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 LICENSE.GPL.
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.
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37 * modification, are permitted provided that the following conditions
40 * * Redistributions of source code must retain the above copyright
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48 * from this software without specific prior written permission.
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60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *****************************************************************************/
63 #include <net/mac80211.h>
68 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm)
72 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
74 lockdep_assert_held(&mvm->mutex);
76 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
77 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++)
78 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
79 lockdep_is_held(&mvm->mutex)))
81 return IWL_MVM_STATION_COUNT;
84 /* send station add/update command to firmware */
85 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
88 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
89 struct iwl_mvm_add_sta_cmd add_sta_cmd;
92 u32 agg_size = 0, mpdu_dens = 0;
94 memset(&add_sta_cmd, 0, sizeof(add_sta_cmd));
96 add_sta_cmd.sta_id = mvm_sta->sta_id;
97 add_sta_cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
99 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
100 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
102 add_sta_cmd.add_modify = update ? 1 : 0;
104 /* STA_FLG_FAT_EN_MSK ? */
105 /* STA_FLG_MIMO_EN_MSK ? */
107 if (sta->ht_cap.ht_supported) {
108 add_sta_cmd.station_flags_msk |=
109 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
110 STA_FLG_AGG_MPDU_DENS_MSK);
112 mpdu_dens = sta->ht_cap.ampdu_density;
115 if (sta->vht_cap.vht_supported) {
116 agg_size = sta->vht_cap.cap &
117 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
119 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
120 } else if (sta->ht_cap.ht_supported) {
121 agg_size = sta->ht_cap.ampdu_factor;
124 add_sta_cmd.station_flags |=
125 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
126 add_sta_cmd.station_flags |=
127 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
129 status = ADD_STA_SUCCESS;
130 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(add_sta_cmd),
131 &add_sta_cmd, &status);
136 case ADD_STA_SUCCESS:
137 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
141 IWL_ERR(mvm, "ADD_STA failed\n");
148 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
149 struct ieee80211_vif *vif,
150 struct ieee80211_sta *sta)
152 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
153 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
156 lockdep_assert_held(&mvm->mutex);
158 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
159 sta_id = iwl_mvm_find_free_sta_id(mvm);
161 sta_id = mvm_sta->sta_id;
163 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
166 spin_lock_init(&mvm_sta->lock);
168 mvm_sta->sta_id = sta_id;
169 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
172 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
174 /* HW restart, don't assume the memory has been zeroed */
175 atomic_set(&mvm_sta->pending_frames, 0);
176 mvm_sta->tid_disable_agg = 0;
177 mvm_sta->tfd_queue_msk = 0;
178 for (i = 0; i < IEEE80211_NUM_ACS; i++)
179 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
180 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
182 if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
183 mvm_sta->tfd_queue_msk |= BIT(vif->cab_queue);
185 /* for HW restart - need to reset the seq_number etc... */
186 memset(mvm_sta->tid_data, 0, sizeof(mvm_sta->tid_data));
188 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
192 /* The first station added is the AP, the others are TDLS STAs */
193 if (vif->type == NL80211_IFTYPE_STATION &&
194 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
195 mvmvif->ap_sta_id = sta_id;
197 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
202 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
203 struct ieee80211_vif *vif,
204 struct ieee80211_sta *sta)
206 return iwl_mvm_sta_send_to_fw(mvm, sta, true);
209 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
212 struct iwl_mvm_add_sta_cmd cmd = {};
216 lockdep_assert_held(&mvm->mutex);
218 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
219 cmd.sta_id = mvmsta->sta_id;
220 cmd.add_modify = STA_MODE_MODIFY;
221 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
222 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
224 status = ADD_STA_SUCCESS;
225 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
231 case ADD_STA_SUCCESS:
232 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
237 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
246 * Remove a station from the FW table. Before sending the command to remove
247 * the station validate that the station is indeed known to the driver (sanity
250 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
252 struct ieee80211_sta *sta;
253 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
258 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
259 lockdep_is_held(&mvm->mutex));
261 /* Note: internal stations are marked as error values */
263 IWL_ERR(mvm, "Invalid station id\n");
267 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, CMD_SYNC,
268 sizeof(rm_sta_cmd), &rm_sta_cmd);
270 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
277 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
279 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
283 * The mutex is needed because of the SYNC cmd, but not only: if the
284 * work would run concurrently with iwl_mvm_rm_sta, it would run before
285 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
286 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
289 mutex_lock(&mvm->mutex);
291 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
293 struct ieee80211_sta *sta =
294 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
295 lockdep_is_held(&mvm->mutex));
297 /* This station is in use */
301 if (PTR_ERR(sta) == -EINVAL) {
302 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
308 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
313 WARN_ON(PTR_ERR(sta) != -EBUSY);
314 /* This station was removed and we waited until it got drained,
315 * we can now proceed and remove it.
