
416 };
417
418 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
419 rm_sta_cmd.num_sta = 1;
420 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
421
422 cmd.flags |= CMD_WANT_SKB;
423
424 ret = iwl_trans_send_cmd(trans(priv), &cmd);
425
426 if (ret)
427 return ret;
428
429 pkt = (struct iwl_rx_packet *)cmd.reply_page;
430 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
431 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
432 pkt->hdr.flags);
433 ret = -EIO;
434 }
435
436 if (!ret) {
437 switch (pkt->u.rem_sta.status) {
438 case REM_STA_SUCCESS_MSK:
439 if (!temporary) {
440 spin_lock_irqsave(&priv->shrd->sta_lock,
441 flags_spin);
442 iwl_sta_ucode_deactivate(priv, sta_id);
443 spin_unlock_irqrestore(&priv->shrd->sta_lock,
444 flags_spin);
445 }
446 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
447 break;
448 default:
449 ret = -EIO;
450 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
451 break;
452 }
453 }
454 iwl_free_pages(priv->shrd, cmd.reply_page);
455
456 return ret;
457 }
458
459 /**
460 * iwl_remove_station - Remove driver's knowledge of station.
461 */
462 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
463 const u8 *addr)
464 {
465 unsigned long flags;
466
467 if (!iwl_is_ready(priv->shrd)) {
468 IWL_DEBUG_INFO(priv,
469 "Unable to remove station %pM, device not ready.\n",
470 addr);
471 /*
472 * It is typical for stations to be removed when we are
473 * going down. Return success since device will be down
474 * soon anyway
475 */
476 return 0;
477 }
478
479 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
480 sta_id, addr);
481
482 if (WARN_ON(sta_id == IWL_INVALID_STATION))
483 return -EINVAL;
484
485 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
486
487 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
488 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
489 addr);
490 goto out_err;
491 }
492
493 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
494 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
495 addr);
496 goto out_err;
497 }
498
499 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
500 kfree(priv->stations[sta_id].lq);
501 priv->stations[sta_id].lq = NULL;
502 }
503
504 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
505
506 priv->num_stations--;
507
508 if (WARN_ON(priv->num_stations < 0))
509 priv->num_stations = 0;
510
511 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
512
513 return iwl_send_remove_station(priv, addr, sta_id, false);
514 out_err:
515 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
516 return -EINVAL;
517 }
518
519 /**
520 * iwl_clear_ucode_stations - clear ucode station table bits
521 *
522 * This function clears all the bits in the driver indicating
523 * which stations are active in the ucode. Call when something
524 * other than explicit station management would cause this in
525 * the ucode, e.g. unassociated RXON.
526 */
527 void iwl_clear_ucode_stations(struct iwl_priv *priv,
528 struct iwl_rxon_context *ctx)
529 {
530 int i;
531 unsigned long flags_spin;
532 bool cleared = false;
533
534 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
535
536 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
537 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
538 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
539 continue;
540
541 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
542 IWL_DEBUG_INFO(priv,
543 "Clearing ucode active for station %d\n", i);
544 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
545 cleared = true;
546 }
547 }
548 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
549
550 if (!cleared)
551 IWL_DEBUG_INFO(priv,
552 "No active stations found to be cleared\n");
553 }
554
555 /**
556 * iwl_restore_stations() - Restore driver known stations to device
557 *
558 * All stations considered active by driver, but not present in ucode, is
559 * restored.
560 *
561 * Function sleeps.
