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fuchsia / drivers / wlan / intel / iwlwifi / 4de0dbb8e99536af8ca65e3eca1b0d73ce1bfeed / . / third_party / iwlwifi / mvm / sta.c
blob: 6a91ae845aae77a04414534161ef20a43bd26929 [file] [log] [blame]
/******************************************************************************
*
* Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2016 - 2017 Intel Deutschland GmbH
* Copyright(c) 2018 Intel Corporation
* 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 "src/iwlwifi/mvm/sta.h"
#include <zircon/status.h>
#include "src/iwlwifi/mvm/mvm.h"
#include "src/iwlwifi/mvm/rs.h"
#include "src/iwlwifi/platform/ieee80211.h"
static zx_status_t iwl_mvm_set_fw_key_idx(struct iwl_mvm* mvm);
static zx_status_t iwl_mvm_send_sta_key(struct iwl_mvm* mvm, uint32_t sta_id,
const struct iwl_mvm_sta_key_conf* keyconf, bool mcast,
uint32_t tkip_iv32, uint16_t* tkip_p1k, uint32_t cmd_flags,
uint8_t key_offset, bool mfp);
/*
* 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) {
if (iwl_mvm_has_new_rx_api(mvm) || fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
return sizeof(struct iwl_mvm_add_sta_cmd);
} else {
return sizeof(struct iwl_mvm_add_sta_cmd_v7);
}
}
// Return an index that is not used yet.
//
// Note that in order to avoid race condition, the mvm->mutex must be hold before calling this
// function, and cannot be released before adding new STA to mvm->fw_id_to_mac_id[].
//
static int iwl_mvm_find_free_sta_id(struct iwl_mvm* mvm, wlan_info_mac_role_t mac_role) {
uint32_t reserved_ids = 0;
BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
iwl_assert_lock_held(&mvm->mutex);
/* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
if (mac_role != WLAN_INFO_MAC_ROLE_CLIENT) {
reserved_ids = BIT(0);
}
// find an empty slot in mvm->fw_id_to_mac_id array.
for (size_t sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) {
if (BIT(sta_id) & reserved_ids) {
continue;
}
if (!mvm->fw_id_to_mac_id[sta_id]) {
return sta_id;
}
}
return IWL_MVM_INVALID_STA;
}
/* send station add/update command to firmware */
zx_status_t iwl_mvm_sta_send_to_fw(struct iwl_mvm* mvm, struct iwl_mvm_sta* mvm_sta, bool update,
unsigned int flags) {
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 | STA_FLG_RTS_MIMO_PROT),
.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
};
zx_status_t ret;
uint32_t status;
if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
add_sta_cmd.station_type = mvm_sta->sta_type;
}
if (!update || (flags & STA_MODIFY_QUEUES)) {
memcpy(add_sta_cmd.addr, mvm_sta->addr, ETH_ALEN);
if (!iwl_mvm_has_new_tx_api(mvm)) {
add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
if (flags & STA_MODIFY_QUEUES) {
add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
}
} else {
WARN_ON(flags & STA_MODIFY_QUEUES);
}
}
#if 1 // NEEDS_PORTING
add_sta_cmd.station_flags |=
cpu_to_le32(STA_FLG_MIMO_EN_SISO) | cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
#else
uint32_t agg_size = 0, mpdu_dens = 0;
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);
if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC) {
add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
}
if (sta->wme) {
add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) {
add_sta_cmd.uapsd_acs |= BIT(AC_BK);
}
if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) {
add_sta_cmd.uapsd_acs |= BIT(AC_BE);
}
if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) {
add_sta_cmd.uapsd_acs |= BIT(AC_VI);
}
if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) {
add_sta_cmd.uapsd_acs |= BIT(AC_VO);
}
add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
}
#endif // NEEDS_PORTING
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 != ZX_OK) {
return ret;
}
switch (status & IWL_ADD_STA_STATUS_MASK) {
case ADD_STA_SUCCESS:
IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
break;
default:
ret = ZX_ERR_IO;
IWL_ERR(mvm, "ADD_STA failed\n");
break;
}
return ret;
}
#if 0 // NEEDS_PORTING
static void iwl_mvm_rx_agg_session_expired(struct timer_list* t) {
struct iwl_mvm_baid_data* data = from_timer(data, t, session_timer);
struct iwl_mvm_baid_data __rcu** rcu_ptr = data->rcu_ptr;
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]);
/*
* sta should be valid unless the following happens:
* The firmware asserts which triggers a reconfig flow, but
* the reconfig fails before we set the pointer to sta into
* the fw_id_to_mac_id pointer table. Mac80211 can't stop
* A-MDPU and hence the timer continues to run. Then, the
* timer expires and sta is NULL.
*/
if (!sta) {
goto unlock;
}
mvm_sta = iwl_mvm_sta_from_mac80211(sta);
ieee80211_rx_ba_timer_expired(mvm_sta->vif, sta->addr, ba_data->tid);
unlock:
rcu_read_unlock();
}
/* 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;
uint32_t status;
uint8_t sta_id;
int ret;
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) {
return -EINVAL;
}
sta_id = mvm->queue_info[queue].ra_sta_id;
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;
}
#endif // NEEDS_PORTING
static zx_status_t iwl_mvm_disable_txq(struct iwl_mvm* mvm, struct iwl_mvm_sta* sta, int queue,
uint8_t tid, uint8_t flags) {
struct iwl_scd_txq_cfg_cmd cmd = {
.scd_queue = queue,
.action = SCD_CFG_DISABLE_QUEUE,
};
if (iwl_mvm_has_new_tx_api(mvm)) {
iwl_trans_txq_free(mvm->trans, queue);
return ZX_OK;
}
if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) {
return ZX_OK;
}
mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
cmd.action = mvm->queue_info[queue].tid_bitmap ? SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
if (cmd.action == SCD_CFG_DISABLE_QUEUE) {
mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;
}
IWL_DEBUG_TX_QUEUES(mvm, "Disabling TXQ #%d tids=0x%x\n", queue,
mvm->queue_info[queue].tid_bitmap);
/* If the queue is still enabled - nothing left to do in this func */
if (cmd.action == SCD_CFG_ENABLE_QUEUE) {
return ZX_OK;
}
cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
cmd.tid = mvm->queue_info[queue].txq_tid;
/* Make sure queue info is correct even though we overwrite it */
WARN(mvm->queue_info[queue].tid_bitmap, "TXQ #%d info out-of-sync - tids=0x%x\n", queue,
mvm->queue_info[queue].tid_bitmap);
/* If we are here - the queue is freed and we can zero out these vals */
mvm->queue_info[queue].tid_bitmap = 0;
if (sta) {
struct iwl_mvm_txq* mvmtxq = sta->txq[tid];
mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
}
/* Regardless if this is a reserved TXQ for a STA - mark it as false */
mvm->queue_info[queue].reserved = false;
iwl_trans_txq_disable(mvm->trans, queue, false);
zx_status_t ret =
iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags, sizeof(struct iwl_scd_txq_cfg_cmd), &cmd);
if (ret != ZX_OK) {
IWL_ERR(mvm, "Failed to disable queue %d (ret=%s)\n", queue, zx_status_get_string(ret));
}
return ret;
}
#if 0 // NEEDS_PORTING
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;
uint8_t sta_id;
int tid;
iwl_assert_lock_held(&mvm->mutex);
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) {
return -EINVAL;
}
sta_id = mvm->queue_info[queue].ra_sta_id;
tid_bitmap = mvm->queue_info[queue].tid_bitmap;
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;
uint8_t sta_id;
int tid;
iwl_assert_lock_held(&mvm->mutex);
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) {
return -EINVAL;
}
sta_id = mvm->queue_info[queue].ra_sta_id;
tid_bitmap = mvm->queue_info[queue].tid_bitmap;
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) {
struct iwl_mvm_txq* mvmtxq = iwl_mvm_txq_from_tid(sta, tid);
if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
disable_agg_tids |= BIT(tid);
}
mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
}
mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
spin_unlock_bh(&mvmsta->lock);
rcu_read_unlock();
/*
* The TX path may have been using this TXQ_ID from the tid_data,
* so make sure it's no longer running so that we can safely reuse
* this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE
* above, but nothing guarantees we've stopped using them. Thus,
* without this, we could get to iwl_mvm_disable_txq() and remove
* the queue while still sending frames to it.
*/
synchronize_net();
return disable_agg_tids;
}
static int iwl_mvm_free_inactive_queue(struct iwl_mvm* mvm, int queue,
struct ieee80211_sta* old_sta, uint8_t new_sta_id) {
struct iwl_mvm_sta* mvmsta;
uint8_t sta_id, tid;
unsigned long disable_agg_tids = 0;
bool same_sta;
int ret;
iwl_assert_lock_held(&mvm->mutex);
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) {
return -EINVAL;
}
sta_id = mvm->queue_info[queue].ra_sta_id;
tid = mvm->queue_info[queue].txq_tid;
same_sta = sta_id == new_sta_id;
same_sta = sta_id == new_sta_id;
mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
if (WARN_ON(!mvmsta)) {
return -EINVAL;
}
disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
/* Disable the queue */
if (disable_agg_tids) {
iwl_mvm_invalidate_sta_queue(mvm, queue, disable_agg_tids, false);
}
ret = iwl_mvm_disable_txq(mvm, old_sta, queue, tid, 0);
if (ret != ZX_OK) {
IWL_ERR(mvm, "Failed to free inactive queue %d (ret=%d)\n", queue, ret);
return ret;
}
/* If TXQ is allocated to another STA, update removal in FW */
if (!same_sta) {
iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
}
return 0;
}
static int iwl_mvm_get_shared_queue(struct iwl_mvm* mvm, unsigned long tfd_queue_mask, uint8_t ac) {
int queue = 0;
uint8_t ac_to_queue[IEEE80211_AC_MAX];
int i;
/*
* This protects us against grabbing a queue that's being reconfigured
* by the inactivity checker.
*/
iwl_assert_lock_held(&mvm->mutex);
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) {
return -EINVAL;
}
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;
}
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;
}
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.
*/
static int iwl_mvm_redirect_queue(struct iwl_mvm* mvm, int queue, int tid, int ac, int ssn,
unsigned int wdg_timeout, bool force, struct iwl_mvm_txq* txq) {
struct iwl_scd_txq_cfg_cmd cmd = {
.scd_queue = queue,
.action = SCD_CFG_DISABLE_QUEUE,
};
bool shared_queue;
int ret;
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) {
return -EINVAL;
}
/*
* 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.
*/
if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
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;
shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1;
IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", queue, iwl_mvm_ac_to_tx_fifo[ac]);
/* Stop the queue and wait for it to empty */
txq->stopped = true;
ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
if (ret != ZX_OK) {
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 != ZX_OK) {
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 */
mvm->queue_info[queue].txq_tid = tid;
/* 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, IWL_FRAME_LIMIT,
ssn);
/* Update AC marking of the queue */
mvm->queue_info[queue].mac80211_ac = ac;
/*
* 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 queue */
txq->stopped = false;
return ret;
}
#endif // NEEDS_PORTING
// Look up the mvm->queue_info[] and return the free queue.
//
// A queue is considered free if it meets all of the following 2 conditions:
//
// + No TID is using it (tid_bitmap is 0).
// + Status indidates it is free.
//
// Returns:
// negative: no free queue is found.
// others: found one.
//
static int iwl_mvm_find_free_queue(struct iwl_mvm* mvm, uint8_t sta_id, int minq, int maxq) {
if (minq > maxq) {
IWL_WARN(mvm, "wrong range of qid is given: minq=%d maxq=%d\n", minq, maxq);
return -1;
}
iwl_assert_lock_held(&mvm->mutex);
/* This should not be hit with new TX path */
if (iwl_mvm_has_new_tx_api(mvm)) {
IWL_WARN(mvm, "this should not be hit with new TX path.\n");
return -1;
}
/* Start by looking for a free queue */
for (int i = minq; i <= maxq; i++) {
if (mvm->queue_info[i].tid_bitmap == 0 && mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE) {
return i;
}
}
return -1;
}
#if 0 // NEEDS_PORTING
static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm* mvm, uint8_t sta_id, uint8_t tid,
unsigned int timeout) {
int queue, size = IWL_DEFAULT_QUEUE_SIZE;
if (tid == IWL_MAX_TID_COUNT) {
tid = IWL_MGMT_TID;
size = IWL_MGMT_QUEUE_SIZE;
}
queue = iwl_trans_txq_alloc(mvm->trans, cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE), sta_id, tid,
SCD_QUEUE_CFG, size, timeout);
if (queue < 0) {
IWL_DEBUG_TX_QUEUES(mvm, "Failed allocating TXQ for sta %d tid %d, ret: %d\n", sta_id, tid,
queue);
return queue;
}
IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n", queue, sta_id, tid);
IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d\n", queue);
return queue;
}
static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm* mvm, struct ieee80211_sta* sta, uint8_t ac,
int tid) {
struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_txq* mvmtxq = iwl_mvm_txq_from_tid(sta, tid);
unsigned int wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
int queue = -1;
iwl_assert_lock_held(&mvm->mutex);
IWL_DEBUG_TX_QUEUES(mvm, "Allocating queue for sta %d on tid %d\n", mvmsta->sta_id, tid);
queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout);
if (queue < 0) {
return queue;
}
if (sta) {
mvmtxq->txq_id = queue;
mvm->tvqm_info[queue].txq_tid = tid;
}
IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
spin_lock_bh(&mvmsta->lock);
mvmsta->tid_data[tid].txq_id = queue;
spin_unlock_bh(&mvmsta->lock);
return 0;
}
#endif // NEEDS_PORTING
// Update the tid info in the corresponding mvm->queue_info[txq_id].
static bool iwl_mvm_update_txq_mapping(struct iwl_mvm* mvm, struct iwl_mvm_sta* mvm_sta, int txq_id,
uint8_t sta_id, uint8_t tid) {
bool enable_queue = true;
/* Make sure this TID isn't already enabled */
if (mvm->queue_info[txq_id].tid_bitmap & BIT(tid)) {
IWL_ERR(mvm, "Trying to enable TXQ txq_id:%d with existing TID %d\n", txq_id, tid);
return false;
}
/* Update mappings and refcounts */
if (mvm->queue_info[txq_id].tid_bitmap) {
enable_queue = false;
}
mvm->queue_info[txq_id].tid_bitmap |= BIT(tid);
mvm->queue_info[txq_id].ra_sta_id = sta_id;
if (enable_queue) {
if (tid != IWL_MAX_TID_COUNT) {
mvm->queue_info[txq_id].mac80211_ac = tid_to_mac80211_ac[tid];
} else {
mvm->queue_info[txq_id].mac80211_ac = IEEE80211_AC_VO;
}
mvm->queue_info[txq_id].txq_tid = tid;
}
if (mvm_sta) {
struct iwl_mvm_txq* mvmtxq = mvm_sta->txq[tid];
mvmtxq->txq_id = txq_id;
}
IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ txq_id=#%d tids=0x%x\n", txq_id,
mvm->queue_info[txq_id].tid_bitmap);
return enable_queue;
}
bool iwl_mvm_enable_txq(struct iwl_mvm* mvm, struct iwl_mvm_sta* sta, int txq_id, uint16_t ssn,
const struct iwl_trans_txq_scd_cfg* cfg, zx_duration_t wdg_timeout) {
struct iwl_scd_txq_cfg_cmd cmd = {
.scd_queue = txq_id,
.action = SCD_CFG_ENABLE_QUEUE,
.window = cfg->frame_limit,
.sta_id = cfg->sta_id,
.ssn = cpu_to_le16(ssn),
.tx_fifo = cfg->fifo,
.aggregate = cfg->aggregate,
.tid = cfg->tid,
};
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) {
return false;
}
/* Send the enabling command if we need to */
if (!iwl_mvm_update_txq_mapping(mvm, sta, txq_id, cfg->sta_id, cfg->tid)) {
return false;
}
bool inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, txq_id, ssn, NULL, wdg_timeout);
if (inc_ssn) {
cmd.ssn = cpu_to_le16(le16_to_cpu(cmd.ssn) + 1);
}
zx_status_t ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
if (ret != ZX_OK) {
IWL_ERR(mvm, "Failed to configure queue txq_id:%d on FIFO %d\n", txq_id, cfg->fifo);
}
return inc_ssn;
}
#if 0 // NEEDS_PORTING
static void iwl_mvm_change_queue_tid(struct iwl_mvm* mvm, int queue) {
struct iwl_scd_txq_cfg_cmd cmd = {
.scd_queue = queue,
.action = SCD_CFG_UPDATE_QUEUE_TID,
};
int tid;
unsigned long tid_bitmap;
int ret;
iwl_assert_lock_held(&mvm->mutex);
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) {
return;
}
tid_bitmap = mvm->queue_info[queue].tid_bitmap;
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);
return;
}
mvm->queue_info[queue].txq_tid = tid;
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;
uint8_t sta_id;
int tid = -1;
unsigned long tid_bitmap;
unsigned int wdg_timeout;
int ssn;
int ret = true;
/* queue sharing is disabled on new TX path */
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) {
return;
}
iwl_assert_lock_held(&mvm->mutex);
sta_id = mvm->queue_info[queue].ra_sta_id;
tid_bitmap = mvm->queue_info[queue].tid_bitmap;
/* 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_redirect_queue(mvm, queue, tid, tid_to_mac80211_ac[tid], ssn, wdg_timeout, true,
iwl_mvm_txq_from_tid(sta, tid));
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);
}
}
mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
}
/*
* Remove inactive TIDs of a given queue.
* If all queue TIDs are inactive - mark the queue as inactive
* If only some the queue TIDs are inactive - unmap them from the queue
*
* Returns %true if all TIDs were removed and the queue could be reused.
*/
static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm* mvm, struct iwl_mvm_sta* mvmsta, int queue,
unsigned long tid_bitmap, unsigned long* unshare_queues,
unsigned long* changetid_queues) {
int tid;
iwl_assert_lock_held(&mvmsta->lock);
iwl_assert_lock_held(&mvm->mutex);
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) {
return false;
}
/* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
/* If some TFDs are still queued - don't mark TID as inactive */
if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid])) {
tid_bitmap &= ~BIT(tid);
}
/* Don't mark as inactive any TID that has an active BA */
if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
tid_bitmap &= ~BIT(tid);
}
}
/* If all TIDs in the queue are inactive - return it can be reused */
if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
return true;
}
/*
* If we are here, this is a shared queue and not all TIDs timed-out.
* Remove the ones that did.
*/
for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
uint16_t tid_bitmap;
mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
tid_bitmap = mvm->queue_info[queue].tid_bitmap;
/*
* 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.
*
* Mark this queue in the right bitmap, we'll send the command
* to the firmware later.
*/
if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid))) {
set_bit(queue, changetid_queues);
}
IWL_DEBUG_TX_QUEUES(mvm, "Removing inactive TID %d from shared Q:%d\n", tid, queue);
}
IWL_DEBUG_TX_QUEUES(mvm, "TXQ #%d left with tid bitmap 0x%x\n", queue,
mvm->queue_info[queue].tid_bitmap);
/*
* There may be different TIDs with the same mac queues, so make
* sure all TIDs have existing corresponding mac queues enabled
*/
tid_bitmap = mvm->queue_info[queue].tid_bitmap;
/* If the queue is marked as shared - "unshare" it */
if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n", queue);
set_bit(queue, unshare_queues);
}
return false;
}
/*
* Check for inactivity - this includes checking if any queue
* can be unshared and finding one (and only one) that can be
* reused.
* This function is also invoked as a sort of clean-up task,
* in which case @alloc_for_sta is IWL_MVM_INVALID_STA.
*
* Returns the queue number, or -ENOSPC.
*/
static int iwl_mvm_inactivity_check(struct iwl_mvm* mvm, uint8_t alloc_for_sta) {
unsigned long now = jiffies;
unsigned long unshare_queues = 0;
unsigned long changetid_queues = 0;
int i, ret, free_queue = -ENOSPC;
struct ieee80211_sta* queue_owner = NULL;
iwl_assert_lock_held(&mvm->mutex);
if (iwl_mvm_has_new_tx_api(mvm)) {
return -ENOSPC;
}
rcu_read_lock();
/* we skip the CMD queue below by starting at 1 */
BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
struct ieee80211_sta* sta;
struct iwl_mvm_sta* mvmsta;
uint8_t sta_id;
int tid;
unsigned long inactive_tid_bitmap = 0;
unsigned long queue_tid_bitmap;
queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
if (!queue_tid_bitmap) {
continue;
}
/* If TXQ isn't in active use anyway - nothing to do here... */
if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) {
continue;
}
/* Check to see if there are inactive TIDs on this queue */
for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
if (time_after(mvm->queue_info[i].last_frame_time[tid] + IWL_MVM_DQA_QUEUE_TIMEOUT, now)) {
continue;
}
inactive_tid_bitmap |= BIT(tid);
}
/* If all TIDs are active - finish check on this queue */
if (!inactive_tid_bitmap) {
continue;
}
/*
* If we are here - the queue hadn't been served recently and is
* in use
*/
sta_id = mvm->queue_info[i].ra_sta_id;
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
/*
* If the STA doesn't exist anymore, it isn't an error. It could
* be that it was removed since getting the queues, and in this
* case it should've inactivated its queues anyway.
*/
if (IS_ERR_OR_NULL(sta)) {
continue;
}
mvmsta = iwl_mvm_sta_from_mac80211(sta);
spin_lock_bh(&mvmsta->lock);
ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i, inactive_tid_bitmap, &unshare_queues,
&changetid_queues);
if (ret >= 0 && free_queue < 0) {
queue_owner = sta;
free_queue = ret;
}
/* only unlock sta lock - we still need the queue info lock */
spin_unlock_bh(&mvmsta->lock);
}
/* Reconfigure queues requiring reconfiguation */
for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES) iwl_mvm_unshare_queue(mvm, i);
for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES) iwl_mvm_change_queue_tid(mvm, i);
if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, alloc_for_sta);
if (ret) {
rcu_read_unlock();
return ret;
}
}
rcu_read_unlock();
return free_queue;
}
#endif // NEEDS_PORTING
zx_status_t iwl_mvm_sta_alloc_queue(struct iwl_mvm* mvm, struct iwl_mvm_sta* mvmsta, uint8_t ac,
int tid) {
struct iwl_trans_txq_scd_cfg cfg = {
.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
.sta_id = mvmsta->sta_id,
.tid = tid,
.frame_limit = IWL_FRAME_LIMIT,
};
zx_duration_t wdg_timeout = iwl_mvm_get_wd_timeout(mvm, NULL, false, false);
int queue = -1; // negative means no queue is found yet.
bool shared_queue = false, inc_ssn;
int ssn;
zx_status_t ret;
iwl_assert_lock_held(&mvm->mutex);
#if 0 // NEEDS_PORTING
if (iwl_mvm_has_new_tx_api(mvm)) {
return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
}
#endif // NEEDS_PORTING
mtx_lock(&mvmsta->lock);
ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
mtx_unlock(&mvmsta->lock);
if (tid == IWL_MAX_TID_COUNT) {
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)) {
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);
}
#if 0 // NEEDS_PORTING
// TODO(49529): check inactive Tx queue
if (queue < 0) {
/* try harder - perhaps kill an inactive queue */
queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
}
// TODO(49530): supports shared Tx queue
/* 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;
}
}
#endif // NEEDS_PORTING
/*
* 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;
}
/* 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 ZX_ERR_NO_RESOURCES;
}
/*
* 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);
IWL_DEBUG_TX_QUEUES(mvm, "Allocating %squeue #%d to sta %d on tid %d\n",
shared_queue ? "shared " : "", queue, mvmsta->sta_id, tid);
#if 0 // NEEDS_PORTING
// TODO(49530): supports shared Tx queue
if (shared_queue) {
// TODO(49528): disable Tx aggregations
/* Disable any open aggs on this queue */
unsigned long 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);
}
}
#endif // NEEDSPORTING
inc_ssn = iwl_mvm_enable_txq(mvm, mvmsta, queue, ssn, &cfg, wdg_timeout);
#if 0 // NEEDS_PORTING
// TODO(49530): supports shared Tx queue
/*
* 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);
}
#endif // NEEDSPORTING
// Update the mvmsta data structure.
mtx_lock(&mvmsta->lock);
if (inc_ssn) {
mvmsta->tid_data[tid].seq_number += 0x10;
ssn = (ssn + 1) & (IEEE80211_SCTL_SEQ_MASK << IEEE80211_SCTL_SEQ_OFFSET);
}
mvmsta->tid_data[tid].txq_id = queue;
mvmsta->tfd_queue_msk |= BIT(queue);
if (mvmsta->reserved_queue == queue) {
mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
}
mtx_unlock(&mvmsta->lock);
if (!shared_queue) {
ret = iwl_mvm_sta_send_to_fw(mvm, mvmsta, true, STA_MODIFY_QUEUES);
if (ret != ZX_OK) {
goto out_err;
}
#if 0 // NEED_PORTING
// TODO(49528): enable Tx aggregations
/* 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;
}
}
#endif // NEEDS_PORTING
} else {
#if 0 // NEED_PORTING
// TODO(49530): supports shared Tx queue
/* Redirect queue, if needed */
unsigned int wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn, wdg_timeout, false,
iwl_mvm_txq_from_tid(sta, tid));
if (ret) {
goto out_err;
}
#endif // NEEDS_PORTING
}
return ZX_OK;
out_err:
if (ZX_OK == iwl_mvm_disable_txq(mvm, mvmsta, queue, tid, 0)) {
IWL_ERR(mvmsta, "cannot disable txq\n");
}
return ret;
}
#if 0 // NEEDS_PORTING
static inline uint8_t 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];
}
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);
mutex_lock(&mvm->mutex);
iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
while (!list_empty(&mvm->add_stream_txqs)) {
struct iwl_mvm_txq* mvmtxq;
struct ieee80211_txq* txq;
uint8_t tid;
mvmtxq = list_first_entry(&mvm->add_stream_txqs, struct iwl_mvm_txq, list);
txq = container_of((void*)mvmtxq, struct ieee80211_txq, drv_priv);
tid = txq->tid;
if (tid == IEEE80211_TIDS_MAX) {
tid = IWL_MAX_TID_COUNT;
}
iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid);
list_del_init(&mvmtxq->list);
local_bh_disable();
iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
local_bh_enable();
}
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;
/* queue reserving is disabled on new TX path */
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) {
return 0;
}
/* run the general cleanup/unsharing of queues */
iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
/* 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].tid_bitmap &&
(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) {
/* try again - this time kick out a queue if needed */
queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
if (queue < 0) {
IWL_ERR(mvm, "No available queues for new station\n");
return -ENOSPC;
}
}
mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
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 ieee80211_sta* sta) {
struct iwl_mvm_sta* mvm_sta = iwl_mvm_sta_from_mac80211(sta);
unsigned int wdg = 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;
if (txq_id == IWL_MVM_INVALID_QUEUE) {
continue;
}
ac = tid_to_mac80211_ac[i];
if (iwl_mvm_has_new_tx_api(mvm)) {
IWL_DEBUG_TX_QUEUES(mvm, "Re-mapping sta %d tid %d\n", mvm_sta->sta_id, i);
txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id, i, wdg);
tid_data->txq_id = txq_id;
/*
* Since we don't set the seq number after reset, and HW
* sets it now, FW reset will cause the seq num to start
* at 0 again, so driver will need to update it
* internally as well, so it keeps in sync with real val
*/
tid_data->seq_number = 0;
} else {
uint16_t seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
cfg.tid = i;
cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, 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, sta, txq_id, seq, &cfg, wdg);
mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
}
}
}
static int iwl_mvm_add_int_sta_common(struct iwl_mvm* mvm, struct iwl_mvm_int_sta* sta,
const uint8_t* addr, uint16_t mac_id, uint16_t color) {
struct iwl_mvm_add_sta_cmd cmd;
int ret;
uint32_t status = ADD_STA_SUCCESS;
iwl_assert_lock_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));
if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
cmd.station_type = sta->type;
}
if (!iwl_mvm_has_new_tx_api(mvm)) {
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;
}
#endif // NEEDS_PORTING
zx_status_t iwl_mvm_add_sta(struct iwl_mvm_vif* mvmvif, struct iwl_mvm_sta* mvm_sta) {
int ret, sta_id;
bool sta_update = false;
unsigned int sta_flags = 0;
iwl_assert_lock_held(&mvmvif->mvm->mutex);
if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvmvif->mvm->status)) {
sta_id = iwl_mvm_find_free_sta_id(mvmvif->mvm, mvmvif->mac_role);
} else {
sta_id = mvm_sta->sta_id;
}
if (sta_id == IWL_MVM_INVALID_STA) {
return ZX_ERR_NO_RESOURCES;
}
mtx_init(&mvm_sta->lock, mtx_plain);
#if 0 // NEEDS_PORTING
/* if this is a HW restart re-alloc existing queues */
if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
struct iwl_mvm_int_sta tmp_sta = {
.sta_id = sta_id,
.type = mvm_sta->sta_type,
};
/*
* First add an empty station since allocating
* a queue requires a valid station
*/
ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, mvmvif->id, mvmvif->color);
if (ret) {
goto err;
}
iwl_mvm_realloc_queues_after_restart(mvm, sta);
sta_update = true;
sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
goto update_fw;
}
#endif // NEEDS_PORTING
mvm_sta->sta_id = sta_id;
mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
mvm_sta->mvmvif = mvmvif;
if (!mvmvif->mvm->trans->cfg->gen2) {
mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
} else {
mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
}
mvm_sta->tx_protection = 0;
mvm_sta->tt_tx_protection = false;
#if 1 // NEEDS_PORTING
mvm_sta->sta_type = IWL_STA_LINK;
#else // NEEDS_PORTING
mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
#endif // NEEDS_PORTING
/* HW restart, don't assume the memory has been zeroed */
mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
mvm_sta->tfd_queue_msk = 0;
/* for HW restart - reset everything but the sequence number */
for (size_t i = 0; i <= IWL_MAX_TID_COUNT; i++) {
uint16_t 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;
/*
* Mark all queues for this STA as unallocated and defer TX
* frames until the queue is allocated
*/
mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
}
for (size_t i = 0; i < ARRAY_SIZE(mvm_sta->txq); i++) {
struct iwl_mvm_txq* mvmtxq = mvm_sta->txq[i];
mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
list_initialize(&mvmtxq->list);
mtx_init(&mvmtxq->tx_path_lock, mtx_plain);
}
mvm_sta->agg_tids = 0;
#if 0 // NEEDS_PORTING
if (iwl_mvm_has_new_rx_api(mvm) && !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
int q;
struct iwl_mvm_rxq_dup_data* dup_data =
kcalloc(mvm->trans->num_rx_queues, sizeof(*dup_data), GFP_KERNEL);
if (!dup_data) {
return -ENOMEM;
}
/*
* Initialize all the last_seq values to 0xffff which can never
* compare equal to the frame's seq_ctrl in the check in
* iwl_mvm_is_dup() since the lower 4 bits are the fragment
* number and fragmented packets don't reach that function.
*
* This thus allows receiving a packet with seqno 0 and the
* retry bit set as the very first packet on a new TID.
*/
for (q = 0; q < mvm->trans->num_rx_queues; q++) {
memset(dup_data[q].last_seq, 0xff, sizeof(dup_data[q].last_seq));
}
mvm_sta->dup_data = dup_data;
}
if (!iwl_mvm_has_new_tx_api(mvm)) {
ret = iwl_mvm_reserve_sta_stream(mvm, sta, ieee80211_vif_type_p2p(vif));
if (ret) {
goto err;
}
}
/*
* if rs is registered with mac80211, then "add station" will be handled
* via the corresponding ops, otherwise need to notify rate scaling here
*/
if (iwl_mvm_has_tlc_offload(mvm)) {
iwl_mvm_rs_add_sta(mvm, mvm_sta);
}
#endif // NEEDS_PORTING
iwl_mvm_toggle_tx_ant(mvmvif->mvm, &mvm_sta->tx_ant);
#if 0 // NEEDS_PORTING
update_fw:
#endif // NEEDS_PORTING
ret = iwl_mvm_sta_send_to_fw(mvmvif->mvm, mvm_sta, sta_update, sta_flags);
if (ret != ZX_OK) {
IWL_ERR(mvmvif, "Add sta cannot send the command to firmware: %s\n", zx_status_get_string(ret));
goto err;
}
if (mvmvif->mac_role == WLAN_INFO_MAC_ROLE_CLIENT) {
if (!mvm_sta->tdls) {
if (mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
IWL_WARN(mvmvif, "mvmvif->ap_sta_id is invalid\n");
}
mvmvif->ap_sta_id = sta_id;
} else {
if (mvmvif->ap_sta_id == IWL_MVM_INVALID_STA) {
IWL_WARN(mvmvif, "TDLS mvmvif->ap_sta_id is invalid\n");
}
}
}
mvmvif->mvm->fw_id_to_mac_id[sta_id] = mvm_sta;
ret = ZX_OK;
err:
return ret;
}
struct iwl_mvm_sta* iwl_mvm_find_sta_by_addr(struct iwl_mvm* mvm, uint8_t addr[ETH_ALEN]) {
struct iwl_mvm_sta* sta = NULL;
iwl_assert_lock_held(&mvm->mutex);
for (size_t sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) {
sta = mvm->fw_id_to_mac_id[sta_id];
if (sta == NULL) {
continue;
}
if (memcmp(sta->addr, addr, sizeof(sta->addr)) == 0) {
return sta;
}
}
return NULL;
}
zx_status_t iwl_mvm_drain_sta(struct iwl_mvm* mvm, struct iwl_mvm_sta* mvmsta, bool drain) {
struct iwl_mvm_add_sta_cmd cmd = {};
zx_status_t ret;
uint32_t status;
iwl_assert_lock_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 != ZX_OK) {
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 = ZX_ERR_IO;
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 zx_status_t iwl_mvm_rm_sta_common(struct iwl_mvm* mvm, uint8_t sta_id) {
struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
.sta_id = sta_id,
};
zx_status_t ret;
iwl_assert_lock_held(&mvm->mutex);
struct iwl_mvm_sta* mvm_sta = mvm->fw_id_to_mac_id[sta_id];
/* Note: internal stations are marked as error values */
if (!mvm_sta) {
IWL_ERR(mvm, "Invalid station id\n");
return ZX_ERR_INVALID_ARGS;
}
ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, sizeof(rm_sta_cmd), &rm_sta_cmd);
if (ret != ZX_OK) {
IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
return ret;
}
return ZX_OK;
}
static void iwl_mvm_disable_sta_queues(struct iwl_mvm* mvm, struct iwl_mvm_sta* mvm_sta) {
unsigned int i;
iwl_assert_lock_held(&mvm->mutex);
for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) {
continue;
}
iwl_mvm_disable_txq(mvm, mvm_sta, mvm_sta->tid_data[i].txq_id, i, 0);
mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
}
for (i = 0; i < ARRAY_SIZE(mvm_sta->txq); i++) {
struct iwl_mvm_txq* mvmtxq = mvm_sta->txq[i];
mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
}
}
zx_status_t iwl_mvm_wait_sta_queues_empty(struct iwl_mvm* mvm, struct iwl_mvm_sta* mvm_sta) {
for (size_t i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
uint16_t txq_id;
zx_status_t ret;
mtx_lock(&mvm_sta->lock);
txq_id = mvm_sta->tid_data[i].txq_id;
mtx_unlock(&mvm_sta->lock);
if (txq_id == IWL_MVM_INVALID_QUEUE) {
continue;
}
ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
if (ret != ZX_OK) {
return ret;
}
}
return ZX_OK;
}
zx_status_t iwl_mvm_rm_sta(struct iwl_mvm_vif* mvmvif, struct iwl_mvm_sta* mvm_sta) {
struct iwl_mvm* mvm = mvmvif->mvm;
uint8_t sta_id = mvm_sta->sta_id;
zx_status_t ret;
iwl_assert_lock_held(&mvm->mutex);
#if 0 // // NEEDS_PORTING
if (iwl_mvm_has_new_rx_api(mvm)) {
kfree(mvm_sta->dup_data);
}
#endif // NEEDS_PORTING
ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
if (ret != ZX_OK) {
IWL_ERR(mvmvif, "Error occurs while marking station draining\n");
return ret;
}
/* flush its queues here since we are freeing mvm_sta */
ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
if (ret != ZX_OK) {
IWL_ERR(mvmvif, "Error occurs while flushing station\n");
return ret;
}
if (iwl_mvm_has_new_tx_api(mvm)) {
ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
} else {
uint32_t q_mask = mvm_sta->tfd_queue_msk;
ret = iwl_trans_wait_tx_queues_empty(mvm->trans, q_mask);
}
if (ret != ZX_OK) {
IWL_ERR(mvmvif, "Error occurs while waiting for Tx queue empty\n");
return ret;
}
ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
iwl_mvm_disable_sta_queues(mvm, mvm_sta);
/* If there is a TXQ still marked as reserved - free it */
if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
uint8_t reserved_txq = mvm_sta->reserved_queue;
enum iwl_mvm_queue_status* status;
/*
* 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
*/
status = &mvm->queue_info[reserved_txq].status;
if ((*status != IWL_MVM_QUEUE_RESERVED) && (*status != IWL_MVM_QUEUE_FREE)) {
IWL_ERR(mvmvif, "sta_id %d reserved txq %d status %d", sta_id, reserved_txq, *status);
return ZX_ERR_INVALID_ARGS;
}
*status = IWL_MVM_QUEUE_FREE;
}
if (mvmvif->mac_role == WLAN_INFO_MAC_ROLE_CLIENT && mvmvif->ap_sta_id == sta_id) {
/* if associated - we can't remove the AP STA now */
if (mvmvif->bss_conf.assoc) {
IWL_WARN(mvmvif, "Ignore the AP station removal since it is still associated\n");
return ret;
}
/* unassoc - go ahead - remove the AP STA now */
mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
/* clear d0i3_ap_sta_id if no longer relevant */
if (mvm->d0i3_ap_sta_id == sta_id) {
mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
}
}
#if 0 // NEEDS_PORTING
/*
* 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_INVALID_STA;
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);
spin_unlock_bh(&mvm_sta->lock);
#endif // NEEDS_PORTING
ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
return ret;
}
#if 0 // NEEDS_PORTING
int iwl_mvm_rm_sta_id(struct iwl_mvm* mvm, struct ieee80211_vif* vif, uint8_t sta_id) {
int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
iwl_assert_lock_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, uint32_t qmask,
enum nl80211_iftype iftype, enum iwl_sta_type type) {
if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || sta->sta_id == IWL_MVM_INVALID_STA) {
sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) {
return -ENOSPC;
}
}
sta->tfd_queue_msk = qmask;
sta->type = type;
/* 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;
}
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_INVALID_STA;
}
static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm* mvm, uint16_t* queue, uint8_t sta_id,
uint8_t fifo) {
unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? mvm->cfg->base_params->wd_timeout
: IWL_WATCHDOG_DISABLED;
if (iwl_mvm_has_new_tx_api(mvm)) {
int tvqm_queue = iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT, wdg_timeout);
*queue = tvqm_queue;
} else {
struct iwl_trans_txq_scd_cfg cfg = {
.fifo = fifo,
.sta_id = sta_id,
.tid = IWL_MAX_TID_COUNT,
.aggregate = false,
.frame_limit = IWL_FRAME_LIMIT,
};
iwl_mvm_enable_txq(mvm, NULL, *queue, 0, &cfg, wdg_timeout);
}
}
int iwl_mvm_add_aux_sta(struct iwl_mvm* mvm) {
int ret;
iwl_assert_lock_held(&mvm->mutex);
/* 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, IWL_STA_AUX_ACTIVITY);
if (ret) {
return ret;
}
/* Map Aux queue to fifo - needs to happen before adding Aux station */
if (!iwl_mvm_has_new_tx_api(mvm))
iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, mvm->aux_sta.sta_id, IWL_MVM_TX_FIFO_MCAST);
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;
}
/*
* For 22000 firmware and on we cannot add queue to a station unknown
* to firmware so enable queue here - after the station was added
*/
if (iwl_mvm_has_new_tx_api(mvm))
iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, mvm->aux_sta.sta_id, IWL_MVM_TX_FIFO_MCAST);
return 0;
}
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);
int ret;
iwl_assert_lock_held(&mvm->mutex);
/* Map snif queue to fifo - must happen before adding snif station */
if (!iwl_mvm_has_new_tx_api(mvm))
iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, mvm->snif_sta.sta_id, IWL_MVM_TX_FIFO_BE);
ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, mvmvif->id, 0);
if (ret) {
return ret;
}
/*
* For 22000 firmware and on we cannot add queue to a station unknown
* to firmware so enable queue here - after the station was added
*/
if (iwl_mvm_has_new_tx_api(mvm))
iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, mvm->snif_sta.sta_id, IWL_MVM_TX_FIFO_BE);
return 0;
}
int iwl_mvm_rm_snif_sta(struct iwl_mvm* mvm, struct ieee80211_vif* vif) {
int ret;
iwl_assert_lock_held(&mvm->mutex);
iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0);
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) {
iwl_assert_lock_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 uint8_t _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
const uint8_t* baddr = _baddr;
int queue;
int ret;
unsigned int wdg_timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
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,
};
iwl_assert_lock_held(&mvm->mutex);
if (!iwl_mvm_has_new_tx_api(mvm)) {
if (vif->type == NL80211_IFTYPE_AP || vif->type == NL80211_IFTYPE_ADHOC) {
queue = mvm->probe_queue;
} else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
queue = mvm->p2p_dev_queue;
} else if (WARN(1, "Missing required TXQ for adding bcast STA\n")) {
return -EINVAL;
}
bsta->tfd_queue_msk |= BIT(queue);
iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
}
if (vif->type == NL80211_IFTYPE_ADHOC) {
baddr = vif->bss_conf.bssid;
}
if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) {
return -ENOSPC;
}
ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, mvmvif->id, mvmvif->color);
if (ret) {
return ret;
}
/*
* For 22000 firmware and on we cannot add queue to a station unknown
* to firmware so enable queue here - after the station was added
*/
if (iwl_mvm_has_new_tx_api(mvm)) {
queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, IWL_MAX_TID_COUNT, wdg_timeout);
if (vif->type == NL80211_IFTYPE_AP || vif->type == NL80211_IFTYPE_ADHOC) {
mvm->probe_queue = queue;
} else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
mvm->p2p_dev_queue = queue;
}
}
return 0;
}
static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm* mvm, struct ieee80211_vif* vif) {
struct iwl_mvm_vif* mvmvif = iwl_mvm_vif_from_mac80211(vif);
int queue;
iwl_assert_lock_held(&mvm->mutex);
iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
switch (vif->type) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_ADHOC:
queue = mvm->probe_queue;
break;
case NL80211_IFTYPE_P2P_DEVICE:
queue = mvm->p2p_dev_queue;
break;
default:
WARN(1, "Can't free bcast queue on vif type %d\n", vif->type);
return;
}
iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0);
if (iwl_mvm_has_new_tx_api(mvm)) {
return;
}
WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
}
/* 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;
iwl_assert_lock_held(&mvm->mutex);
iwl_mvm_free_bcast_sta_queues(mvm, vif);
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);
iwl_assert_lock_held(&mvm->mutex);
return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, ieee80211_vif_type_p2p(vif),
IWL_STA_GENERAL_PURPOSE);
}
/* 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_p2p_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;
iwl_assert_lock_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_p2p_bcast_sta(struct iwl_mvm* mvm, struct ieee80211_vif* vif) {
int ret;
iwl_assert_lock_held(&mvm->mutex);
ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
iwl_mvm_dealloc_bcast_sta(mvm, vif);
return ret;
}
/*
* Allocate a new station entry for the multicast station to the given vif,
* and send it to the FW.
* Note that each AP/GO mac should have its own multicast station.
*
* @mvm: the mvm component
* @vif: the interface to which the multicast station is added
*/
int iwl_mvm_add_mcast_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* msta = &mvmvif->mcast_sta;
static const uint8_t _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
const uint8_t* maddr = _maddr;
struct iwl_trans_txq_scd_cfg cfg = {
.fifo = IWL_MVM_TX_FIFO_MCAST,
.sta_id = msta->sta_id,
.tid = 0,
.aggregate = false,
.frame_limit = IWL_FRAME_LIMIT,
};
unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
int ret;
iwl_assert_lock_held(&mvm->mutex);
if (WARN_ON(vif->type != NL80211_IFTYPE_AP && vif->type != NL80211_IFTYPE_ADHOC)) {
return -ENOTSUPP;
}
/*
* In IBSS, ieee80211_check_queues() sets the cab_queue to be
* invalid, so make sure we use the queue we want.
* Note that this is done here as we want to avoid making DQA
* changes in mac80211 layer.
*/
if (vif->type == NL80211_IFTYPE_ADHOC) {
mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
}
/*
* While in previous FWs we had to exclude cab queue from TFD queue
* mask, now it is needed as any other queue.
*/
if (!iwl_mvm_has_new_tx_api(mvm) &&
fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, timeout);
msta->tfd_queue_msk |= BIT(mvmvif->cab_queue);
}
ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, mvmvif->id, mvmvif->color);
if (ret) {
iwl_mvm_dealloc_int_sta(mvm, msta);
return ret;
}
/*
* Enable cab queue after the ADD_STA command is sent.
* This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
* command with unknown station id, and for FW that doesn't support
* station API since the cab queue is not included in the
* tfd_queue_mask.
*/
if (iwl_mvm_has_new_tx_api(mvm)) {
int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 0, timeout);
mvmvif->cab_queue = queue;
} else if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, timeout);
}
if (mvmvif->ap_wep_key) {
uint8_t key_offset = iwl_mvm_set_fw_key_idx(mvm);
if (key_offset == STA_KEY_IDX_INVALID) {
return -ENOSPC;
}
ret = iwl_mvm_send_sta_key(mvm, mvmvif->mcast_sta.sta_id, mvmvif->ap_wep_key, 1, 0, NULL, 0,
key_offset, 0);
if (ret) {
return ret;
}
}
if (mvmvif->ap_wep_key) {
uint8_t key_offset = iwl_mvm_set_fw_key_idx(mvm);
if (key_offset == STA_KEY_IDX_INVALID) {
return -ENOSPC;
}
ret = iwl_mvm_send_sta_key(mvm, mvmvif->mcast_sta.sta_id, mvmvif->ap_wep_key, 1, 0, NULL, 0,
key_offset, 0);
if (ret) {
return ret;
}
}
return 0;
}
/*
* 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_mcast_sta(struct iwl_mvm* mvm, struct ieee80211_vif* vif) {
struct iwl_mvm_vif* mvmvif = iwl_mvm_vif_from_mac80211(vif);
int ret;
iwl_assert_lock_held(&mvm->mutex);
iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0);
ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
if (ret) {
IWL_WARN(mvm, "Failed sending remove station\n");
}
return ret;
}
#define IWL_MAX_RX_BA_SESSIONS 16
static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm* mvm, uint8_t 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];
struct iwl_mvm_reorder_buf_entry* entries = &data->entries[i * data->entries_per_queue];
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(&entries[j].e.frames);
}
/*
* 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, struct iwl_mvm_baid_data* data,
uint16_t ssn, uint16_t 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];
struct iwl_mvm_reorder_buf_entry* entries = &data->entries[i * data->entries_per_queue];
int j;
reorder_buf->num_stored = 0;
reorder_buf->head_sn = ssn;
reorder_buf->buf_size = buf_size;
/* rx reorder timer */
timer_setup(&reorder_buf->reorder_timer, iwl_mvm_reorder_timer_expired, 0);
spin_lock_init(&reorder_buf->lock);
reorder_buf->mvm = mvm;
reorder_buf->queue = i;
reorder_buf->valid = false;
for (j = 0; j < reorder_buf->buf_size; j++) {
__skb_queue_head_init(&entries[j].e.frames);
}
}
}
int iwl_mvm_sta_rx_agg(struct iwl_mvm* mvm, struct ieee80211_sta* sta, int tid, uint16_t ssn,
bool start, uint16_t buf_size, uint16_t 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;
uint32_t status;
iwl_assert_lock_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) {
uint16_t reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
/* sparse doesn't like the __align() so don't check */
#ifndef __CHECKER__
/*
* The division below will be OK if either the cache line size
* can be divided by the entry size (ALIGN will round up) or if
* if the entry size can be divided by the cache line size, in
* which case the ALIGN() will do nothing.
*/
BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
#endif
/*
* Upward align the reorder buffer size to fill an entire cache
* line for each queue, to avoid sharing cache lines between
* different queues.
*/
reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
/*
* 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 * reorder_buf_size, GFP_KERNEL);
if (!baid_data) {
return -ENOMEM;
}
/*
* This division is why we need the above BUILD_BUG_ON(),
* if that doesn't hold then this will not be right.
