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_FIRST_AGG_QUEUE
)];
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 qmask
= (vif
->cab_queue
!= IEEE80211_INVAL_HW_QUEUE
) ?
202 BIT(vif
->cab_queue
) : 0;
204 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
205 if (vif
->hw_queue
[ac
] != IEEE80211_INVAL_HW_QUEUE
)
206 qmask
|= BIT(vif
->hw_queue
[ac
]);
211 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm
*mvm
,
212 struct ieee80211_vif
*vif
)
214 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
215 struct iwl_mvm_mac_iface_iterator_data data
= {
218 .available_mac_ids
= { (1 << NUM_MAC_INDEX_DRIVER
) - 1 },
219 .available_tsf_ids
= { (1 << NUM_TSF_IDS
) - 1 },
220 /* no preference yet */
221 .preferred_tsf
= NUM_TSF_IDS
,
223 BIT(IWL_MVM_OFFCHANNEL_QUEUE
) |
224 BIT(IWL_MVM_AUX_QUEUE
) |
225 BIT(IWL_MVM_CMD_QUEUE
)
233 * Allocate a MAC ID and a TSF for this MAC, along with the queues
234 * and other resources.
238 * Before the iterator, we start with all MAC IDs and TSFs available.
240 * During iteration, all MAC IDs are cleared that are in use by other
241 * virtual interfaces, and all TSF IDs are cleared that can't be used
242 * by this new virtual interface because they're used by an interface
243 * that can't share it with the new one.
244 * At the same time, we check if there's a preferred TSF in the case
245 * that we should share it with another interface.
248 /* Currently, MAC ID 0 should be used only for the managed vif */
249 if (vif
->type
!= NL80211_IFTYPE_STATION
|| vif
->p2p
)
250 __clear_bit(0, data
.available_mac_ids
);
252 ieee80211_iterate_active_interfaces_atomic(
253 mvm
->hw
, IEEE80211_IFACE_ITER_RESUME_ALL
,
254 iwl_mvm_mac_iface_iterator
, &data
);
257 * In the case we're getting here during resume, it's similar to
258 * firmware restart, and with RESUME_ALL the iterator will find
259 * the vif being added already.
260 * We don't want to reassign any IDs in either case since doing
261 * so would probably assign different IDs (as interfaces aren't
262 * necessarily added in the same order), but the old IDs were
263 * preserved anyway, so skip ID assignment for both resume and
269 /* Therefore, in recovery, we can't get here */
270 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART
, &mvm
->status
));
272 mvmvif
->id
= find_first_bit(data
.available_mac_ids
,
273 NUM_MAC_INDEX_DRIVER
);
274 if (mvmvif
->id
== NUM_MAC_INDEX_DRIVER
) {
275 IWL_ERR(mvm
, "Failed to init MAC context - no free ID!\n");
280 if (data
.preferred_tsf
!= NUM_TSF_IDS
)
281 mvmvif
->tsf_id
= data
.preferred_tsf
;
283 mvmvif
->tsf_id
= find_first_bit(data
.available_tsf_ids
,
285 if (mvmvif
->tsf_id
== NUM_TSF_IDS
) {
286 IWL_ERR(mvm
, "Failed to init MAC context - no free TSF!\n");
293 INIT_LIST_HEAD(&mvmvif
->time_event_data
.list
);
294 mvmvif
->time_event_data
.id
= TE_MAX
;
296 /* No need to allocate data queues to P2P Device MAC.*/
297 if (vif
->type
== NL80211_IFTYPE_P2P_DEVICE
) {
298 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
299 vif
->hw_queue
[ac
] = IEEE80211_INVAL_HW_QUEUE
;
304 /* Find available queues, and allocate them to the ACs */
305 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
306 u8 queue
= find_first_zero_bit(data
.used_hw_queues
,
307 IWL_MVM_FIRST_AGG_QUEUE
);
309 if (queue
>= IWL_MVM_FIRST_AGG_QUEUE
) {
310 IWL_ERR(mvm
, "Failed to allocate queue\n");
315 __set_bit(queue
, data
.used_hw_queues
);
316 vif
->hw_queue
[ac
