Google Git
Sign in
coral / linux-imx / 0fe59fea0c303ad8f90417adf8185c07d6f10143 / . / drivers / net / wireless / intel / iwlwifi / mvm / sta.c
blob: e64aeb4a22043002a4b5bd75dfb7dc86846d3c51 [file] [log] [blame]
/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2016 Intel Deutschland GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <linuxwifi@intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2016 Intel Deutschland GmbH
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/
#include <net/mac80211.h>
#include "mvm.h"
#include "sta.h"
#include "rs.h"
/*
* New version of ADD_STA_sta command added new fields at the end of the
* structure, so sending the size of the relevant API's structure is enough to
* support both API versions.
*/
static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
{
return iwl_mvm_has_new_rx_api(mvm) ?
sizeof(struct iwl_mvm_add_sta_cmd) :
sizeof(struct iwl_mvm_add_sta_cmd_v7);
}
static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
enum nl80211_iftype iftype)
{
int sta_id;
u32 reserved_ids = 0;
BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
lockdep_assert_held(&mvm->mutex);
/* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
if (iftype != NL80211_IFTYPE_STATION)
reserved_ids = BIT(0);
/* Don't take rcu_read_lock() since we are protected by mvm->mutex */
for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
if (BIT(sta_id) & reserved_ids)
continue;
if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex)))
return sta_id;
}
return IWL_MVM_STATION_COUNT;
}
/* send station add/update command to firmware */
int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
bool update, unsigned int flags)
{
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_add_sta_cmd add_sta_cmd = {
.sta_id = mvm_sta->sta_id,
.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
.add_modify = update ? 1 : 0,
.station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
STA_FLG_MIMO_EN_MSK),
.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
};
int ret;
u32 status;
u32 agg_size = 0, mpdu_dens = 0;
if (!update || (flags & STA_MODIFY_QUEUES)) {
add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
if (flags & STA_MODIFY_QUEUES)
add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
}
switch (sta->bandwidth) {
case IEEE80211_STA_RX_BW_160:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
/* fall through */
case IEEE80211_STA_RX_BW_80:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
/* fall through */
case IEEE80211_STA_RX_BW_40:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
/* fall through */
case IEEE80211_STA_RX_BW_20:
if (sta->ht_cap.ht_supported)
add_sta_cmd.station_flags |=
cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
break;
}
switch (sta->rx_nss) {
case 1:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
break;
case 2:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
break;
case 3 ... 8:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
break;
}
switch (sta->smps_mode) {
case IEEE80211_SMPS_AUTOMATIC:
case IEEE80211_SMPS_NUM_MODES:
WARN_ON(1);
break;
case IEEE80211_SMPS_STATIC:
/* override NSS */
add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
break;
case IEEE80211_SMPS_DYNAMIC:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
break;
case IEEE80211_SMPS_OFF:
/* nothing */
break;
}
if (sta->ht_cap.ht_supported) {
add_sta_cmd.station_flags_msk |=
cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
STA_FLG_AGG_MPDU_DENS_MSK);
mpdu_dens = sta->ht_cap.ampdu_density;
}
if (sta->vht_cap.vht_supported) {
agg_size = sta->vht_cap.cap &
IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
agg_size >>=
IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
} else if (sta->ht_cap.ht_supported) {
agg_size = sta->ht_cap.ampdu_factor;
}
add_sta_cmd.station_flags |=
cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
add_sta_cmd.station_flags |=
cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
iwl_mvm_add_sta_cmd_size(mvm),
&add_sta_cmd, &status);
if (ret)
return ret;
switch (status & IWL_ADD_STA_STATUS_MASK) {
case ADD_STA_SUCCESS:
IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
break;
default:
ret = -EIO;
IWL_ERR(mvm, "ADD_STA failed\n");
break;
}
return ret;
}
static void iwl_mvm_rx_agg_session_expired(unsigned long data)
{
struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
struct iwl_mvm_baid_data *ba_data;
struct ieee80211_sta *sta;
struct iwl_mvm_sta *mvm_sta;
unsigned long timeout;
rcu_read_lock();
ba_data = rcu_dereference(*rcu_ptr);
if (WARN_ON(!ba_data))
goto unlock;
if (!ba_data->timeout)
goto unlock;
timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
if (time_is_after_jiffies(timeout)) {
mod_timer(&ba_data->session_timer, timeout);
goto unlock;
}
/* Timer expired */
sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
mvm_sta = iwl_mvm_sta_from_mac80211(sta);
ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
sta->addr, ba_data->tid);
unlock:
rcu_read_unlock();
}
static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
struct ieee80211_sta *sta)
{
unsigned long used_hw_queues;
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
unsigned int wdg_timeout =
iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
u32 ac;
lockdep_assert_held(&mvm->mutex);
used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
/* Find available queues, and allocate them to the ACs */
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
u8 queue = find_first_zero_bit(&used_hw_queues,
mvm->first_agg_queue);
if (queue >= mvm->first_agg_queue) {
IWL_ERR(mvm, "Failed to allocate STA queue\n");
return -EBUSY;
}
__set_bit(queue, &used_hw_queues);
mvmsta->hw_queue[ac] = queue;
}
/* Found a place for all queues - enable them */
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
mvmsta->hw_queue[ac],
iwl_mvm_ac_to_tx_fifo[ac], 0,
wdg_timeout);
mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
}
return 0;
}
static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
struct ieee80211_sta *sta)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
unsigned long sta_msk;
int i;
lockdep_assert_held(&mvm->mutex);
/* disable the TDLS STA-specific queues */
sta_msk = mvmsta->tfd_queue_msk;
for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
}
/* Disable aggregations for a bitmap of TIDs for a given station */
static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
unsigned long disable_agg_tids,
bool remove_queue)
{
struct iwl_mvm_add_sta_cmd cmd = {};
struct ieee80211_sta *sta;
struct iwl_mvm_sta *mvmsta;
u32 status;
u8 sta_id;
int ret;
spin_lock_bh(&mvm->queue_info_lock);
sta_id = mvm->queue_info[queue].ra_sta_id;
spin_unlock_bh(&mvm->queue_info_lock);
rcu_read_lock();
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
rcu_read_unlock();
return -EINVAL;
}
mvmsta = iwl_mvm_sta_from_mac80211(sta);
mvmsta->tid_disable_agg |= disable_agg_tids;
cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
cmd.sta_id = mvmsta->sta_id;
cmd.add_modify = STA_MODE_MODIFY;
cmd.modify_mask = STA_MODIFY_QUEUES;
if (disable_agg_tids)
cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
if (remove_queue)
cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
rcu_read_unlock();
/* Notify FW of queue removal from the STA queues */
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
iwl_mvm_add_sta_cmd_size(mvm),
&cmd, &status);
return ret;
}
static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
{
struct ieee80211_sta *sta;
struct iwl_mvm_sta *mvmsta;
unsigned long tid_bitmap;
unsigned long agg_tids = 0;
s8 sta_id;
int tid;
lockdep_assert_held(&mvm->mutex);
spin_lock_bh(&mvm->queue_info_lock);
sta_id = mvm->queue_info[queue].ra_sta_id;
tid_bitmap = mvm->queue_info[queue].tid_bitmap;
spin_unlock_bh(&mvm->queue_info_lock);
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
return -EINVAL;
mvmsta = iwl_mvm_sta_from_mac80211(sta);
spin_lock_bh(&mvmsta->lock);
for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
agg_tids |= BIT(tid);
}
spin_unlock_bh(&mvmsta->lock);
return agg_tids;
}
/*
* Remove a queue from a station's resources.
* Note that this only marks as free. It DOESN'T delete a BA agreement, and
* doesn't disable the queue
*/
static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
{
struct ieee80211_sta *sta;
struct iwl_mvm_sta *mvmsta;
unsigned long tid_bitmap;
unsigned long disable_agg_tids = 0;
u8 sta_id;
int tid;
lockdep_assert_held(&mvm->mutex);
spin_lock_bh(&mvm->queue_info_lock);
sta_id = mvm->queue_info[queue].ra_sta_id;
tid_bitmap = mvm->queue_info[queue].tid_bitmap;
spin_unlock_bh(&mvm->queue_info_lock);
rcu_read_lock();
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
rcu_read_unlock();
return 0;
}
mvmsta = iwl_mvm_sta_from_mac80211(sta);
spin_lock_bh(&mvmsta->lock);
/* Unmap MAC queues and TIDs from this queue */
for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
disable_agg_tids |= BIT(tid);
mvmsta->tid_data[tid].txq_id = IEEE80211_INVAL_HW_QUEUE;
}
mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
spin_unlock_bh(&mvmsta->lock);
rcu_read_unlock();
spin_lock_bh(&mvm->queue_info_lock);
/* Unmap MAC queues and TIDs from this queue */
mvm->queue_info[queue].hw_queue_to_mac80211 = 0;
mvm->queue_info[queue].hw_queue_refcount = 0;
mvm->queue_info[queue].tid_bitmap = 0;
spin_unlock_bh(&mvm->queue_info_lock);
return disable_agg_tids;
}
static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
unsigned long tfd_queue_mask, u8 ac)
{
int queue = 0;
u8 ac_to_queue[IEEE80211_NUM_ACS];
int i;
lockdep_assert_held(&mvm->queue_info_lock);
memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
/* See what ACs the existing queues for this STA have */
for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
/* Only DATA queues can be shared */
if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
continue;
/* Don't try and take queues being reconfigured */
if (mvm->queue_info[queue].status ==
IWL_MVM_QUEUE_RECONFIGURING)
continue;
ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
}
/*
* The queue to share is chosen only from DATA queues as follows (in
* descending priority):
* 1. An AC_BE queue
* 2. Same AC queue
* 3. Highest AC queue that is lower than new AC
* 4. Any existing AC (there always is at least 1 DATA queue)
*/
/* Priority 1: An AC_BE queue */
if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
queue = ac_to_queue[IEEE80211_AC_BE];
/* Priority 2: Same AC queue */
else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
queue = ac_to_queue[ac];
/* Priority 3a: If new AC is VO and VI exists - use VI */
else if (ac == IEEE80211_AC_VO &&
ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
queue = ac_to_queue[IEEE80211_AC_VI];
/* Priority 3b: No BE so only AC less than the new one is BK */
else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
queue = ac_to_queue[IEEE80211_AC_BK];
/* Priority 4a: No BE nor BK - use VI if exists */
else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
queue = ac_to_queue[IEEE80211_AC_VI];
/* Priority 4b: No BE, BK nor VI - use VO if exists */
else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
queue = ac_to_queue[IEEE80211_AC_VO];
/* Make sure queue found (or not) is legal */
if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
!iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
(queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
IWL_ERR(mvm, "No DATA queues available to share\n");
return -ENOSPC;
}
/* Make sure the queue isn't in the middle of being reconfigured */
if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
IWL_ERR(mvm,
"TXQ %d is in the middle of re-config - try again\n",
queue);
return -EBUSY;
}
return queue;
}
/*
* If a given queue has a higher AC than the TID stream that is being compared
* to, the queue needs to be redirected to the lower AC. This function does that
* in such a case, otherwise - if no redirection required - it does nothing,
* unless the %force param is true.
*/
int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
int ac, int ssn, unsigned int wdg_timeout,
bool force)
{
struct iwl_scd_txq_cfg_cmd cmd = {
.scd_queue = queue,
.action = SCD_CFG_DISABLE_QUEUE,
};
bool shared_queue;
unsigned long mq;
int ret;
/*
* If the AC is lower than current one - FIFO needs to be redirected to
* the lowest one of the streams in the queue. Check if this is needed
* here.
* Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
* value 3 and VO with value 0, so to check if ac X is lower than ac Y
* we need to check if the numerical value of X is LARGER than of Y.
*/
spin_lock_bh(&mvm->queue_info_lock);
if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
spin_unlock_bh(&mvm->queue_info_lock);
IWL_DEBUG_TX_QUEUES(mvm,
"No redirection needed on TXQ #%d\n",
queue);
return 0;
}
cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
cmd.tid = mvm->queue_info[queue].txq_tid;
mq = mvm->queue_info[queue].hw_queue_to_mac80211;
shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
spin_unlock_bh(&mvm->queue_info_lock);
IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
queue, iwl_mvm_ac_to_tx_fifo[ac]);
/* Stop MAC queues and wait for this queue to empty */
iwl_mvm_stop_mac_queues(mvm, mq);
ret = iwl_trans_wait_tx_queue_empty(mvm->trans, BIT(queue));
if (ret) {
IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
queue);
ret = -EIO;
goto out;
}
/* Before redirecting the queue we need to de-activate it */
iwl_trans_txq_disable(mvm->trans, queue, false);
ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
if (ret)
IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
ret);
/* Make sure the SCD wrptr is correctly set before reconfiguring */
iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
/* Update the TID "owner" of the queue */
spin_lock_bh(&mvm->queue_info_lock);
mvm->queue_info[queue].txq_tid = tid;
spin_unlock_bh(&mvm->queue_info_lock);
/* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
/* Redirect to lower AC */
iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
ssn);
/* Update AC marking of the queue */
spin_lock_bh(&mvm->queue_info_lock);
mvm->queue_info[queue].mac80211_ac = ac;
spin_unlock_bh(&mvm->queue_info_lock);
/*
* Mark queue as shared in transport if shared
* Note this has to be done after queue enablement because enablement
* can also set this value, and there is no indication there to shared
* queues
*/
if (shared_queue)
iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
out:
/* Continue using the MAC queues */
iwl_mvm_start_mac_queues(mvm, mq);
return ret;
}
static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
struct ieee80211_sta *sta, u8 ac, int tid,
struct ieee80211_hdr *hdr)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_trans_txq_scd_cfg cfg = {
.fifo = iwl_mvm_ac_to_tx_fifo[ac],
.sta_id = mvmsta->sta_id,
.tid = tid,
.frame_limit = IWL_FRAME_LIMIT,
};
unsigned int wdg_timeout =
iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
u8 mac_queue = mvmsta->vif->hw_queue[ac];
int queue = -1;
bool using_inactive_queue = false;
unsigned long disable_agg_tids = 0;
enum iwl_mvm_agg_state queue_state;
bool shared_queue = false;
int ssn;
unsigned long tfd_queue_mask;
int ret;
lockdep_assert_held(&mvm->mutex);
spin_lock_bh(&mvmsta->lock);
tfd_queue_mask = mvmsta->tfd_queue_msk;
spin_unlock_bh(&mvmsta->lock);
spin_lock_bh(&mvm->queue_info_lock);
/*
* Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
* exists
*/
if (!ieee80211_is_data_qos(hdr->frame_control) ||
ieee80211_is_qos_nullfunc(hdr->frame_control)) {
queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
IWL_MVM_DQA_MIN_MGMT_QUEUE,
IWL_MVM_DQA_MAX_MGMT_QUEUE);
if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
queue);
/* If no such queue is found, we'll use a DATA queue instead */
}
if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
(mvm->queue_info[mvmsta->reserved_queue].status ==
IWL_MVM_QUEUE_RESERVED ||
mvm->queue_info[mvmsta->reserved_queue].status ==
IWL_MVM_QUEUE_INACTIVE)) {
queue = mvmsta->reserved_queue;
mvm->queue_info[queue].reserved = true;
IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
}
if (queue < 0)
queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
IWL_MVM_DQA_MIN_DATA_QUEUE,
IWL_MVM_DQA_MAX_DATA_QUEUE);
/*
* Check if this queue is already allocated but inactive.
* In such a case, we'll need to first free this queue before enabling
* it again, so we'll mark it as reserved to make sure no new traffic
* arrives on it
*/
if (queue > 0 &&
mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
using_inactive_queue = true;
IWL_DEBUG_TX_QUEUES(mvm,
"Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
queue, mvmsta->sta_id, tid);
}
/* No free queue - we'll have to share */
if (queue <= 0) {
queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
if (queue > 0) {
shared_queue = true;
mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
}
}
/*
* Mark TXQ as ready, even though it hasn't been fully configured yet,
* to make sure no one else takes it.
* This will allow avoiding re-acquiring the lock at the end of the
* configuration. On error we'll mark it back as free.
*/
if ((queue > 0) && !shared_queue)
mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
spin_unlock_bh(&mvm->queue_info_lock);
/* This shouldn't happen - out of queues */
if (WARN_ON(queue <= 0)) {
IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
tid, cfg.sta_id);
return queue;
}
/*
* Actual en/disablement of aggregations is through the ADD_STA HCMD,
* but for configuring the SCD to send A-MPDUs we need to mark the queue
* as aggregatable.
* Mark all DATA queues as allowing to be aggregated at some point
*/
cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
/*
* If this queue was previously inactive (idle) - we need to free it
* first
*/
if (using_inactive_queue) {
struct iwl_scd_txq_cfg_cmd cmd = {
.scd_queue = queue,
.action = SCD_CFG_DISABLE_QUEUE,
};
u8 txq_curr_ac;
disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
spin_lock_bh(&mvm->queue_info_lock);
txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[txq_curr_ac];
cmd.tid = mvm->queue_info[queue].txq_tid;
spin_unlock_bh(&mvm->queue_info_lock);
/* Disable the queue */
if (disable_agg_tids)
iwl_mvm_invalidate_sta_queue(mvm, queue,
disable_agg_tids, false);
iwl_trans_txq_disable(mvm->trans, queue, false);
ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd),
&cmd);
if (ret) {
IWL_ERR(mvm,
"Failed to free inactive queue %d (ret=%d)\n",
queue, ret);
/* Re-mark the inactive queue as inactive */
spin_lock_bh(&mvm->queue_info_lock);
mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
spin_unlock_bh(&mvm->queue_info_lock);
return ret;
}
/* If TXQ is allocated to another STA, update removal in FW */
if (cmd.sta_id != mvmsta->sta_id)
iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
}
IWL_DEBUG_TX_QUEUES(mvm,
"Allocating %squeue #%d to sta %d on tid %d\n",
shared_queue ? "shared " : "", queue,
mvmsta->sta_id, tid);
if (shared_queue) {
/* Disable any open aggs on this queue */
disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
if (disable_agg_tids) {
IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
queue);
iwl_mvm_invalidate_sta_queue(mvm, queue,
disable_agg_tids, false);
}
}
ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
wdg_timeout);
/*
* Mark queue as shared in transport if shared
* Note this has to be done after queue enablement because enablement
* can also set this value, and there is no indication there to shared
* queues
*/
if (shared_queue)
iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
spin_lock_bh(&mvmsta->lock);
mvmsta->tid_data[tid].txq_id = queue;
mvmsta->tid_data[tid].is_tid_active = true;
mvmsta->tfd_queue_msk |= BIT(queue);
queue_state = mvmsta->tid_data[tid].state;
if (mvmsta->reserved_queue == queue)
mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
spin_unlock_bh(&mvmsta->lock);
if (!shared_queue) {
ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
if (ret)
goto out_err;
/* If we need to re-enable aggregations... */
if (queue_state == IWL_AGG_ON) {
ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
if (ret)
goto out_err;
}
} else {
/* Redirect queue, if needed */
ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
wdg_timeout, false);
if (ret)
goto out_err;
}
return 0;
out_err:
iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
return ret;
}
static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
{
struct iwl_scd_txq_cfg_cmd cmd = {
.scd_queue = queue,
.action = SCD_CFG_UPDATE_QUEUE_TID,
};
s8 sta_id;
int tid;
unsigned long tid_bitmap;
int ret;
lockdep_assert_held(&mvm->mutex);
spin_lock_bh(&mvm->queue_info_lock);
sta_id = mvm->queue_info[queue].ra_sta_id;
tid_bitmap = mvm->queue_info[queue].tid_bitmap;
spin_unlock_bh(&mvm->queue_info_lock);
if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
return;
/* Find any TID for queue */
tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
cmd.tid = tid;
cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
if (ret)
IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
queue, ret);
else
IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
queue, tid);
}
static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
{
struct ieee80211_sta *sta;
struct iwl_mvm_sta *mvmsta;
s8 sta_id;
int tid = -1;
unsigned long tid_bitmap;
unsigned int wdg_timeout;
int ssn;
int ret = true;
lockdep_assert_held(&mvm->mutex);
spin_lock_bh(&mvm->queue_info_lock);
sta_id = mvm->queue_info[queue].ra_sta_id;
tid_bitmap = mvm->queue_info[queue].tid_bitmap;
spin_unlock_bh(&mvm->queue_info_lock);
/* Find TID for queue, and make sure it is the only one on the queue */
tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
if (tid_bitmap != BIT(tid)) {
IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
queue, tid_bitmap);
return;
}
IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
tid);
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
return;
mvmsta = iwl_mvm_sta_from_mac80211(sta);
wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
tid_to_mac80211_ac[tid], ssn,
wdg_timeout, true);
if (ret) {
IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
return;
}
/* If aggs should be turned back on - do it */
if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
struct iwl_mvm_add_sta_cmd cmd = {0};
mvmsta->tid_disable_agg &= ~BIT(tid);
cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
cmd.sta_id = mvmsta->sta_id;
cmd.add_modify = STA_MODE_MODIFY;
cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
iwl_mvm_add_sta_cmd_size(mvm), &cmd);
if (!ret) {
IWL_DEBUG_TX_QUEUES(mvm,
"TXQ #%d is now aggregated again\n",
queue);
/* Mark queue intenally as aggregating again */
iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
}
}
spin_lock_bh(&mvm->queue_info_lock);
mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
spin_unlock_bh(&mvm->queue_info_lock);
}
static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
{
if (tid == IWL_MAX_TID_COUNT)
return IEEE80211_AC_VO; /* MGMT */
return tid_to_mac80211_ac[tid];
}
static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
struct ieee80211_sta *sta, int tid)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
struct sk_buff *skb;
struct ieee80211_hdr *hdr;
struct sk_buff_head deferred_tx;
u8 mac_queue;
bool no_queue = false; /* Marks if there is a problem with the queue */
u8 ac;
lockdep_assert_held(&mvm->mutex);
skb = skb_peek(&tid_data->deferred_tx_frames);
if (!skb)
return;
hdr = (void *)skb->data;
ac = iwl_mvm_tid_to_ac_queue(tid);
mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE &&
iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
IWL_ERR(mvm,
"Can't alloc TXQ for sta %d tid %d - dropping frame\n",
mvmsta->sta_id, tid);
/*
* Mark queue as problematic so later the deferred traffic is
* freed, as we can do nothing with it
*/
no_queue = true;
}
__skb_queue_head_init(&deferred_tx);
/* Disable bottom-halves when entering TX path */
local_bh_disable();
spin_lock(&mvmsta->lock);
skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
spin_unlock(&mvmsta->lock);
while ((skb = __skb_dequeue(&deferred_tx)))
if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
ieee80211_free_txskb(mvm->hw, skb);
local_bh_enable();
/* Wake queue */
iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
}
void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
{
struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
add_stream_wk);
struct ieee80211_sta *sta;
struct iwl_mvm_sta *mvmsta;
unsigned long deferred_tid_traffic;
int queue, sta_id, tid;
/* Check inactivity of queues */
iwl_mvm_inactivity_check(mvm);
mutex_lock(&mvm->mutex);
/* Reconfigure queues requiring reconfiguation */
for (queue = 0; queue < IWL_MAX_HW_QUEUES; queue++) {
bool reconfig;
bool change_owner;
spin_lock_bh(&mvm->queue_info_lock);
reconfig = (mvm->queue_info[queue].status ==
IWL_MVM_QUEUE_RECONFIGURING);
/*
* We need to take into account a situation in which a TXQ was
* allocated to TID x, and then turned shared by adding TIDs y
* and z. If TID x becomes inactive and is removed from the TXQ,
* ownership must be given to one of the remaining TIDs.
* This is mainly because if TID x continues - a new queue can't
* be allocated for it as long as it is an owner of another TXQ.
*/
change_owner = !(mvm->queue_info[queue].tid_bitmap &
BIT(mvm->queue_info[queue].txq_tid)) &&
(mvm->queue_info[queue].status ==
IWL_MVM_QUEUE_SHARED);
spin_unlock_bh(&mvm->queue_info_lock);
if (reconfig)
iwl_mvm_unshare_queue(mvm, queue);
else if (change_owner)
iwl_mvm_change_queue_owner(mvm, queue);
}
/* Go over all stations with deferred traffic */
for_each_set_bit(sta_id, mvm->sta_deferred_frames,
IWL_MVM_STATION_COUNT) {
clear_bit(sta_id, mvm->sta_deferred_frames);
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
if (IS_ERR_OR_NULL(sta))
continue;
mvmsta = iwl_mvm_sta_from_mac80211(sta);
deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
for_each_set_bit(tid, &deferred_tid_traffic,
IWL_MAX_TID_COUNT + 1)
iwl_mvm_tx_deferred_stream(mvm, sta, tid);
}
mutex_unlock(&mvm->mutex);
}
static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
struct ieee80211_sta *sta,
enum nl80211_iftype vif_type)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
int queue;
/*
* Check for inactive queues, so we don't reach a situation where we
* can't add a STA due to a shortage in queues that doesn't really exist
*/
iwl_mvm_inactivity_check(mvm);
spin_lock_bh(&mvm->queue_info_lock);
/* Make sure we have free resources for this STA */
if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
!mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
(mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
IWL_MVM_QUEUE_FREE))
queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
else
queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
IWL_MVM_DQA_MIN_DATA_QUEUE,
IWL_MVM_DQA_MAX_DATA_QUEUE);
if (queue < 0) {
spin_unlock_bh(&mvm->queue_info_lock);
IWL_ERR(mvm, "No available queues for new station\n");
return -ENOSPC;
}
mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
spin_unlock_bh(&mvm->queue_info_lock);
mvmsta->reserved_queue = queue;
IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
queue, mvmsta->sta_id);
return 0;
}
/*
* In DQA mode, after a HW restart the queues should be allocated as before, in
* order to avoid race conditions when there are shared queues. This function
* does the re-mapping and queue allocation.
*
* Note that re-enabling aggregations isn't done in this function.
*/
static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
struct iwl_mvm_sta *mvm_sta)
{
unsigned int wdg_timeout =
iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
int i;
struct iwl_trans_txq_scd_cfg cfg = {
.sta_id = mvm_sta->sta_id,
.frame_limit = IWL_FRAME_LIMIT,
};
/* Make sure reserved queue is still marked as such (if allocated) */
if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
mvm->queue_info[mvm_sta->reserved_queue].status =
IWL_MVM_QUEUE_RESERVED;
for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
int txq_id = tid_data->txq_id;
int ac;
u8 mac_queue;
if (txq_id == IEEE80211_INVAL_HW_QUEUE)
continue;
skb_queue_head_init(&tid_data->deferred_tx_frames);
ac = tid_to_mac80211_ac[i];
mac_queue = mvm_sta->vif->hw_queue[ac];
cfg.tid = i;
cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac];
cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
txq_id == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
IWL_DEBUG_TX_QUEUES(mvm,
"Re-mapping sta %d tid %d to queue %d\n",
mvm_sta->sta_id, i, txq_id);
iwl_mvm_enable_txq(mvm, txq_id, mac_queue,
IEEE80211_SEQ_TO_SN(tid_data->seq_number),
&cfg, wdg_timeout);
mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
}
atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0);
}
int iwl_mvm_add_sta(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_rxq_dup_data *dup_data;
int i, ret, sta_id;
lockdep_assert_held(&mvm->mutex);
if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
sta_id = iwl_mvm_find_free_sta_id(mvm,
ieee80211_vif_type_p2p(vif));
else
sta_id = mvm_sta->sta_id;
if (sta_id == IWL_MVM_STATION_COUNT)
return -ENOSPC;
spin_lock_init(&mvm_sta->lock);
/* In DQA mode, if this is a HW restart, re-alloc existing queues */
if (iwl_mvm_is_dqa_supported(mvm) &&
test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
goto update_fw;
}
mvm_sta->sta_id = sta_id;
mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
mvmvif->color);
mvm_sta->vif = vif;
mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
mvm_sta->tx_protection = 0;
mvm_sta->tt_tx_protection = false;
/* HW restart, don't assume the memory has been zeroed */
atomic_set(&mvm->pending_frames[sta_id], 0);
mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
mvm_sta->tfd_queue_msk = 0;
/*
* Allocate new queues for a TDLS station, unless we're in DQA mode,
* and then they'll be allocated dynamically
*/
if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) {
ret = iwl_mvm_tdls_sta_init(mvm, sta);
if (ret)
return ret;
} else if (!iwl_mvm_is_dqa_supported(mvm)) {
for (i = 0; i < IEEE80211_NUM_ACS; i++)
if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
}
/* for HW restart - reset everything but the sequence number */
for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
u16 seq = mvm_sta->tid_data[i].seq_number;
memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
mvm_sta->tid_data[i].seq_number = seq;
if (!iwl_mvm_is_dqa_supported(mvm))
continue;
/*
* Mark all queues for this STA as unallocated and defer TX
* frames until the queue is allocated
*/
mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
}
mvm_sta->deferred_traffic_tid_map = 0;
mvm_sta->agg_tids = 0;
if (iwl_mvm_has_new_rx_api(mvm) &&
!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
dup_data = kcalloc(mvm->trans->num_rx_queues,
sizeof(*dup_data),
GFP_KERNEL);
if (!dup_data)
return -ENOMEM;
mvm_sta->dup_data = dup_data;
}
if (iwl_mvm_is_dqa_supported(mvm)) {
ret = iwl_mvm_reserve_sta_stream(mvm, sta,
ieee80211_vif_type_p2p(vif));
if (ret)
goto err;
}
update_fw:
ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
if (ret)
goto err;
if (vif->type == NL80211_IFTYPE_STATION) {
if (!sta->tdls) {
WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
mvmvif->ap_sta_id = sta_id;
} else {
WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
}
}
rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
return 0;
err:
if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
iwl_mvm_tdls_sta_deinit(mvm, sta);
return ret;
}
int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
bool drain)
{
struct iwl_mvm_add_sta_cmd cmd = {};
int ret;
u32 status;
lockdep_assert_held(&mvm->mutex);
cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
cmd.sta_id = mvmsta->sta_id;
cmd.add_modify = STA_MODE_MODIFY;
cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
iwl_mvm_add_sta_cmd_size(mvm),
&cmd, &status);
if (ret)
return ret;
switch (status & IWL_ADD_STA_STATUS_MASK) {
case ADD_STA_SUCCESS:
IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
mvmsta->sta_id);
break;
default:
ret = -EIO;
IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
mvmsta->sta_id);
break;
}
return ret;
}
/*
* Remove a station from the FW table. Before sending the command to remove
* the station validate that the station is indeed known to the driver (sanity
* only).
*/
static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
{
struct ieee80211_sta *sta;
struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
.sta_id = sta_id,
};
int ret;
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
/* Note: internal stations are marked as error values */
if (!sta) {
IWL_ERR(mvm, "Invalid station id\n");
return -EINVAL;
}
ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
sizeof(rm_sta_cmd), &rm_sta_cmd);
if (ret) {
IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
return ret;
}
return 0;
}
void iwl_mvm_sta_drained_wk(struct work_struct *wk)
{
struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
u8 sta_id;
/*
* The mutex is needed because of the SYNC cmd, but not only: if the
* work would run concurrently with iwl_mvm_rm_sta, it would run before
* iwl_mvm_rm_sta sets the station as busy, and exit. Then
* iwl_mvm_rm_sta would set the station as busy, and nobody will clean
* that later.
*/
mutex_lock(&mvm->mutex);
for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
int ret;
struct ieee80211_sta *sta =
rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
/*
* This station is in use or RCU-removed; the latter happens in
* managed mode, where mac80211 removes the station before we
* can remove it from firmware (we can only do that after the
* MAC is marked unassociated), and possibly while the deauth
* frame to disconnect from the AP is still queued. Then, the
* station pointer is -ENOENT when the last skb is reclaimed.
*/
if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
continue;
if (PTR_ERR(sta) == -EINVAL) {
IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
sta_id);
continue;
}
if (!sta) {
IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
sta_id);
continue;
}
WARN_ON(PTR_ERR(sta) != -EBUSY);
/* This station was removed and we waited until it got drained,
* we can now proceed and remove it.
*/
ret = iwl_mvm_rm_sta_common(mvm, sta_id);
if (ret) {
IWL_ERR(mvm,
"Couldn't remove sta %d after it was drained\n",
sta_id);
continue;
}
RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
clear_bit(sta_id, mvm->sta_drained);
if (mvm->tfd_drained[sta_id]) {
unsigned long i, msk = mvm->tfd_drained[sta_id];
for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
iwl_mvm_disable_txq(mvm, i, i,
IWL_MAX_TID_COUNT, 0);
mvm->tfd_drained[sta_id] = 0;
IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
sta_id, msk);
}
}
mutex_unlock(&mvm->mutex);
}
static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct iwl_mvm_sta *mvm_sta)
{
int ac;
int i;
lockdep_assert_held(&mvm->mutex);
for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE)
continue;
ac = iwl_mvm_tid_to_ac_queue(i);
iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
vif->hw_queue[ac], i, 0);
mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
}
}
int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
u8 sta_id = mvm_sta->sta_id;
int ret;
lockdep_assert_held(&mvm->mutex);
if (iwl_mvm_has_new_rx_api(mvm))
kfree(mvm_sta->dup_data);
if ((vif->type == NL80211_IFTYPE_STATION &&
mvmvif->ap_sta_id == sta_id) ||
iwl_mvm_is_dqa_supported(mvm)){
ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
if (ret)
return ret;
/* flush its queues here since we are freeing mvm_sta */
ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
if (ret)
return ret;
ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
mvm_sta->tfd_queue_msk);
if (ret)
return ret;
ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
/* If DQA is supported - the queues can be disabled now */
if (iwl_mvm_is_dqa_supported(mvm)) {
u8 reserved_txq = mvm_sta->reserved_queue;
enum iwl_mvm_queue_status *status;
iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
/*
* If pending_frames is set at this point - it must be
* driver internal logic error, since queues are empty
* and removed successuly.
* warn on it but set it to 0 anyway to avoid station
* not being removed later in the function
*/
WARN_ON(atomic_xchg(&mvm->pending_frames[sta_id], 0));
/*
* If no traffic has gone through the reserved TXQ - it
* is still marked as IWL_MVM_QUEUE_RESERVED, and
* should be manually marked as free again
*/
spin_lock_bh(&mvm->queue_info_lock);
status = &mvm->queue_info[reserved_txq].status;
if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
(*status != IWL_MVM_QUEUE_FREE),
"sta_id %d reserved txq %d status %d",
sta_id, reserved_txq, *status)) {
spin_unlock_bh(&mvm->queue_info_lock);
return -EINVAL;
}
*status = IWL_MVM_QUEUE_FREE;
spin_unlock_bh(&mvm->queue_info_lock);
}
if (vif->type == NL80211_IFTYPE_STATION &&
mvmvif->ap_sta_id == sta_id) {
/* if associated - we can't remove the AP STA now */
if (vif->bss_conf.assoc)
return ret;
/* unassoc - go ahead - remove the AP STA now */
mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
/* clear d0i3_ap_sta_id if no longer relevant */
if (mvm->d0i3_ap_sta_id == sta_id)
mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
}
}
/*
* This shouldn't happen - the TDLS channel switch should be canceled
* before the STA is removed.
*/
if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
cancel_delayed_work(&mvm->tdls_cs.dwork);
}
/*
* Make sure that the tx response code sees the station as -EBUSY and
* calls the drain worker.
*/
spin_lock_bh(&mvm_sta->lock);
/*
* There are frames pending on the AC queues for this station.
