1 /******************************************************************************
3 * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
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.
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
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
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *****************************************************************************/
31 #include "iwl-agn-calib.h"
33 static int iwlagn_disable_bss(struct iwl_priv
*priv
,
34 struct iwl_rxon_context
*ctx
,
35 struct iwl_rxon_cmd
*send
)
37 __le32 old_filter
= send
->filter_flags
;
40 send
->filter_flags
&= ~RXON_FILTER_ASSOC_MSK
;
41 ret
= iwl_send_cmd_pdu(priv
, ctx
->rxon_cmd
, sizeof(*send
), send
);
43 send
->filter_flags
= old_filter
;
46 IWL_ERR(priv
, "Error clearing ASSOC_MSK on BSS (%d)\n", ret
);
51 static int iwlagn_disable_pan(struct iwl_priv
*priv
,
52 struct iwl_rxon_context
*ctx
,
53 struct iwl_rxon_cmd
*send
)
55 struct iwl_notification_wait disable_wait
;
56 __le32 old_filter
= send
->filter_flags
;
57 u8 old_dev_type
= send
->dev_type
;
60 iwlagn_init_notification_wait(priv
, &disable_wait
, NULL
,
61 REPLY_WIPAN_DEACTIVATION_COMPLETE
);
63 send
->filter_flags
&= ~RXON_FILTER_ASSOC_MSK
;
64 send
->dev_type
= RXON_DEV_TYPE_P2P
;
65 ret
= iwl_send_cmd_pdu(priv
, ctx
->rxon_cmd
, sizeof(*send
), send
);
67 send
->filter_flags
= old_filter
;
68 send
->dev_type
= old_dev_type
;
71 IWL_ERR(priv
, "Error disabling PAN (%d)\n", ret
);
72 iwlagn_remove_notification(priv
, &disable_wait
);
76 wait_res
= iwlagn_wait_notification(priv
, &disable_wait
, HZ
);
78 IWL_ERR(priv
, "Timed out waiting for PAN disable\n");
86 static void iwlagn_update_qos(struct iwl_priv
*priv
,
87 struct iwl_rxon_context
*ctx
)
94 ctx
->qos_data
.def_qos_parm
.qos_flags
= 0;
96 if (ctx
->qos_data
.qos_active
)
97 ctx
->qos_data
.def_qos_parm
.qos_flags
|=
98 QOS_PARAM_FLG_UPDATE_EDCA_MSK
;
101 ctx
->qos_data
.def_qos_parm
.qos_flags
|= QOS_PARAM_FLG_TGN_MSK
;
103 IWL_DEBUG_QOS(priv
, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
104 ctx
->qos_data
.qos_active
,
105 ctx
->qos_data
.def_qos_parm
.qos_flags
);
107 ret
= iwl_send_cmd_pdu(priv
, ctx
->qos_cmd
,
108 sizeof(struct iwl_qosparam_cmd
),
109 &ctx
->qos_data
.def_qos_parm
);
111 IWL_ERR(priv
, "Failed to update QoS\n");
114 static int iwlagn_update_beacon(struct iwl_priv
*priv
,
115 struct ieee80211_vif
*vif
)
117 lockdep_assert_held(&priv
->mutex
);
119 dev_kfree_skb(priv
->beacon_skb
);
120 priv
->beacon_skb
= ieee80211_beacon_get(priv
->hw
, vif
);
121 if (!priv
->beacon_skb
)
123 return iwlagn_send_beacon_cmd(priv
);
127 * iwlagn_commit_rxon - commit staging_rxon to hardware
129 * The RXON command in staging_rxon is committed to the hardware and
130 * the active_rxon structure is updated with the new data. This
131 * function correctly transitions out of the RXON_ASSOC_MSK state if
132 * a HW tune is required based on the RXON structure changes.
