?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
iwlwifi: Legacy isr only used by legacy devices
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn-rxon.c
blobf0ddfb1a9c87876b6f21d3b7ebe7a23038461a2d
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 *****************************************************************************/
26
27 #include "iwl-dev.h"
28 #include "iwl-agn.h"
29 #include "iwl-sta.h"
30 #include "iwl-core.h"
31 #include "iwl-agn-calib.h"
32
33 static int iwlagn_disable_bss(struct iwl_priv *priv,
34 struct iwl_rxon_context *ctx,
35 struct iwl_rxon_cmd *send)
36 {
37 __le32 old_filter = send->filter_flags;
38 int ret;
39
40 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
41 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd, sizeof(*send), send);
42
43 send->filter_flags = old_filter;
44
45 if (ret)
46 IWL_ERR(priv, "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
47
48 return ret;
49 }
50
51 static int iwlagn_disable_pan(struct iwl_priv *priv,
52 struct iwl_rxon_context *ctx,
53 struct iwl_rxon_cmd *send)
54 {
55 __le32 old_filter = send->filter_flags;
56 u8 old_dev_type = send->dev_type;
57 int ret;
58
59 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
60 send->dev_type = RXON_DEV_TYPE_P2P;
61 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd, sizeof(*send), send);
62
63 send->filter_flags = old_filter;
64 send->dev_type = old_dev_type;
65
66 if (ret)
67 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
68
69 /* FIXME: WAIT FOR PAN DISABLE */
70 msleep(300);
71
72 return ret;
73 }
74
75 static int iwlagn_update_beacon(struct iwl_priv *priv,
76 struct ieee80211_vif *vif)
77 {
78 lockdep_assert_held(&priv->mutex);
79
80 dev_kfree_skb(priv->beacon_skb);
81 priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
82 if (!priv->beacon_skb)
83 return -ENOMEM;
84 return iwlagn_send_beacon_cmd(priv);
85 }
86
87 /**
88 * iwlagn_commit_rxon - commit staging_rxon to hardware
89 *
90 * The RXON command in staging_rxon is committed to the hardware and
91 * the active_rxon structure is updated with the new data. This
92 * function correctly transitions out of the RXON_ASSOC_MSK state if
93 * a HW tune is required based on the RXON structure changes.
94 */
95 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
96 {
97 /* cast away the const for active_rxon in this function */
98 struct iwl_rxon_cmd *active = (void *)&ctx->active;
99 bool old_assoc = !!(ctx->active.filter_flags & RXON_FILTER_ASSOC_MSK);
100 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
101 int ret;
102
103 lockdep_assert_held(&priv->mutex);
104
105 if (!iwl_is_alive(priv))
106 return -EBUSY;
107
108 /* This function hardcodes a bunch of dual-mode assumptions */
109 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
110
111 if (!ctx->is_active)
112 return 0;
113
114 /* always get timestamp with Rx frame */
115 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
116
117 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
118 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
119 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
120 else
121 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
122
123 ret = iwl_check_rxon_cmd(priv, ctx);
124 if (ret) {
125 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
126 return -EINVAL;
127 }
128
129 /*
130 * receive commit_rxon request
131 * abort any previous channel switch if still in process
132 */
133 if (priv->switch_rxon.switch_in_progress &&
134 (priv->switch_rxon.channel != ctx->staging.channel)) {
135 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
136 le16_to_cpu(priv->switch_rxon.channel));
137 iwl_chswitch_done(priv, false);
138 }
139
140 /*
141 * If we don't need to send a full RXON, we can use
142 * iwl_rxon_assoc_cmd which is used to reconfigure filter
143 * and other flags for the current radio configuration.
144 */
145 if (!iwl_full_rxon_required(priv, ctx)) {
146 ret = iwl_send_rxon_assoc(priv, ctx);
147 if (ret) {
148 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
149 return ret;
150 }
151
152 memcpy(active, &ctx->staging, sizeof(*active));
153 iwl_print_rx_config_cmd(priv, ctx);
154 return 0;
155 }
156
157 if (priv->cfg->ops->hcmd->set_pan_params) {
158 ret = priv->cfg->ops->hcmd->set_pan_params(priv);
159 if (ret)
160 return ret;
161 }
162
163 iwl_set_rxon_hwcrypto(priv, ctx, !priv->cfg->mod_params->sw_crypto);
164
165 IWL_DEBUG_INFO(priv,
166 "Going to commit RXON\n"
167 " * with%s RXON_FILTER_ASSOC_MSK\n"
168 " * channel = %d\n"
169 " * bssid = %pM\n",
170 (new_assoc ? "" : "out"),
171 le16_to_cpu(ctx->staging.channel),
172 ctx->staging.bssid_addr);
173
174 /*
175 * If we are currently associated and the new config is also
176 * going to be associated, OR if the new config is simply not
177 * associated, clear associated.