] = queue
;
319 /* Allocate the CAB queue for softAP and GO interfaces */
320 if (vif
->type
== NL80211_IFTYPE_AP
) {
321 u8 queue
= find_first_zero_bit(data
.used_hw_queues
,
322 IWL_MVM_FIRST_AGG_QUEUE
);
324 if (queue
>= IWL_MVM_FIRST_AGG_QUEUE
) {
325 IWL_ERR(mvm
, "Failed to allocate cab queue\n");
330 vif
->cab_queue
= queue
;
332 vif
->cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
335 mvmvif
->bcast_sta
.sta_id
= IWL_MVM_STATION_COUNT
;
336 mvmvif
->ap_sta_id
= IWL_MVM_STATION_COUNT
;
341 memset(mvmvif
, 0, sizeof(struct iwl_mvm_vif
));
342 memset(vif
->hw_queue
, IEEE80211_INVAL_HW_QUEUE
, sizeof(vif
->hw_queue
));
343 vif
->cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
347 int iwl_mvm_mac_ctxt_init(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
)
352 lockdep_assert_held(&mvm
->mutex
);
354 ret
= iwl_mvm_mac_ctxt_allocate_resources(mvm
, vif
);
359 case NL80211_IFTYPE_P2P_DEVICE
:
360 iwl_trans_ac_txq_enable(mvm
->trans
, IWL_MVM_OFFCHANNEL_QUEUE
,
363 case NL80211_IFTYPE_AP
:
364 iwl_trans_ac_txq_enable(mvm
->trans
, vif
->cab_queue
,
368 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
369 iwl_trans_ac_txq_enable(mvm
->trans
, vif
->hw_queue
[ac
],
370 iwl_mvm_ac_to_tx_fifo
[ac
]);
377 void iwl_mvm_mac_ctxt_release(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
)
381 lockdep_assert_held(&mvm
->mutex
);
384 case NL80211_IFTYPE_P2P_DEVICE
:
385 iwl_trans_txq_disable(mvm
->trans
, IWL_MVM_OFFCHANNEL_QUEUE
);
387 case NL80211_IFTYPE_AP
:
388 iwl_trans_txq_disable(mvm
->trans
, vif
->cab_queue
);
391 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
392 iwl_trans_txq_disable(mvm
->trans
, vif
->hw_queue
[ac
]);
396 static void iwl_mvm_ack_rates(struct iwl_mvm
*mvm
,
397 struct ieee80211_vif
*vif
,
398 enum ieee80211_band band
,
399 u8
*cck_rates
, u8
*ofdm_rates
)
401 struct ieee80211_supported_band
*sband
;
402 unsigned long basic
= vif
->bss_conf
.basic_rates
;
403 int lowest_present_ofdm
= 100;
404 int lowest_present_cck
= 100;
409 sband
= mvm
->hw
->wiphy
->bands
[band
];
411 for_each_set_bit(i
, &basic
, BITS_PER_LONG
) {
412 int hw
= sband
->bitrates
[i
].hw_value
;
413 if (hw
>= IWL_FIRST_OFDM_RATE
) {
414 ofdm
|= BIT(hw
- IWL_FIRST_OFDM_RATE
);
415 if (lowest_present_ofdm
> hw
)
416 lowest_present_ofdm
= hw
;
418 BUILD_BUG_ON(IWL_FIRST_CCK_RATE
!= 0);
421 if (lowest_present_cck
> hw
)
422 lowest_present_cck
= hw
;
427 * Now we've got the basic rates as bitmaps in the ofdm and cck
428 * variables. This isn't sufficient though, as there might not
429 * be all the right rates in the bitmap. E.g. if the only basic
430 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
431 * and 6 Mbps because the 802.11-2007 standard says in 9.6:
433 * [...] a STA responding to a received frame shall transmit
434 * its Control Response frame [...] at the highest rate in the
435 * BSSBasicRateSet parameter that is less than or equal to the
436 * rate of the immediately previous frame in the frame exchange
437 * sequence ([...]) and that is of the same modulation class
438 * ([...]) as the received frame. If no rate contained in the
439 * BSSBasicRateSet parameter meets these conditions, then the
440 * control frame sent in response to a received frame shall be
441 * transmitted at the highest mandatory rate of the PHY that is
442 * less than or equal to the rate of the received frame, and
443 * that is of the same modulation class as the received frame.