* We need to wait until all the frames are drained...
*/
if (atomic_read(&mvm->pending_frames[sta_id])) {
rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id],
ERR_PTR(-EBUSY));
spin_unlock_bh(&mvm_sta->lock);
/* disable TDLS sta queues on drain complete */
if (sta->tdls) {
mvm->tfd_drained[sta_id] = mvm_sta->tfd_queue_msk;
IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", sta_id);
}
ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
} else {
spin_unlock_bh(&mvm_sta->lock);
if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
iwl_mvm_tdls_sta_deinit(mvm, sta);
ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
}
return ret;
}
int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
u8 sta_id)
{
int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
lockdep_assert_held(&mvm->mutex);
RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
return ret;
}
int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
struct iwl_mvm_int_sta *sta,
u32 qmask, enum nl80211_iftype iftype)
{
if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
return -ENOSPC;
}
sta->tfd_queue_msk = qmask;
/* put a non-NULL value so iterating over the stations won't stop */
rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
return 0;
}
static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
struct iwl_mvm_int_sta *sta)
{
RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
sta->sta_id = IWL_MVM_STATION_COUNT;
}
static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
struct iwl_mvm_int_sta *sta,
const u8 *addr,
u16 mac_id, u16 color)
{
struct iwl_mvm_add_sta_cmd cmd;
int ret;
u32 status;
lockdep_assert_held(&mvm->mutex);
memset(&cmd, 0, sizeof(cmd));
cmd.sta_id = sta->sta_id;
cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
color));
cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
cmd.tid_disable_tx = cpu_to_le16(0xffff);
if (addr)
memcpy(cmd.addr, addr, ETH_ALEN);
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
iwl_mvm_add_sta_cmd_size(mvm),
&cmd, &status);
if (ret)
return ret;
switch (status & IWL_ADD_STA_STATUS_MASK) {
case ADD_STA_SUCCESS:
IWL_DEBUG_INFO(mvm, "Internal station added.\n");
return 0;
default:
ret = -EIO;
IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
status);
break;
}
return ret;
}
int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
{
unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
mvm->cfg->base_params->wd_timeout :
IWL_WATCHDOG_DISABLED;
int ret;
lockdep_assert_held(&mvm->mutex);
/* Map Aux queue to fifo - needs to happen before adding Aux station */
if (!iwl_mvm_is_dqa_supported(mvm))
iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
/* Allocate aux station and assign to it the aux queue */
ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
NL80211_IFTYPE_UNSPECIFIED);
if (ret)
return ret;
if (iwl_mvm_is_dqa_supported(mvm)) {
struct iwl_trans_txq_scd_cfg cfg = {
.fifo = IWL_MVM_TX_FIFO_MCAST,
.sta_id = mvm->aux_sta.sta_id,
.tid = IWL_MAX_TID_COUNT,
.aggregate = false,
.frame_limit = IWL_FRAME_LIMIT,
};
iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
wdg_timeout);
}
ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
MAC_INDEX_AUX, 0);
if (ret)
iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
return ret;
}
int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
lockdep_assert_held(&mvm->mutex);
return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
mvmvif->id, 0);
}
int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
int ret;
lockdep_assert_held(&mvm->mutex);
ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
if (ret)
IWL_WARN(mvm, "Failed sending remove station\n");
return ret;
}
void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
{
iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
}
void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
{
lockdep_assert_held(&mvm->mutex);
iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
}
/*
* Send the add station command for the vif's broadcast station.
* Assumes that the station was already allocated.
*
* @mvm: the mvm component
* @vif: the interface to which the broadcast station is added
* @bsta: the broadcast station to add.
*/
int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
const u8 *baddr = _baddr;
lockdep_assert_held(&mvm->mutex);
if (iwl_mvm_is_dqa_supported(mvm)) {
struct iwl_trans_txq_scd_cfg cfg = {
.fifo = IWL_MVM_TX_FIFO_VO,
.sta_id = mvmvif->bcast_sta.sta_id,
.tid = IWL_MAX_TID_COUNT,
.aggregate = false,
.frame_limit = IWL_FRAME_LIMIT,
};
unsigned int wdg_timeout =
iwl_mvm_get_wd_timeout(mvm, vif, false, false);
int queue;
if ((vif->type == NL80211_IFTYPE_AP) &&
(mvmvif->bcast_sta.tfd_queue_msk &
BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)))
queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) &&
(mvmvif->bcast_sta.tfd_queue_msk &
BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)))
queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE;
else if (WARN(1, "Missed required TXQ for adding bcast STA\n"))
return -EINVAL;
iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
wdg_timeout);
}
if (vif->type == NL80211_IFTYPE_ADHOC)
baddr = vif->bss_conf.bssid;
if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
return -ENOSPC;
return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
mvmvif->id, mvmvif->color);
}
/* Send the FW a request to remove the station from it's internal data
* structures, but DO NOT remove the entry from the local data structures. */
int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
int ret;
lockdep_assert_held(&mvm->mutex);
ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
if (ret)
IWL_WARN(mvm, "Failed sending remove station\n");
return ret;
}
int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
u32 qmask = 0;
lockdep_assert_held(&mvm->mutex);
if (!iwl_mvm_is_dqa_supported(mvm))
qmask = iwl_mvm_mac_get_queues_mask(vif);
if (vif->type == NL80211_IFTYPE_AP) {
/*
* The firmware defines the TFD queue mask to only be relevant
* for *unicast* queues, so the multicast (CAB) queue shouldn't
* be included.
*/
qmask &= ~BIT(vif->cab_queue);
if (iwl_mvm_is_dqa_supported(mvm))
qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
} else if (iwl_mvm_is_dqa_supported(mvm) &&
vif->type == NL80211_IFTYPE_P2P_DEVICE) {
qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
}
return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
ieee80211_vif_type_p2p(vif));
}
/* Allocate a new station entry for the broadcast station to the given vif,
* and send it to the FW.
* Note that each P2P mac should have its own broadcast station.
*
* @mvm: the mvm component
* @vif: the interface to which the broadcast station is added
* @bsta: the broadcast station to add. */
int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
int ret;
lockdep_assert_held(&mvm->mutex);
ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
if (ret)
return ret;
ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
if (ret)
iwl_mvm_dealloc_int_sta(mvm, bsta);
return ret;
}
void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
}
/*
* Send the FW a request to remove the station from it's internal data
* structures, and in addition remove it from the local data structure.
*/
int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
int ret;
lockdep_assert_held(&mvm->mutex);
ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
iwl_mvm_dealloc_bcast_sta(mvm, vif);
return ret;
}
#define IWL_MAX_RX_BA_SESSIONS 16
static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
{
struct iwl_mvm_delba_notif notif = {
.metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
.metadata.sync = 1,
.delba.baid = baid,
};
iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
};
static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
struct iwl_mvm_baid_data *data)
{
int i;
iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
for (i = 0; i < mvm->trans->num_rx_queues; i++) {
int j;
struct iwl_mvm_reorder_buffer *reorder_buf =
&data->reorder_buf[i];
spin_lock_bh(&reorder_buf->lock);
if (likely(!reorder_buf->num_stored)) {
spin_unlock_bh(&reorder_buf->lock);
continue;
}
/*
* This shouldn't happen in regular DELBA since the internal
* delBA notification should trigger a release of all frames in
* the reorder buffer.
*/
WARN_ON(1);
for (j = 0; j < reorder_buf->buf_size; j++)
__skb_queue_purge(&reorder_buf->entries[j]);
/*
* Prevent timer re-arm. This prevents a very far fetched case
* where we timed out on the notification. There may be prior
* RX frames pending in the RX queue before the notification
* that might get processed between now and the actual deletion
* and we would re-arm the timer although we are deleting the
* reorder buffer.
*/
reorder_buf->removed = true;
spin_unlock_bh(&reorder_buf->lock);
del_timer_sync(&reorder_buf->reorder_timer);
}
}
static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
u32 sta_id,
struct iwl_mvm_baid_data *data,
u16 ssn, u8 buf_size)
{
int i;
for (i = 0; i < mvm->trans->num_rx_queues; i++) {
struct iwl_mvm_reorder_buffer *reorder_buf =
&data->reorder_buf[i];
int j;
reorder_buf->num_stored = 0;
reorder_buf->head_sn = ssn;
reorder_buf->buf_size = buf_size;
/* rx reorder timer */
reorder_buf->reorder_timer.function =
iwl_mvm_reorder_timer_expired;
reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
init_timer(&reorder_buf->reorder_timer);
spin_lock_init(&reorder_buf->lock);
reorder_buf->mvm = mvm;
reorder_buf->queue = i;
reorder_buf->sta_id = sta_id;
for (j = 0; j < reorder_buf->buf_size; j++)
__skb_queue_head_init(&reorder_buf->entries[j]);
}
}
int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
{
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_add_sta_cmd cmd = {};
struct iwl_mvm_baid_data *baid_data = NULL;
int ret;
u32 status;
lockdep_assert_held(&mvm->mutex);
if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
return -ENOSPC;
}
if (iwl_mvm_has_new_rx_api(mvm) && start) {
/*
* Allocate here so if allocation fails we can bail out early
* before starting the BA session in the firmware
*/
baid_data = kzalloc(sizeof(*baid_data) +
mvm->trans->num_rx_queues *
sizeof(baid_data->reorder_buf[0]),
GFP_KERNEL);
if (!baid_data)
return -ENOMEM;
}
cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
cmd.sta_id = mvm_sta->sta_id;
cmd.add_modify = STA_MODE_MODIFY;
if (start) {
cmd.add_immediate_ba_tid = (u8) tid;
cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
} else {
cmd.remove_immediate_ba_tid = (u8) tid;
}
cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
STA_MODIFY_REMOVE_BA_TID;
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
iwl_mvm_add_sta_cmd_size(mvm),
&cmd, &status);
if (ret)
goto out_free;
switch (status & IWL_ADD_STA_STATUS_MASK) {
case ADD_STA_SUCCESS:
IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
start ? "start" : "stopp");
break;
case ADD_STA_IMMEDIATE_BA_FAILURE:
IWL_WARN(mvm, "RX BA Session refused by fw\n");
ret = -ENOSPC;
break;
default:
ret = -EIO;
IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
start ? "start" : "stopp", status);
break;
}
if (ret)
goto out_free;
if (start) {
u8 baid;
mvm->rx_ba_sessions++;
if (!iwl_mvm_has_new_rx_api(mvm))
return 0;
if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
ret = -EINVAL;
goto out_free;
}
baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
IWL_ADD_STA_BAID_SHIFT);
baid_data->baid = baid;
baid_data->timeout = timeout;
baid_data->last_rx = jiffies;
setup_timer(&baid_data->session_timer,
iwl_mvm_rx_agg_session_expired,
(unsigned long)&mvm->baid_map[baid]);
baid_data->mvm = mvm;
baid_data->tid = tid;
baid_data->sta_id = mvm_sta->sta_id;
mvm_sta->tid_to_baid[tid] = baid;
if (timeout)
mod_timer(&baid_data->session_timer,
TU_TO_EXP_TIME(timeout * 2));
iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
baid_data, ssn, buf_size);
/*
* protect the BA data with RCU to cover a case where our
* internal RX sync mechanism will timeout (not that it's
* supposed to happen) and we will free the session data while
* RX is being processed in parallel
*/
IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
mvm_sta->sta_id, tid, baid);
WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
rcu_assign_pointer(mvm->baid_map[baid], baid_data);
} else {
u8 baid = mvm_sta->tid_to_baid[tid];
if (mvm->rx_ba_sessions > 0)
/* check that restart flow didn't zero the counter */
mvm->rx_ba_sessions--;
if (!iwl_mvm_has_new_rx_api(mvm))
return 0;
if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
return -EINVAL;
baid_data = rcu_access_pointer(mvm->baid_map[baid]);
if (WARN_ON(!baid_data))
return -EINVAL;
/* synchronize all rx queues so we can safely delete */
iwl_mvm_free_reorder(mvm, baid_data);
del_timer_sync(&baid_data->session_timer);
RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
kfree_rcu(baid_data, rcu_head);
IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
}
return 0;
out_free:
kfree(baid_data);
return ret;
}
int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
int tid, u8 queue, bool start)
{
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_add_sta_cmd cmd = {};
int ret;
u32 status;
lockdep_assert_held(&mvm->mutex);
if (start) {
mvm_sta->tfd_queue_msk |= BIT(queue);
mvm_sta->tid_disable_agg &= ~BIT(tid);
} else {
/* In DQA-mode the queue isn't removed on agg termination */
if (!iwl_mvm_is_dqa_supported(mvm))
mvm_sta->tfd_queue_msk &= ~BIT(queue);
mvm_sta->tid_disable_agg |= BIT(tid);
}
cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
cmd.sta_id = mvm_sta->sta_id;
cmd.add_modify = STA_MODE_MODIFY;
cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
iwl_mvm_add_sta_cmd_size(mvm),
&cmd, &status);
if (ret)
return ret;
switch (status & IWL_ADD_STA_STATUS_MASK) {
case ADD_STA_SUCCESS:
break;
default:
ret = -EIO;
IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
start ? "start" : "stopp", status);
break;
}
return ret;
}
const u8 tid_to_mac80211_ac[] = {
IEEE80211_AC_BE,
IEEE80211_AC_BK,
IEEE80211_AC_BK,
IEEE80211_AC_BE,
IEEE80211_AC_VI,
IEEE80211_AC_VI,
IEEE80211_AC_VO,
IEEE80211_AC_VO,
IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
};
static const u8 tid_to_ucode_ac[] = {
AC_BE,
AC_BK,
AC_BK,
AC_BE,
AC_VI,
AC_VI,
AC_VO,
AC_VO,
};
int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data *tid_data;
int txq_id;
int ret;
if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
return -EINVAL;
if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
mvmsta->tid_data[tid].state);
return -ENXIO;
}
lockdep_assert_held(&mvm->mutex);
spin_lock_bh(&mvmsta->lock);
/* possible race condition - we entered D0i3 while starting agg */
if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
spin_unlock_bh(&mvmsta->lock);
IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
return -EIO;
}
spin_lock(&mvm->queue_info_lock);
/*
* Note the possible cases:
* 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
* 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
* one and mark it as reserved
* 3. In DQA mode, but no traffic yet on this TID: same treatment as in
* non-DQA mode, since the TXQ hasn't yet been allocated
*/
txq_id = mvmsta->tid_data[tid].txq_id;
if (iwl_mvm_is_dqa_supported(mvm) &&
unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED)) {
ret = -ENXIO;
IWL_DEBUG_TX_QUEUES(mvm,
"Can't start tid %d agg on shared queue!\n",
tid);
goto release_locks;
} else if (!iwl_mvm_is_dqa_supported(mvm) ||
mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
mvm->first_agg_queue,
mvm->last_agg_queue);
if (txq_id < 0) {
ret = txq_id;
IWL_ERR(mvm, "Failed to allocate agg queue\n");
goto release_locks;
}
/* TXQ hasn't yet been enabled, so mark it only as reserved */
mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
}
spin_unlock(&mvm->queue_info_lock);
IWL_DEBUG_TX_QUEUES(mvm,
"AGG for tid %d will be on queue #%d\n",
tid, txq_id);
tid_data = &mvmsta->tid_data[tid];
tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
tid_data->txq_id = txq_id;
*ssn = tid_data->ssn;
IWL_DEBUG_TX_QUEUES(mvm,
"Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
mvmsta->sta_id, tid, txq_id, tid_data->ssn,
tid_data->next_reclaimed);
if (tid_data->ssn == tid_data->next_reclaimed) {
tid_data->state = IWL_AGG_STARTING;
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
} else {
tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
}
ret = 0;
goto out;
release_locks:
spin_unlock(&mvm->queue_info_lock);
out:
spin_unlock_bh(&mvmsta->lock);
return ret;
}
int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u8 buf_size,
bool amsdu)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
unsigned int wdg_timeout =
iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
int queue, ret;
bool alloc_queue = true;
enum iwl_mvm_queue_status queue_status;
u16 ssn;
struct iwl_trans_txq_scd_cfg cfg = {
.sta_id = mvmsta->sta_id,
.tid = tid,
.frame_limit = buf_size,
.aggregate = true,
};
BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
!= IWL_MAX_TID_COUNT);
buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
spin_lock_bh(&mvmsta->lock);
ssn = tid_data->ssn;
queue = tid_data->txq_id;
tid_data->state = IWL_AGG_ON;
mvmsta->agg_tids |= BIT(tid);
tid_data->ssn = 0xffff;
tid_data->amsdu_in_ampdu_allowed = amsdu;
spin_unlock_bh(&mvmsta->lock);
cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
spin_lock_bh(&mvm->queue_info_lock);
queue_status = mvm->queue_info[queue].status;
spin_unlock_bh(&mvm->queue_info_lock);
/* In DQA mode, the existing queue might need to be reconfigured */
if (iwl_mvm_is_dqa_supported(mvm)) {
/* Maybe there is no need to even alloc a queue... */
if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
alloc_queue = false;
/*
* Only reconfig the SCD for the queue if the window size has
* changed from current (become smaller)
*/
if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
/*
* If reconfiguring an existing queue, it first must be
* drained
*/
ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
BIT(queue));
if (ret) {
IWL_ERR(mvm,
"Error draining queue before reconfig\n");
return ret;
}
ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
mvmsta->sta_id, tid,
buf_size, ssn);
if (ret) {
IWL_ERR(mvm,
"Error reconfiguring TXQ #%d\n", queue);
return ret;
}
}
}
if (alloc_queue)
iwl_mvm_enable_txq(mvm, queue,
vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
&cfg, wdg_timeout);
/* Send ADD_STA command to enable aggs only if the queue isn't shared */
if (queue_status != IWL_MVM_QUEUE_SHARED) {
ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
if (ret)
return -EIO;
}
/* No need to mark as reserved */
spin_lock_bh(&mvm->queue_info_lock);
mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
spin_unlock_bh(&mvm->queue_info_lock);
/*
* Even though in theory the peer could have different
* aggregation reorder buffer sizes for different sessions,
* our ucode doesn't allow for that and has a global limit
* for each station. Therefore, use the minimum of all the
* aggregation sessions and our default value.
*/
mvmsta->max_agg_bufsize =
min(mvmsta->max_agg_bufsize, buf_size);
mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
sta->addr, tid);
return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
}
int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
u16 txq_id;
int err;
/*
* If mac80211 is cleaning its state, then say that we finished since
* our state has been cleared anyway.
*/
if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
return 0;
}
spin_lock_bh(&mvmsta->lock);
txq_id = tid_data->txq_id;
IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
mvmsta->sta_id, tid, txq_id, tid_data->state);
mvmsta->agg_tids &= ~BIT(tid);
spin_lock_bh(&mvm->queue_info_lock);
/*
* The TXQ is marked as reserved only if no traffic came through yet
* This means no traffic has been sent on this TID (agg'd or not), so
* we no longer have use for the queue. Since it hasn't even been
* allocated through iwl_mvm_enable_txq, so we can just mark it back as
* free.
*/
if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
spin_unlock_bh(&mvm->queue_info_lock);
switch (tid_data->state) {
case IWL_AGG_ON:
tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
IWL_DEBUG_TX_QUEUES(mvm,
"ssn = %d, next_recl = %d\n",
tid_data->ssn, tid_data->next_reclaimed);
/* There are still packets for this RA / TID in the HW */
if (tid_data->ssn != tid_data->next_reclaimed) {
tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
err = 0;
break;
}
tid_data->ssn = 0xffff;
tid_data->state = IWL_AGG_OFF;
spin_unlock_bh(&mvmsta->lock);
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
if (!iwl_mvm_is_dqa_supported(mvm)) {
int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
}
return 0;
case IWL_AGG_STARTING:
case IWL_EMPTYING_HW_QUEUE_ADDBA:
/*
* The agg session has been stopped before it was set up. This
* can happen when the AddBA timer times out for example.
*/
/* No barriers since we are under mutex */
lockdep_assert_held(&mvm->mutex);
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
tid_data->state = IWL_AGG_OFF;
err = 0;
break;
default:
IWL_ERR(mvm,
"Stopping AGG while state not ON or starting for %d on %d (%d)\n",
mvmsta->sta_id, tid, tid_data->state);
IWL_ERR(mvm,
"\ttid_data->txq_id = %d\n", tid_data->txq_id);
err = -EINVAL;
}
spin_unlock_bh(&mvmsta->lock);
return err;
}
int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
u16 txq_id;
enum iwl_mvm_agg_state old_state;
/*
* First set the agg state to OFF to avoid calling
* ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
*/
spin_lock_bh(&mvmsta->lock);
txq_id = tid_data->txq_id;
IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
mvmsta->sta_id, tid, txq_id, tid_data->state);
old_state = tid_data->state;
tid_data->state = IWL_AGG_OFF;
mvmsta->agg_tids &= ~BIT(tid);
spin_unlock_bh(&mvmsta->lock);
spin_lock_bh(&mvm->queue_info_lock);
/*
* The TXQ is marked as reserved only if no traffic came through yet
* This means no traffic has been sent on this TID (agg'd or not), so
* we no longer have use for the queue. Since it hasn't even been
* allocated through iwl_mvm_enable_txq, so we can just mark it back as
* free.
*/
if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
spin_unlock_bh(&mvm->queue_info_lock);
if (old_state >= IWL_AGG_ON) {
iwl_mvm_drain_sta(mvm, mvmsta, true);
if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
iwl_trans_wait_tx_queue_empty(mvm->trans,
mvmsta->tfd_queue_msk);
iwl_mvm_drain_sta(mvm, mvmsta, false);
iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
if (!iwl_mvm_is_dqa_supported(mvm)) {
int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
tid, 0);
}
}
return 0;
}
static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
{
int i, max = -1, max_offs = -1;
lockdep_assert_held(&mvm->mutex);
/* Pick the unused key offset with the highest 'deleted'
* counter. Every time a key is deleted, all the counters
* are incremented and the one that was just deleted is
* reset to zero. Thus, the highest counter is the one
* that was deleted longest ago. Pick that one.
*/
for (i = 0; i < STA_KEY_MAX_NUM; i++) {
if (test_bit(i, mvm->fw_key_table))
continue;
if (mvm->fw_key_deleted[i] > max) {
max = mvm->fw_key_deleted[i];
max_offs = i;
}
}
if (max_offs < 0)
return STA_KEY_IDX_INVALID;
return max_offs;
}
static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (sta)
return iwl_mvm_sta_from_mac80211(sta);
/*
* The device expects GTKs for station interfaces to be
* installed as GTKs for the AP station. If we have no
* station ID, then use AP's station ID.
*/
if (vif->type == NL80211_IFTYPE_STATION &&
mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
u8 sta_id = mvmvif->ap_sta_id;
sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
/*
* It is possible that the 'sta' parameter is NULL,
* for example when a GTK is removed - the sta_id will then
* be the AP ID, and no station was passed by mac80211.
*/
if (IS_ERR_OR_NULL(sta))
return NULL;
return iwl_mvm_sta_from_mac80211(sta);
}
return NULL;
}
static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
struct iwl_mvm_sta *mvm_sta,
struct ieee80211_key_conf *keyconf, bool mcast,
u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
u8 key_offset)
{
struct iwl_mvm_add_sta_key_cmd cmd = {};
__le16 key_flags;
int ret;
u32 status;
u16 keyidx;
int i;
u8 sta_id = mvm_sta->sta_id;
keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
STA_KEY_FLG_KEYID_MSK;
key_flags = cpu_to_le16(keyidx);
key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
switch (keyconf->cipher) {
case WLAN_CIPHER_SUITE_TKIP:
key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
cmd.tkip_rx_tsc_byte2 = tkip_iv32;
for (i = 0; i < 5; i++)
cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
memcpy(cmd.key, keyconf->key, keyconf->keylen);
break;
case WLAN_CIPHER_SUITE_CCMP:
key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
memcpy(cmd.key, keyconf->key, keyconf->keylen);
break;
case WLAN_CIPHER_SUITE_WEP104:
key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
/* fall through */
case WLAN_CIPHER_SUITE_WEP40:
key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
break;
case WLAN_CIPHER_SUITE_GCMP_256:
key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
/* fall through */
case WLAN_CIPHER_SUITE_GCMP:
key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
memcpy(cmd.key, keyconf->key, keyconf->keylen);
break;
default:
key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
memcpy(cmd.key, keyconf->key, keyconf->keylen);
}
if (mcast)
key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
cmd.key_offset = key_offset;
cmd.key_flags = key_flags;
cmd.sta_id = sta_id;
status = ADD_STA_SUCCESS;
if (cmd_flags & CMD_ASYNC)
ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
sizeof(cmd), &cmd);
else
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
&cmd, &status);
switch (status) {
case ADD_STA_SUCCESS:
IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
break;
default:
ret = -EIO;
IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
break;
}
return ret;
}
static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
struct ieee80211_key_conf *keyconf,
u8 sta_id, bool remove_key)
{
struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
/* verify the key details match the required command's expectations */
if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
(keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
(keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
return -EINVAL;
if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
return -EINVAL;
igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
igtk_cmd.sta_id = cpu_to_le32(sta_id);
if (remove_key) {
igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
} else {
struct ieee80211_key_seq seq;
const u8 *pn;
switch (keyconf->cipher) {
case WLAN_CIPHER_SUITE_AES_CMAC:
igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
break;
case WLAN_CIPHER_SUITE_BIP_GMAC_128:
case WLAN_CIPHER_SUITE_BIP_GMAC_256:
igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
break;
default:
return -EINVAL;
}
memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
igtk_cmd.ctrl_flags |=
cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
ieee80211_get_key_rx_seq(keyconf, 0, &seq);
pn = seq.aes_cmac.pn;
igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
((u64) pn[4] << 8) |
((u64) pn[3] << 16) |
((u64) pn[2] << 24) |
((u64) pn[1] << 32) |
((u64) pn[0] << 40));
}
IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
remove_key ? "removing" : "installing",
igtk_cmd.sta_id);
if (!iwl_mvm_has_new_rx_api(mvm)) {
struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
.ctrl_flags = igtk_cmd.ctrl_flags,
.key_id = igtk_cmd.key_id,
.sta_id = igtk_cmd.sta_id,
.receive_seq_cnt = igtk_cmd.receive_seq_cnt
};
memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
ARRAY_SIZE(igtk_cmd_v1.igtk));
return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
sizeof(igtk_cmd_v1), &igtk_cmd_v1);
}
return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
sizeof(igtk_cmd), &igtk_cmd);
}
static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (sta)
return sta->addr;
if (vif->type == NL80211_IFTYPE_STATION &&
mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
u8 sta_id = mvmvif->ap_sta_id;
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
return sta->addr;
}
return NULL;
}
static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *keyconf,
u8 key_offset,
bool mcast)
{
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
int ret;
const u8 *addr;
struct ieee80211_key_seq seq;
u16 p1k[5];
switch (keyconf->cipher) {
case WLAN_CIPHER_SUITE_TKIP:
addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
/* get phase 1 key from mac80211 */
ieee80211_get_key_rx_seq(keyconf, 0, &seq);
ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
seq.tkip.iv32, p1k, 0, key_offset);
break;
case WLAN_CIPHER_SUITE_CCMP:
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
case WLAN_CIPHER_SUITE_GCMP:
case WLAN_CIPHER_SUITE_GCMP_256:
ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
0, NULL, 0, key_offset);
break;
default:
ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
0, NULL, 0, key_offset);
}
return ret;
}
static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
struct ieee80211_key_conf *keyconf,
bool mcast)
{
struct iwl_mvm_add_sta_key_cmd cmd = {};
__le16 key_flags;
int ret;
u32 status;
key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
STA_KEY_FLG_KEYID_MSK);
key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
if (mcast)
key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
cmd.key_flags = key_flags;
cmd.key_offset = keyconf->hw_key_idx;
cmd.sta_id = sta_id;
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
&cmd, &status);
switch (status) {
case ADD_STA_SUCCESS:
IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
break;
default:
ret = -EIO;
IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
break;
}
return ret;
}
int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *keyconf,
u8 key_offset)
{
bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
struct iwl_mvm_sta *mvm_sta;
u8 sta_id;
int ret;
static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
lockdep_assert_held(&mvm->mutex);
/* Get the station id from the mvm local station table */
mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
if (!mvm_sta) {
IWL_ERR(mvm, "Failed to find station\n");
return -EINVAL;
}
sta_id = mvm_sta->sta_id;
if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
goto end;
}
/*
* It is possible that the 'sta' parameter is NULL, and thus
* there is a need to retrieve the sta from the local station table.
*/
if (!sta) {
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
if (IS_ERR_OR_NULL(sta)) {
IWL_ERR(mvm, "Invalid station id\n");
return -EINVAL;
}
}
if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
return -EINVAL;
/* If the key_offset is not pre-assigned, we need to find a
* new offset to use. In normal cases, the offset is not
* pre-assigned, but during HW_RESTART we want to reuse the
* same indices, so we pass them when this function is called.
*
* In D3 entry, we need to hardcoded the indices (because the
* firmware hardcodes the PTK offset to 0). In this case, we
* need to make sure we don't overwrite the hw_key_idx in the
* keyconf structure, because otherwise we cannot configure
* the original ones back when resuming.
*/
if (key_offset == STA_KEY_IDX_INVALID) {
key_offset = iwl_mvm_set_fw_key_idx(mvm);
if (key_offset == STA_KEY_IDX_INVALID)
return -ENOSPC;
keyconf->hw_key_idx = key_offset;
}
ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
if (ret)
goto end;
/*
* For WEP, the same key is used for multicast and unicast. Upload it
* again, using the same key offset, and now pointing the other one
* to the same key slot (offset).
* If this fails, remove the original as well.
*/
if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
key_offset, !mcast);
if (ret) {
__iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
goto end;
}
}
__set_bit(key_offset, mvm->fw_key_table);
end:
IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
keyconf->cipher, keyconf->keylen, keyconf->keyidx,
sta ? sta->addr : zero_addr, ret);
return ret;
}
int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *keyconf)
{
bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
struct iwl_mvm_sta *mvm_sta;
u8 sta_id = IWL_MVM_STATION_COUNT;
int ret, i;
lockdep_assert_held(&mvm->mutex);
/* Get the station from the mvm local station table */
mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
keyconf->keyidx, sta_id);
if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
IWL_ERR(mvm, "offset %d not used in fw key table.\n",
keyconf->hw_key_idx);
return -ENOENT;
}
/* track which key was deleted last */
for (i = 0; i < STA_KEY_MAX_NUM; i++) {
if (mvm->fw_key_deleted[i] < U8_MAX)
mvm->fw_key_deleted[i]++;
}
mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
if (!mvm_sta) {
IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
return 0;
}
sta_id = mvm_sta->sta_id;
ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
if (ret)
return ret;
/* delete WEP key twice to get rid of (now useless) offset */
if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
return ret;
}
void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_key_conf *keyconf,
struct ieee80211_sta *sta, u32 iv32,
u16 *phase1key)
{
struct iwl_mvm_sta *mvm_sta;
bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
rcu_read_lock();
mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
if (WARN_ON_ONCE(!mvm_sta))
goto unlock;
iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
unlock:
rcu_read_unlock();
}
void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
struct ieee80211_sta *sta)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_add_sta_cmd cmd = {
.add_modify = STA_MODE_MODIFY,
.sta_id = mvmsta->sta_id,
.station_flags_msk = cpu_to_le32(STA_FLG_PS),
.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
};
int ret;
ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
iwl_mvm_add_sta_cmd_size(mvm), &cmd);
if (ret)
IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
struct ieee80211_sta *sta,
enum ieee80211_frame_release_type reason,
u16 cnt, u16 tids, bool more_data,
bool agg)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_add_sta_cmd cmd = {
.add_modify = STA_MODE_MODIFY,
.sta_id = mvmsta->sta_id,
.modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
.sleep_tx_count = cpu_to_le16(cnt),
.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
};
int tid, ret;
unsigned long _tids = tids;
/* convert TIDs to ACs - we don't support TSPEC so that's OK
* Note that this field is reserved and unused by firmware not
* supporting GO uAPSD, so it's safe to always do this.
*/
for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
/* If we're releasing frames from aggregation queues then check if the
* all queues combined that we're releasing frames from have
* - more frames than the service period, in which case more_data
* needs to be set
* - fewer than 'cnt' frames, in which case we need to adjust the
* firmware command (but do that unconditionally)
*/
if (agg) {
int remaining = cnt;
int sleep_tx_count;
spin_lock_bh(&mvmsta->lock);
for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
struct iwl_mvm_tid_data *tid_data;
u16 n_queued;
tid_data = &mvmsta->tid_data[tid];
if (WARN(tid_data->state != IWL_AGG_ON &&
tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
"TID %d state is %d\n",
tid, tid_data->state)) {
spin_unlock_bh(&mvmsta->lock);
ieee80211_sta_eosp(sta);
return;
}
n_queued = iwl_mvm_tid_queued(tid_data);
if (n_queued > remaining) {
more_data = true;
remaining = 0;
break;
}
remaining -= n_queued;
}
sleep_tx_count = cnt - remaining;
if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
mvmsta->sleep_tx_count = sleep_tx_count;
spin_unlock_bh(&mvmsta->lock);
cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
if (WARN_ON(cnt - remaining == 0)) {
ieee80211_sta_eosp(sta);
return;
}
}
/* Note: this is ignored by firmware not supporting GO uAPSD */
if (more_data)
cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
mvmsta->next_status_eosp = true;
cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
} else {
cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
}
/* block the Tx queues until the FW updated the sleep Tx count */
iwl_trans_block_txq_ptrs(mvm->trans, true);
ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
iwl_mvm_add_sta_cmd_size(mvm), &cmd);
if (ret)
IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
struct ieee80211_sta *sta;
u32 sta_id = le32_to_cpu(notif->sta_id);
if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
return;
rcu_read_lock();
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
if (!IS_ERR_OR_NULL(sta))
ieee80211_sta_eosp(sta);
rcu_read_unlock();
}
void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
struct iwl_mvm_sta *mvmsta, bool disable)
{
struct iwl_mvm_add_sta_cmd cmd = {
.add_modify = STA_MODE_MODIFY,
.sta_id = mvmsta->sta_id,
.station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
.station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
};
int ret;
ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
iwl_mvm_add_sta_cmd_size(mvm), &cmd);
if (ret)
IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
struct ieee80211_sta *sta,
bool disable)
{
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
spin_lock_bh(&mvm_sta->lock);
if (mvm_sta->disable_tx == disable) {
spin_unlock_bh(&mvm_sta->lock);
return;
}
mvm_sta->disable_tx = disable;
/*
* Tell mac80211 to start/stop queuing tx for this station,
* but don't stop queuing if there are still pending frames
* for this station.
*/
if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
ieee80211_sta_block_awake(mvm->hw, sta, disable);
iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
spin_unlock_bh(&mvm_sta->lock);
}
void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
struct iwl_mvm_vif *mvmvif,
bool disable)
{
struct ieee80211_sta *sta;
struct iwl_mvm_sta *mvm_sta;
int i;
lockdep_assert_held(&mvm->mutex);
/* Block/unblock all the stations of the given mvmvif */
for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
lockdep_is_held(&mvm->mutex));
if (IS_ERR_OR_NULL(sta))
continue;
mvm_sta = iwl_mvm_sta_from_mac80211(sta);
if (mvm_sta->mac_id_n_color !=
FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
continue;
iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
}
}
void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_sta *mvmsta;
rcu_read_lock();
mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
if (!WARN_ON(!mvmsta))
iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
rcu_read_unlock();
}