1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * The full GNU General Public License is included in this distribution
25 * in the file called COPYING.
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
34 * All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *****************************************************************************/
64 #include <linux/etherdevice.h>
65 #include <net/mac80211.h>
71 const u8 iwl_mvm_ac_to_tx_fifo
[] = {
78 struct iwl_mvm_mac_iface_iterator_data
{
80 struct ieee80211_vif
*vif
;
81 unsigned long available_mac_ids
[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER
)];
82 unsigned long available_tsf_ids
[BITS_TO_LONGS(NUM_TSF_IDS
)];
83 unsigned long used_hw_queues
[BITS_TO_LONGS(IWL_MVM_MAX_QUEUES
)];
84 enum iwl_tsf_id preferred_tsf
;
88 static void iwl_mvm_mac_iface_iterator(void *_data
, u8
*mac
,
89 struct ieee80211_vif
*vif
)
91 struct iwl_mvm_mac_iface_iterator_data
*data
= _data
;
92 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
95 /* Iterator may already find the interface being added -- skip it */
96 if (vif
== data
->vif
) {
97 data
->found_vif
= true;
101 /* Mark the queues used by the vif */
102 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
103 if (vif
->hw_queue
[ac
] != IEEE80211_INVAL_HW_QUEUE
)
104 __set_bit(vif
->hw_queue
[ac
], data
->used_hw_queues
);
106 if (vif
->cab_queue
!= IEEE80211_INVAL_HW_QUEUE
)
107 __set_bit(vif
->cab_queue
, data
->used_hw_queues
);
110 * Mark MAC IDs as used by clearing the available bit, and
111 * (below) mark TSFs as used if their existing use is not
112 * compatible with the new interface type.
113 * No locking or atomic bit operations are needed since the
114 * data is on the stack of the caller function.
116 __clear_bit(mvmvif
->id
, data
->available_mac_ids
);
119 * The TSF is a hardware/firmware resource, there are 4 and
120 * the driver should assign and free them as needed. However,
121 * there are cases where 2 MACs should share the same TSF ID
122 * for the purpose of clock sync, an optimization to avoid
123 * clock drift causing overlapping TBTTs/DTIMs for a GO and
124 * client in the system.
126 * The firmware will decide according to the MAC type which
127 * will be the master and slave. Clients that need to sync
128 * with a remote station will be the master, and an AP or GO
131 * Depending on the new interface type it can be slaved to
132 * or become the master of an existing interface.
134 switch (data
->vif
->type
) {
135 case NL80211_IFTYPE_STATION
:
137 * The new interface is client, so if the existing one
138 * we're iterating is an AP, the TSF should be used to
139 * avoid drift between the new client and existing AP,
140 * the existing AP will get drift updates from the new
141 * client context in this case
143 if (vif
->type
== NL80211_IFTYPE_AP
) {
144 if (data
->preferred_tsf
== NUM_TSF_IDS
&&
145 test_bit(mvmvif
->tsf_id
, data
->available_tsf_ids
))
146 data
->preferred_tsf
= mvmvif
->tsf_id
;
150 case NL80211_IFTYPE_AP
:
152 * The new interface is AP/GO, so should get drift
153 * updates from an existing client or use the same
154 * TSF as an existing GO. There's no drift between
155 * TSFs internally but if they used different TSFs
156 * then a new client MAC could update one of them
157 * and cause drift that way.
159 if (vif
->type
== NL80211_IFTYPE_STATION
||
160 vif
->type
== NL80211_IFTYPE_AP
) {
161 if (data
->preferred_tsf
== NUM_TSF_IDS
&&
162 test_bit(mvmvif
->tsf_id
, data
->available_tsf_ids
))
163 data
->preferred_tsf
= mvmvif
->tsf_id
;
169 * For all other interface types there's no need to
170 * take drift into account. Either they're exclusive
171 * like IBSS and monitor, or we don't care much about
172 * their TSF (like P2P Device), but we won't be able
173 * to share the TSF resource.
179 * Unless we exited above, we can't share the TSF resource
180 * that the virtual interface we're iterating over is using
181 * with the new one, so clear the available bit and if this
182 * was the preferred one, reset that as well.
184 __clear_bit(mvmvif
->tsf_id
, data
->available_tsf_ids
);
186 if (data
->preferred_tsf
== mvmvif
->tsf_id
)
187 data
->preferred_tsf
= NUM_TSF_IDS
;
191 * Get the mask of the queus used by the vif
193 u32
iwl_mvm_mac_get_queues_mask(struct iwl_mvm
*mvm
,
194 struct ieee80211_vif
*vif
)
198 if (vif
->type
== NL80211_IFTYPE_P2P_DEVICE
)
199 return BIT(IWL_MVM_OFFCHANNEL_QUEUE
);
201 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
202 if (vif
->hw_queue
[ac
] != IEEE80211_INVAL_HW_QUEUE
)
203 qmask
|= BIT(vif
->hw_queue
[ac
]);
208 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm
*mvm
,
209 struct ieee80211_vif
*vif
)
211 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
212 struct iwl_mvm_mac_iface_iterator_data data
= {
215 .available_mac_ids
= { (1 << NUM_MAC_INDEX_DRIVER
) - 1 },
216 .available_tsf_ids
= { (1 << NUM_TSF_IDS
) - 1 },
217 /* no preference yet */
218 .preferred_tsf
= NUM_TSF_IDS
,
220 BIT(IWL_MVM_OFFCHANNEL_QUEUE
) |
221 BIT(mvm
->aux_queue
) |
222 BIT(IWL_MVM_CMD_QUEUE
)
230 * Allocate a MAC ID and a TSF for this MAC, along with the queues
231 * and other resources.