445 * As a consequence, we need to add all mandatory rates that are
446 * lower than all of the basic rates to these bitmaps.
449 if (IWL_RATE_24M_INDEX
< lowest_present_ofdm
)
450 ofdm
|= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE
;
451 if (IWL_RATE_12M_INDEX
< lowest_present_ofdm
)
452 ofdm
|= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE
;
453 /* 6M already there or needed so always add */
454 ofdm
|= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE
;
457 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
459 * - if no CCK rates are basic, it must be ERP since there must
460 * be some basic rates at all, so they're OFDM => ERP PHY
461 * (or we're in 5 GHz, and the cck bitmap will never be used)
462 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M
463 * - if 5.5M is basic, 1M and 2M are mandatory
464 * - if 2M is basic, 1M is mandatory
465 * - if 1M is basic, that's the only valid ACK rate.
466 * As a consequence, it's not as complicated as it sounds, just add
467 * any lower rates to the ACK rate bitmap.
469 if (IWL_RATE_11M_INDEX
< lowest_present_cck
)
470 cck
|= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE
;
471 if (IWL_RATE_5M_INDEX
< lowest_present_cck
)
472 cck
|= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE
;
473 if (IWL_RATE_2M_INDEX
< lowest_present_cck
)
474 cck
|= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE
;
475 /* 1M already there or needed so always add */
476 cck
|= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE
;
482 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm
*mvm
,
483 struct ieee80211_vif
*vif
,
484 struct iwl_mac_ctx_cmd
*cmd
,
487 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
488 struct ieee80211_chanctx_conf
*chanctx
;
489 u8 cck_ack_rates
, ofdm_ack_rates
;
492 cmd
->id_and_color
= cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
,
494 cmd
->action
= cpu_to_le32(action
);
497 case NL80211_IFTYPE_STATION
:
499 cmd
->mac_type
= cpu_to_le32(FW_MAC_TYPE_P2P_STA
);
501 cmd
->mac_type
= cpu_to_le32(FW_MAC_TYPE_BSS_STA
);
503 case NL80211_IFTYPE_AP
:
504 cmd
->mac_type
= cpu_to_le32(FW_MAC_TYPE_GO
);
506 case NL80211_IFTYPE_MONITOR
:
507 cmd
->mac_type
= cpu_to_le32(FW_MAC_TYPE_LISTENER
);
509 case NL80211_IFTYPE_P2P_DEVICE
:
510 cmd
->mac_type
= cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE
);
512 case NL80211_IFTYPE_ADHOC
:
513 cmd
->mac_type
= cpu_to_le32(FW_MAC_TYPE_IBSS
);
519 cmd
->tsf_id
= cpu_to_le32(mvmvif
->tsf_id
);
521 memcpy(cmd
->node_addr
, vif
->addr
, ETH_ALEN
);
522 if (vif
->bss_conf
.bssid
)
523 memcpy(cmd
->bssid_addr
, vif
->bss_conf
.bssid
, ETH_ALEN
);
525 eth_broadcast_addr(cmd
->bssid_addr
);
528 chanctx
= rcu_dereference(vif
->chanctx_conf
);
529 iwl_mvm_ack_rates(mvm
, vif
, chanctx
? chanctx
->def
.chan
->band
530 : IEEE80211_BAND_2GHZ
,
531 &cck_ack_rates
, &ofdm_ack_rates
);
534 cmd
->cck_rates
= cpu_to_le32((u32
)cck_ack_rates
);
535 cmd
->ofdm_rates
= cpu_to_le32((u32
)ofdm_ack_rates
);
537 cmd
->cck_short_preamble
=
538 cpu_to_le32(vif
->bss_conf
.use_short_preamble
?
539 MAC_FLG_SHORT_PREAMBLE
: 0);
541 cpu_to_le32(vif
->bss_conf
.use_short_slot
?