178 */
179 if ((old_assoc && new_assoc) || !new_assoc) {
180 struct iwl_rxon_cmd *send = active;
181
182 if (!new_assoc)
183 send = &ctx->staging;
184
185 if (ctx->ctxid == IWL_RXON_CTX_BSS)
186 ret = iwlagn_disable_bss(priv, ctx, send);
187 else
188 ret = iwlagn_disable_pan(priv, ctx, send);
189 if (ret)
190 return ret;
191
192 if (send != active)
193 memcpy(active, send, sizeof(*active));
194
195 /*
196 * Un-assoc RXON clears the station table and WEP
197 * keys, so we have to restore those afterwards.
198 */
199 iwl_clear_ucode_stations(priv, ctx);
200 iwl_restore_stations(priv, ctx);
201 ret = iwl_restore_default_wep_keys(priv, ctx);
202 if (ret) {
203 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
204 return ret;
205 }
206 }
207
208 /* RXON timing must be before associated RXON */
209 ret = iwl_send_rxon_timing(priv, ctx);
210 if (ret) {
211 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
212 return ret;
213 }
214
215 if (new_assoc) {
216 /*
217 * We'll run into this code path when beaconing is
218 * enabled, but then we also need to send the beacon
219 * to the device.
220 */
221 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
222 ret = iwlagn_update_beacon(priv, ctx->vif);
223 if (ret) {
224 IWL_ERR(priv,
225 "Error sending required beacon (%d)!\n",
226 ret);
227 return ret;
228 }
229 }
230
231 priv->start_calib = 0;
232 /*
233 * Apply the new configuration.
234 *
235 * Associated RXON doesn't clear the station table in uCode,
236 * so we don't need to restore stations etc. after this.
237 */
238 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd,
239 sizeof(struct iwl_rxon_cmd), &ctx->staging);
240 if (ret) {
241 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
242 return ret;
243 }
244 memcpy(active, &ctx->staging, sizeof(*active));
245
246 /* IBSS beacon needs to be sent after setting assoc */
247 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
248 if (iwlagn_update_beacon(priv, ctx->vif))
249 IWL_ERR(priv, "Error sending IBSS beacon\n");
250 }
251
252 iwl_print_rx_config_cmd(priv, ctx);
253
254 iwl_init_sensitivity(priv);
255
256 /*
257 * If we issue a new RXON command which required a tune then we must
258 * send a new TXPOWER command or we won't be able to Tx any frames.
259 *
260 * FIXME: which RXON requires a tune? Can we optimise this out in
261 * some cases?
262 */
263 ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
264 if (ret) {
265 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
266 return ret;
267 }
268
269 return 0;
270 }
271
272 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
273 {
274 struct iwl_priv *priv = hw->priv;
275 struct iwl_rxon_context *ctx;
276 struct ieee80211_conf *conf = &hw->conf;
277 struct ieee80211_channel *channel = conf->channel;
278 const struct iwl_channel_info *ch_info;
279 int ret = 0;
280
281 IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
282
283 mutex_lock(&priv->mutex);
284
285 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
286 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
287 goto out;
288 }
289
290 if (!iwl_is_ready(priv)) {
291 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
292 goto out;
293 }
294
295 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
296 IEEE80211_CONF_CHANGE_CHANNEL)) {
297 /* mac80211 uses static for non-HT which is what we want */
298 priv->current_ht_config.smps = conf->smps_mode;
299
300 /*
301 * Recalculate chain counts.
302 *
303 * If monitor mode is enabled then mac80211 will
304 * set up the SM PS mode to OFF if an HT channel is
305 * configured.