134 int iwlagn_commit_rxon(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
)
136 /* cast away the const for active_rxon in this function */
137 struct iwl_rxon_cmd
*active
= (void *)&ctx
->active
;
138 bool new_assoc
= !!(ctx
->staging
.filter_flags
& RXON_FILTER_ASSOC_MSK
);
139 bool old_assoc
= !!(ctx
->active
.filter_flags
& RXON_FILTER_ASSOC_MSK
);
142 lockdep_assert_held(&priv
->mutex
);
144 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
))
147 if (!iwl_is_alive(priv
))
150 /* This function hardcodes a bunch of dual-mode assumptions */
151 BUILD_BUG_ON(NUM_IWL_RXON_CTX
!= 2);
156 /* always get timestamp with Rx frame */
157 ctx
->staging
.flags
|= RXON_FLG_TSF2HOST_MSK
;
159 if (ctx
->ctxid
== IWL_RXON_CTX_PAN
&& priv
->_agn
.hw_roc_channel
) {
160 struct ieee80211_channel
*chan
= priv
->_agn
.hw_roc_channel
;
162 iwl_set_rxon_channel(priv
, chan
, ctx
);
163 iwl_set_flags_for_band(priv
, ctx
, chan
->band
, NULL
);
164 ctx
->staging
.filter_flags
|=
165 RXON_FILTER_ASSOC_MSK
|
166 RXON_FILTER_PROMISC_MSK
|
167 RXON_FILTER_CTL2HOST_MSK
;
168 ctx
->staging
.dev_type
= RXON_DEV_TYPE_P2P
;
171 if (memcmp(&ctx
->staging
, &ctx
->active
,
172 sizeof(ctx
->staging
)) == 0)
176 if ((ctx
->vif
&& ctx
->vif
->bss_conf
.use_short_slot
) ||
177 !(ctx
->staging
.flags
& RXON_FLG_BAND_24G_MSK
))
178 ctx
->staging
.flags
|= RXON_FLG_SHORT_SLOT_MSK
;
180 ctx
->staging
.flags
&= ~RXON_FLG_SHORT_SLOT_MSK
;
182 ret
= iwl_check_rxon_cmd(priv
, ctx
);
184 IWL_ERR(priv
, "Invalid RXON configuration. Not committing.\n");
189 * receive commit_rxon request
190 * abort any previous channel switch if still in process
192 if (priv
->switch_rxon
.switch_in_progress
&&
193 (priv
->switch_rxon
.channel
!= ctx
->staging
.channel
)) {
194 IWL_DEBUG_11H(priv
, "abort channel switch on %d\n",
195 le16_to_cpu(priv
->switch_rxon
.channel
));
196 iwl_chswitch_done(priv
, false);
200 * If we don't need to send a full RXON, we can use
201 * iwl_rxon_assoc_cmd which is used to reconfigure filter
202 * and other flags for the current radio configuration.
204 if (!iwl_full_rxon_required(priv
, ctx
)) {
205 ret
= iwl_send_rxon_assoc(priv
, ctx
);
207 IWL_ERR(priv
, "Error setting RXON_ASSOC (%d)\n", ret
);
211 memcpy(active
, &ctx
->staging
, sizeof(*active
));
212 iwl_print_rx_config_cmd(priv
, ctx
);
216 if (priv
->cfg
->ops
->hcmd
->set_pan_params
) {
217 ret
= priv
->cfg
->ops
->hcmd
->set_pan_params(priv
);
222 iwl_set_rxon_hwcrypto(priv
, ctx
, !priv
->cfg
->mod_params
->sw_crypto
);
225 "Going to commit RXON\n"
226 " * with%s RXON_FILTER_ASSOC_MSK\n"
229 (new_assoc
? "" : "out"),
230 le16_to_cpu(ctx
->staging
.channel
),
231 ctx
->staging
.bssid_addr
);
234 * Always clear associated first, but with the correct config.
235 * This is required as for example station addition for the
236 * AP station must be done after the BSSID is set to correctly
237 * set up filters in the device.
239 if ((old_assoc
&& new_assoc
) || !new_assoc
) {
240 if (ctx
->ctxid
== IWL_RXON_CTX_BSS
)
241 ret
= iwlagn_disable_bss(priv
, ctx
, &ctx
->staging
);
243 ret
= iwlagn_disable_pan(priv
, ctx
, &ctx
->staging
);
247 memcpy(active
, &ctx
->staging
, sizeof(*active
));
250 * Un-assoc RXON clears the station table and WEP
251 * keys, so we have to restore those afterwards.
253 iwl_clear_ucode_stations(priv
, ctx
);
254 iwl_restore_stations(priv
, ctx
);
255 ret
= iwl_restore_default_wep_keys(priv
, ctx
);
257 IWL_ERR(priv
, "Failed to restore WEP keys (%d)\n", ret
);
262 /* RXON timing must be before associated RXON */
263 ret
= iwl_send_rxon_timing(priv
, ctx
);
265 IWL_ERR(priv
, "Failed to send timing (%d)!\n", ret
);
270 /* QoS info may be cleared by previous un-assoc RXON */
271 iwlagn_update_qos(priv
, ctx
);
274 * We'll run into this code path when beaconing is
275 * enabled, but then we also need to send the beacon
278 if (ctx
->vif
&& (ctx
->vif
->type
== NL80211_IFTYPE_AP
)) {
279 ret
= iwlagn_update_beacon(priv
, ctx
->vif
);
282 "Error sending required beacon (%d)!\n",
288 priv
->start_calib
= 0;
290 * Apply the new configuration.
292 * Associated RXON doesn't clear the station table in uCode,
293 * so we don't need to restore stations etc. after this.
295 ret
= iwl_send_cmd_pdu(priv
, ctx
->rxon_cmd
,
296 sizeof(struct iwl_rxon_cmd
), &ctx
->staging
);
298 IWL_ERR(priv
, "Error setting new RXON (%d)\n", ret
);
301 memcpy(active
, &ctx
->staging
, sizeof(*active
));
303 iwl_reprogram_ap_sta(priv
, ctx
);
305 /* IBSS beacon needs to be sent after setting assoc */
306 if (ctx
->vif
&& (ctx
->vif
->type
== NL80211_IFTYPE_ADHOC
))
307 if (iwlagn_update_beacon(priv
, ctx
->vif
))
308 IWL_ERR(priv
, "Error sending IBSS beacon\n");
311 iwl_print_rx_config_cmd(priv
, ctx
);
313 iwl_init_sensitivity(priv
);
316 * If we issue a new RXON command which required a tune then we must
317 * send a new TXPOWER command or we won't be able to Tx any frames.
319 * It's expected we set power here if channel is changing.
321 ret
= iwl_set_tx_power(priv
, priv
->tx_power_next
, true);
323 IWL_ERR(priv
, "Error sending TX power (%d)\n", ret
);
330 int iwlagn_mac_config(struct ieee80211_hw
*hw
, u32 changed
)
332 struct iwl_priv
*priv
= hw
->priv
;
333 struct iwl_rxon_context
*ctx
;
334 struct ieee80211_conf
*conf
= &hw
->conf
;
335 struct ieee80211_channel
*channel
= conf
->channel
;
336 const struct iwl_channel_info
*ch_info
;
339 IWL_DEBUG_MAC80211(priv
, "changed %#x", changed
);
341 mutex_lock(&priv
->mutex
);
343 if (unlikely(test_bit(STATUS_SCANNING
, &priv
->status
))) {
344 IWL_DEBUG_MAC80211(priv
, "leave - scanning\n");
348 if (!iwl_is_ready(priv
)) {
349 IWL_DEBUG_MAC80211(priv
, "leave - not ready\n");
353 if (changed
& (IEEE80211_CONF_CHANGE_SMPS
|
354 IEEE80211_CONF_CHANGE_CHANNEL
)) {
355 /* mac80211 uses static for non-HT which is what we want */
356 priv
->current_ht_config
.smps
= conf
->smps_mode
;
359 * Recalculate chain counts.
361 * If monitor mode is enabled then mac80211 will
362 * set up the SM PS mode to OFF if an HT channel is
365 if (priv
->cfg
->ops
->hcmd
->set_rxon_chain
)
366 for_each_context(priv
, ctx
)
367 priv
->cfg
->ops
->hcmd
->set_rxon_chain(priv
, ctx
);
370 if (changed
& IEEE80211_CONF_CHANGE_CHANNEL
) {
373 ch_info
= iwl_get_channel_info(priv
, channel
->band
,
375 if (!is_channel_valid(ch_info
)) {
376 IWL_DEBUG_MAC80211(priv
, "leave - invalid channel\n");
381 spin_lock_irqsave(&priv
->lock
, flags
);
383 for_each_context(priv
, ctx
) {
384 /* Configure HT40 channels */
385 if (ctx
->ht
.enabled
!= conf_is_ht(conf
))
386 ctx
->ht
.enabled
= conf_is_ht(conf
);
388 if (ctx
->ht
.enabled
) {
389 if (conf_is_ht40_minus(conf
)) {
390 ctx
->ht
.extension_chan_offset
=
391 IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
392 ctx
->ht
.is_40mhz
= true;
393 } else if (conf_is_ht40_plus(conf
)) {
394 ctx
->ht
.extension_chan_offset
=
395 IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
396 ctx
->ht
.is_40mhz
= true;
398 ctx
->ht
.extension_chan_offset
=
399 IEEE80211_HT_PARAM_CHA_SEC_NONE
;
400 ctx
->ht
.is_40mhz
= false;
403 ctx
->ht
.is_40mhz
= false;
406 * Default to no protection. Protection mode will
407 * later be set from BSS config in iwl_ht_conf
409 ctx
->ht
.protection
= IEEE80211_HT_OP_MODE_PROTECTION_NONE
;
411 /* if we are switching from ht to 2.4 clear flags
412 * from any ht related info since 2.4 does not
414 if (le16_to_cpu(ctx
->staging
.channel
) !=
416 ctx
->staging
.flags
= 0;
418 iwl_set_rxon_channel(priv
, channel
, ctx
);
419 iwl_set_rxon_ht(priv
, &priv
->current_ht_config
);
421 iwl_set_flags_for_band(priv
, ctx
, channel
->band
,
425 spin_unlock_irqrestore(&priv
->lock
, flags
);
427 iwl_update_bcast_stations(priv
);
430 * The list of supported rates and rate mask can be different
431 * for each band; since the band may have changed, reset
432 * the rate mask to what mac80211 lists.
437 if (changed
& (IEEE80211_CONF_CHANGE_PS
|
438 IEEE80211_CONF_CHANGE_IDLE
)) {
439 ret
= iwl_power_update_mode(priv
, false);
441 IWL_DEBUG_MAC80211(priv
, "Error setting sleep level\n");
444 if (changed
& IEEE80211_CONF_CHANGE_POWER
) {
445 IWL_DEBUG_MAC80211(priv
, "TX Power old=%d new=%d\n",
446 priv
->tx_power_user_lmt
, conf
->power_level
);
448 iwl_set_tx_power(priv
, conf
->power_level
, false);
451 for_each_context(priv
, ctx
) {
452 if (!memcmp(&ctx
->staging
, &ctx
->active
, sizeof(ctx
->staging
)))
454 iwlagn_commit_rxon(priv
, ctx
);
457 mutex_unlock(&priv
->mutex
);
461 static void iwlagn_check_needed_chains(struct iwl_priv
*priv
,
462 struct iwl_rxon_context
*ctx
,
463 struct ieee80211_bss_conf
*bss_conf
)
465 struct ieee80211_vif
*vif
= ctx
->vif
;
466 struct iwl_rxon_context
*tmp
;
467 struct ieee80211_sta
*sta
;
468 struct iwl_ht_config
*ht_conf
= &priv
->current_ht_config
;
469 struct ieee80211_sta_ht_cap
*ht_cap
;
472 lockdep_assert_held(&priv
->mutex
);
475 case NL80211_IFTYPE_STATION
:
477 sta
= ieee80211_find_sta(vif
, bss_conf
->bssid
);
480 * If at all, this can only happen through a race
481 * when the AP disconnects us while we're still
482 * setting up the connection, in that case mac80211
483 * will soon tell us about that.
485 need_multiple
= false;
490 ht_cap
= &sta
->ht_cap
;
492 need_multiple
= true;
495 * If the peer advertises no support for receiving 2 and 3
496 * stream MCS rates, it can't be transmitting them either.
498 if (ht_cap
->mcs
.rx_mask
[1] == 0 &&
499 ht_cap
->mcs
.rx_mask
[2] == 0) {
500 need_multiple
= false;
501 } else if (!(ht_cap
->mcs
.tx_params
&
502 IEEE80211_HT_MCS_TX_DEFINED
)) {
503 /* If it can't TX MCS at all ... */
504 need_multiple
= false;
505 } else if (ht_cap
->mcs
.tx_params
&
506 IEEE80211_HT_MCS_TX_RX_DIFF
) {
510 * But if it can receive them, it might still not
511 * be able to transmit them, which is what we need
512 * to check here -- so check the number of streams
513 * it advertises for TX (if different from RX).
516 maxstreams
= (ht_cap
->mcs
.tx_params
&
517 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK
);
519 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT
;
523 need_multiple
= false;
528 case NL80211_IFTYPE_ADHOC
:
530 need_multiple
= false;
534 need_multiple
= true;
538 ctx
->ht_need_multiple_chains
= need_multiple
;
540 if (!need_multiple
) {
541 /* check all contexts */
542 for_each_context(priv
, tmp
) {
545 if (tmp
->ht_need_multiple_chains
) {
546 need_multiple
= true;
552 ht_conf
->single_chain_sufficient
= !need_multiple
;
555 void iwlagn_bss_info_changed(struct ieee80211_hw
*hw
,
556 struct ieee80211_vif
*vif
,
557 struct ieee80211_bss_conf
*bss_conf
,
560 struct iwl_priv
*priv
= hw
->priv
;
561 struct iwl_rxon_context
*ctx
= iwl_rxon_ctx_from_vif(vif
);
565 mutex_lock(&priv
->mutex
);
567 if (unlikely(!iwl_is_ready(priv
))) {
568 IWL_DEBUG_MAC80211(priv
, "leave - not ready\n");
569 mutex_unlock(&priv
->mutex
);
573 if (unlikely(!ctx
->vif
)) {
574 IWL_DEBUG_MAC80211(priv
, "leave - vif is NULL\n");
575 mutex_unlock(&priv
->mutex
);
579 if (changes
& BSS_CHANGED_BEACON_INT
)
582 if (changes
& BSS_CHANGED_QOS
) {
583 ctx
->qos_data
.qos_active
= bss_conf
->qos
;
584 iwlagn_update_qos(priv
, ctx
);
587 ctx
->staging
.assoc_id
= cpu_to_le16(vif
->bss_conf
.aid
);
588 if (vif
->bss_conf
.use_short_preamble
)
589 ctx
->staging
.flags
|= RXON_FLG_SHORT_PREAMBLE_MSK
;
591 ctx
->staging
.flags
&= ~RXON_FLG_SHORT_PREAMBLE_MSK
;
593 if (changes
& BSS_CHANGED_ASSOC
) {
594 if (bss_conf
->assoc
) {
595 priv
->timestamp
= bss_conf
->timestamp
;
596 ctx
->staging
.filter_flags
|= RXON_FILTER_ASSOC_MSK
;
598 ctx
->staging
.filter_flags
&= ~RXON_FILTER_ASSOC_MSK
;
602 if (ctx
->ht
.enabled
) {
603 ctx
->ht
.protection
= bss_conf
->ht_operation_mode
&
604 IEEE80211_HT_OP_MODE_PROTECTION
;
605 ctx
->ht
.non_gf_sta_present
= !!(bss_conf
->ht_operation_mode
&
606 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT
);
607 iwlagn_check_needed_chains(priv
, ctx
, bss_conf
);
608 iwl_set_rxon_ht(priv
, &priv
->current_ht_config
);
611 if (priv
->cfg
->ops
->hcmd
->set_rxon_chain
)
612 priv
->cfg
->ops
->hcmd
->set_rxon_chain(priv
, ctx
);
614 if (bss_conf
->use_cts_prot
&& (priv
->band
!= IEEE80211_BAND_5GHZ
))
615 ctx
->staging
.flags
|= RXON_FLG_TGG_PROTECT_MSK
;
617 ctx
->staging
.flags
&= ~RXON_FLG_TGG_PROTECT_MSK
;
619 if (bss_conf
->use_cts_prot
)
620 ctx
->staging
.flags
|= RXON_FLG_SELF_CTS_EN
;
622 ctx
->staging
.flags
&= ~RXON_FLG_SELF_CTS_EN
;
624 memcpy(ctx
->staging
.bssid_addr
, bss_conf
->bssid
, ETH_ALEN
);
626 if (vif
->type
== NL80211_IFTYPE_AP
||
627 vif
->type
== NL80211_IFTYPE_ADHOC
) {
628 if (vif
->bss_conf
.enable_beacon
) {
629 ctx
->staging
.filter_flags
|= RXON_FILTER_ASSOC_MSK
;
630 priv
->beacon_ctx
= ctx
;
632 ctx
->staging
.filter_flags
&= ~RXON_FILTER_ASSOC_MSK
;
633 priv
->beacon_ctx
= NULL
;
637 if (force
|| memcmp(&ctx
->staging
, &ctx
->active
, sizeof(ctx
->staging
)))
638 iwlagn_commit_rxon(priv
, ctx
);
640 if (changes
& BSS_CHANGED_ASSOC
&& bss_conf
->assoc
) {
642 * The chain noise calibration will enable PM upon
643 * completion. If calibration has already been run
644 * then we need to enable power management here.
646 if (priv
->chain_noise_data
.state
== IWL_CHAIN_NOISE_DONE
)
647 iwl_power_update_mode(priv
, false);
649 /* Enable RX differential gain and sensitivity calibrations */
650 iwl_chain_noise_reset(priv
);
651 priv
->start_calib
= 1;
654 if (changes
& BSS_CHANGED_IBSS
) {
655 ret
= iwlagn_manage_ibss_station(priv
, vif
,
656 bss_conf
->ibss_joined
);
658 IWL_ERR(priv
, "failed to %s IBSS station %pM\n",
659 bss_conf
->ibss_joined
? "add" : "remove",
663 if (changes
& BSS_CHANGED_BEACON
&& vif
->type
== NL80211_IFTYPE_ADHOC
&&
665 if (iwlagn_update_beacon(priv
, vif
))
666 IWL_ERR(priv
, "Error sending IBSS beacon\n");
669 mutex_unlock(&priv
->mutex
);
672 void iwlagn_post_scan(struct iwl_priv
*priv
)
674 struct iwl_rxon_context
*ctx
;
677 * Since setting the RXON may have been deferred while
678 * performing the scan, fire one off if needed
680 for_each_context(priv
, ctx
)
681 if (memcmp(&ctx
->staging
, &ctx
->active
, sizeof(ctx
->staging
)))
682 iwlagn_commit_rxon(priv
, ctx
);
684 if (priv
->cfg
->ops
->hcmd
->set_pan_params
)
685 priv
->cfg
->ops
->hcmd
->set_pan_params(priv
);