542 MAC_FLG_SHORT_SLOT
: 0);
544 for (i
= 0; i
< AC_NUM
; i
++) {
545 cmd
->ac
[i
].cw_min
= cpu_to_le16(mvmvif
->queue_params
[i
].cw_min
);
546 cmd
->ac
[i
].cw_max
= cpu_to_le16(mvmvif
->queue_params
[i
].cw_max
);
547 cmd
->ac
[i
].aifsn
= mvmvif
->queue_params
[i
].aifs
;
548 cmd
->ac
[i
].edca_txop
=
549 cpu_to_le16(mvmvif
->queue_params
[i
].txop
* 32);
550 cmd
->ac
[i
].fifos_mask
= BIT(iwl_mvm_ac_to_tx_fifo
[i
]);
553 if (vif
->bss_conf
.qos
)
554 cmd
->qos_flags
|= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA
);
556 /* Don't use cts to self as the fw doesn't support it currently. */
557 if (vif
->bss_conf
.use_cts_prot
)
558 cmd
->protection_flags
|= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT
);
561 * I think that we should enable these 2 flags regardless the HT PROT
562 * fields in the HT IE, but I am not sure. Someone knows whom to ask?...
564 if (vif
->bss_conf
.chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
565 cmd
->qos_flags
|= cpu_to_le32(MAC_QOS_FLG_TGN
);
566 cmd
->protection_flags
|= cpu_to_le32(MAC_PROT_FLG_HT_PROT
|
567 MAC_PROT_FLG_FAT_PROT
);
570 cmd
->filter_flags
= cpu_to_le32(MAC_FILTER_ACCEPT_GRP
);
573 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm
*mvm
,
574 struct iwl_mac_ctx_cmd
*cmd
)
576 int ret
= iwl_mvm_send_cmd_pdu(mvm
, MAC_CONTEXT_CMD
, CMD_SYNC
,
579 IWL_ERR(mvm
, "Failed to send MAC context (action:%d): %d\n",
580 le32_to_cpu(cmd
->action
), ret
);
585 * Fill the specific data for mac context of type station or p2p client
587 static void iwl_mvm_mac_ctxt_cmd_fill_sta(struct iwl_mvm
*mvm
,
588 struct ieee80211_vif
*vif
,
589 struct iwl_mac_data_sta
*ctxt_sta
)
591 /* We need the dtim_period to set the MAC as associated */
592 if (vif
->bss_conf
.assoc
&& vif
->bss_conf
.dtim_period
) {
596 * The DTIM count counts down, so when it is N that means N
597 * more beacon intervals happen until the DTIM TBTT. Therefore
598 * add this to the current time. If that ends up being in the
599 * future, the firmware will handle it.
601 * Also note that the system_timestamp (which we get here as
602 * "sync_device_ts") and TSF timestamp aren't at exactly the
603 * same offset in the frame -- the TSF is at the first symbol
604 * of the TSF, the system timestamp is at signal acquisition
605 * time. This means there's an offset between them of at most
606 * a few hundred microseconds (24 * 8 bits + PLCP time gives
607 * 384us in the longest case), this is currently not relevant
608 * as the firmware wakes up around 2ms before the TBTT.