235 * Before the iterator, we start with all MAC IDs and TSFs available.
237 * During iteration, all MAC IDs are cleared that are in use by other
238 * virtual interfaces, and all TSF IDs are cleared that can't be used
239 * by this new virtual interface because they're used by an interface
240 * that can't share it with the new one.
241 * At the same time, we check if there's a preferred TSF in the case
242 * that we should share it with another interface.
245 /* Currently, MAC ID 0 should be used only for the managed vif */
246 if (vif
->type
!= NL80211_IFTYPE_STATION
|| vif
->p2p
)
247 __clear_bit(0, data
.available_mac_ids
);
249 ieee80211_iterate_active_interfaces_atomic(
250 mvm
->hw
, IEEE80211_IFACE_ITER_RESUME_ALL
,
251 iwl_mvm_mac_iface_iterator
, &data
);
254 * In the case we're getting here during resume, it's similar to
255 * firmware restart, and with RESUME_ALL the iterator will find
256 * the vif being added already.
257 * We don't want to reassign any IDs in either case since doing
258 * so would probably assign different IDs (as interfaces aren't
259 * necessarily added in the same order), but the old IDs were
260 * preserved anyway, so skip ID assignment for both resume and
266 /* Therefore, in recovery, we can't get here */
267 if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART
, &mvm
->status
)))
270 mvmvif
->id
= find_first_bit(data
.available_mac_ids
,
271 NUM_MAC_INDEX_DRIVER
);
272 if (mvmvif
->id
== NUM_MAC_INDEX_DRIVER
) {
273 IWL_ERR(mvm
, "Failed to init MAC context - no free ID!\n");
278 if (data
.preferred_tsf
!= NUM_TSF_IDS
)
279 mvmvif
->tsf_id
= data
.preferred_tsf
;
281 mvmvif
->tsf_id
= find_first_bit(data
.available_tsf_ids
,
283 if (mvmvif
->tsf_id
== NUM_TSF_IDS
) {
284 IWL_ERR(mvm
, "Failed to init MAC context - no free TSF!\n");
291 INIT_LIST_HEAD(&mvmvif
->time_event_data
.list
);
292 mvmvif
->time_event_data
.id
= TE_MAX
;
294 /* No need to allocate data queues to P2P Device MAC.*/
295 if (vif
->type
== NL80211_IFTYPE_P2P_DEVICE
) {
296 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
297 vif
->hw_queue
[ac
] = IEEE80211_INVAL_HW_QUEUE
;
302 /* Find available queues, and allocate them to the ACs */
303 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
304 u8 queue
= find_first_zero_bit(data
.used_hw_queues
,
305 mvm
->first_agg_queue
);
307 if (queue
>= mvm
->first_agg_queue
) {
308 IWL_ERR(mvm
, "Failed to allocate queue\n");
313 __set_bit(queue
, data
.used_hw_queues
);
314 vif
->hw_queue
[ac
] = queue
;
317 /* Allocate the CAB queue for softAP and GO interfaces */
318 if (vif
->type
== NL80211_IFTYPE_AP
) {
319 u8 queue
= find_first_zero_bit(data
.used_hw_queues
,
320 mvm
->first_agg_queue
);
322 if (queue
>= mvm
->first_agg_queue
) {
323 IWL_ERR(mvm
, "Failed to allocate cab queue\n");
328 vif
->cab_queue
= queue
;
330 vif
->cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
333 mvmvif
->bcast_sta
.sta_id
= IWL_MVM_STATION_COUNT
;
334 mvmvif
->ap_sta_id
= IWL_MVM_STATION_COUNT
;
336 for (i
= 0; i
< NUM_IWL_MVM_SMPS_REQ
; i
++)
337 mvmvif
->smps_requests
[i
] = IEEE80211_SMPS_AUTOMATIC
;
342 memset(mvmvif
, 0, sizeof(struct iwl_mvm_vif
));
343 memset(vif
->hw_queue
, IEEE80211_INVAL_HW_QUEUE
, sizeof(vif
->hw_queue
));
344 vif
->cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
348 int iwl_mvm_mac_ctxt_init(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
)
353 lockdep_assert_held(&mvm
->mutex
);
355 ret
= iwl_mvm_mac_ctxt_allocate_resources(mvm
, vif
);
360 case NL80211_IFTYPE_P2P_DEVICE
:
361 iwl_trans_ac_txq_enable(mvm
->trans