306 */
307 if (priv->cfg->ops->hcmd->set_rxon_chain)
308 for_each_context(priv, ctx)
309 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
310 }
311
312 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
313 unsigned long flags;
314
315 ch_info = iwl_get_channel_info(priv, channel->band,
316 channel->hw_value);
317 if (!is_channel_valid(ch_info)) {
318 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
319 ret = -EINVAL;
320 goto out;
321 }
322
323 spin_lock_irqsave(&priv->lock, flags);
324
325 for_each_context(priv, ctx) {
326 /* Configure HT40 channels */
327 ctx->ht.enabled = conf_is_ht(conf);
328 if (ctx->ht.enabled) {
329 if (conf_is_ht40_minus(conf)) {
330 ctx->ht.extension_chan_offset =
331 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
332 ctx->ht.is_40mhz = true;
333 } else if (conf_is_ht40_plus(conf)) {
334 ctx->ht.extension_chan_offset =
335 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
336 ctx->ht.is_40mhz = true;
337 } else {
338 ctx->ht.extension_chan_offset =
339 IEEE80211_HT_PARAM_CHA_SEC_NONE;
340 ctx->ht.is_40mhz = false;
341 }
342 } else
343 ctx->ht.is_40mhz = false;
344
345 /*
346 * Default to no protection. Protection mode will
347 * later be set from BSS config in iwl_ht_conf
348 */
349 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
350
351 /* if we are switching from ht to 2.4 clear flags
352 * from any ht related info since 2.4 does not
353 * support ht */
354 if (le16_to_cpu(ctx->staging.channel) !=
355 channel->hw_value)
356 ctx->staging.flags = 0;
357
358 iwl_set_rxon_channel(priv, channel, ctx);
359 iwl_set_rxon_ht(priv, &priv->current_ht_config);
360
361 iwl_set_flags_for_band(priv, ctx, channel->band,
362 ctx->vif);
363 }
364
365 spin_unlock_irqrestore(&priv->lock, flags);
366
367 iwl_update_bcast_stations(priv);
368
369 /*
370 * The list of supported rates and rate mask can be different
371 * for each band; since the band may have changed, reset
372 * the rate mask to what mac80211 lists.
373 */
374 iwl_set_rate(priv);
375 }
376
377 if (changed & (IEEE80211_CONF_CHANGE_PS |
378 IEEE80211_CONF_CHANGE_IDLE)) {
379 ret = iwl_power_update_mode(priv, false);
380 if (ret)
381 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
382 }
383
384 if (changed & IEEE80211_CONF_CHANGE_POWER) {
385 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
386 priv->tx_power_user_lmt, conf->power_level);
387
388 iwl_set_tx_power(priv, conf->power_level, false);
389 }
390
391 for_each_context(priv, ctx) {
392 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
393 continue;
394 iwlagn_commit_rxon(priv, ctx);
395 }
396 out:
397 mutex_unlock(&priv->mutex);
398 return ret;
399 }
400
401 static void iwlagn_update_qos(struct iwl_priv *priv,
402 struct iwl_rxon_context *ctx)
403 {
404 int ret;
405
406 if (!ctx->is_active)
407 return;
408
409 ctx->qos_data.def_qos_parm.qos_flags = 0;
410
411 if (ctx->qos_data.qos_active)
412 ctx->qos_data.def_qos_parm.qos_flags |=
413 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
414
415 if (ctx->ht.enabled)
416 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
417
418 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
419 ctx->qos_data.qos_active,
420 ctx->qos_data.def_qos_parm.qos_flags);
421
422 ret = iwl_send_cmd_pdu(priv, ctx->qos_cmd,
423 sizeof(struct iwl_qosparam_cmd),
424 &ctx->qos_data.def_qos_parm);
425 if (ret)
426 IWL_ERR(priv, "Failed to update QoS\n");
427 }
428
429 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
430 struct iwl_rxon_context *ctx,
431 struct ieee80211_bss_conf *bss_conf)
432 {
433 struct ieee80211_vif *vif = ctx->vif;
434 struct iwl_rxon_context *tmp;
435 struct ieee80211_sta *sta;
436 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
437 bool need_multiple;
438
439 lockdep_assert_held(&priv->mutex);
440
441 switch (vif->type) {
442 case NL80211_IFTYPE_STATION:
443 rcu_read_lock();
444 sta = ieee80211_find_sta(vif, bss_conf->bssid);
445 if (sta) {
446 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
447 int maxstreams;
448
449 maxstreams = (ht_cap->mcs.tx_params &
450 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
451 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
452 maxstreams += 1;
453
454 if ((ht_cap->mcs.rx_mask[1] == 0) &&
455 (ht_cap->mcs.rx_mask[2] == 0))
456 need_multiple = false;
457 if (maxstreams <= 1)
458 need_multiple = true;
459 } else {
460 /*
461 * If at all, this can only happen through a race
462 * when the AP disconnects us while we're still
463 * setting up the connection, in that case mac80211
464 * will soon tell us about that.