610 dtim_offs
= vif
->bss_conf
.sync_dtim_count
*
611 vif
->bss_conf
.beacon_int
;
612 /* convert TU to usecs */
616 cpu_to_le64(vif
->bss_conf
.sync_tsf
+ dtim_offs
);
617 ctxt_sta
->dtim_time
=
618 cpu_to_le32(vif
->bss_conf
.sync_device_ts
+ dtim_offs
);
620 IWL_DEBUG_INFO(mvm
, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
621 le64_to_cpu(ctxt_sta
->dtim_tsf
),
622 le32_to_cpu(ctxt_sta
->dtim_time
),
625 ctxt_sta
->is_assoc
= cpu_to_le32(1);
627 ctxt_sta
->is_assoc
= cpu_to_le32(0);
630 ctxt_sta
->bi
= cpu_to_le32(vif
->bss_conf
.beacon_int
);
631 ctxt_sta
->bi_reciprocal
=
632 cpu_to_le32(iwl_mvm_reciprocal(vif
->bss_conf
.beacon_int
));
633 ctxt_sta
->dtim_interval
= cpu_to_le32(vif
->bss_conf
.beacon_int
*
634 vif
->bss_conf
.dtim_period
);
635 ctxt_sta
->dtim_reciprocal
=
636 cpu_to_le32(iwl_mvm_reciprocal(vif
->bss_conf
.beacon_int
*
637 vif
->bss_conf
.dtim_period
));
639 ctxt_sta
->listen_interval
= cpu_to_le32(mvm
->hw
->conf
.listen_interval
);
640 ctxt_sta
->assoc_id
= cpu_to_le32(vif
->bss_conf
.aid
);
643 static int iwl_mvm_mac_ctxt_cmd_station(struct iwl_mvm
*mvm
,
644 struct ieee80211_vif
*vif
,
647 struct iwl_mac_ctx_cmd cmd
= {};
649 WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
|| vif
->p2p
);
651 /* Fill the common data for all mac context types */
652 iwl_mvm_mac_ctxt_cmd_common(mvm
, vif
, &cmd
, action
);
654 /* Allow beacons to pass through as long as we are not associated,or we
655 * do not have dtim period information */
656 if (!vif
->bss_conf
.assoc
|| !vif
->bss_conf
.dtim_period
)
657 cmd
.filter_flags
|= cpu_to_le32(MAC_FILTER_IN_BEACON
);
659 cmd
.filter_flags
&= ~cpu_to_le32(MAC_FILTER_IN_BEACON
);
661 /* Fill the data specific for station mode */
662 iwl_mvm_mac_ctxt_cmd_fill_sta(mvm
, vif
, &cmd
.sta
);
664 return iwl_mvm_mac_ctxt_send_cmd(mvm
, &cmd
);
667 static int iwl_mvm_mac_ctxt_cmd_p2p_client(struct iwl_mvm
*mvm
,
668 struct ieee80211_vif
*vif
,
671 struct iwl_mac_ctx_cmd cmd
= {};
672 struct ieee80211_p2p_noa_attr
*noa
= &vif
->bss_conf
.p2p_noa_attr
;
674 WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
|| !vif
->p2p
);
676 /* Fill the common data for all mac context types */
677 iwl_mvm_mac_ctxt_cmd_common(mvm
, vif
, &cmd
, action
);
679 /* Fill the data specific for station mode */
680 iwl_mvm_mac_ctxt_cmd_fill_sta(mvm
, vif
, &cmd
.p2p_sta
.sta
);
682 cmd
.p2p_sta
.ctwin
= cpu_to_le32(noa
->oppps_ctwindow
&
683 IEEE80211_P2P_OPPPS_CTWINDOW_MASK
);
685 return iwl_mvm_mac_ctxt_send_cmd(mvm
, &cmd
);
688 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm
*mvm
,
689 struct ieee80211_vif
*vif
,
692 struct iwl_mac_ctx_cmd cmd
= {};
694 WARN_ON(vif
->type
!= NL80211_IFTYPE_MONITOR
);
696 iwl_mvm_mac_ctxt_cmd_common(mvm
, vif
, &cmd
, action
);
698 cmd
.filter_flags
= cpu_to_le32(MAC_FILTER_IN_PROMISC
|
699 MAC_FILTER_IN_CONTROL_AND_MGMT
|
700 MAC_FILTER_IN_BEACON
|
701 MAC_FILTER_IN_PROBE_REQUEST
);
703 return iwl_mvm_mac_ctxt_send_cmd(mvm
, &cmd
);
706 struct iwl_mvm_go_iterator_data
{
710 static void iwl_mvm_go_iterator(void *_data
, u8
*mac
, struct ieee80211_vif
*vif
)
712 struct iwl_mvm_go_iterator_data
*data
= _data
;
713 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
715 if (vif
->type
== NL80211_IFTYPE_AP
&& vif
->p2p
&& mvmvif
->ap_active
)
716 data
->go_active
= true;
719 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm
*mvm
,
720 struct ieee80211_vif
*vif
,
723 struct iwl_mac_ctx_cmd cmd
= {};
724 struct iwl_mvm_go_iterator_data data
= {};
726 WARN_ON(vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
);
728 iwl_mvm_mac_ctxt_cmd_common(mvm
, vif
, &cmd
, action
);
730 cmd
.protection_flags
|= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT
);
732 /* Override the filter flags to accept only probe requests */
733 cmd
.filter_flags
= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST
);
736 * This flag should be set to true when the P2P Device is
737 * discoverable and there is at least another active P2P GO. Settings
738 * this flag will allow the P2P Device to be discoverable on other
739 * channels in addition to its listen channel.
740 * Note that this flag should not be set in other cases as it opens the
741 * Rx filters on all MAC and increases the number of interrupts.
743 ieee80211_iterate_active_interfaces_atomic(
744 mvm
->hw
, IEEE80211_IFACE_ITER_RESUME_ALL
,
745 iwl_mvm_go_iterator
, &data
);
747 cmd
.p2p_dev
.is_disc_extended
= cpu_to_le32(data
.go_active
? 1 : 0);
748 return iwl_mvm_mac_ctxt_send_cmd(mvm
, &cmd
);
751 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm
*mvm
,
752 struct iwl_mac_beacon_cmd
*beacon_cmd
,
753 u8
*beacon
, u32 frame_size
)
756 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*)beacon
;
758 /* The index is relative to frame start but we start looking at the
759 * variable-length part of the beacon. */
760 tim_idx
= mgmt
->u
.beacon
.variable
- beacon
;
762 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
763 while ((tim_idx
< (frame_size
- 2)) &&
764 (beacon
[tim_idx
] != WLAN_EID_TIM
))
765 tim_idx
+= beacon
[tim_idx
+1] + 2;
767 /* If TIM field was found, set variables */
768 if ((tim_idx
< (frame_size
- 1)) && (beacon
[tim_idx
] == WLAN_EID_TIM
)) {
769 beacon_cmd
->tim_idx
= cpu_to_le32(tim_idx
);
770 beacon_cmd
->tim_size
= cpu_to_le32((u32
)beacon
[tim_idx
+1]);
772 IWL_WARN(mvm
, "Unable to find TIM Element in beacon\n");
776 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm
*mvm
,
777 struct ieee80211_vif
*vif
,
778 struct sk_buff
*beacon
)
780 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
781 struct iwl_host_cmd cmd
= {
782 .id
= BEACON_TEMPLATE_CMD
,
785 struct iwl_mac_beacon_cmd beacon_cmd
= {};
786 struct ieee80211_tx_info
*info
;
790 if (WARN_ON(!beacon
))
793 beacon_skb_len
= beacon
->len
;
795 /* TODO: for now the beacon template id is set to be the mac context id.
796 * Might be better to handle it as another resource ... */
797 beacon_cmd
.template_id
= cpu_to_le32((u32
)mvmvif
->id
);
799 /* Set up TX command fields */
800 beacon_cmd
.tx
.len
= cpu_to_le16((u16
)beacon_skb_len
);
801 beacon_cmd
.tx
.sta_id
= mvmvif
->bcast_sta
.sta_id
;
802 beacon_cmd
.tx
.life_time
= cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE
);
803 beacon_cmd
.tx
.tx_flags
= cpu_to_le32(TX_CMD_FLG_SEQ_CTL
|
807 mvm
->mgmt_last_antenna_idx
=
808 iwl_mvm_next_antenna(mvm
, iwl_fw_valid_tx_ant(mvm
->fw
),
809 mvm
->mgmt_last_antenna_idx
);
811 beacon_cmd
.tx
.rate_n_flags
=
812 cpu_to_le32(BIT(mvm
->mgmt_last_antenna_idx
) <<
815 info
= IEEE80211_SKB_CB(beacon
);
817 if (info
->band
== IEEE80211_BAND_5GHZ
|| vif
->p2p
) {
818 rate
= IWL_FIRST_OFDM_RATE
;
820 rate
= IWL_FIRST_CCK_RATE
;
821 beacon_cmd
.tx
.rate_n_flags
|= cpu_to_le32(RATE_MCS_CCK_MSK
);
823 beacon_cmd
.tx
.rate_n_flags
|=
824 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate
));
826 /* Set up TX beacon command fields */
827 iwl_mvm_mac_ctxt_set_tim(mvm
, &beacon_cmd
,
832 cmd
.len
[0] = sizeof(beacon_cmd
);
833 cmd
.data