, IWL_MVM_OFFCHANNEL_QUEUE
,
364 case NL80211_IFTYPE_AP
:
365 iwl_trans_ac_txq_enable(mvm
->trans
, vif
->cab_queue
,
366 IWL_MVM_TX_FIFO_MCAST
);
369 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
370 iwl_trans_ac_txq_enable(mvm
->trans
, vif
->hw_queue
[ac
],
371 iwl_mvm_ac_to_tx_fifo
[ac
]);
378 void iwl_mvm_mac_ctxt_release(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
)
382 lockdep_assert_held(&mvm
->mutex
);
385 case NL80211_IFTYPE_P2P_DEVICE
:
386 iwl_trans_txq_disable(mvm
->trans
, IWL_MVM_OFFCHANNEL_QUEUE
);
388 case NL80211_IFTYPE_AP
:
389 iwl_trans_txq_disable(mvm
->trans
, vif
->cab_queue
);
392 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
393 iwl_trans_txq_disable(mvm
->trans
, vif
->hw_queue
[ac
]);
397 static void iwl_mvm_ack_rates(struct iwl_mvm
*mvm
,
398 struct ieee80211_vif
*vif
,
399 enum ieee80211_band band
,
400 u8
*cck_rates
, u8
*ofdm_rates
)
402 struct ieee80211_supported_band
*sband
;
403 unsigned long basic
= vif
->bss_conf
.basic_rates
;
404 int lowest_present_ofdm
= 100;
405 int lowest_present_cck
= 100;
410 sband
= mvm
->hw
->wiphy
->bands
[band
];
412 for_each_set_bit(i
, &basic
, BITS_PER_LONG
) {
413 int hw
= sband
->bitrates
[i
].hw_value
;
414 if (hw
>= IWL_FIRST_OFDM_RATE
) {
415 ofdm
|= BIT(hw
- IWL_FIRST_OFDM_RATE
);
416 if (lowest_present_ofdm
> hw
)
417 lowest_present_ofdm
= hw
;
419 BUILD_BUG_ON(IWL_FIRST_CCK_RATE
!= 0);
422 if (lowest_present_cck
> hw
)
423 lowest_present_cck
= hw
;
428 * Now we've got the basic rates as bitmaps in the ofdm and cck
429 * variables. This isn't sufficient though, as there might not
430 * be all the right rates in the bitmap. E.g. if the only basic
431 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
432 * and 6 Mbps because the 802.11-2007 standard says in 9.6:
434 * [...] a STA responding to a received frame shall transmit
435 * its Control Response frame [...] at the highest rate in the
436 * BSSBasicRateSet parameter that is less than or equal to the
437 * rate of the immediately previous frame in the frame exchange
438 * sequence ([...]) and that is of the same modulation class
439 * ([...]) as the received frame. If no rate contained in the
440 * BSSBasicRateSet parameter meets these conditions, then the
441 * control frame sent in response to a received frame shall be
442 * transmitted at the highest mandatory rate of the PHY that is
443 * less than or equal to the rate of the received frame, and
444 * that is of the same modulation class as the received frame.
446 * As a consequence, we need to add all mandatory rates that are
447 * lower than all of the basic rates to these bitmaps.
450 if (IWL_RATE_24M_INDEX
< lowest_present_ofdm
)
451 ofdm
|= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE
;
452 if (IWL_RATE_12M_INDEX
< lowest_present_ofdm
)
453 ofdm
|= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE
;
454 /* 6M already there or needed so always add */
455 ofdm
|= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE
;
458 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
460 * - if no CCK rates are basic, it must be ERP since there must
461 * be some basic rates at all, so they're OFDM => ERP PHY
462 * (or we're in 5 GHz, and the cck bitmap will never be used)
463 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M
464 * - if 5.5M is basic, 1M and 2M are mandatory
465 * - if 2M is basic, 1M is mandatory
466 * - if 1M is basic, that's the only valid ACK rate.
467 * As a consequence, it's not as complicated as it sounds, just add
468 * any lower rates to the ACK rate bitmap.
470 if (IWL_RATE_11M_INDEX
< lowest_present_cck
)
471 cck
|= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE
;
472 if (IWL_RATE_5M_INDEX
< lowest_present_cck
)
473 cck
|= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE
;
474 if (IWL_RATE_2M_INDEX
< lowest_present_cck
)
475 cck
|= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE
;
476 /* 1M already there or needed so always add */
477 cck
|= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE
;
483 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm
*mvm
,
484 struct ieee80211_vif
*vif
,
485 struct iwl_mac_ctx_cmd
*cmd
,
488 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
489 struct ieee80211_chanctx_conf
*chanctx
;
490 u8 cck_ack_rates
, ofdm_ack_rates
;
493 cmd
->id_and_color
= cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
,
495 cmd
->action
= cpu_to_le32(action
);
498 case NL80211_IFTYPE_STATION
:
500 cmd
->mac_type
= cpu_to_le32(FW_MAC_TYPE_P2P_STA
);
502 cmd
->mac_type
= cpu_to_le32(FW_MAC_TYPE_BSS_STA
);
504 case NL80211_IFTYPE_AP
:
505 cmd
->mac_type
= cpu_to_le32(FW_MAC_TYPE_GO
);
507 case NL80211_IFTYPE_MONITOR
:
508 cmd
->mac_type
= cpu_to_le32(FW_MAC_TYPE_LISTENER
);
510 case NL80211_IFTYPE_P2P_DEVICE
:
511 cmd
->mac_type
= cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE
);
513 case NL80211_IFTYPE_ADHOC
:
514 cmd
->mac_type
= cpu_to_le32(FW_MAC_TYPE_IBSS
);
520 cmd
->tsf_id
= cpu_to_le32(mvmvif
->tsf_id
);
522 memcpy(cmd
->node_addr
, vif
->addr
, ETH_ALEN
);
523 if (vif
->bss_conf
.bssid
)
524 memcpy(cmd
->bssid_addr
, vif
->bss_conf
.bssid
, ETH_ALEN
);
526 eth_broadcast_addr(cmd
->bssid_addr
);
529 chanctx
= rcu_dereference(vif
->chanctx_conf
);
530 iwl_mvm_ack_rates(mvm
, vif
, chanctx
? chanctx
->def
.chan
->band
531 : IEEE80211_BAND_2GHZ
,
532 &cck_ack_rates
, &ofdm_ack_rates
);
535 cmd
->cck_rates
= cpu_to_le32((u32
)cck_ack_rates
);
536 cmd
->ofdm_rates
= cpu_to_le32((u32
)ofdm_ack_rates
);
538 cmd
->cck_short_preamble
=
539 cpu_to_le32(vif
->bss_conf
.use_short_preamble
?
540 MAC_FLG_SHORT_PREAMBLE
: 0);
542 cpu_to_le32(vif
->bss_conf
.use_short_slot
?
543 MAC_FLG_SHORT_SLOT
: 0);
545 for (i
= 0; i
< AC_NUM
; i
++) {
546 cmd
->ac
[i
].cw_min
= cpu_to_le16(mvmvif
->queue_params
[i
].cw_min
);
547 cmd
->ac
[i
].cw_max
= cpu_to_le16(mvmvif
->queue_params
[i
].cw_max
);
548 cmd
->ac
[i
].aifsn
= mvmvif
->queue_params
[i
].aifs
;
549 cmd
->ac
[i
].edca_txop
=
550 cpu_to_le16(mvmvif
->queue_params
[i
].txop
* 32);
551 cmd
->ac
[i
].fifos_mask
= BIT(iwl_mvm_ac_to_tx_fifo
[i
]);
554 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
555 if (vif
->type
== NL80211_IFTYPE_AP
)
556 cmd
->ac
[AC_VO
].fifos_mask
|= BIT(IWL_MVM_TX_FIFO_MCAST
);
558 if (vif
->bss_conf
.qos
)
559 cmd
->qos_flags
|= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA
);
561 /* Don't use cts to self as the fw doesn't support it currently. */
562 if (vif
->bss_conf
.use_cts_prot
) {
563 cmd
->protection_flags
|= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT
);
564 if (IWL_UCODE_API(mvm
->fw
->ucode_ver
) >= 8)
565 cmd
->protection_flags
|=
566 cpu_to_le32(MAC_PROT_FLG_SELF_CTS_EN
);
570 * I think that we should enable these 2 flags regardless the HT PROT
571 * fields in the HT IE, but I am not sure. Someone knows whom to ask?...
573 if (vif
->bss_conf
.chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
574 cmd
->qos_flags
|= cpu_to_le32(MAC_QOS_FLG_TGN
);
575 cmd
->protection_flags
|= cpu_to_le32(MAC_PROT_FLG_HT_PROT
|
576 MAC_PROT_FLG_FAT_PROT
);
579 cmd
->filter_flags
= cpu_to_le32(MAC_FILTER_ACCEPT_GRP
);
582 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm
*mvm
,
583 struct iwl_mac_ctx_cmd
*cmd
)
585 int ret
= iwl_mvm_send_cmd_pdu(mvm
, MAC_CONTEXT_CMD
, CMD_SYNC
,
588 IWL_ERR(mvm
, "Failed to send MAC context (action:%d): %d\n",
589 le32_to_cpu(cmd
->action
), ret
);
594 * Fill the specific data for mac context of type station or p2p client
596 static void iwl_mvm_mac_ctxt_cmd_fill_sta(struct iwl_mvm
*mvm
,
597 struct ieee80211_vif
*vif
,
598 struct iwl_mac_data_sta
*ctxt_sta
,
599 bool force_assoc_off
)
601 /* We need the dtim_period to set the MAC as associated */
602 if (vif
->bss_conf
.assoc
&& vif
->bss_conf
.dtim_period
&&
607 * The DTIM count counts down, so when it is N that means N
608 * more beacon intervals happen until the DTIM TBTT. Therefore
609 * add this to the current time. If that ends up being in the
610 * future, the firmware will handle it.
612 * Also note that the system_timestamp (which we get here as
613 * "sync_device_ts") and TSF timestamp aren't at exactly the
614 * same offset in the frame -- the TSF is at the first symbol
615 * of the TSF, the system timestamp is at signal acquisition
616 * time. This means there's an offset between them of at most
617 * a few hundred microseconds (24 * 8 bits + PLCP time gives
618 * 384us in the longest case), this is currently not relevant
619 * as the firmware wakes up around 2ms before the TBTT.
621 dtim_offs
= vif
->bss_conf
.sync_dtim_count
*
622 vif
->bss_conf
.beacon_int
;
623 /* convert TU to usecs */
627 cpu_to_le64(vif
->bss_conf
.sync_tsf
+ dtim_offs
);
628 ctxt_sta
->dtim_time
=
629 cpu_to_le32(vif
->bss_conf
.sync_device_ts
+ dtim_offs
);
631 IWL_DEBUG_INFO(mvm
, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
632 le64_to_cpu(ctxt_sta
->dtim_tsf
),
633 le32_to_cpu(ctxt_sta
->dtim_time
),
636 ctxt_sta
->is_assoc
= cpu_to_le32(1);
638 ctxt_sta
->is_assoc
= cpu_to_le32(0);
641 ctxt_sta
->bi
= cpu_to_le32(vif
->bss_conf
.beacon_int
);
642 ctxt_sta
->bi_reciprocal
=
643 cpu_to_le32(iwl_mvm_reciprocal(vif
->bss_conf
.beacon_int
));
644 ctxt_sta
->dtim_interval
= cpu_to_le32(vif
->bss_conf
.beacon_int
*
645 vif
->bss_conf
.dtim_period
);
646 ctxt_sta
->dtim_reciprocal
=
647 cpu_to_le32(iwl_mvm_reciprocal(vif
->bss_conf
.beacon_int
*
648 vif
->bss_conf
.dtim_period
));
650 ctxt_sta
->listen_interval
= cpu_to_le32(mvm
->hw
->conf
.listen_interval
);
651 ctxt_sta
->assoc_id
= cpu_to_le32(vif
->bss_conf
.aid
);
654 static int iwl_mvm_mac_ctxt_cmd_station(struct iwl_mvm
*mvm
,
655 struct ieee80211_vif
*vif
,
658 struct iwl_mac_ctx_cmd cmd
= {};
660 WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
|| vif
->p2p
);
662 /* Fill the common data for all mac context types */
663 iwl_mvm_mac_ctxt_cmd_common(mvm
, vif
, &cmd
, action
);
665 /* Allow beacons to pass through as long as we are not associated,or we
666 * do not have dtim period information */
667 if (!vif
->bss_conf
.assoc
|| !vif
->bss_conf
.dtim_period
)
668 cmd
.filter_flags
|= cpu_to_le32(MAC_FILTER_IN_BEACON
);
670 cmd
.filter_flags
&= ~cpu_to_le32(MAC_FILTER_IN_BEACON
);
672 /* Fill the data specific for station mode */
673 iwl_mvm_mac_ctxt_cmd_fill_sta(mvm
, vif
, &cmd
.sta
,
674 action
== FW_CTXT_ACTION_ADD
);
676 return iwl_mvm_mac_ctxt_send_cmd(mvm
, &cmd
);
679 static int iwl_mvm_mac_ctxt_cmd_p2p_client(struct iwl_mvm
*mvm
,
680 struct ieee80211_vif
*vif
,
683 struct iwl_mac_ctx_cmd cmd
= {};
684 struct ieee80211_p2p_noa_attr
*noa
= &vif
->bss_conf
.p2p_noa_attr
;
686 WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
|| !vif
->p2p
);
688 /* Fill the common data for all mac context types */
689 iwl_mvm_mac_ctxt_cmd_common(mvm
, vif
, &cmd
, action
);
691 /* Fill the data specific for station mode */
692 iwl_mvm_mac_ctxt_cmd_fill_sta(mvm
, vif
, &cmd
.p2p_sta
.sta
,
693 action
== FW_CTXT_ACTION_ADD
);
695 cmd
.p2p_sta
.ctwin
= cpu_to_le32(noa
->oppps_ctwindow
&
696 IEEE80211_P2P_OPPPS_CTWINDOW_MASK
);
698 return iwl_mvm_mac_ctxt_send_cmd(mvm
, &cmd
);
701 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm
*mvm
,
702 struct ieee80211_vif
*vif
,
705 struct iwl_mac_ctx_cmd cmd
= {};
707 WARN_ON(vif
->type
!= NL80211_IFTYPE_MONITOR
);
709 iwl_mvm_mac_ctxt_cmd_common(mvm
, vif
, &cmd
, action
);
711 cmd
.filter_flags
= cpu_to_le32(MAC_FILTER_IN_PROMISC
|
712 MAC_FILTER_IN_CONTROL_AND_MGMT
|
713 MAC_FILTER_IN_BEACON
|
714 MAC_FILTER_IN_PROBE_REQUEST
);
716 return iwl_mvm_mac_ctxt_send_cmd(mvm
, &cmd
);
719 struct iwl_mvm_go_iterator_data
{
723 static void iwl_mvm_go_iterator(void *_data
, u8
*mac
, struct ieee80211_vif
*vif
)
725 struct iwl_mvm_go_iterator_data
*data
= _data
;
726 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
728 if (vif
->type
== NL80211_IFTYPE_AP
&& vif
->p2p
&& mvmvif
->ap_active
)
729 data
->go_active
= true;
732 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm
*mvm
,
733 struct ieee80211_vif
*vif
,
736 struct iwl_mac_ctx_cmd cmd
= {};
737 struct iwl_mvm_go_iterator_data data
= {};
739 WARN_ON(vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
);
741 iwl_mvm_mac_ctxt_cmd_common(mvm
, vif
, &cmd
, action
);
743 cmd
.protection_flags
|= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT
);
745 /* Override the filter flags to accept only probe requests */
746 cmd
.filter_flags
= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST
);
749 * This flag should be set to true when the P2P Device is
750 * discoverable and there is at least another active P2P GO. Settings
751 * this flag will allow the P2P Device to be discoverable on other
752 * channels in addition to its listen channel.
753 * Note that this flag should not be set in other cases as it opens the
754 * Rx filters on all MAC and increases the number of interrupts.
756 ieee80211_iterate_active_interfaces_atomic(
757 mvm
->hw
, IEEE80211_IFACE_ITER_RESUME_ALL
,
758 iwl_mvm_go_iterator
, &data
);
760 cmd
.p2p_dev
.is_disc_extended
= cpu_to_le32(data
.go_active
? 1 : 0);
761 return iwl_mvm_mac_ctxt_send_cmd(mvm
, &cmd
);
764 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm
*mvm
,
765 struct iwl_mac_beacon_cmd
*beacon_cmd
,
766 u8
*beacon
, u32 frame_size
)
769 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*)beacon
;
771 /* The index is relative to frame start but we start looking at the
772 * variable-length part of the beacon. */
773 tim_idx
= mgmt
->u
.beacon
.variable
- beacon
;
775 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
776 while ((tim_idx
< (frame_size
- 2)) &&
777 (beacon
[tim_idx
] != WLAN_EID_TIM
))
778 tim_idx
+= beacon
[tim_idx
+1] + 2;
780 /* If TIM field was found, set variables */
781 if ((tim_idx
< (frame_size
- 1)) && (beacon
[tim_idx
] == WLAN_EID_TIM
)) {
782 beacon_cmd
->tim_idx
= cpu_to_le32(tim_idx
);
783 beacon_cmd
->tim_size
= cpu_to_le32((u32
)beacon
[tim_idx
+1]);
785 IWL_WARN(mvm
, "Unable to find TIM Element in beacon\n");
789 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm
*mvm
,
790 struct ieee80211_vif
*vif
,
791 struct sk_buff
*beacon
)
793 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
794 struct iwl_host_cmd cmd
= {
795 .id
= BEACON_TEMPLATE_CMD
,
798 struct iwl_mac_beacon_cmd beacon_cmd
= {};
799 struct ieee80211_tx_info
*info
;
803 if (WARN_ON(!beacon
))
806 beacon_skb_len
= beacon
->len
;
808 /* TODO: for now the beacon template id is set to be the mac context id.
809 * Might be better to handle it as another resource ... */
810 beacon_cmd
.template_id
= cpu_to_le32((u32
)mvmvif
->id
);
812 /* Set up TX command fields */
813 beacon_cmd
.tx
.len
= cpu_to_le16((u16
)beacon_skb_len
);
814 beacon_cmd
.tx
.sta_id
= mvmvif
->bcast_sta
.sta_id
;
815 beacon_cmd
.tx
.life_time
= cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE
);
816 beacon_cmd
.tx
.tx_flags
= cpu_to_le32(TX_CMD_FLG_SEQ_CTL
|
820 mvm
->mgmt_last_antenna_idx
=
821 iwl_mvm_next_antenna(mvm
, iwl_fw_valid_tx_ant(mvm
->fw
),
822 mvm
->mgmt_last_antenna_idx
);
824 beacon_cmd
.tx
.rate_n_flags
=
825 cpu_to_le32(BIT(mvm
->mgmt_last_antenna_idx
) <<
828 info
= IEEE80211_SKB_CB(beacon
);
830 if (info
->band
== IEEE80211_BAND_5GHZ
|| vif
->p2p
) {
831 rate
= IWL_FIRST_OFDM_RATE
;
833 rate
= IWL_FIRST_CCK_RATE
;
834 beacon_cmd
.tx
.rate_n_flags
|= cpu_to_le32(RATE_MCS_CCK_MSK
);
836 beacon_cmd
.tx
.rate_n_flags
|=
837 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate
));
839 /* Set up TX beacon command fields */
840 iwl_mvm_mac_ctxt_set_tim(mvm
, &beacon_cmd
,
845 cmd
.len
[0] = sizeof(beacon_cmd
);
846 cmd
.data
[0] = &beacon_cmd
;
847 cmd
.dataflags
[0] = 0;
848 cmd
.len
[1] = beacon_skb_len
;
849 cmd
.data
[1] = beacon
->data
;
850 cmd
.dataflags
[1] = IWL_HCMD_DFL_DUP
;
852 return iwl_mvm_send_cmd(mvm
, &cmd
);
855 /* The beacon template for the AP/GO context has changed and needs update */
856 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm
*mvm
,
857 struct ieee80211_vif
*vif
)
859 struct sk_buff
*beacon
;
862 WARN_ON(vif
->type
!= NL80211_IFTYPE_AP
);
864 beacon
= ieee80211_beacon_get(mvm
->hw
, vif
);
868 ret
= iwl_mvm_mac_ctxt_send_beacon(mvm
, vif
, beacon
);
869 dev_kfree_skb(beacon
);
873 struct iwl_mvm_mac_ap_iterator_data
{
875 struct ieee80211_vif
*vif
;
876 u32 beacon_device_ts
;
880 /* Find the beacon_device_ts and beacon_int for a managed interface */
881 static void iwl_mvm_mac_ap_iterator(void *_data
, u8
*mac
,
882 struct ieee80211_vif
*vif
)
884 struct iwl_mvm_mac_ap_iterator_data
*data
= _data
;
886 if (vif
->type
!= NL80211_IFTYPE_STATION
|| !vif
->bss_conf
.assoc
)
889 /* Station client has higher priority over P2P client*/
890 if (vif
->p2p
&& data
->beacon_device_ts
)
893 data
->beacon_device_ts
= vif
->bss_conf
.sync_device_ts
;
894 data
->beacon_int
= vif
->bss_conf
.beacon_int
;
898 * Fill the specific data for mac context of type AP of P2P GO
900 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm
*mvm
,
901 struct ieee80211_vif
*vif
,
902 struct iwl_mac_data_ap
*ctxt_ap
,
905 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
906 struct iwl_mvm_mac_ap_iterator_data data
= {
909 .beacon_device_ts
= 0
912 ctxt_ap
->bi
= cpu_to_le32(vif
->bss_conf
.beacon_int
);
913 ctxt_ap
->bi_reciprocal
=
914 cpu_to_le32(iwl_mvm_reciprocal(vif
->bss_conf
.beacon_int
));
915 ctxt_ap
->dtim_interval
= cpu_to_le32(vif
->bss_conf
.beacon_int
*
916 vif
->bss_conf
.dtim_period
);
917 ctxt_ap
->dtim_reciprocal
=
918 cpu_to_le32(iwl_mvm_reciprocal(vif
->bss_conf
.beacon_int
*
919 vif
->bss_conf
.dtim_period
));
921 ctxt_ap
->mcast_qid
= cpu_to_le32(vif
->cab_queue
);
924 * Only set the beacon time when the MAC is being added, when we
925 * just modify the MAC then we should keep the time -- the firmware
926 * can otherwise have a "jumping" TBTT.
930 * If there is a station/P2P client interface which is
931 * associated, set the AP's TBTT far enough from the station's
932 * TBTT. Otherwise, set it to the current system time
934 ieee80211_iterate_active_interfaces_atomic(
935 mvm
->hw
, IEEE80211_IFACE_ITER_RESUME_ALL
,
936 iwl_mvm_mac_ap_iterator
, &data
);
938 if (data
.beacon_device_ts
) {
939 u32 rand
= (prandom_u32() % (80 - 20)) + 20;
940 mvmvif
->ap_beacon_time
= data
.beacon_device_ts
+
941 ieee80211_tu_to_usec(data
.beacon_int
* rand
/
944 mvmvif
->ap_beacon_time
=
945 iwl_read_prph(mvm
->trans
,
946 DEVICE_SYSTEM_TIME_REG
);
950 ctxt_ap
->beacon_time
= cpu_to_le32(mvmvif
->ap_beacon_time
);
951 ctxt_ap
->beacon_tsf
= 0; /* unused */
953 /* TODO: Assume that the beacon id == mac context id */
954 ctxt_ap
->beacon_template
= cpu_to_le32(mvmvif
->id
);
957 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm
*mvm
,
958 struct ieee80211_vif
*vif
,
961 struct iwl_mac_ctx_cmd cmd
= {};
963 WARN_ON(vif
->type
!= NL80211_IFTYPE_AP
|| vif
->p2p
);
965 /* Fill the common data for all mac context types */
966 iwl_mvm_mac_ctxt_cmd_common(mvm
, vif
, &cmd
, action
);
968 /* Also enable probe requests to pass */
969 cmd
.filter_flags
|= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST
);
971 /* Fill the data specific for ap mode */
972 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm
, vif
, &cmd
.ap
,
973 action
== FW_CTXT_ACTION_ADD
);
975 return iwl_mvm_mac_ctxt_send_cmd(mvm
, &cmd
);
978 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm
*mvm
,
979 struct ieee80211_vif
*vif
,
982 struct iwl_mac_ctx_cmd cmd
= {};
983 struct ieee80211_p2p_noa_attr
*noa
= &vif
->bss_conf
.p2p_noa_attr
;
985 WARN_ON(vif
->type
!= NL80211_IFTYPE_AP
|| !vif
->p2p
);
987 /* Fill the common data for all mac context types */
988 iwl_mvm_mac_ctxt_cmd_common(mvm
, vif
, &cmd
, action
);
990 /* Fill the data specific for GO mode */
991 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm
, vif
, &cmd
.go
.ap
,
992 action
== FW_CTXT_ACTION_ADD
);
994 cmd
.go
.ctwin
= cpu_to_le32(noa
->oppps_ctwindow
&
995 IEEE80211_P2P_OPPPS_CTWINDOW_MASK
);
996 cmd
.go
.opp_ps_enabled
=
997 cpu_to_le32(!!(noa
->oppps_ctwindow
&
998 IEEE80211_P2P_OPPPS_ENABLE_BIT
));
1000 return iwl_mvm_mac_ctxt_send_cmd(mvm
, &cmd
);
1003 static int iwl_mvm_mac_ctx_send(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
1006 switch (vif
->type
) {
1007 case NL80211_IFTYPE_STATION
:
1009 return iwl_mvm_mac_ctxt_cmd_station(mvm
, vif
,
1012 return iwl_mvm_mac_ctxt_cmd_p2p_client(mvm
, vif
,
1015 case NL80211_IFTYPE_AP
:
1017 return iwl_mvm_mac_ctxt_cmd_ap(mvm
, vif
, action
);
1019 return iwl_mvm_mac_ctxt_cmd_go(mvm
, vif
, action
);
1021 case NL80211_IFTYPE_MONITOR
:
1022 return iwl_mvm_mac_ctxt_cmd_listener(mvm
, vif
, action
);
1023 case NL80211_IFTYPE_P2P_DEVICE
:
1024 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm
, vif
, action
);
1032 int iwl_mvm_mac_ctxt_add(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
)
1034 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
1037 if (WARN_ONCE(mvmvif
->uploaded
, "Adding active MAC %pM/%d\n",
1038 vif
->addr
, ieee80211_vif_type_p2p(vif
)))
1041 ret
= iwl_mvm_mac_ctx_send(mvm
, vif
, FW_CTXT_ACTION_ADD
);
1045 /* will only do anything at resume from D3 time */
1046 iwl_mvm_set_last_nonqos_seq(mvm
, vif
);
1048 mvmvif
->uploaded
= true;
1052 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
)
1054 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
1056 if (WARN_ONCE(!mvmvif
->uploaded
, "Changing inactive MAC %pM/%d\n",
1057 vif
->addr
, ieee80211_vif_type_p2p(vif
)))
1060 return iwl_mvm_mac_ctx_send(mvm
, vif
, FW_CTXT_ACTION_MODIFY
);
1063 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
)
1065 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
1066 struct iwl_mac_ctx_cmd cmd
;
1069 if (WARN_ONCE(!mvmvif
->uploaded
, "Removing inactive MAC %pM/%d\n",
1070 vif
->addr
, ieee80211_vif_type_p2p(vif
)))
1073 memset(&cmd
, 0, sizeof(cmd
));
1075 cmd
.id_and_color
= cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
,
1077 cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_REMOVE
);
1079 ret
= iwl_mvm_send_cmd_pdu(mvm
, MAC_CONTEXT_CMD
, CMD_SYNC
,
1082 IWL_ERR(mvm
, "Failed to remove MAC context: %d\n", ret
);
1086 mvmvif
->uploaded
= false;
1090 int iwl_mvm_rx_beacon_notif(struct iwl_mvm
*mvm
,
1091 struct iwl_rx_cmd_buffer
*rxb
,
1092 struct iwl_device_cmd
*cmd
)
1094 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1095 struct iwl_beacon_notif
*beacon
= (void *)pkt
->data
;
1096 u16 status __maybe_unused
=
1097 le16_to_cpu(beacon
->beacon_notify_hdr
.status
.status
);
1098 u32 rate __maybe_unused
=
1099 le32_to_cpu(beacon
->beacon_notify_hdr
.initial_rate
);
1101 IWL_DEBUG_RX(mvm
, "beacon status %#x retries:%d tsf:0x%16llX rate:%d\n",
1102 status
& TX_STATUS_MSK
,
1103 beacon
->beacon_notify_hdr
.failure_frame
,
1104 le64_to_cpu(beacon
->tsf
),
1109 static void iwl_mvm_beacon_loss_iterator(void *_data
, u8
*mac
,
1110 struct ieee80211_vif
*vif
)
1113 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
1115 if (mvmvif
->id
== *id
)
1116 ieee80211_beacon_loss(vif
);
1119 int iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm
*mvm
,
1120 struct iwl_rx_cmd_buffer
*rxb
,
1121 struct iwl_device_cmd
*cmd
)
1123 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1124 struct iwl_missed_beacons_notif
*missed_beacons
= (void *)pkt
->data
;
1125 u16 id
= (u16
)le32_to_cpu(missed_beacons
->mac_id
);
1127 ieee80211_iterate_active_interfaces_atomic(mvm
->hw
,
1128 IEEE80211_IFACE_ITER_NORMAL
,
1129 iwl_mvm_beacon_loss_iterator
,