317 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
320 "Couldn't remove sta %d after it was drained\n",
324 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
325 clear_bit(sta_id, mvm->sta_drained);
328 mutex_unlock(&mvm->mutex);
331 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
332 struct ieee80211_vif *vif,
333 struct ieee80211_sta *sta)
335 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
336 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
339 lockdep_assert_held(&mvm->mutex);
341 if (vif->type == NL80211_IFTYPE_STATION &&
342 mvmvif->ap_sta_id == mvm_sta->sta_id) {
344 * Put a non-NULL since the fw station isn't removed.
345 * It will be removed after the MAC will be set as
348 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
351 /* flush its queues here since we are freeing mvm_sta */
352 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true);
354 /* if we are associated - we can't remove the AP STA now */
355 if (vif->bss_conf.assoc)
358 /* unassoc - go ahead - remove the AP STA now */
359 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
363 * There are frames pending on the AC queues for this station.
364 * We need to wait until all the frames are drained...
366 if (atomic_read(&mvm_sta->pending_frames)) {
367 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
368 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
371 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
372 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
378 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
379 struct ieee80211_vif *vif,
382 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
384 lockdep_assert_held(&mvm->mutex);
386 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
390 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta,
393 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
394 sta->sta_id = iwl_mvm_find_free_sta_id(mvm);
395 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
399 sta->tfd_queue_msk = qmask;
401 /* put a non-NULL value so iterating over the stations won't stop */
402 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
406 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
408 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
409 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
410 sta->sta_id = IWL_MVM_STATION_COUNT;
413 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
414 struct iwl_mvm_int_sta *sta,
416 u16 mac_id, u16 color)
418 struct iwl_mvm_add_sta_cmd cmd;
422 lockdep_assert_held(&mvm->mutex);
424 memset(&cmd, 0, sizeof(struct iwl_mvm_add_sta_cmd));
425 cmd.sta_id = sta->sta_id;
426 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
429 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
432 memcpy(cmd.addr, addr, ETH_ALEN);
434 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
440 case ADD_STA_SUCCESS:
441 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
445 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
452 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
456 lockdep_assert_held(&mvm->mutex);
458 /* Add the aux station, but without any queues */
459 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, 0);
463 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
467 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
472 * Send the add station command for the vif's broadcast station.
473 * Assumes that the station was already allocated.
475 * @mvm: the mvm component
476 * @vif: the interface to which the broadcast station is added
477 * @bsta: the broadcast station to add.
479 int iwl_mvm_send_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
480 struct iwl_mvm_int_sta *bsta)
482 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
483 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
485 lockdep_assert_held(&mvm->mutex);
487 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
490 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
491 mvmvif->id, mvmvif->color);
494 /* Send the FW a request to remove the station from it's internal data
495 * structures, but DO NOT remove the entry from the local data structures. */
496 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm,
497 struct iwl_mvm_int_sta *bsta)
501 lockdep_assert_held(&mvm->mutex);
503 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
505 IWL_WARN(mvm, "Failed sending remove station\n");
509 /* Allocate a new station entry for the broadcast station to the given vif,
510 * and send it to the FW.
511 * Note that each P2P mac should have its own broadcast station.
513 * @mvm: the mvm component
514 * @vif: the interface to which the broadcast station is added
515 * @bsta: the broadcast station to add. */
516 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
517 struct iwl_mvm_int_sta *bsta)
519 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
520 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
524 lockdep_assert_held(&mvm->mutex);
526 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
527 ret = iwl_mvm_allocate_int_sta(mvm, bsta, qmask);
531 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
532 mvmvif->id, mvmvif->color);
535 iwl_mvm_dealloc_int_sta(mvm, bsta);
540 * Send the FW a request to remove the station from it's internal data
541 * structures, and in addition remove it from the local data structure.
543 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *bsta)
547 lockdep_assert_held(&mvm->mutex);
549 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
553 iwl_mvm_dealloc_int_sta(mvm, bsta);
557 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
558 int tid, u16 ssn, bool start)
560 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
561 struct iwl_mvm_add_sta_cmd cmd = {};
565 lockdep_assert_held(&mvm->mutex);
567 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
568 cmd.sta_id = mvm_sta->sta_id;
569 cmd.add_modify = STA_MODE_MODIFY;
570 cmd.add_immediate_ba_tid = (u8) tid;
571 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
572 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
573 STA_MODIFY_REMOVE_BA_TID;
575 status = ADD_STA_SUCCESS;
576 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
582 case ADD_STA_SUCCESS:
583 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
584 start ? "start" : "stopp");
586 case ADD_STA_IMMEDIATE_BA_FAILURE:
587 IWL_WARN(mvm, "RX BA Session refused by fw\n");
592 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
593 start ? "start" : "stopp", status);
600 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
601 int tid, u8 queue, bool start)
603 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
604 struct iwl_mvm_add_sta_cmd cmd = {};
608 lockdep_assert_held(&mvm->mutex);
611 mvm_sta->tfd_queue_msk |= BIT(queue);
612 mvm_sta->tid_disable_agg &= ~BIT(tid);
614 mvm_sta->tfd_queue_msk &= ~BIT(queue);
615 mvm_sta->tid_disable_agg |= BIT(tid);
618 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
619 cmd.sta_id = mvm_sta->sta_id;
620 cmd.add_modify = STA_MODE_MODIFY;
621 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
622 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
623 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
625 status = ADD_STA_SUCCESS;
626 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
632 case ADD_STA_SUCCESS:
636 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
637 start ? "start" : "stopp", status);
644 static const u8 tid_to_ac[] = {
655 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
656 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
658 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
659 struct iwl_mvm_tid_data *tid_data;
662 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
665 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
666 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
667 mvmsta->tid_data[tid].state);
671 lockdep_assert_held(&mvm->mutex);
673 for (txq_id = IWL_MVM_FIRST_AGG_QUEUE;
674 txq_id <= IWL_MVM_LAST_AGG_QUEUE; txq_id++)
675 if (mvm->queue_to_mac80211[txq_id] ==
676 IWL_INVALID_MAC80211_QUEUE)
679 if (txq_id > IWL_MVM_LAST_AGG_QUEUE) {
680 IWL_ERR(mvm, "Failed to allocate agg queue\n");
684 /* the new tx queue is still connected to the same mac80211 queue */
685 mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_ac[tid]];
687 spin_lock_bh(&mvmsta->lock);
688 tid_data = &mvmsta->tid_data[tid];
689 tid_data->ssn = SEQ_TO_SN(tid_data->seq_number);
690 tid_data->txq_id = txq_id;
691 *ssn = tid_data->ssn;
693 IWL_DEBUG_TX_QUEUES(mvm,
694 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
695 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
696 tid_data->next_reclaimed);
698 if (tid_data->ssn == tid_data->next_reclaimed) {
699 tid_data->state = IWL_AGG_STARTING;
700 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
702 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
705 spin_unlock_bh(&mvmsta->lock);
710 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
711 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
713 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
714 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
715 int queue, fifo, ret;
718 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
720 spin_lock_bh(&mvmsta->lock);
722 queue = tid_data->txq_id;
723 tid_data->state = IWL_AGG_ON;
724 tid_data->ssn = 0xffff;
725 spin_unlock_bh(&mvmsta->lock);
727 fifo = iwl_mvm_ac_to_tx_fifo[tid_to_ac[tid]];
729 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
733 iwl_trans_txq_enable(mvm->trans, queue, fifo, mvmsta->sta_id, tid,
737 * Even though in theory the peer could have different
738 * aggregation reorder buffer sizes for different sessions,
739 * our ucode doesn't allow for that and has a global limit
740 * for each station. Therefore, use the minimum of all the
741 * aggregation sessions and our default value.
743 mvmsta->max_agg_bufsize =
744 min(mvmsta->max_agg_bufsize, buf_size);
745 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
747 if (mvm->cfg->ht_params->use_rts_for_aggregation) {
749 * switch to RTS/CTS if it is the prefer protection
750 * method for HT traffic
752 mvmsta->lq_sta.lq.flags |= LQ_FLAG_SET_STA_TLC_RTS_MSK;
754 * TODO: remove the TLC_RTS flag when we tear down the last
755 * AGG session (agg_tids_count in DVM)
759 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
762 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, CMD_ASYNC, false);
765 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
766 struct ieee80211_sta *sta, u16 tid)
768 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
769 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
775 * If mac80211 is cleaning its state, then say that we finished since
776 * our state has been cleared anyway.
778 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
779 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
783 spin_lock_bh(&mvmsta->lock);
785 txq_id = tid_data->txq_id;
787 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
788 mvmsta->sta_id, tid, txq_id, tid_data->state);
790 switch (tid_data->state) {
792 tid_data->ssn = SEQ_TO_SN(tid_data->seq_number);
794 IWL_DEBUG_TX_QUEUES(mvm,
795 "ssn = %d, next_recl = %d\n",
796 tid_data->ssn, tid_data->next_reclaimed);
798 /* There are still packets for this RA / TID in the HW */
799 if (tid_data->ssn != tid_data->next_reclaimed) {
800 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
805 tid_data->ssn = 0xffff;
806 iwl_trans_txq_disable(mvm->trans, txq_id);
808 case IWL_AGG_STARTING:
809 case IWL_EMPTYING_HW_QUEUE_ADDBA:
811 * The agg session has been stopped before it was set up. This
812 * can happen when the AddBA timer times out for example.
815 /* No barriers since we are under mutex */
816 lockdep_assert_held(&mvm->mutex);
817 mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE;
819 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
820 tid_data->state = IWL_AGG_OFF;
825 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
826 mvmsta->sta_id, tid, tid_data->state);
828 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
832 spin_unlock_bh(&mvmsta->lock);
837 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
841 lockdep_assert_held(&mvm->mutex);
843 i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM);
845 if (i == STA_KEY_MAX_NUM)
846 return STA_KEY_IDX_INVALID;
848 __set_bit(i, mvm->fw_key_table);
853 static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif,
854 struct ieee80211_sta *sta)
856 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
859 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
861 return mvm_sta->sta_id;
865 * The device expects GTKs for station interfaces to be
866 * installed as GTKs for the AP station. If we have no
867 * station ID, then use AP's station ID.
869 if (vif->type == NL80211_IFTYPE_STATION &&
870 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT)
871 return mvmvif->ap_sta_id;
873 return IWL_INVALID_STATION;
876 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
877 struct iwl_mvm_sta *mvm_sta,
878 struct ieee80211_key_conf *keyconf,
879 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
883 struct iwl_mvm_add_sta_cmd cmd = {};
888 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
889 STA_KEY_FLG_KEYID_MSK;
890 key_flags = cpu_to_le16(keyidx);
891 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
893 switch (keyconf->cipher) {
894 case WLAN_CIPHER_SUITE_TKIP:
895 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
896 cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
897 for (i = 0; i < 5; i++)
898 cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
899 memcpy(cmd.key.key, keyconf->key, keyconf->keylen);
901 case WLAN_CIPHER_SUITE_CCMP:
902 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
903 memcpy(cmd.key.key, keyconf->key, keyconf->keylen);
910 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
911 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
913 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
914 cmd.key.key_offset = keyconf->hw_key_idx;
915 cmd.key.key_flags = key_flags;
916 cmd.add_modify = STA_MODE_MODIFY;
917 cmd.modify_mask = STA_MODIFY_KEY;
920 status = ADD_STA_SUCCESS;
921 if (cmd_flags == CMD_SYNC)
922 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
925 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
929 case ADD_STA_SUCCESS:
930 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
934 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
941 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
942 struct ieee80211_key_conf *keyconf,
943 u8 sta_id, bool remove_key)
945 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
947 /* verify the key details match the required command's expectations */
948 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
949 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
950 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
953 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
954 igtk_cmd.sta_id = cpu_to_le32(sta_id);
957 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
959 struct ieee80211_key_seq seq;
962 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
963 ieee80211_aes_cmac_calculate_k1_k2(keyconf,
964 igtk_cmd.K1, igtk_cmd.K2);
965 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
966 pn = seq.aes_cmac.pn;
967 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
969 ((u64) pn[3] << 16) |
970 ((u64) pn[2] << 24) |
971 ((u64) pn[1] << 32) |
972 ((u64) pn[0] << 40));
975 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
976 remove_key ? "removing" : "installing",
979 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, CMD_SYNC,
980 sizeof(igtk_cmd), &igtk_cmd);
984 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
985 struct ieee80211_vif *vif,
986 struct ieee80211_sta *sta)
988 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
993 if (vif->type == NL80211_IFTYPE_STATION &&
994 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
995 u8 sta_id = mvmvif->ap_sta_id;
996 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
997 lockdep_is_held(&mvm->mutex));
1005 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1006 struct ieee80211_vif *vif,
1007 struct ieee80211_sta *sta,
1008 struct ieee80211_key_conf *keyconf,
1009 bool have_key_offset)
1011 struct iwl_mvm_sta *mvm_sta;
1014 struct ieee80211_key_seq seq;
1017 lockdep_assert_held(&mvm->mutex);
1019 /* Get the station id from the mvm local station table */
1020 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1021 if (sta_id == IWL_INVALID_STATION) {
1022 IWL_ERR(mvm, "Failed to find station id\n");
1026 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1027 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1032 * It is possible that the 'sta' parameter is NULL, and thus
1033 * there is a need to retrieve the sta from the local station table.
1036 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1037 lockdep_is_held(&mvm->mutex));
1038 if (IS_ERR_OR_NULL(sta)) {
1039 IWL_ERR(mvm, "Invalid station id\n");
1044 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1045 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1048 if (!have_key_offset) {
1050 * The D3 firmware hardcodes the PTK offset to 0, so we have to
1051 * configure it there. As a result, this workaround exists to
1052 * let the caller set the key offset (hw_key_idx), see d3.c.
1054 keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm);
1055 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1059 switch (keyconf->cipher) {
1060 case WLAN_CIPHER_SUITE_TKIP:
1061 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1062 /* get phase 1 key from mac80211 */
1063 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1064 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1065 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1066 seq.tkip.iv32, p1k, CMD_SYNC);
1068 case WLAN_CIPHER_SUITE_CCMP:
1069 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1073 IWL_ERR(mvm, "Unknown cipher %x\n", keyconf->cipher);
1078 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1081 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1082 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1087 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1088 struct ieee80211_vif *vif,
1089 struct ieee80211_sta *sta,
1090 struct ieee80211_key_conf *keyconf)
1092 struct iwl_mvm_sta *mvm_sta;
1093 struct iwl_mvm_add_sta_cmd cmd = {};
1098 lockdep_assert_held(&mvm->mutex);
1100 /* Get the station id from the mvm local station table */
1101 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1103 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1104 keyconf->keyidx, sta_id);
1106 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1107 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1109 ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1111 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1112 keyconf->hw_key_idx);
1116 if (sta_id == IWL_INVALID_STATION) {
1117 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1122 * It is possible that the 'sta' parameter is NULL, and thus
1123 * there is a need to retrieve the sta from the local station table,
1124 * for example when a GTK is removed (where the sta_id will then be
1125 * the AP ID, and no station was passed by mac80211.)
1128 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1129 lockdep_is_held(&mvm->mutex));
1131 IWL_ERR(mvm, "Invalid station id\n");
1136 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1137 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1140 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1141 STA_KEY_FLG_KEYID_MSK);
1142 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1143 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1145 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1146 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1148 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1149 cmd.key.key_flags = key_flags;
1150 cmd.key.key_offset = keyconf->hw_key_idx;
1151 cmd.sta_id = sta_id;
1153 cmd.modify_mask = STA_MODIFY_KEY;
1154 cmd.add_modify = STA_MODE_MODIFY;
1156 status = ADD_STA_SUCCESS;
1157 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
1161 case ADD_STA_SUCCESS:
1162 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1166 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1173 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1174 struct ieee80211_vif *vif,
1175 struct ieee80211_key_conf *keyconf,
1176 struct ieee80211_sta *sta, u32 iv32,
1179 struct iwl_mvm_sta *mvm_sta;
1180 u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1182 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
1188 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1189 if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1195 mvm_sta = (void *)sta->drv_priv;
1196 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1197 iv32, phase1key, CMD_ASYNC);
1201 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1202 struct ieee80211_sta *sta)
1204 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
1205 struct iwl_mvm_add_sta_cmd cmd = {
1206 .add_modify = STA_MODE_MODIFY,
1207 .sta_id = mvmsta->sta_id,
1208 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1209 .sleep_state_flags = cpu_to_le16(STA_SLEEP_STATE_AWAKE),
1210 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1215 * Same modify mask for sleep_tx_count and sleep_state_flags but this
1216 * should be fine since if we set the STA as "awake", then
1217 * sleep_tx_count is not relevant.
1219 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1221 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1224 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1225 struct ieee80211_sta *sta,
1226 enum ieee80211_frame_release_type reason,
1229 u16 sleep_state_flags =
1230 (reason == IEEE80211_FRAME_RELEASE_UAPSD) ?
1231 STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL;
1232 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
1233 struct iwl_mvm_add_sta_cmd cmd = {
1234 .add_modify = STA_MODE_MODIFY,
1235 .sta_id = mvmsta->sta_id,
1236 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1237 .sleep_tx_count = cpu_to_le16(cnt),
1238 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1240 * Same modify mask for sleep_tx_count and sleep_state_flags so
1241 * we must set the sleep_state_flags too.
1243 .sleep_state_flags = cpu_to_le16(sleep_state_flags),
1247 /* TODO: somehow the fw doesn't seem to take PS_POLL into account */
1248 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1250 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);