562 */
563 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
564 {
565 struct iwl_addsta_cmd sta_cmd;
566 struct iwl_link_quality_cmd lq;
567 unsigned long flags_spin;
568 int i;
569 bool found = false;
570 int ret;
571 bool send_lq;
572
573 if (!iwl_is_ready(priv->shrd)) {
574 IWL_DEBUG_INFO(priv,
575 "Not ready yet, not restoring any stations.\n");
576 return;
577 }
578
579 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
580 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
581 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
582 if (ctx->ctxid != priv->stations[i].ctxid)
583 continue;
584 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
585 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
586 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
587 priv->stations[i].sta.sta.addr);
588 priv->stations[i].sta.mode = 0;
589 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
590 found = true;
591 }
592 }
593
594 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
595 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
596 memcpy(&sta_cmd, &priv->stations[i].sta,
597 sizeof(struct iwl_addsta_cmd));
598 send_lq = false;
599 if (priv->stations[i].lq) {
600 if (priv->shrd->wowlan)
601 iwl_sta_fill_lq(priv, ctx, i, &lq);
602 else
603 memcpy(&lq, priv->stations[i].lq,
604 sizeof(struct iwl_link_quality_cmd));
605 send_lq = true;
606 }
607 spin_unlock_irqrestore(&priv->shrd->sta_lock,
608 flags_spin);
609 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
610 if (ret) {
611 spin_lock_irqsave(&priv->shrd->sta_lock,
612 flags_spin);
613 IWL_ERR(priv, "Adding station %pM failed.\n",
614 priv->stations[i].sta.sta.addr);
615 priv->stations[i].used &=
616 ~IWL_STA_DRIVER_ACTIVE;
617 priv->stations[i].used &=
618 ~IWL_STA_UCODE_INPROGRESS;
619 spin_unlock_irqrestore(&priv->shrd->sta_lock,
620 flags_spin);
621 }
622 /*
623 * Rate scaling has already been initialized, send
624 * current LQ command
625 */
626 if (send_lq)
627 iwl_send_lq_cmd(priv, ctx, &lq,
628 CMD_SYNC, true);
629 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
630 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
631 }
632 }
633
634 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
635 if (!found)
636 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
637 "no stations to be restored.\n");
638 else
639 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
640 "complete.\n");
641 }
642
643 void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
644 {
645 unsigned long flags;
646 int sta_id = ctx->ap_sta_id;
647 int ret;
648 struct iwl_addsta_cmd sta_cmd;
649 struct iwl_link_quality_cmd lq;
650 bool active;
651
652 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
653 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
654 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
655 return;
656 }
657
658 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
659 sta_cmd.mode = 0;
660 memcpy(&lq, priv->stations[sta_id].lq, sizeof(lq));
661
662 active = priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE;
663 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
664 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
665
666 if (active) {
667 ret = iwl_send_remove_station(
668 priv, priv->stations[sta_id].sta.sta.addr,
669 sta_id, true);
670 if (ret)
671 IWL_ERR(priv, "failed to remove STA %pM (%d)\n",
672 priv->stations[sta_id].sta.sta.addr, ret);
673 }
674 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
675 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
676 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
677
678 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
679 if (ret)
680 IWL_ERR(priv, "failed to re-add STA %pM (%d)\n",
681 priv->stations[sta_id].sta.sta.addr, ret);
682 iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true);
683 }
684
685 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
686 {
687 int i;
688
689 for (i = 0; i < priv->sta_key_max_num; i++)
690 if (!test_and_set_bit(i, &priv->ucode_key_table))
691 return i;
692
693 return WEP_INVALID_OFFSET;
694 }
695
696 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
697 {
698 unsigned long flags;
699 int i;
700
701 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
702 for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
703 if (!(priv->stations[i].used & IWL_STA_BCAST))
704 continue;
705
706 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
707 priv->num_stations--;
708 if (WARN_ON(priv->num_stations < 0))
709 priv->num_stations = 0;
710 kfree(priv->stations[i].lq);
711 priv->stations[i].lq = NULL;
712 }
713 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
714 }
715
716 #ifdef CONFIG_IWLWIFI_DEBUG
717 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
718 struct iwl_link_quality_cmd *lq)
719 {
720 int i;
721 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
722 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
723 lq->general_params.single_stream_ant_msk,
724 lq->general_params.dual_stream_ant_msk);
725
726 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
727 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
728 i, lq->rs_table[i].rate_n_flags);
729 }
730 #else
731 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
732 struct iwl_link_quality_cmd *lq)
733 {
734 }
735 #endif
736
737 /**
738 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
739 *
740 * It sometimes happens when a HT rate has been in use and we
741 * loose connectivity with AP then mac80211 will first tell us that the
742 * current channel is not HT anymore before removing the station. In such a
743 * scenario the RXON flags will be updated to indicate we are not
744 * communicating HT anymore, but the LQ command may still contain HT rates.
745 * Test for this to prevent driver from sending LQ command between the time
746 * RXON flags are updated and when LQ command is updated.