465 */
466 need_multiple = false;
467 }
468 rcu_read_unlock();
469 break;
470 case NL80211_IFTYPE_ADHOC:
471 /* currently */
472 need_multiple = false;
473 break;
474 default:
475 /* only AP really */
476 need_multiple = true;
477 break;
478 }
479
480 ctx->ht_need_multiple_chains = need_multiple;
481
482 if (!need_multiple) {
483 /* check all contexts */
484 for_each_context(priv, tmp) {
485 if (!tmp->vif)
486 continue;
487 if (tmp->ht_need_multiple_chains) {
488 need_multiple = true;
489 break;
490 }
491 }
492 }
493
494 ht_conf->single_chain_sufficient = !need_multiple;
495 }
496
497 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
498 struct ieee80211_vif *vif,
499 struct ieee80211_bss_conf *bss_conf,
500 u32 changes)
501 {
502 struct iwl_priv *priv = hw->priv;
503 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
504 int ret;
505 bool force = false;
506
507 mutex_lock(&priv->mutex);
508
509 if (changes & BSS_CHANGED_BEACON_INT)
510 force = true;
511
512 if (changes & BSS_CHANGED_QOS) {
513 ctx->qos_data.qos_active = bss_conf->qos;
514 iwlagn_update_qos(priv, ctx);
515 }
516
517 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
518 if (vif->bss_conf.use_short_preamble)
519 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
520 else
521 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
522
523 if (changes & BSS_CHANGED_ASSOC) {
524 if (bss_conf->assoc) {
525 iwl_led_associate(priv);
526 priv->timestamp = bss_conf->timestamp;
527 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
528 } else {
529 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
530 iwl_led_disassociate(priv);
531 }
532 }
533
534 if (ctx->ht.enabled) {
535 ctx->ht.protection = bss_conf->ht_operation_mode &
536 IEEE80211_HT_OP_MODE_PROTECTION;
537 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
538 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
539 iwlagn_check_needed_chains(priv, ctx, bss_conf);
540 }
541
542 if (priv->cfg->ops->hcmd->set_rxon_chain)
543 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
544
545 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
546 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
547 else
548 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
549
550 if (bss_conf->use_cts_prot)
551 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
552 else
553 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
554
555 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
556
557 if (vif->type == NL80211_IFTYPE_AP ||
558 vif->type == NL80211_IFTYPE_ADHOC) {
559 if (vif->bss_conf.enable_beacon) {
560 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
561 priv->beacon_ctx = ctx;
562 } else {
563 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
564 priv->beacon_ctx = NULL;
565 }
566 }
567
568 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
569 iwlagn_commit_rxon(priv, ctx);
570
571 if (changes & BSS_CHANGED_IBSS) {
572 ret = iwlagn_manage_ibss_station(priv, vif,
573 bss_conf->ibss_joined);
574 if (ret)
575 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
576 bss_conf->ibss_joined ? "add" : "remove",
577 bss_conf->bssid);
578 }
579
580 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
581 priv->beacon_ctx) {
582 if (iwlagn_update_beacon(priv, vif))
583 IWL_ERR(priv, "Error sending IBSS beacon\n");
584 }
585
586 mutex_unlock(&priv->mutex);
587 }
588
589 void iwlagn_post_scan(struct iwl_priv *priv)
590 {
591 struct iwl_rxon_context *ctx;
592
593 /*
594 * Since setting the RXON may have been deferred while
595 * performing the scan, fire one off if needed
596 */
597 for_each_context(priv, ctx)
598 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
599 iwlagn_commit_rxon(priv, ctx);
600
601 if (priv->cfg->ops->hcmd->set_pan_params)
602 priv->cfg->ops->hcmd->set_pan_params(priv);
603 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree