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OpenCloudOS-Kernel/drivers/net/wireless/intel/iwlwifi/mvm/sta.c

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/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/
#include <net/mac80211.h>
#include "mvm.h"
#include "sta.h"
#include "rs.h"
static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
enum nl80211_iftype iftype)
{
int sta_id;
u32 reserved_ids = 0;
BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
lockdep_assert_held(&mvm->mutex);
/* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
if (iftype != NL80211_IFTYPE_STATION)
reserved_ids = BIT(0);
/* Don't take rcu_read_lock() since we are protected by mvm->mutex */
for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
if (BIT(sta_id) & reserved_ids)
continue;
if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex)))
return sta_id;
}
return IWL_MVM_STATION_COUNT;
}
/* send station add/update command to firmware */
int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
bool update)
{
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_add_sta_cmd add_sta_cmd = {
.sta_id = mvm_sta->sta_id,
.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
.add_modify = update ? 1 : 0,
.station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
STA_FLG_MIMO_EN_MSK),
.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
};
int ret;
u32 status;
u32 agg_size = 0, mpdu_dens = 0;
if (!update) {
add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
}
switch (sta->bandwidth) {
case IEEE80211_STA_RX_BW_160:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
/* fall through */
case IEEE80211_STA_RX_BW_80:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
/* fall through */
case IEEE80211_STA_RX_BW_40:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
/* fall through */
case IEEE80211_STA_RX_BW_20:
if (sta->ht_cap.ht_supported)
add_sta_cmd.station_flags |=
cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
break;
}
switch (sta->rx_nss) {
case 1:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
break;
case 2:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
break;
case 3 ... 8:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
break;
}
switch (sta->smps_mode) {
case IEEE80211_SMPS_AUTOMATIC:
case IEEE80211_SMPS_NUM_MODES:
WARN_ON(1);
break;
case IEEE80211_SMPS_STATIC:
/* override NSS */
add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
break;
case IEEE80211_SMPS_DYNAMIC:
add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
break;
case IEEE80211_SMPS_OFF:
/* nothing */
break;
}
if (sta->ht_cap.ht_supported) {
add_sta_cmd.station_flags_msk |=
cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
STA_FLG_AGG_MPDU_DENS_MSK);
mpdu_dens = sta->ht_cap.ampdu_density;
}
if (sta->vht_cap.vht_supported) {
agg_size = sta->vht_cap.cap &
IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
agg_size >>=
IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
} else if (sta->ht_cap.ht_supported) {
agg_size = sta->ht_cap.ampdu_factor;
}
add_sta_cmd.station_flags |=
cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
add_sta_cmd.station_flags |=
cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(add_sta_cmd),
&add_sta_cmd, &status);
if (ret)
return ret;
switch (status) {
case ADD_STA_SUCCESS:
IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
break;
default:
ret = -EIO;
IWL_ERR(mvm, "ADD_STA failed\n");
break;
}
return ret;
}
static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
struct ieee80211_sta *sta)
{
unsigned long used_hw_queues;
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
unsigned int wdg_timeout =
iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
u32 ac;
lockdep_assert_held(&mvm->mutex);
used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
/* Find available queues, and allocate them to the ACs */
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
u8 queue = find_first_zero_bit(&used_hw_queues,
mvm->first_agg_queue);
if (queue >= mvm->first_agg_queue) {
IWL_ERR(mvm, "Failed to allocate STA queue\n");
return -EBUSY;
}
__set_bit(queue, &used_hw_queues);
mvmsta->hw_queue[ac] = queue;
}
/* Found a place for all queues - enable them */
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
mvmsta->hw_queue[ac],
iwl_mvm_ac_to_tx_fifo[ac], 0,
wdg_timeout);
mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
}
return 0;
}
static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
struct ieee80211_sta *sta)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
unsigned long sta_msk;
int i;
lockdep_assert_held(&mvm->mutex);
/* disable the TDLS STA-specific queues */
sta_msk = mvmsta->tfd_queue_msk;
for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
}
int iwl_mvm_add_sta(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
int i, ret, sta_id;
lockdep_assert_held(&mvm->mutex);
if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
sta_id = iwl_mvm_find_free_sta_id(mvm,
ieee80211_vif_type_p2p(vif));
else
sta_id = mvm_sta->sta_id;
if (sta_id == IWL_MVM_STATION_COUNT)
return -ENOSPC;
if (vif->type == NL80211_IFTYPE_AP) {
mvmvif->ap_assoc_sta_count++;
iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
}
spin_lock_init(&mvm_sta->lock);
mvm_sta->sta_id = sta_id;
mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
mvmvif->color);
mvm_sta->vif = vif;
mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
mvm_sta->tx_protection = 0;
mvm_sta->tt_tx_protection = false;
/* HW restart, don't assume the memory has been zeroed */
atomic_set(&mvm->pending_frames[sta_id], 0);
mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
mvm_sta->tfd_queue_msk = 0;
/* allocate new queues for a TDLS station */
if (sta->tdls) {
ret = iwl_mvm_tdls_sta_init(mvm, sta);
if (ret)
return ret;
} else {
for (i = 0; i < IEEE80211_NUM_ACS; i++)
if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
}
/* for HW restart - reset everything but the sequence number */
for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
u16 seq = mvm_sta->tid_data[i].seq_number;
memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
mvm_sta->tid_data[i].seq_number = seq;
}
mvm_sta->agg_tids = 0;
ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
if (ret)
goto err;
if (vif->type == NL80211_IFTYPE_STATION) {
if (!sta->tdls) {
WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
mvmvif->ap_sta_id = sta_id;
} else {
WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
}
}
rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
return 0;
err:
iwl_mvm_tdls_sta_deinit(mvm, sta);
return ret;
}
int iwl_mvm_update_sta(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
return iwl_mvm_sta_send_to_fw(mvm, sta, true);
}
int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
bool drain)
{
struct iwl_mvm_add_sta_cmd cmd = {};
int ret;
u32 status;
lockdep_assert_held(&mvm->mutex);
cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
cmd.sta_id = mvmsta->sta_id;
cmd.add_modify = STA_MODE_MODIFY;
cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
&cmd, &status);
if (ret)
return ret;
switch (status) {
case ADD_STA_SUCCESS:
IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
mvmsta->sta_id);
break;
default:
ret = -EIO;
IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
mvmsta->sta_id);
break;
}
return ret;
}
/*
* Remove a station from the FW table. Before sending the command to remove
* the station validate that the station is indeed known to the driver (sanity
* only).
*/
static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
{
struct ieee80211_sta *sta;
struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
.sta_id = sta_id,
};
int ret;
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
/* Note: internal stations are marked as error values */
if (!sta) {
IWL_ERR(mvm, "Invalid station id\n");
return -EINVAL;
}
ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
sizeof(rm_sta_cmd), &rm_sta_cmd);
if (ret) {
IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
return ret;
}
return 0;
}
void iwl_mvm_sta_drained_wk(struct work_struct *wk)
{
struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
u8 sta_id;
/*
* The mutex is needed because of the SYNC cmd, but not only: if the
* work would run concurrently with iwl_mvm_rm_sta, it would run before
* iwl_mvm_rm_sta sets the station as busy, and exit. Then
* iwl_mvm_rm_sta would set the station as busy, and nobody will clean
* that later.
*/
mutex_lock(&mvm->mutex);
for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
int ret;
struct ieee80211_sta *sta =
rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
/*
* This station is in use or RCU-removed; the latter happens in
* managed mode, where mac80211 removes the station before we
* can remove it from firmware (we can only do that after the
* MAC is marked unassociated), and possibly while the deauth
* frame to disconnect from the AP is still queued. Then, the
* station pointer is -ENOENT when the last skb is reclaimed.
*/
if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
continue;
if (PTR_ERR(sta) == -EINVAL) {
IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
sta_id);
continue;
}
if (!sta) {
IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
sta_id);
continue;
}
WARN_ON(PTR_ERR(sta) != -EBUSY);
/* This station was removed and we waited until it got drained,
* we can now proceed and remove it.
*/
ret = iwl_mvm_rm_sta_common(mvm, sta_id);
if (ret) {
IWL_ERR(mvm,
"Couldn't remove sta %d after it was drained\n",
sta_id);
continue;
}
RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
clear_bit(sta_id, mvm->sta_drained);
if (mvm->tfd_drained[sta_id]) {
unsigned long i, msk = mvm->tfd_drained[sta_id];
for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
iwl_mvm_disable_txq(mvm, i, i,
IWL_MAX_TID_COUNT, 0);
mvm->tfd_drained[sta_id] = 0;
IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
sta_id, msk);
}
}
mutex_unlock(&mvm->mutex);
}
int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
int ret;
lockdep_assert_held(&mvm->mutex);
if (vif->type == NL80211_IFTYPE_STATION &&
mvmvif->ap_sta_id == mvm_sta->sta_id) {
ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
if (ret)
return ret;
/* flush its queues here since we are freeing mvm_sta */
ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
if (ret)
return ret;
ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
mvm_sta->tfd_queue_msk);
if (ret)
return ret;
ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
/* if we are associated - we can't remove the AP STA now */
if (vif->bss_conf.assoc)
return ret;
/* unassoc - go ahead - remove the AP STA now */
mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
/* clear d0i3_ap_sta_id if no longer relevant */
if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
}
/*
* This shouldn't happen - the TDLS channel switch should be canceled
* before the STA is removed.
*/
if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
cancel_delayed_work(&mvm->tdls_cs.dwork);
}
/*
* Make sure that the tx response code sees the station as -EBUSY and
* calls the drain worker.
*/
spin_lock_bh(&mvm_sta->lock);
/*
* There are frames pending on the AC queues for this station.
* We need to wait until all the frames are drained...
*/
if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
ERR_PTR(-EBUSY));
spin_unlock_bh(&mvm_sta->lock);
/* disable TDLS sta queues on drain complete */
if (sta->tdls) {
mvm->tfd_drained[mvm_sta->sta_id] =
mvm_sta->tfd_queue_msk;
IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
mvm_sta->sta_id);
}
ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
} else {
spin_unlock_bh(&mvm_sta->lock);
if (sta->tdls)
iwl_mvm_tdls_sta_deinit(mvm, sta);
ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
}
return ret;
}
int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
u8 sta_id)
{
int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
lockdep_assert_held(&mvm->mutex);
RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
return ret;
}
static int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
struct iwl_mvm_int_sta *sta,
u32 qmask, enum nl80211_iftype iftype)
{
if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
return -ENOSPC;
}
sta->tfd_queue_msk = qmask;
/* put a non-NULL value so iterating over the stations won't stop */
rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
return 0;
}
static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
struct iwl_mvm_int_sta *sta)
{
RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
sta->sta_id = IWL_MVM_STATION_COUNT;
}
static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
struct iwl_mvm_int_sta *sta,
const u8 *addr,
u16 mac_id, u16 color)
{
struct iwl_mvm_add_sta_cmd cmd;
int ret;
u32 status;
lockdep_assert_held(&mvm->mutex);
memset(&cmd, 0, sizeof(cmd));
cmd.sta_id = sta->sta_id;
cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
color));
cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
cmd.tid_disable_tx = cpu_to_le16(0xffff);
if (addr)
memcpy(cmd.addr, addr, ETH_ALEN);
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
&cmd, &status);
if (ret)
return ret;
switch (status) {
case ADD_STA_SUCCESS:
IWL_DEBUG_INFO(mvm, "Internal station added.\n");
return 0;
default:
ret = -EIO;
IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
status);
break;
}
return ret;
}
int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
{
unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
mvm->cfg->base_params->wd_timeout :
IWL_WATCHDOG_DISABLED;
int ret;
lockdep_assert_held(&mvm->mutex);
/* Map Aux queue to fifo - needs to happen before adding Aux station */
iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
/* Allocate aux station and assign to it the aux queue */
ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
NL80211_IFTYPE_UNSPECIFIED);
if (ret)
return ret;
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;
}
void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
{
lockdep_assert_held(&mvm->mutex);
iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
}
/*
* Send the add station command for the vif's broadcast station.
* Assumes that the station was already allocated.
*
* @mvm: the mvm component
* @vif: the interface to which the broadcast station is added
* @bsta: the broadcast station to add.
*/
int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
const u8 *baddr = _baddr;
lockdep_assert_held(&mvm->mutex);
if (vif->type == NL80211_IFTYPE_ADHOC)
baddr = vif->bss_conf.bssid;
if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
return -ENOSPC;
return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
mvmvif->id, mvmvif->color);
}
/* Send the FW a request to remove the station from it's internal data
* structures, but DO NOT remove the entry from the local data structures. */
int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
int ret;
lockdep_assert_held(&mvm->mutex);
ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
if (ret)
IWL_WARN(mvm, "Failed sending remove station\n");
return ret;
}
int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
u32 qmask;
lockdep_assert_held(&mvm->mutex);
qmask = iwl_mvm_mac_get_queues_mask(vif);
/*
* The firmware defines the TFD queue mask to only be relevant
* for *unicast* queues, so the multicast (CAB) queue shouldn't
* be included.
*/
if (vif->type == NL80211_IFTYPE_AP)
qmask &= ~BIT(vif->cab_queue);
return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
ieee80211_vif_type_p2p(vif));
}
/* Allocate a new station entry for the broadcast station to the given vif,
* and send it to the FW.
* Note that each P2P mac should have its own broadcast station.
*
* @mvm: the mvm component
* @vif: the interface to which the broadcast station is added
* @bsta: the broadcast station to add. */
int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
int ret;
lockdep_assert_held(&mvm->mutex);
ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
if (ret)
return ret;
ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
if (ret)
iwl_mvm_dealloc_int_sta(mvm, bsta);
return ret;
}
void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
}
/*
* Send the FW a request to remove the station from it's internal data
* structures, and in addition remove it from the local data structure.
*/
int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
int ret;
lockdep_assert_held(&mvm->mutex);
ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
iwl_mvm_dealloc_bcast_sta(mvm, vif);
return ret;
}
#define IWL_MAX_RX_BA_SESSIONS 16
int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
int tid, u16 ssn, bool start)
{
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_add_sta_cmd cmd = {};
int ret;
u32 status;
lockdep_assert_held(&mvm->mutex);
if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
return -ENOSPC;
}
cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
cmd.sta_id = mvm_sta->sta_id;
cmd.add_modify = STA_MODE_MODIFY;
if (start) {
cmd.add_immediate_ba_tid = (u8) tid;
cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
} else {
cmd.remove_immediate_ba_tid = (u8) tid;
}
cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
STA_MODIFY_REMOVE_BA_TID;
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
&cmd, &status);
if (ret)
return ret;
switch (status) {
case ADD_STA_SUCCESS:
IWL_DEBUG_INFO(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) {
if (start)
mvm->rx_ba_sessions++;
else if (mvm->rx_ba_sessions > 0)
/* check that restart flow didn't zero the counter */
mvm->rx_ba_sessions--;
}
return ret;
}
static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
int tid, u8 queue, bool start)
{
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_add_sta_cmd cmd = {};
int ret;
u32 status;
lockdep_assert_held(&mvm->mutex);
if (start) {
mvm_sta->tfd_queue_msk |= BIT(queue);
mvm_sta->tid_disable_agg &= ~BIT(tid);
} else {
mvm_sta->tfd_queue_msk &= ~BIT(queue);
mvm_sta->tid_disable_agg |= BIT(tid);
}
cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
cmd.sta_id = mvm_sta->sta_id;
cmd.add_modify = STA_MODE_MODIFY;
cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
&cmd, &status);
if (ret)
return ret;
switch (status) {
case ADD_STA_SUCCESS:
break;
default:
ret = -EIO;
IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
start ? "start" : "stopp", status);
break;
}
return ret;
}
const u8 tid_to_mac80211_ac[] = {
IEEE80211_AC_BE,
IEEE80211_AC_BK,
IEEE80211_AC_BK,
IEEE80211_AC_BE,
IEEE80211_AC_VI,
IEEE80211_AC_VI,
IEEE80211_AC_VO,
IEEE80211_AC_VO,
};
static const u8 tid_to_ucode_ac[] = {
AC_BE,
AC_BK,
AC_BK,
AC_BE,
AC_VI,
AC_VI,
AC_VO,
AC_VO,
};
int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data *tid_data;
int txq_id;
int ret;
if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
return -EINVAL;
if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
mvmsta->tid_data[tid].state);
return -ENXIO;
}
lockdep_assert_held(&mvm->mutex);
spin_lock_bh(&mvmsta->lock);
/* possible race condition - we entered D0i3 while starting agg */
if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
spin_unlock_bh(&mvmsta->lock);
IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
return -EIO;
}
spin_lock_bh(&mvm->queue_info_lock);
txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue,
mvm->last_agg_queue);
if (txq_id < 0) {
ret = txq_id;
spin_unlock_bh(&mvm->queue_info_lock);
IWL_ERR(mvm, "Failed to allocate agg queue\n");
goto release_locks;
}
mvm->queue_info[txq_id].setup_reserved = true;
spin_unlock_bh(&mvm->queue_info_lock);
tid_data = &mvmsta->tid_data[tid];
tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
tid_data->txq_id = txq_id;
*ssn = tid_data->ssn;
IWL_DEBUG_TX_QUEUES(mvm,
"Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
mvmsta->sta_id, tid, txq_id, tid_data->ssn,
tid_data->next_reclaimed);
if (tid_data->ssn == tid_data->next_reclaimed) {
tid_data->state = IWL_AGG_STARTING;
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
} else {
tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
}
ret = 0;
release_locks:
spin_unlock_bh(&mvmsta->lock);
return ret;
}
int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u8 buf_size)
{
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, fifo, ret;
u16 ssn;
BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
!= IWL_MAX_TID_COUNT);
buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
spin_lock_bh(&mvmsta->lock);
ssn = tid_data->ssn;
queue = tid_data->txq_id;
tid_data->state = IWL_AGG_ON;
mvmsta->agg_tids |= BIT(tid);
tid_data->ssn = 0xffff;
spin_unlock_bh(&mvmsta->lock);
fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
iwl_mvm_enable_agg_txq(mvm, queue,
vif->hw_queue[tid_to_mac80211_ac[tid]], fifo,
mvmsta->sta_id, tid, buf_size, ssn, wdg_timeout);
ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
if (ret)
return -EIO;
/* No need to mark as reserved */
spin_lock_bh(&mvm->queue_info_lock);
mvm->queue_info[queue].setup_reserved = false;
spin_unlock_bh(&mvm->queue_info_lock);
/*
* Even though in theory the peer could have different
* aggregation reorder buffer sizes for different sessions,
* our ucode doesn't allow for that and has a global limit
* for each station. Therefore, use the minimum of all the
* aggregation sessions and our default value.
*/
mvmsta->max_agg_bufsize =
min(mvmsta->max_agg_bufsize, buf_size);
mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
sta->addr, tid);
return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
}
int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
u16 txq_id;
int err;
/*
* If mac80211 is cleaning its state, then say that we finished since
* our state has been cleared anyway.
*/
if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
return 0;
}
spin_lock_bh(&mvmsta->lock);
txq_id = tid_data->txq_id;
IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
mvmsta->sta_id, tid, txq_id, tid_data->state);
mvmsta->agg_tids &= ~BIT(tid);
/* No need to mark as reserved anymore */
spin_lock_bh(&mvm->queue_info_lock);
mvm->queue_info[txq_id].setup_reserved = false;
spin_unlock_bh(&mvm->queue_info_lock);
switch (tid_data->state) {
case IWL_AGG_ON:
tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
IWL_DEBUG_TX_QUEUES(mvm,
"ssn = %d, next_recl = %d\n",
tid_data->ssn, tid_data->next_reclaimed);
/* There are still packets for this RA / TID in the HW */
if (tid_data->ssn != tid_data->next_reclaimed) {
tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
err = 0;
break;
}
tid_data->ssn = 0xffff;
tid_data->state = IWL_AGG_OFF;
spin_unlock_bh(&mvmsta->lock);
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
iwl_mvm_disable_txq(mvm, txq_id,
vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
0);
return 0;
case IWL_AGG_STARTING:
case IWL_EMPTYING_HW_QUEUE_ADDBA:
/*
* The agg session has been stopped before it was set up. This
* can happen when the AddBA timer times out for example.
*/
/* No barriers since we are under mutex */
lockdep_assert_held(&mvm->mutex);
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
tid_data->state = IWL_AGG_OFF;
err = 0;
break;
default:
IWL_ERR(mvm,
"Stopping AGG while state not ON or starting for %d on %d (%d)\n",
mvmsta->sta_id, tid, tid_data->state);
IWL_ERR(mvm,
"\ttid_data->txq_id = %d\n", tid_data->txq_id);
err = -EINVAL;
}
spin_unlock_bh(&mvmsta->lock);
return err;
}
int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
u16 txq_id;
enum iwl_mvm_agg_state old_state;
/*
* First set the agg state to OFF to avoid calling
* ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
*/
spin_lock_bh(&mvmsta->lock);
txq_id = tid_data->txq_id;
IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
mvmsta->sta_id, tid, txq_id, tid_data->state);
old_state = tid_data->state;
tid_data->state = IWL_AGG_OFF;
mvmsta->agg_tids &= ~BIT(tid);
spin_unlock_bh(&mvmsta->lock);
/* No need to mark as reserved */
spin_lock_bh(&mvm->queue_info_lock);
mvm->queue_info[txq_id].setup_reserved = false;
spin_unlock_bh(&mvm->queue_info_lock);
if (old_state >= IWL_AGG_ON) {
iwl_mvm_drain_sta(mvm, mvmsta, true);
if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
iwl_trans_wait_tx_queue_empty(mvm->trans,
mvmsta->tfd_queue_msk);
iwl_mvm_drain_sta(mvm, mvmsta, false);
iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
iwl_mvm_disable_txq(mvm, tid_data->txq_id,
vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
0);
}
return 0;
}
static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
{
int i, max = -1, max_offs = -1;
lockdep_assert_held(&mvm->mutex);
/* Pick the unused key offset with the highest 'deleted'
* counter. Every time a key is deleted, all the counters
* are incremented and the one that was just deleted is
* reset to zero. Thus, the highest counter is the one
* that was deleted longest ago. Pick that one.
*/
for (i = 0; i < STA_KEY_MAX_NUM; i++) {
if (test_bit(i, mvm->fw_key_table))
continue;
if (mvm->fw_key_deleted[i] > max) {
max = mvm->fw_key_deleted[i];
max_offs = i;
}
}
if (max_offs < 0)
return STA_KEY_IDX_INVALID;
__set_bit(max_offs, mvm->fw_key_table);
return max_offs;
}
static u8 iwl_mvm_get_key_sta_id(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) {
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
return mvm_sta->sta_id;
}
/*
* The device expects GTKs for station interfaces to be
* installed as GTKs for the AP station. If we have no
* station ID, then use AP's station ID.