747 */
748 static bool is_lq_table_valid(struct iwl_priv *priv,
749 struct iwl_rxon_context *ctx,
750 struct iwl_link_quality_cmd *lq)
751 {
752 int i;
753
754 if (ctx->ht.enabled)
755 return true;
756
757 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
758 ctx->active.channel);
759 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
760 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
761 RATE_MCS_HT_MSK) {
762 IWL_DEBUG_INFO(priv,
763 "index %d of LQ expects HT channel\n",
764 i);
765 return false;
766 }
767 }
768 return true;
769 }
770
771 /**
772 * iwl_send_lq_cmd() - Send link quality command
773 * @init: This command is sent as part of station initialization right
774 * after station has been added.
775 *
776 * The link quality command is sent as the last step of station creation.
777 * This is the special case in which init is set and we call a callback in
778 * this case to clear the state indicating that station creation is in
779 * progress.
780 */
781 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
782 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
783 {
784 int ret = 0;
785 unsigned long flags_spin;
786
787 struct iwl_host_cmd cmd = {
788 .id = REPLY_TX_LINK_QUALITY_CMD,
789 .len = { sizeof(struct iwl_link_quality_cmd), },
790 .flags = flags,
791 .data = { lq, },
792 };
793
794 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
795 return -EINVAL;
796
797
798 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
799 if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
800 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
801 return -EINVAL;
802 }
803 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
804
805 iwl_dump_lq_cmd(priv, lq);
806 if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
807 return -EINVAL;
808
809 if (is_lq_table_valid(priv, ctx, lq))
810 ret = iwl_trans_send_cmd(trans(priv), &cmd);
811 else
812 ret = -EINVAL;
813
814 if (cmd.flags & CMD_ASYNC)
815 return ret;
816
817 if (init) {
818 IWL_DEBUG_INFO(priv, "init LQ command complete, "
819 "clearing sta addition status for sta %d\n",
820 lq->sta_id);
821 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
822 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
823 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
824 }
825 return ret;
826 }
827
828 int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
829 struct ieee80211_vif *vif,
830 struct ieee80211_sta *sta)
831 {
832 struct iwl_priv *priv = hw->priv;
833 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
834 int ret;
835
836 IWL_DEBUG_MAC80211(priv, "enter: received request to remove "
837 "station %pM\n", sta->addr);
838 mutex_lock(&priv->shrd->mutex);
839 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
840 sta->addr);
841 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
842 if (ret)
843 IWL_ERR(priv, "Error removing station %pM\n",
844 sta->addr);
845 mutex_unlock(&priv->shrd->mutex);
846 IWL_DEBUG_MAC80211(priv, "leave\n");
847
848 return ret;
849 }
850
851 void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
852 u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
853 {
854 int i, r;
855 u32 rate_flags = 0;
856 __le32 rate_n_flags;
857
858 lockdep_assert_held(&priv->shrd->mutex);
859
860 memset(link_cmd, 0, sizeof(*link_cmd));
861
862 /* Set up the rate scaling to start at selected rate, fall back
863 * all the way down to 1M in IEEE order, and then spin on 1M */
864 if (priv->band == IEEE80211_BAND_5GHZ)
865 r = IWL_RATE_6M_INDEX;
866 else if (ctx && ctx->vif && ctx->vif->p2p)
867 r = IWL_RATE_6M_INDEX;
868 else
869 r = IWL_RATE_1M_INDEX;
870
871 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
872 rate_flags |= RATE_MCS_CCK_MSK;
873
874 rate_flags |= first_antenna(hw_params(priv).valid_tx_ant) <<
875 RATE_MCS_ANT_POS;
876 rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
877 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
878 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
879
880 link_cmd->general_params.single_stream_ant_msk =
881 first_antenna(hw_params(priv).valid_tx_ant);
882
883 link_cmd->general_params.dual_stream_ant_msk =
884 hw_params(priv).valid_tx_ant &
885 ~first_antenna(hw_params(priv).valid_tx_ant);
886 if (!link_cmd->general_params.dual_stream_ant_msk) {
887 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
888 } else if (num_of_ant(hw_params(priv).valid_tx_ant) == 2) {
889 link_cmd->general_params.dual_stream_ant_msk =
890 hw_params(priv).valid_tx_ant;
891 }
892
893 link_cmd->agg_params.agg_dis_start_th =
894 LINK_QUAL_AGG_DISABLE_START_DEF;
895 link_cmd->agg_params.agg_time_limit =
896 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
897
898 link_cmd->sta_id = sta_id;
899 }
900
901 static struct iwl_link_quality_cmd *
902 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
903 u8 sta_id)
904 {
905 struct iwl_link_quality_cmd *link_cmd;
906
907 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
908 if (!link_cmd) {
909 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
910 return NULL;
911 }
912
913 iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
914
915 return link_cmd;
916 }
917
918 /*
919 * iwlagn_add_bssid_station - Add the special IBSS BSSID station
920 *
921 * Function sleeps.
922 */
923 int iwlagn_add_bssid_station(struct iwl_priv *priv,
924 struct iwl_rxon_context *ctx,
925 const u8 *addr, u8 *sta_id_r)
926 {
927 int ret;
928 u8 sta_id;
929 struct iwl_link_quality_cmd *link_cmd;
930 unsigned long flags;
931
932 if (sta_id_r)
933 *sta_id_r = IWL_INVALID_STATION;
934
935 ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
936 if (ret) {
937 IWL_ERR(priv, "Unable to add station %pM\n", addr);
938 return ret;
939 }
940
941 if (sta_id_r)
942 *sta_id_r = sta_id;
943
944 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
945 priv->stations[sta_id].used |= IWL_STA_LOCAL;
946 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
947
948 /* Set up default rate scaling table in device's station table */
949 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
950 if (!link_cmd) {
951 IWL_ERR(priv,
952 "Unable to initialize rate scaling for station %pM.\n",
953 addr);
954 return -ENOMEM;
955 }
956
957 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true);
958 if (ret)
959 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
960
961 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
962 priv->stations[sta_id].lq = link_cmd;
963 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
964
965 return 0;
966 }
967
968 /*
969 * static WEP keys
970 *
971 * For each context, the device has a table of 4 static WEP keys
972 * (one for each key index) that is updated with the following
973 * commands.
974 */
975
976 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
977 struct iwl_rxon_context *ctx,
978 bool send_if_empty)
979 {
980 int i, not_empty = 0;
981 u8 buff[sizeof(struct iwl_wep_cmd) +
982 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
983 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
984 size_t cmd_size = sizeof(struct iwl_wep_cmd);
985 struct iwl_host_cmd cmd = {
986 .id = ctx->wep_key_cmd,
987 .data = { wep_cmd, },
988 .flags = CMD_SYNC,
989 };
990
991 might_sleep();
992
993 memset(wep_cmd, 0, cmd_size +
994 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
995
996 for (i = 0; i < WEP_KEYS_MAX ; i++) {
997 wep_cmd->key[i].key_index = i;
998 if (ctx->wep_keys[i].key_size) {
999 wep_cmd->key[i].key_offset = i;
1000 not_empty = 1;
1001 } else {
1002 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
1003 }
1004
1005 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
1006 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
1007 ctx->wep_keys[i].key_size);
1008 }
1009
1010 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
1011 wep_cmd->num_keys = WEP_KEYS_MAX;
1012
1013 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
1014
1015 cmd.len[0] = cmd_size;
1016
1017 if (not_empty || send_if_empty)
1018 return iwl_trans_send_cmd(trans(priv), &cmd);
1019 else
1020 return 0;
1021 }
1022
1023 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
1024 struct iwl_rxon_context *ctx)
1025 {
1026 lockdep_assert_held(&priv->shrd->mutex);
1027
1028 return iwl_send_static_wepkey_cmd(priv, ctx, false);
1029 }
1030
1031 int iwl_remove_default_wep_key(struct iwl_priv *priv,
1032 struct iwl_rxon_context *ctx,
1033 struct ieee80211_key_conf *keyconf)
1034 {
1035 int ret;
1036
1037 lockdep_assert_held(&priv->shrd->mutex);
1038
1039 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1040 keyconf->keyidx);
1041
1042 memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1043 if (iwl_is_rfkill(priv->shrd)) {
1044 IWL_DEBUG_WEP(priv,
1045 "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1046 /* but keys in device are clear anyway so return success */
1047 return 0;
1048 }
1049 ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1050 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1051 keyconf->keyidx, ret);
1052
1053 return ret;
1054 }
1055
1056 int iwl_set_default_wep_key(struct iwl_priv *priv,
1057 struct iwl_rxon_context *ctx,
1058 struct ieee80211_key_conf *keyconf)
1059 {
1060 int ret;
1061
1062 lockdep_assert_held(&priv->shrd->mutex);
1063
1064 if (keyconf->keylen != WEP_KEY_LEN_128 &&
1065 keyconf->keylen != WEP_KEY_LEN_64) {
1066 IWL_DEBUG_WEP(priv,
1067 "Bad WEP key length %d\n", keyconf->keylen);
1068 return -EINVAL;
1069 }
1070
1071 keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1072
1073 ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1074 memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1075 keyconf->keylen);
1076
1077 ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1078 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1079 keyconf->keylen, keyconf->keyidx, ret);
1080
1081 return ret;
1082 }
1083
1084 /*
1085 * dynamic (per-station) keys
1086 *
1087 * The dynamic keys are a little more complicated. The device has
1088 * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1089 * These are linked to stations by a table that contains an index
1090 * into the key table for each station/key index/{mcast,unicast},
1091 * i.e. it's basically an array of pointers like this:
1092 * key_offset_t key_mapping[NUM_STATIONS][4][2];
1093 * (it really works differently, but you can think of it as such)
1094 *
1095 * The key uploading and linking happens in the same command, the
1096 * add station command with STA_MODIFY_KEY_MASK.
1097 */
1098
1099 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1100 struct ieee80211_vif *vif,
1101 struct ieee80211_sta *sta)
1102 {
1103 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1104 u8 sta_id = IWL_INVALID_STATION;
1105
1106 if (sta)
1107 sta_id = iwl_sta_id(sta);
1108
1109 /*
1110 * The device expects GTKs for station interfaces to be
1111 * installed as GTKs for the AP station. If we have no
1112 * station ID, then use the ap_sta_id in that case.
1113 */
1114 if (!sta && vif && vif_priv->ctx) {
1115 switch (vif->type) {
1116 case NL80211_IFTYPE_STATION:
1117 sta_id = vif_priv->ctx->ap_sta_id;
1118 break;
1119 default:
1120 /*
1121 * In all other cases, the key will be
1122 * used either for TX only or is bound
1123 * to a station already.
1124 */
1125 break;
1126 }
1127 }
1128
1129 return sta_id;
1130 }
1131
1132 static int iwlagn_send_sta_key(struct iwl_priv *priv,
1133 struct ieee80211_key_conf *keyconf,
1134 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1135 u32 cmd_flags)
1136 {
1137 unsigned long flags;
1138 __le16 key_flags;
1139 struct iwl_addsta_cmd sta_cmd;
1140 int i;
1141
1142 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1143 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1144 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1145
1146 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1147 key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1148
1149 switch (keyconf->cipher) {
1150 case WLAN_CIPHER_SUITE_CCMP:
1151 key_flags |= STA_KEY_FLG_CCMP;
1152 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1153 break;
1154 case WLAN_CIPHER_SUITE_TKIP:
1155 key_flags |= STA_KEY_FLG_TKIP;
1156 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1157 for (i = 0; i < 5; i++)
1158 sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1159 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1160 break;
1161 case WLAN_CIPHER_SUITE_WEP104:
1162 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1163 /* fall through */
1164 case WLAN_CIPHER_SUITE_WEP40:
1165 key_flags |= STA_KEY_FLG_WEP;
1166 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1167 break;
1168 default:
1169 WARN_ON(1);
1170 return -EINVAL;
1171 }
1172
1173 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1174 key_flags |= STA_KEY_MULTICAST_MSK;
1175
1176 /* key pointer (offset) */
1177 sta_cmd.key.key_offset = keyconf->hw_key_idx;
1178
1179 sta_cmd.key.key_flags = key_flags;
1180 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1181 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1182
1183 return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1184 }
1185
1186 void iwl_update_tkip_key(struct iwl_priv *priv,
1187 struct ieee80211_vif *vif,
1188 struct ieee80211_key_conf *keyconf,
1189 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1190 {
1191 u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1192
1193 if (sta_id == IWL_INVALID_STATION)
1194 return;
1195
1196 if (iwl_scan_cancel(priv)) {
1197 /* cancel scan failed, just live w/ bad key and rely
1198 briefly on SW decryption */
1199 return;
1200 }
1201
1202 iwlagn_send_sta_key(priv, keyconf, sta_id,
1203 iv32, phase1key, CMD_ASYNC);
1204 }
1205
1206 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1207 struct iwl_rxon_context *ctx,
1208 struct ieee80211_key_conf *keyconf,
1209 struct ieee80211_sta *sta)
1210 {
1211 unsigned long flags;
1212 struct iwl_addsta_cmd sta_cmd;
1213 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1214
1215 /* if station isn't there, neither is the key */
1216 if (sta_id == IWL_INVALID_STATION)
1217 return -ENOENT;
1218
1219 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1220 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1221 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1222 sta_id = IWL_INVALID_STATION;
1223 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1224
1225 if (sta_id == IWL_INVALID_STATION)
1226 return 0;
1227
1228 lockdep_assert_held(&priv->shrd->mutex);
1229
1230 ctx->key_mapping_keys--;
1231
1232 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1233 keyconf->keyidx, sta_id);
1234
1235 if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1236 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1237 keyconf->hw_key_idx);
1238
1239 sta_cmd.key.key_flags = STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1240 sta_cmd.key.key_offset = WEP_INVALID_OFFSET;
1241 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1242 sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1243
1244 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1245 }
1246
1247 int iwl_set_dynamic_key(struct iwl_priv *priv,
1248 struct iwl_rxon_context *ctx,
1249 struct ieee80211_key_conf *keyconf,
1250 struct ieee80211_sta *sta)
1251 {
1252 struct ieee80211_key_seq seq;
1253 u16 p1k[5];
1254 int ret;
1255 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1256 const u8 *addr;
1257
1258 if (sta_id == IWL_INVALID_STATION)
1259 return -EINVAL;
1260
1261 lockdep_assert_held(&priv->shrd->mutex);
1262
1263 keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1264 if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1265 return -ENOSPC;
1266
1267 ctx->key_mapping_keys++;
1268
1269 switch (keyconf->cipher) {
1270 case WLAN_CIPHER_SUITE_TKIP:
1271 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1272 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1273
1274 if (sta)
1275 addr = sta->addr;
1276 else /* station mode case only */
1277 addr = ctx->active.bssid_addr;
1278
1279 /* pre-fill phase 1 key into device cache */
1280 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1281 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1282 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1283 seq.tkip.iv32, p1k, CMD_SYNC);
1284 break;
1285 case WLAN_CIPHER_SUITE_CCMP:
1286 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1287 /* fall through */
1288 case WLAN_CIPHER_SUITE_WEP40:
1289 case WLAN_CIPHER_SUITE_WEP104:
1290 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1291 0, NULL, CMD_SYNC);
1292 break;
1293 default:
1294 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1295 ret = -EINVAL;
1296 }
1297
1298 if (ret) {
1299 ctx->key_mapping_keys--;
1300 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1301 }
1302
1303 IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1304 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1305 sta ? sta->addr : NULL, ret);
1306
1307 return ret;
1308 }
1309
1310 /**
1311 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1312 *
1313 * This adds the broadcast station into the driver's station table
1314 * and marks it driver active, so that it will be restored to the
1315 * device at the next best time.
1316 */
1317 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1318 struct iwl_rxon_context *ctx)
1319 {
1320 struct iwl_link_quality_cmd *link_cmd;
1321 unsigned long flags;
1322 u8 sta_id;
1323
1324 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1325 sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1326 if (sta_id == IWL_INVALID_STATION) {
1327 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1328 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1329
1330 return -EINVAL;
1331 }
1332
1333 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1334 priv->stations[sta_id].used |= IWL_STA_BCAST;
1335 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1336
1337 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1338 if (!link_cmd) {
1339 IWL_ERR(priv,
1340 "Unable to initialize rate scaling for bcast station.\n");
1341 return -ENOMEM;
1342 }
1343
1344 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1345 priv->stations[sta_id].lq = link_cmd;
1346 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1347
1348 return 0;
1349 }
1350
1351 /**
1352 * iwl_update_bcast_station - update broadcast station's LQ command
1353 *
1354 * Only used by iwlagn. Placed here to have all bcast station management
1355 * code together.
1356 */
1357 int iwl_update_bcast_station(struct iwl_priv *priv,
1358 struct iwl_rxon_context *ctx)
1359 {
1360 unsigned long flags;
1361 struct iwl_link_quality_cmd *link_cmd;
1362 u8 sta_id = ctx->bcast_sta_id;
1363
1364 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1365 if (!link_cmd) {
1366 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1367 return -ENOMEM;
1368 }
1369
1370 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1371 if (priv->stations[sta_id].lq)
1372 kfree(priv->stations[sta_id].lq);
1373 else
1374 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1375 priv->stations[sta_id].lq = link_cmd;
1376 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1377
1378 return 0;
1379 }
1380
1381 int iwl_update_bcast_stations(struct iwl_priv *priv)
1382 {
1383 struct iwl_rxon_context *ctx;
1384 int ret = 0;
1385
1386 for_each_context(priv, ctx) {
1387 ret = iwl_update_bcast_station(priv, ctx);
1388 if (ret)
1389 break;
1390 }
1391
1392 return ret;
1393 }
1394
1395 /**
1396 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1397 */
1398 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1399 {
1400 unsigned long flags;
1401 struct iwl_addsta_cmd sta_cmd;
1402
1403 lockdep_assert_held(&priv->shrd->mutex);
1404
1405 /* Remove "disable" flag, to enable Tx for this TID */
1406 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1407 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1408 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1409 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1410 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1411 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1412
1413 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1414 }
1415
1416 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1417 int tid, u16 ssn)
1418 {
1419 unsigned long flags;
1420 int sta_id;
1421 struct iwl_addsta_cmd sta_cmd;
1422
1423 lockdep_assert_held(&priv->shrd->mutex);
1424
1425 sta_id = iwl_sta_id(sta);
1426 if (sta_id == IWL_INVALID_STATION)
1427 return -ENXIO;
1428
1429 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1430 priv->stations[sta_id].sta.station_flags_msk = 0;
1431 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1432 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1433 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1434 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1435 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1436 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1437
1438 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1439 }
1440
1441 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1442 int tid)
1443 {
1444 unsigned long flags;
1445 int sta_id;
1446 struct iwl_addsta_cmd sta_cmd;
1447
1448 lockdep_assert_held(&priv->shrd->mutex);
1449
1450 sta_id = iwl_sta_id(sta);
1451 if (sta_id == IWL_INVALID_STATION) {
1452 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1453 return -ENXIO;
1454 }
1455
1456 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1457 priv->stations[sta_id].sta.station_flags_msk = 0;
1458 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1459 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1460 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1461 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1462 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1463
1464 return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1465 }
1466
1467 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1468 {
1469 unsigned long flags;
1470
1471 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1472 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1473 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1474 priv->stations[sta_id].sta.sta.modify_mask = 0;
1475 priv->stations[sta_id].sta.sleep_tx_count = 0;
1476 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1477 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1478 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1479
1480 }
1481
1482 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1483 {
1484 unsigned long flags;
1485
1486 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1487 priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1488 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1489 priv->stations[sta_id].sta.sta.modify_mask =
1490 STA_MODIFY_SLEEP_TX_COUNT_MSK;
1491 priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1492 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1493 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1494 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1495
1496 }
1497
1498 void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1499 struct ieee80211_vif *vif,
1500 enum sta_notify_cmd cmd,
1501 struct ieee80211_sta *sta)
1502 {
1503 struct iwl_priv *priv = hw->priv;
1504 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1505 int sta_id;
1506
1507 IWL_DEBUG_MAC80211(priv, "enter\n");
1508
1509 switch (cmd) {
1510 case STA_NOTIFY_SLEEP:
1511 WARN_ON(!sta_priv->client);
1512 sta_priv->asleep = true;
1513 if (atomic_read(&sta_priv->pending_frames) > 0)
1514 ieee80211_sta_block_awake(hw, sta, true);
1515 break;
1516 case STA_NOTIFY_AWAKE:
1517 WARN_ON(!sta_priv->client);
1518 if (!sta_priv->asleep)
1519 break;
1520 sta_priv->asleep = false;
1521 sta_id = iwl_sta_id(sta);
1522 if (sta_id != IWL_INVALID_STATION)
1523 iwl_sta_modify_ps_wake(priv, sta_id);
1524 break;
1525 default:
1526 break;
1527 }
1528 IWL_DEBUG_MAC80211(priv, "leave\n");
1529 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree