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 *****************************************************************************/
63 #include <net/mac80211.h>
69 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm)
73 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
75 lockdep_assert_held(&mvm->mutex);
77 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
78 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++)
79 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
80 lockdep_is_held(&mvm->mutex)))
82 return IWL_MVM_STATION_COUNT;
85 /* send station add/update command to firmware */
86 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
89 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
90 struct iwl_mvm_add_sta_cmd add_sta_cmd;
93 u32 agg_size = 0, mpdu_dens = 0;
95 memset(&add_sta_cmd, 0, sizeof(add_sta_cmd));
97 add_sta_cmd.sta_id = mvm_sta->sta_id;
98 add_sta_cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
100 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
101 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
103 add_sta_cmd.add_modify = update ? 1 : 0;
105 add_sta_cmd.station_flags_msk |= cpu_to_le32(STA_FLG_FAT_EN_MSK |
106 STA_FLG_MIMO_EN_MSK);
108 switch (sta->bandwidth) {
109 case IEEE80211_STA_RX_BW_160:
110 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
112 case IEEE80211_STA_RX_BW_80:
113 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
115 case IEEE80211_STA_RX_BW_40:
116 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
118 case IEEE80211_STA_RX_BW_20:
119 if (sta->ht_cap.ht_supported)
120 add_sta_cmd.station_flags |=
121 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
125 switch (sta->rx_nss) {
127 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
130 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
133 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
137 switch (sta->smps_mode) {
138 case IEEE80211_SMPS_AUTOMATIC:
139 case IEEE80211_SMPS_NUM_MODES:
142 case IEEE80211_SMPS_STATIC:
144 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
145 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
147 case IEEE80211_SMPS_DYNAMIC:
148 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
150 case IEEE80211_SMPS_OFF:
155 if (sta->ht_cap.ht_supported) {
156 add_sta_cmd.station_flags_msk |=
157 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
158 STA_FLG_AGG_MPDU_DENS_MSK);
160 mpdu_dens = sta->ht_cap.ampdu_density;
163 if (sta->vht_cap.vht_supported) {
164 agg_size = sta->vht_cap.cap &
165 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
167 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
168 } else if (sta->ht_cap.ht_supported) {
169 agg_size = sta->ht_cap.ampdu_factor;
172 add_sta_cmd.station_flags |=
173 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
174 add_sta_cmd.station_flags |=
175 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
177 status = ADD_STA_SUCCESS;
178 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(add_sta_cmd),
179 &add_sta_cmd, &status);
184 case ADD_STA_SUCCESS:
185 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
189 IWL_ERR(mvm, "ADD_STA failed\n");
196 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
197 struct ieee80211_vif *vif,
198 struct ieee80211_sta *sta)
200 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
201 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
204 lockdep_assert_held(&mvm->mutex);
206 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
207 sta_id = iwl_mvm_find_free_sta_id(mvm);
209 sta_id = mvm_sta->sta_id;
211 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
214 spin_lock_init(&mvm_sta->lock);
216 mvm_sta->sta_id = sta_id;
217 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
220 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
221 mvm_sta->tx_protection = 0;
222 mvm_sta->tt_tx_protection = false;
224 /* HW restart, don't assume the memory has been zeroed */
225 atomic_set(&mvm->pending_frames[sta_id], 0);
226 mvm_sta->tid_disable_agg = 0;
227 mvm_sta->tfd_queue_msk = 0;
228 for (i = 0; i < IEEE80211_NUM_ACS; i++)
229 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
230 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
232 /* for HW restart - need to reset the seq_number etc... */
233 memset(mvm_sta->tid_data, 0, sizeof(mvm_sta->tid_data));
235 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
239 /* The first station added is the AP, the others are TDLS STAs */
240 if (vif->type == NL80211_IFTYPE_STATION &&
241 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
242 mvmvif->ap_sta_id = sta_id;
244 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
249 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
250 struct ieee80211_vif *vif,
251 struct ieee80211_sta *sta)
253 return iwl_mvm_sta_send_to_fw(mvm, sta, true);
256 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
259 struct iwl_mvm_add_sta_cmd cmd = {};
263 lockdep_assert_held(&mvm->mutex);
265 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
266 cmd.sta_id = mvmsta->sta_id;
267 cmd.add_modify = STA_MODE_MODIFY;
268 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
269 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
271 status = ADD_STA_SUCCESS;
272 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
278 case ADD_STA_SUCCESS:
279 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
284 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