[0] = &beacon_cmd
;
834 cmd
.dataflags
[0] = 0;
835 cmd
.len
[1] = beacon_skb_len
;
836 cmd
.data
[1] = beacon
->data
;
837 cmd
.dataflags
[1] = IWL_HCMD_DFL_DUP
;
839 return iwl_mvm_send_cmd(mvm
, &cmd
);
842 /* The beacon template for the AP/GO context has changed and needs update */
843 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm
*mvm
,
844 struct ieee80211_vif
*vif
)
846 struct sk_buff
*beacon
;
849 WARN_ON(vif
->type
!= NL80211_IFTYPE_AP
);
851 beacon
= ieee80211_beacon_get(mvm
->hw
, vif
);
855 ret
= iwl_mvm_mac_ctxt_send_beacon(mvm
, vif
, beacon
);
856 dev_kfree_skb(beacon
);
861 * Fill the specific data for mac context of type AP of P2P GO
863 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm
*mvm
,
864 struct ieee80211_vif
*vif
,
865 struct iwl_mac_data_ap
*ctxt_ap
,
868 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
870 ctxt_ap
->bi
= cpu_to_le32(vif
->bss_conf
.beacon_int
);
871 ctxt_ap
->bi_reciprocal
=
872 cpu_to_le32(iwl_mvm_reciprocal(vif
->bss_conf
.beacon_int
));
873 ctxt_ap
->dtim_interval
= cpu_to_le32(vif
->bss_conf
.beacon_int
*
874 vif
->bss_conf
.dtim_period
);
875 ctxt_ap
->dtim_reciprocal
=
876 cpu_to_le32(iwl_mvm_reciprocal(vif
->bss_conf
.beacon_int
*
877 vif
->bss_conf
.dtim_period
));
879 ctxt_ap
->mcast_qid
= cpu_to_le32(vif
->cab_queue
);
882 * Only read the system time when the MAC is being added, when we
883 * just modify the MAC then we should keep the time -- the firmware
884 * can otherwise have a "jumping" TBTT.
887 mvmvif
->ap_beacon_time
=
888 iwl_read_prph(mvm
->trans
, DEVICE_SYSTEM_TIME_REG
);
890 ctxt_ap
->beacon_time
= cpu_to_le32(mvmvif
->ap_beacon_time
);
892 ctxt_ap
->beacon_tsf
= 0; /* unused */
894 /* TODO: Assume that the beacon id == mac context id */
895 ctxt_ap
->beacon_template
= cpu_to_le32(mvmvif
->id
);
898 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm
*mvm
,
899 struct ieee80211_vif
*vif
,
902 struct iwl_mac_ctx_cmd cmd
= {};
904 WARN_ON(vif
->type
!= NL80211_IFTYPE_AP
|| vif
->p2p
);
906 /* Fill the common data for all mac context types */
907 iwl_mvm_mac_ctxt_cmd_common(mvm
, vif
, &cmd
, action
);
909 /* Also enable probe requests to pass */
910 cmd
.filter_flags
|= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST
);
912 /* Fill the data specific for ap mode */
913 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm
, vif
, &cmd
.ap
,
914 action
== FW_CTXT_ACTION_ADD
);
916 return iwl_mvm_mac_ctxt_send_cmd(mvm
, &cmd
);
919 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm
*mvm
,
920 struct ieee80211_vif
*vif
,
923 struct iwl_mac_ctx_cmd cmd
= {};
924 struct ieee80211_p2p_noa_attr
*noa
= &vif
->bss_conf
.p2p_noa_attr
;
926 WARN_ON(vif
->type
!= NL80211_IFTYPE_AP
|| !vif
->p2p
);
928 /* Fill the common data for all mac context types */
929 iwl_mvm_mac_ctxt_cmd_common(mvm
, vif
, &cmd
, action
);
931 /* Fill the data specific for GO mode */
932 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm
, vif
, &cmd
.go
.ap
,
933 action
== FW_CTXT_ACTION_ADD
);
935 cmd
.go
.ctwin
= cpu_to_le32(noa
->oppps_ctwindow
&
936 IEEE80211_P2P_OPPPS_CTWINDOW_MASK
);
937 cmd
.go
.opp_ps_enabled
=
938 cpu_to_le32(!!(noa
->oppps_ctwindow
&
939 IEEE80211_P2P_OPPPS_ENABLE_BIT
));
941 return iwl_mvm_mac_ctxt_send_cmd(mvm
, &cmd
);
944 static int iwl_mvm_mac_ctx_send(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
948 case NL80211_IFTYPE_STATION
:
950 return iwl_mvm_mac_ctxt_cmd_station(mvm
, vif
,
953 return iwl_mvm_mac_ctxt_cmd_p2p_client(mvm
, vif
,
956 case NL80211_IFTYPE_AP
:
958 return iwl_mvm_mac_ctxt_cmd_ap(mvm
, vif
, action
);
960 return iwl_mvm_mac_ctxt_cmd_go(mvm
, vif
, action
);
962 case NL80211_IFTYPE_MONITOR
:
963 return iwl_mvm_mac_ctxt_cmd_listener(mvm
, vif
, action
);
964 case NL80211_IFTYPE_P2P_DEVICE
:
965 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm
, vif
, action
);
973 int iwl_mvm_mac_ctxt_add(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
)
975 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
978 if (WARN_ONCE(mvmvif
->uploaded
, "Adding active MAC %pM/%d\n",
979 vif
->addr
, ieee80211_vif_type_p2p(vif
)))
982 ret
= iwl_mvm_mac_ctx_send(mvm
, vif
, FW_CTXT_ACTION_ADD
);
986 mvmvif
->uploaded
= true;
990 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
)
992 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
994 if (WARN_ONCE(!mvmvif
->uploaded
, "Changing inactive MAC %pM/%d\n",
995 vif
->addr
, ieee80211_vif_type_p2p(vif
)))
998 return iwl_mvm_mac_ctx_send(mvm
, vif
, FW_CTXT_ACTION_MODIFY
);
1001 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
)
1003 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
1004 struct iwl_mac_ctx_cmd cmd
;
1007 if (WARN_ONCE(!mvmvif
->uploaded
, "Removing inactive MAC %pM/%d\n",
1008 vif
->addr
, ieee80211_vif_type_p2p(vif
)))
1011 memset(&cmd
, 0, sizeof(cmd
));
1013 cmd
.id_and_color
= cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
,
1015 cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_REMOVE
);
1017 ret
= iwl_mvm_send_cmd_pdu(mvm
, MAC_CONTEXT_CMD
, CMD_SYNC
,
1020 IWL_ERR(mvm
, "Failed to remove MAC context: %d\n", ret
);
1024 mvmvif
->uploaded
= false;
1028 int iwl_mvm_rx_beacon_notif(struct iwl_mvm
*mvm
,
1029 struct iwl_rx_cmd_buffer
*rxb
,
1030 struct iwl_device_cmd
*cmd
)
1032 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1033 struct iwl_beacon_notif
*beacon
= (void *)pkt
->data
;
1034 u16 status __maybe_unused
=
1035 le16_to_cpu(beacon
->beacon_notify_hdr
.status
.status
);
1036 u32 rate __maybe_unused
=
1037 le32_to_cpu(beacon
->beacon_notify_hdr
.initial_rate
);
1039 IWL_DEBUG_RX(mvm
, "beacon status %#x retries:%d tsf:0x%16llX rate:%d\n",
1040 status
& TX_STATUS_MSK
,
1041 beacon
->beacon_notify_hdr
.failure_frame
,
1042 le64_to_cpu(beacon
->tsf
),