*/
baid_data->entries_per_queue = reorder_buf_size / sizeof(baid_data->entries[0]);
}
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 = (uint8_t)tid;
cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
cmd.rx_ba_window = cpu_to_le16(buf_size);
} else {
cmd.remove_immediate_ba_tid = (uint8_t)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) {
uint8_t 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 = (uint8_t)((status & IWL_ADD_STA_BAID_MASK) >> IWL_ADD_STA_BAID_SHIFT);
baid_data->baid = baid;
baid_data->timeout = timeout;
baid_data->last_rx = jiffies;
baid_data->rcu_ptr = &mvm->baid_map[baid];
timer_setup(&baid_data->session_timer, iwl_mvm_rx_agg_session_expired, 0);
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, 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 {
uint8_t 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, uint8_t queue,
bool start) {
struct iwl_mvm_sta* mvm_sta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_add_sta_cmd cmd = {};
int ret;
uint32_t status;
iwl_assert_lock_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 */
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;
if (!iwl_mvm_has_new_tx_api(mvm)) {
cmd.modify_mask = STA_MODIFY_QUEUES;
}
cmd.modify_mask |= 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;
}
#endif // NEEDS_PORTING
const uint8_t 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 */
};
#if 0 // NEEDS_PORTING
static const uint8_t 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, uint16_t tid, uint16_t* ssn) {
struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data* tid_data;
uint16_t normalized_ssn;
uint16_t txq_id;
int ret;
if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) {
return -EINVAL;
}
if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
mvmsta->tid_data[tid].state);
return -ENXIO;
}
iwl_assert_lock_held(&mvm->mutex);
if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && iwl_mvm_has_new_tx_api(mvm)) {
uint8_t ac = tid_to_mac80211_ac[tid];
ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
if (ret) {
return ret;
}
}
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;
}
/*
* Note the possible cases:
* 1. An enabled TXQ - TXQ needs to become agg'ed
* 2. The TXQ hasn't yet been enabled, so find a free one and mark
* it as reserved
*/
txq_id = mvmsta->tid_data[tid].txq_id;
if (txq_id == IWL_MVM_INVALID_QUEUE) {
ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, IWL_MVM_DQA_MIN_DATA_QUEUE,
IWL_MVM_DQA_MAX_DATA_QUEUE);
if (ret < 0) {
IWL_ERR(mvm, "Failed to allocate agg queue\n");
goto out;
}
txq_id = ret;
/* TXQ hasn't yet been enabled, so mark it only as reserved */
mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
} else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
ret = -ENXIO;
IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", tid, IWL_MAX_HW_QUEUES - 1);
goto out;
} else if (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 out;
}
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);
/*
* In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
* to align the wrap around of ssn so we compare relevant values.
*/
normalized_ssn = tid_data->ssn;
if (mvm->trans->cfg->gen2) {
normalized_ssn &= 0xff;
}
if (normalized_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;
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, uint16_t tid, uint16_t 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;
uint16_t ssn;
struct iwl_trans_txq_scd_cfg cfg = {
.sta_id = mvmsta->sta_id,
.tid = tid,
.frame_limit = buf_size,
.aggregate = true,
};
/*
* When FW supports TLC_OFFLOAD, it also implements Tx aggregation
* manager, so this function should never be called in this case.
*/
if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) {
return -EINVAL;
}
BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) != IWL_MAX_TID_COUNT);
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);
if (iwl_mvm_has_new_tx_api(mvm)) {
/*
* If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
* would have failed, so if we are here there is no need to
* allocate a queue.
* However, if aggregation size is different than the default
* size, the scheduler should be reconfigured.
* We cannot do this with the new TX API, so return unsupported
* for now, until it will be offloaded to firmware..
* Note that if SCD default value changes - this condition
* should be updated as well.
*/
if (buf_size < IWL_FRAME_LIMIT) {
return -ENOTSUPP;
}
ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
if (ret) {
return -EIO;
}
goto out;
}
cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
queue_status = mvm->queue_info[queue].status;
/* 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 < IWL_FRAME_LIMIT) {
/*
* If reconfiguring an existing queue, it first must be
* drained
*/
ret = iwl_trans_wait_tx_queues_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, sta, queue, 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 */
mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
out:
/*
* 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.rs_drv.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.rs_drv.lq, false);
}
static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm* mvm, struct iwl_mvm_sta* mvmsta,
struct iwl_mvm_tid_data* tid_data) {
uint16_t txq_id = tid_data->txq_id;
iwl_assert_lock_held(&mvm->mutex);
if (iwl_mvm_has_new_tx_api(mvm)) {
return;
}
/*
* 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;
tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
}
}
int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm* mvm, struct ieee80211_vif* vif,
struct ieee80211_sta* sta, uint16_t tid) {
struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data* tid_data = &mvmsta->tid_data[tid];
uint16_t 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);
iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
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);
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);
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 */
iwl_assert_lock_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, uint16_t tid) {
struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data* tid_data = &mvmsta->tid_data[tid];
uint16_t 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);
iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
if (old_state >= IWL_AGG_ON) {
iwl_mvm_drain_sta(mvm, mvmsta, true);
if (iwl_mvm_has_new_tx_api(mvm)) {
if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, BIT(tid), 0)) {
IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
}
iwl_trans_wait_txq_empty(mvm->trans, txq_id);
} else {
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_queues_empty(mvm->trans, BIT(txq_id));
}
iwl_mvm_drain_sta(mvm, mvmsta, false);
iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
}
return 0;
}
#endif // NEEDS_PORTING
static int iwl_mvm_set_fw_key_idx(struct iwl_mvm* mvm) {
int i, max = -1, max_offs = -1;
iwl_assert_lock_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;
}
#if 0 // NEEDS_PORTING
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_INVALID_STA) {
uint8_t 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;
}
#endif // NEEDS_PORTING
static zx_status_t iwl_mvm_send_sta_key(struct iwl_mvm* mvm, uint32_t sta_id,
const struct iwl_mvm_sta_key_conf* key, bool mcast,
uint32_t tkip_iv32, uint16_t* tkip_p1k, uint32_t cmd_flags,
uint8_t key_offset, bool mfp) {
union {
struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
struct iwl_mvm_add_sta_key_cmd cmd;
} u = {};
__le16 key_flags;
zx_status_t ret = ZX_OK;
uint32_t status;
uint16_t keyidx;
int size;
// This feature path requires support for setting a TX packet number, which we do not have at the
// moment in Fuchsia.
ZX_DEBUG_ASSERT(!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TKIP_MIC_KEYS));
if (sta_id == IWL_MVM_INVALID_STA) {
return ZX_ERR_INVALID_ARGS;
}
keyidx = (key->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 (key->cipher_type) {
case CIPHER_SUITE_TYPE_CCMP_128:
key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
memcpy(u.cmd.common.key, key->key, key->keylen);
break;
default:
return ZX_ERR_NOT_SUPPORTED;
}
if (mcast) {
key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
}
if (mfp) {
key_flags |= cpu_to_le16(STA_KEY_MFP);
}
u.cmd.common.key_offset = key_offset;
u.cmd.common.key_flags = key_flags;
u.cmd.common.sta_id = sta_id;
size = sizeof(u.cmd_v1);
status = ADD_STA_SUCCESS;
if (cmd_flags & CMD_ASYNC) {
ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, &u.cmd);
} else {
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, &status);
}
switch (status) {
case ADD_STA_SUCCESS:
IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
break;
default:
ret = ZX_ERR_IO;
IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
break;
}
return ret;
}
static int iwl_mvm_send_sta_igtk(struct iwl_mvm* mvm, const struct iwl_mvm_sta_key_conf* keyconf,
uint8_t 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->key_type == WLAN_KEY_TYPE_PAIRWISE) ||
(keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
(keyconf->cipher_type != CIPHER_SUITE_TYPE_BIP_CMAC_128 &&
keyconf->cipher_type != CIPHER_SUITE_TYPE_BIP_GMAC_128 &&
keyconf->cipher_type != CIPHER_SUITE_TYPE_BIP_GMAC_256))) {
return ZX_ERR_INVALID_ARGS;
}
if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
keyconf->cipher_type != CIPHER_SUITE_TYPE_BIP_CMAC_128)) {
return ZX_ERR_INVALID_ARGS;
}
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 {
switch (keyconf->cipher_type) {
case CIPHER_SUITE_TYPE_BIP_CMAC_128:
igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
break;
case CIPHER_SUITE_TYPE_BIP_GMAC_128:
case CIPHER_SUITE_TYPE_BIP_GMAC_256:
igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
break;
default:
return ZX_ERR_INVALID_ARGS;
}
memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
if (keyconf->cipher_type == CIPHER_SUITE_TYPE_BIP_GMAC_256) {
igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
}
igtk_cmd.receive_seq_cnt = cpu_to_le64(keyconf->rx_seq);
}
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);
}
#if 0 // NEEDS_PORTING
static inline uint8_t* 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_INVALID_STA) {
uint8_t 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;
}
#endif // NEEDS_PORTING
static zx_status_t __iwl_mvm_set_sta_key(struct iwl_mvm* mvm, struct iwl_mvm_vif* mvmvif,
struct iwl_mvm_sta* mvmsta,
const struct iwl_mvm_sta_key_conf* keyconf,
uint8_t key_offset, bool mcast) {
zx_status_t ret = ZX_OK;
uint32_t sta_id;
// Not supported for Fuchsia paths currently.
bool mfp = false;
if (mvmsta) {
sta_id = mvmsta->sta_id;
} else if (mvmvif->mac_role == WLAN_INFO_MAC_ROLE_AP &&
keyconf->key_type != WLAN_KEY_TYPE_PAIRWISE) {
sta_id = mvmvif->mcast_sta.sta_id;
} else {
IWL_ERR(mvm, "Failed to find station id\n");
return ZX_ERR_INVALID_ARGS;
}
switch (keyconf->cipher_type) {
case CIPHER_SUITE_TYPE_CCMP_128:
ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 0, NULL, 0, key_offset, mfp);
break;
default:
return ZX_ERR_NOT_SUPPORTED;
}
return ret;
}
static zx_status_t __iwl_mvm_remove_sta_key(struct iwl_mvm* mvm, uint8_t sta_id,
const struct iwl_mvm_sta_key_conf* keyconf,
uint8_t key_offset, bool mcast) {
union {
struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
struct iwl_mvm_add_sta_key_cmd cmd;
} u = {};
bool new_api = fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
__le16 key_flags;
zx_status_t ret = ZX_OK;
int size;
uint32_t status;
/* This is a valid situation for GTK removal */
if (sta_id == IWL_MVM_INVALID_STA) {
return 0;
}
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);
}
/*
* The fields assigned here are in the same location at the start
* of the command, so we can do this union trick.
*/
u.cmd.common.key_flags = key_flags;
u.cmd.common.key_offset = key_offset;
u.cmd.common.sta_id = sta_id;
size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, &status);
switch (status) {
case ADD_STA_SUCCESS:
IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
break;
default:
ret = ZX_ERR_IO;
IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
break;
}
return ret;
}
zx_status_t iwl_mvm_set_sta_key(struct iwl_mvm* mvm, struct iwl_mvm_vif* mvmvif,
struct iwl_mvm_sta* mvmsta,
const struct iwl_mvm_sta_key_conf* keyconf, uint8_t key_offset) {
bool mcast = keyconf->key_type != WLAN_KEY_TYPE_PAIRWISE;
uint8_t sta_id = IWL_MVM_INVALID_STA;
zx_status_t ret = ZX_OK;
static const uint8_t __maybe_unused zero_addr[ETH_ALEN] = {0};
iwl_assert_lock_held(&mvm->mutex);
if (mvmvif->mac_role != WLAN_INFO_MAC_ROLE_AP || keyconf->key_type == WLAN_KEY_TYPE_PAIRWISE) {
sta_id = mvmsta->sta_id;
} else {
sta_id = mvmvif->mcast_sta.sta_id;
}
if (keyconf->cipher_type == CIPHER_SUITE_TYPE_BIP_CMAC_128 ||
keyconf->cipher_type == CIPHER_SUITE_TYPE_BIP_GMAC_128 ||
keyconf->cipher_type == CIPHER_SUITE_TYPE_BIP_GMAC_256) {
ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
goto end;
}
// TODO(fxbug.dev/86728): remove the WPA2 key workaround
key_offset = keyconf->keyidx;
if (mvm->active_key_list[key_offset].keylen) {
// delete the last key if present
if (iwl_mvm_remove_sta_key(mvmvif, mvmsta, &mvm->active_key_list[key_offset]) != ZX_OK) {
IWL_WARN(mvm, "Unable to delete key at offset %d", key_offset);
}
memset(&mvm->active_key_list[key_offset], 0, sizeof(struct iwl_mvm_sta_key_conf));
}
/* 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 ZX_ERR_NO_SPACE;
}
}
ret = __iwl_mvm_set_sta_key(mvm, mvmvif, mvmsta, keyconf, key_offset, mcast);
if (ret != ZX_OK) {
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_type == CIPHER_SUITE_TYPE_WEP_40 ||
keyconf->cipher_type == CIPHER_SUITE_TYPE_WEP_104) &&
mvmsta) {
ret = __iwl_mvm_set_sta_key(mvm, mvmvif, mvmsta, keyconf, key_offset, !mcast);
if (ret != ZX_OK) {
__iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, key_offset, mcast);
goto end;
}
}
__set_bit(key_offset, mvm->fw_key_table);
// TODO(fxbug.dev/86728): remove the WPA2 key workaround
// Save the keyconf in the driver key table for easier deleteion
mvm->active_key_list[key_offset] = *keyconf;
end:
IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%zu idx=%d mvmsta=%pM ret=%d\n", keyconf->cipher_type,
keyconf->keylen, keyconf->keyidx, mvmsta ? mvmsta->addr : zero_addr, ret);
return ret;
}
zx_status_t iwl_mvm_remove_sta_key(struct iwl_mvm_vif* mvmvif, struct iwl_mvm_sta* mvm_sta,
struct iwl_mvm_sta_key_conf* keyconf) {
struct iwl_mvm* mvm = mvmvif->mvm;
bool mcast = keyconf->key_type != WLAN_KEY_TYPE_PAIRWISE;
uint8_t sta_id = IWL_MVM_INVALID_STA;
// TODO(fxbug.dev/86728): remove the WPA2 key workaround
int hw_key_idx = keyconf->keyidx;
int i;
zx_status_t ret;
iwl_assert_lock_held(&mvm->mutex);
sta_id = mvm_sta->sta_id;
IWL_INFO(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id);
#if 0 // NEEDS_PORTING
if (mvm_sta && (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);
}
#endif // NEEDS_PORTING
if (!test_and_clear_bit(hw_key_idx, mvm->fw_key_table)) {
IWL_ERR(mvm, "offset %d not used in fw key table.\n", hw_key_idx);
return ZX_ERR_BAD_HANDLE;
}
/* 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[hw_key_idx] = 0;
if (!mvm_sta) {
IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
return ZX_OK;
}
ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, hw_key_idx, mcast);
if (ret != ZX_OK) {
return ret;
}
/* delete WEP key twice to get rid of (now useless) offset */
if (keyconf->cipher_type == CIPHER_SUITE_TYPE_WEP_40 ||
keyconf->cipher_type == CIPHER_SUITE_TYPE_WEP_104) {
ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, hw_key_idx, !mcast);
}
return ret;
}
#if 0 // NEEDS_PORTING
void iwl_mvm_update_tkip_key(struct iwl_mvm* mvm, struct ieee80211_vif* vif,
struct ieee80211_key_conf* keyconf, struct ieee80211_sta* sta,
uint32_t iv32, uint16_t* phase1key) {
struct iwl_mvm_sta* mvm_sta;
bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
bool mfp = sta ? sta->mfp : false;
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->sta_id, keyconf, mcast, iv32, phase1key, CMD_ASYNC,
keyconf->hw_key_idx, mfp);
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, uint16_t cnt,
uint16_t tids, bool more_data, bool single_sta_queue) {
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 or dqa queues then check
* if all the queues that we're releasing frames from, combined, 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 (single_sta_queue) {
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;
uint16_t n_queued;
tid_data = &mvmsta->tid_data[tid];
n_queued = iwl_mvm_tid_queued(mvm, 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 |= STA_SLEEP_STATE_MOREDATA;
}
if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
mvmsta->next_status_eosp = true;
cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
} else {
cmd.sleep_state_flags |= 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;
uint32_t 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();
}
#endif // NEEDS_PORTING
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),
};
zx_status_t ret =
iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, iwl_mvm_add_sta_cmd_size(mvm), &cmd);
if (ret != ZX_OK) {
IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
}
#if 0 // NEEDS_PORTING
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 */
ieee80211_sta_block_awake(mvm->hw, sta, disable);
iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
spin_unlock_bh(&mvm_sta->lock);
}
static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm* mvm, struct iwl_mvm_vif* mvmvif,
struct iwl_mvm_int_sta* sta, bool disable) {
uint32_t id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
struct iwl_mvm_add_sta_cmd cmd = {
.add_modify = STA_MODE_MODIFY,
.sta_id = sta->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(id),
};
int ret;
ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 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_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;
iwl_assert_lock_held(&mvm->mutex);
/* Block/unblock all the stations of the given mvmvif */
for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); 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);
}
if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
return;
}
/* Need to block/unblock also multicast station */
if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) {
iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, &mvmvif->mcast_sta, disable);
}
/*
* Only unblock the broadcast station (FW blocks it for immediate
* quiet, not the driver)
*/
if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) {
iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, &mvmvif->bcast_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();
}
uint16_t iwl_mvm_tid_queued(struct iwl_mvm* mvm, struct iwl_mvm_tid_data* tid_data) {
uint16_t sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
/*
* In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
* to align the wrap around of ssn so we compare relevant values.
*/
if (mvm->trans->cfg->gen2) {
sn &= 0xff;
}
return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
}
#endif // NEEDS_PORTING