293 * Remove a station from the FW table. Before sending the command to remove
294 * the station validate that the station is indeed known to the driver (sanity
297 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
299 struct ieee80211_sta *sta;
300 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
305 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
306 lockdep_is_held(&mvm->mutex));
308 /* Note: internal stations are marked as error values */
310 IWL_ERR(mvm, "Invalid station id\n");
314 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, CMD_SYNC,
315 sizeof(rm_sta_cmd), &rm_sta_cmd);
317 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
324 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
326 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
330 * The mutex is needed because of the SYNC cmd, but not only: if the
331 * work would run concurrently with iwl_mvm_rm_sta, it would run before
332 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
333 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
336 mutex_lock(&mvm->mutex);
338 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
340 struct ieee80211_sta *sta =
341 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
342 lockdep_is_held(&mvm->mutex));
344 /* This station is in use */
348 if (PTR_ERR(sta) == -EINVAL) {
349 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
355 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
360 WARN_ON(PTR_ERR(sta) != -EBUSY);
361 /* This station was removed and we waited until it got drained,
362 * we can now proceed and remove it.
364 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
367 "Couldn't remove sta %d after it was drained\n",
371 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
372 clear_bit(sta_id, mvm->sta_drained);
375 mutex_unlock(&mvm->mutex);
378 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
379 struct ieee80211_vif *vif,
380 struct ieee80211_sta *sta)
382 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
383 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
386 lockdep_assert_held(&mvm->mutex);
388 if (vif->type == NL80211_IFTYPE_STATION &&
389 mvmvif->ap_sta_id == mvm_sta->sta_id) {
390 /* flush its queues here since we are freeing mvm_sta */
391 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true);
394 * Put a non-NULL since the fw station isn't removed.
395 * It will be removed after the MAC will be set as
398 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
401 /* if we are associated - we can't remove the AP STA now */
402 if (vif->bss_conf.assoc)
405 /* unassoc - go ahead - remove the AP STA now */
406 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
410 * Make sure that the tx response code sees the station as -EBUSY and
411 * calls the drain worker.
413 spin_lock_bh(&mvm_sta->lock);
415 * There are frames pending on the AC queues for this station.
416 * We need to wait until all the frames are drained...
418 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
419 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
421 spin_unlock_bh(&mvm_sta->lock);
422 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
424 spin_unlock_bh(&mvm_sta->lock);
425 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
426 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
432 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
433 struct ieee80211_vif *vif,
436 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
438 lockdep_assert_held(&mvm->mutex);
440 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
444 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta,
447 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
448 sta->sta_id = iwl_mvm_find_free_sta_id(mvm);
449 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
453 sta->tfd_queue_msk = qmask;
455 /* put a non-NULL value so iterating over the stations won't stop */
456 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
460 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
462 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
463 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
464 sta->sta_id = IWL_MVM_STATION_COUNT;
467 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
468 struct iwl_mvm_int_sta *sta,
470 u16 mac_id, u16 color)
472 struct iwl_mvm_add_sta_cmd cmd;
476 lockdep_assert_held(&mvm->mutex);
478 memset(&cmd, 0, sizeof(struct iwl_mvm_add_sta_cmd));
479 cmd.sta_id = sta->sta_id;
480 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
483 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
486 memcpy(cmd.addr, addr, ETH_ALEN);
488 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
494 case ADD_STA_SUCCESS:
495 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
499 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
506 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
510 lockdep_assert_held(&mvm->mutex);
512 /* Add the aux station, but without any queues */
513 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, 0);
517 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
521 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
526 * Send the add station command for the vif's broadcast station.
527 * Assumes that the station was already allocated.
529 * @mvm: the mvm component
530 * @vif: the interface to which the broadcast station is added
531 * @bsta: the broadcast station to add.
533 int iwl_mvm_send_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
534 struct iwl_mvm_int_sta *bsta)
536 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
537 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
539 lockdep_assert_held(&mvm->mutex);
541 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
544 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
545 mvmvif->id, mvmvif->color);
548 /* Send the FW a request to remove the station from it's internal data
549 * structures, but DO NOT remove the entry from the local data structures. */
550 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm,
551 struct iwl_mvm_int_sta *bsta)
555 lockdep_assert_held(&mvm->mutex);
557 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
559 IWL_WARN(mvm, "Failed sending remove station\n");
563 /* Allocate a new station entry for the broadcast station to the given vif,
564 * and send it to the FW.
565 * Note that each P2P mac should have its own broadcast station.
567 * @mvm: the mvm component
568 * @vif: the interface to which the broadcast station is added
569 * @bsta: the broadcast station to add. */
570 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
571 struct iwl_mvm_int_sta *bsta)
573 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
574 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
578 lockdep_assert_held(&mvm->mutex);
580 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
581 ret = iwl_mvm_allocate_int_sta(mvm, bsta, qmask);
585 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
586 mvmvif->id, mvmvif->color);
589 iwl_mvm_dealloc_int_sta(mvm, bsta);
594 * Send the FW a request to remove the station from it's internal data
595 * structures, and in addition remove it from the local data structure.
597 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *bsta)
601 lockdep_assert_held(&mvm->mutex);
603 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
607 iwl_mvm_dealloc_int_sta(mvm, bsta);
611 #define IWL_MAX_RX_BA_SESSIONS 16
613 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
614 int tid, u16 ssn, bool start)
616 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
617 struct iwl_mvm_add_sta_cmd cmd = {};
621 lockdep_assert_held(&mvm->mutex);
623 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
624 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
628 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
629 cmd.sta_id = mvm_sta->sta_id;
630 cmd.add_modify = STA_MODE_MODIFY;
632 cmd.add_immediate_ba_tid = (u8) tid;
633 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
635 cmd.remove_immediate_ba_tid = (u8) tid;
637 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
638 STA_MODIFY_REMOVE_BA_TID;
640 status = ADD_STA_SUCCESS;
641 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
647 case ADD_STA_SUCCESS:
648 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
649 start ? "start" : "stopp");
651 case ADD_STA_IMMEDIATE_BA_FAILURE:
652 IWL_WARN(mvm, "RX BA Session refused by fw\n");
657 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
658 start ? "start" : "stopp", status);
664 mvm->rx_ba_sessions++;
665 else if (mvm->rx_ba_sessions > 0)
666 /* check that restart flow didn't zero the counter */
667 mvm->rx_ba_sessions--;
673 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
674 int tid, u8 queue, bool start)
676 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
677 struct iwl_mvm_add_sta_cmd cmd = {};
681 lockdep_assert_held(&mvm->mutex);
684 mvm_sta->tfd_queue_msk |= BIT(queue);
685 mvm_sta->tid_disable_agg &= ~BIT(tid);
687 mvm_sta->tfd_queue_msk &= ~BIT(queue);
688 mvm_sta->tid_disable_agg |= BIT(tid);
691 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
692 cmd.sta_id = mvm_sta->sta_id;
693 cmd.add_modify = STA_MODE_MODIFY;
694 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
695 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
696 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
698 status = ADD_STA_SUCCESS;
699 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
705 case ADD_STA_SUCCESS:
709 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
710 start ? "start" : "stopp", status);
717 static const u8 tid_to_ac[] = {
728 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
729 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
731 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
732 struct iwl_mvm_tid_data *tid_data;
735 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
738 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
739 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
740 mvmsta->tid_data[tid].state);
744 lockdep_assert_held(&mvm->mutex);
746 for (txq_id = IWL_MVM_FIRST_AGG_QUEUE;
747 txq_id <= IWL_MVM_LAST_AGG_QUEUE; txq_id++)
748 if (mvm->queue_to_mac80211[txq_id] ==
749 IWL_INVALID_MAC80211_QUEUE)
752 if (txq_id > IWL_MVM_LAST_AGG_QUEUE) {
753 IWL_ERR(mvm, "Failed to allocate agg queue\n");
757 /* the new tx queue is still connected to the same mac80211 queue */
758 mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_ac[tid]];
760 spin_lock_bh(&mvmsta->lock);
761 tid_data = &mvmsta->tid_data[tid];
762 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
763 tid_data->txq_id = txq_id;
764 *ssn = tid_data->ssn;
766 IWL_DEBUG_TX_QUEUES(mvm,
767 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
768 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
769 tid_data->next_reclaimed);
771 if (tid_data->ssn == tid_data->next_reclaimed) {
772 tid_data->state = IWL_AGG_STARTING;
773 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
775 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
778 spin_unlock_bh(&mvmsta->lock);
783 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
784 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
786 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
787 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
788 int queue, fifo, ret;
791 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
793 spin_lock_bh(&mvmsta->lock);
795 queue = tid_data->txq_id;
796 tid_data->state = IWL_AGG_ON;
797 tid_data->ssn = 0xffff;
798 spin_unlock_bh(&mvmsta->lock);
800 fifo = iwl_mvm_ac_to_tx_fifo[tid_to_ac[tid]];
802 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
806 iwl_trans_txq_enable(mvm->trans, queue, fifo, mvmsta->sta_id, tid,
810 * Even though in theory the peer could have different
811 * aggregation reorder buffer sizes for different sessions,
812 * our ucode doesn't allow for that and has a global limit
813 * for each station. Therefore, use the minimum of all the
814 * aggregation sessions and our default value.
816 mvmsta->max_agg_bufsize =
817 min(mvmsta->max_agg_bufsize, buf_size);
818 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
820 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
823 if (mvm->cfg->ht_params->use_rts_for_aggregation) {
825 * switch to RTS/CTS if it is the prefer protection
826 * method for HT traffic
827 * this function also sends the LQ command
829 return iwl_mvm_tx_protection(mvm, &mvmsta->lq_sta.lq,
832 * TODO: remove the TLC_RTS flag when we tear down the last
833 * AGG session (agg_tids_count in DVM)
837 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, CMD_ASYNC, false);
840 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
841 struct ieee80211_sta *sta, u16 tid)
843 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
844 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
850 * If mac80211 is cleaning its state, then say that we finished since
851 * our state has been cleared anyway.
853 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
854 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
858 spin_lock_bh(&mvmsta->lock);
860 txq_id = tid_data->txq_id;
862 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
863 mvmsta->sta_id, tid, txq_id, tid_data->state);
865 switch (tid_data->state) {
867 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
869 IWL_DEBUG_TX_QUEUES(mvm,
870 "ssn = %d, next_recl = %d\n",
871 tid_data->ssn, tid_data->next_reclaimed);
873 /* There are still packets for this RA / TID in the HW */
874 if (tid_data->ssn != tid_data->next_reclaimed) {
875 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
880 tid_data->ssn = 0xffff;
881 iwl_trans_txq_disable(mvm->trans, txq_id);
883 case IWL_AGG_STARTING:
884 case IWL_EMPTYING_HW_QUEUE_ADDBA:
886 * The agg session has been stopped before it was set up. This
887 * can happen when the AddBA timer times out for example.
890 /* No barriers since we are under mutex */
891 lockdep_assert_held(&mvm->mutex);
892 mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE;
894 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
895 tid_data->state = IWL_AGG_OFF;
900 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
901 mvmsta->sta_id, tid, tid_data->state);
903 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
907 spin_unlock_bh(&mvmsta->lock);
912 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
913 struct ieee80211_sta *sta, u16 tid)
915 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
916 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
920 * First set the agg state to OFF to avoid calling
921 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
923 spin_lock_bh(&mvmsta->lock);
924 txq_id = tid_data->txq_id;
925 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
926 mvmsta->sta_id, tid, txq_id, tid_data->state);
927 tid_data->state = IWL_AGG_OFF;
928 spin_unlock_bh(&mvmsta->lock);
930 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true))
931 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
933 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
934 mvm->queue_to_mac80211[tid_data->txq_id] =
935 IWL_INVALID_MAC80211_QUEUE;
940 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
944 lockdep_assert_held(&mvm->mutex);
946 i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM);
948 if (i == STA_KEY_MAX_NUM)
949 return STA_KEY_IDX_INVALID;
951 __set_bit(i, mvm->fw_key_table);
956 static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif,
957 struct ieee80211_sta *sta)
959 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
962 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
964 return mvm_sta->sta_id;
968 * The device expects GTKs for station interfaces to be
969 * installed as GTKs for the AP station. If we have no
970 * station ID, then use AP's station ID.
972 if (vif->type == NL80211_IFTYPE_STATION &&
973 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT)
974 return mvmvif->ap_sta_id;
976 return IWL_MVM_STATION_COUNT;
979 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
980 struct iwl_mvm_sta *mvm_sta,
981 struct ieee80211_key_conf *keyconf,
982 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
986 struct iwl_mvm_add_sta_cmd cmd = {};
991 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
992 STA_KEY_FLG_KEYID_MSK;
993 key_flags = cpu_to_le16(keyidx);
994 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
996 switch (keyconf->cipher) {
997 case WLAN_CIPHER_SUITE_TKIP:
998 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
999 cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1000 for (i = 0; i < 5; i++)
1001 cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1002 memcpy(cmd.key.key, keyconf->key, keyconf->keylen);
1004 case WLAN_CIPHER_SUITE_CCMP:
1005 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1006 memcpy(cmd.key.key, keyconf->key, keyconf->keylen);
1013 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1014 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1016 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1017 cmd.key.key_offset = keyconf->hw_key_idx;
1018 cmd.key.key_flags = key_flags;
1019 cmd.add_modify = STA_MODE_MODIFY;
1020 cmd.modify_mask = STA_MODIFY_KEY;
1021 cmd.sta_id = sta_id;
1023 status = ADD_STA_SUCCESS;
1024 if (cmd_flags == CMD_SYNC)
1025 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
1028 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1032 case ADD_STA_SUCCESS:
1033 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1037 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1044 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1045 struct ieee80211_key_conf *keyconf,
1046 u8 sta_id, bool remove_key)
1048 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1050 /* verify the key details match the required command's expectations */
1051 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1052 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1053 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1056 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1057 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1060 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1062 struct ieee80211_key_seq seq;
1065 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1066 ieee80211_aes_cmac_calculate_k1_k2(keyconf,
1067 igtk_cmd.K1, igtk_cmd.K2);
1068 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1069 pn = seq.aes_cmac.pn;
1070 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1071 ((u64) pn[4] << 8) |
1072 ((u64) pn[3] << 16) |
1073 ((u64) pn[2] << 24) |
1074 ((u64) pn[1] << 32) |
1075 ((u64) pn[0] << 40));
1078 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1079 remove_key ? "removing" : "installing",
1082 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, CMD_SYNC,
1083 sizeof(igtk_cmd), &igtk_cmd);
1087 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1088 struct ieee80211_vif *vif,
1089 struct ieee80211_sta *sta)
1091 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1096 if (vif->type == NL80211_IFTYPE_STATION &&
1097 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1098 u8 sta_id = mvmvif->ap_sta_id;
1099 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1100 lockdep_is_held(&mvm->mutex));
1108 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1109 struct ieee80211_vif *vif,
1110 struct ieee80211_sta *sta,
1111 struct ieee80211_key_conf *keyconf,
1112 bool have_key_offset)
1114 struct iwl_mvm_sta *mvm_sta;
1117 struct ieee80211_key_seq seq;
1120 lockdep_assert_held(&mvm->mutex);
1122 /* Get the station id from the mvm local station table */
1123 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1124 if (sta_id == IWL_MVM_STATION_COUNT) {
1125 IWL_ERR(mvm, "Failed to find station id\n");
1129 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1130 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1135 * It is possible that the 'sta' parameter is NULL, and thus
1136 * there is a need to retrieve the sta from the local station table.
1139 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1140 lockdep_is_held(&mvm->mutex));
1141 if (IS_ERR_OR_NULL(sta)) {
1142 IWL_ERR(mvm, "Invalid station id\n");
1147 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1148 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1151 if (!have_key_offset) {
1153 * The D3 firmware hardcodes the PTK offset to 0, so we have to
1154 * configure it there. As a result, this workaround exists to
1155 * let the caller set the key offset (hw_key_idx), see d3.c.
1157 keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm);
1158 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1162 switch (keyconf->cipher) {
1163 case WLAN_CIPHER_SUITE_TKIP:
1164 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1165 /* get phase 1 key from mac80211 */
1166 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1167 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1168 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1169 seq.tkip.iv32, p1k, CMD_SYNC);
1171 case WLAN_CIPHER_SUITE_CCMP:
1172 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1176 IWL_ERR(mvm, "Unknown cipher %x\n", keyconf->cipher);
1181 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1184 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1185 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1190 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1191 struct ieee80211_vif *vif,
1192 struct ieee80211_sta *sta,
1193 struct ieee80211_key_conf *keyconf)
1195 struct iwl_mvm_sta *mvm_sta;
1196 struct iwl_mvm_add_sta_cmd cmd = {};
1201 lockdep_assert_held(&mvm->mutex);
1203 /* Get the station id from the mvm local station table */
1204 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1206 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1207 keyconf->keyidx, sta_id);
1209 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1210 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1212 ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1214 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1215 keyconf->hw_key_idx);
1219 if (sta_id == IWL_MVM_STATION_COUNT) {
1220 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1225 * It is possible that the 'sta' parameter is NULL, and thus
1226 * there is a need to retrieve the sta from the local station table,
1227 * for example when a GTK is removed (where the sta_id will then be
1228 * the AP ID, and no station was passed by mac80211.)
1231 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1232 lockdep_is_held(&mvm->mutex));
1234 IWL_ERR(mvm, "Invalid station id\n");
1239 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1240 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1243 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1244 STA_KEY_FLG_KEYID_MSK);
1245 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1246 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1248 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1249 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1251 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1252 cmd.key.key_flags = key_flags;
1253 cmd.key.key_offset = keyconf->hw_key_idx;
1254 cmd.sta_id = sta_id;
1256 cmd.modify_mask = STA_MODIFY_KEY;
1257 cmd.add_modify = STA_MODE_MODIFY;
1259 status = ADD_STA_SUCCESS;
1260 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
1264 case ADD_STA_SUCCESS:
1265 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1269 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1276 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1277 struct ieee80211_vif *vif,
1278 struct ieee80211_key_conf *keyconf,
1279 struct ieee80211_sta *sta, u32 iv32,
1282 struct iwl_mvm_sta *mvm_sta;
1283 u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1285 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
1291 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1292 if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1298 mvm_sta = (void *)sta->drv_priv;
1299 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1300 iv32, phase1key, CMD_ASYNC);
1304 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1305 struct ieee80211_sta *sta)
1307 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
1308 struct iwl_mvm_add_sta_cmd cmd = {
1309 .add_modify = STA_MODE_MODIFY,
1310 .sta_id = mvmsta->sta_id,
1311 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
1312 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1316 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1318 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1321 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1322 struct ieee80211_sta *sta,
1323 enum ieee80211_frame_release_type reason,
1326 u16 sleep_state_flags =
1327 (reason == IEEE80211_FRAME_RELEASE_UAPSD) ?
1328 STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL;
1329 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
1330 struct iwl_mvm_add_sta_cmd cmd = {
1331 .add_modify = STA_MODE_MODIFY,
1332 .sta_id = mvmsta->sta_id,
1333 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1334 .sleep_tx_count = cpu_to_le16(cnt),
1335 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1337 * Same modify mask for sleep_tx_count and sleep_state_flags so
1338 * we must set the sleep_state_flags too.
1340 .sleep_state_flags = cpu_to_le16(sleep_state_flags),
1344 /* TODO: somehow the fw doesn't seem to take PS_POLL into account */
1345 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1347 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);