*/
if (vif->type == NL80211_IFTYPE_STATION &&
mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
u8 sta_id = mvmvif->ap_sta_id;
sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
/*
* It is possible that the 'sta' parameter is NULL,
* for example when a GTK is removed - the sta_id will then
* be the AP ID, and no station was passed by mac80211.
*/
if (IS_ERR_OR_NULL(sta))
return IWL_MVM_STATION_COUNT;
return sta_id;
}
return IWL_MVM_STATION_COUNT;
}
static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
struct iwl_mvm_sta *mvm_sta,
struct ieee80211_key_conf *keyconf, bool mcast,
u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
u8 key_offset)
{
struct iwl_mvm_add_sta_key_cmd cmd = {};
__le16 key_flags;
int ret;
u32 status;
u16 keyidx;
int i;
u8 sta_id = mvm_sta->sta_id;
keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
STA_KEY_FLG_KEYID_MSK;
key_flags = cpu_to_le16(keyidx);
key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
switch (keyconf->cipher) {
case WLAN_CIPHER_SUITE_TKIP:
key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
cmd.tkip_rx_tsc_byte2 = tkip_iv32;
for (i = 0; i < 5; i++)
cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
memcpy(cmd.key, keyconf->key, keyconf->keylen);
break;
case WLAN_CIPHER_SUITE_CCMP:
key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
memcpy(cmd.key, keyconf->key, keyconf->keylen);
break;
case WLAN_CIPHER_SUITE_WEP104:
key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
/* fall through */
case WLAN_CIPHER_SUITE_WEP40:
key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
break;
default:
key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
memcpy(cmd.key, keyconf->key, keyconf->keylen);
}
if (mcast)
key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
cmd.key_offset = key_offset;
cmd.key_flags = key_flags;
cmd.sta_id = sta_id;
status = ADD_STA_SUCCESS;
if (cmd_flags & CMD_ASYNC)
ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
sizeof(cmd), &cmd);
else
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
&cmd, &status);
switch (status) {
case ADD_STA_SUCCESS:
IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
break;
default:
ret = -EIO;
IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
break;
}
return ret;
}
static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
struct ieee80211_key_conf *keyconf,
u8 sta_id, bool remove_key)
{
struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
/* verify the key details match the required command's expectations */
if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
(keyconf->keyidx != 4 && keyconf->keyidx != 5)))
return -EINVAL;
igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
igtk_cmd.sta_id = cpu_to_le32(sta_id);
if (remove_key) {
igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
} else {
struct ieee80211_key_seq seq;
const u8 *pn;
memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
ieee80211_get_key_rx_seq(keyconf, 0, &seq);
pn = seq.aes_cmac.pn;
igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
((u64) pn[4] << 8) |
((u64) pn[3] << 16) |
((u64) pn[2] << 24) |
((u64) pn[1] << 32) |
((u64) pn[0] << 40));
}
IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
remove_key ? "removing" : "installing",
igtk_cmd.sta_id);
return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
sizeof(igtk_cmd), &igtk_cmd);
}
static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (sta)
return sta->addr;
if (vif->type == NL80211_IFTYPE_STATION &&
mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
u8 sta_id = mvmvif->ap_sta_id;
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
return sta->addr;
}
return NULL;
}
static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *keyconf,
u8 key_offset,
bool mcast)
{
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
int ret;
const u8 *addr;
struct ieee80211_key_seq seq;
u16 p1k[5];
switch (keyconf->cipher) {
case WLAN_CIPHER_SUITE_TKIP:
addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
/* get phase 1 key from mac80211 */
ieee80211_get_key_rx_seq(keyconf, 0, &seq);
ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
seq.tkip.iv32, p1k, 0, key_offset);
break;
case WLAN_CIPHER_SUITE_CCMP:
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
0, NULL, 0, key_offset);
break;
default:
ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
0, NULL, 0, key_offset);
}
return ret;
}
static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
struct ieee80211_key_conf *keyconf,
bool mcast)
{
struct iwl_mvm_add_sta_key_cmd cmd = {};
__le16 key_flags;
int ret;
u32 status;
key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
STA_KEY_FLG_KEYID_MSK);
key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
if (mcast)
key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
cmd.key_flags = key_flags;
cmd.key_offset = keyconf->hw_key_idx;
cmd.sta_id = sta_id;
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
&cmd, &status);
switch (status) {
case ADD_STA_SUCCESS:
IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
break;
default:
ret = -EIO;
IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
break;
}
return ret;
}
int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *keyconf,
u8 key_offset)
{
bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
u8 sta_id;
int ret;
static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
lockdep_assert_held(&mvm->mutex);
/* Get the station id from the mvm local station table */
sta_id = iwl_mvm_get_key_sta_id(mvm, vif, sta);
if (sta_id == IWL_MVM_STATION_COUNT) {
IWL_ERR(mvm, "Failed to find station id\n");
return -EINVAL;
}
if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
goto end;
}
/*
* It is possible that the 'sta' parameter is NULL, and thus
* there is a need to retrieve the sta from the local station table.
*/
if (!sta) {
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
if (IS_ERR_OR_NULL(sta)) {
IWL_ERR(mvm, "Invalid station id\n");
return -EINVAL;
}
}
if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
return -EINVAL;
/* If the key_offset is not pre-assigned, we need to find a
* new offset to use. In normal cases, the offset is not
* pre-assigned, but during HW_RESTART we want to reuse the
* same indices, so we pass them when this function is called.
*
* In D3 entry, we need to hardcoded the indices (because the
* firmware hardcodes the PTK offset to 0). In this case, we
* need to make sure we don't overwrite the hw_key_idx in the
* keyconf structure, because otherwise we cannot configure
* the original ones back when resuming.
*/
if (key_offset == STA_KEY_IDX_INVALID) {
key_offset = iwl_mvm_set_fw_key_idx(mvm);
if (key_offset == STA_KEY_IDX_INVALID)
return -ENOSPC;
keyconf->hw_key_idx = key_offset;
}
ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
if (ret) {
__clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
goto end;
}
/*
* For WEP, the same key is used for multicast and unicast. Upload it
* again, using the same key offset, and now pointing the other one
* to the same key slot (offset).
* If this fails, remove the original as well.
*/
if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
key_offset, !mcast);
if (ret) {
__clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
__iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
}
}
end:
IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
keyconf->cipher, keyconf->keylen, keyconf->keyidx,
sta ? sta->addr : zero_addr, ret);
return ret;
}
int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *keyconf)
{
bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
u8 sta_id;
int ret, i;
lockdep_assert_held(&mvm->mutex);
/* Get the station id from the mvm local station table */
sta_id = iwl_mvm_get_key_sta_id(mvm, vif, sta);
IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
keyconf->keyidx, sta_id);
if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
IWL_ERR(mvm, "offset %d not used in fw key table.\n",
keyconf->hw_key_idx);
return -ENOENT;
}
/* track which key was deleted last */
for (i = 0; i < STA_KEY_MAX_NUM; i++) {
if (mvm->fw_key_deleted[i] < U8_MAX)
mvm->fw_key_deleted[i]++;
}
mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
if (sta_id == IWL_MVM_STATION_COUNT) {
IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
return 0;
}
ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
if (ret)
return ret;
/* delete WEP key twice to get rid of (now useless) offset */
if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
return ret;
}
void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_key_conf *keyconf,
struct ieee80211_sta *sta, u32 iv32,
u16 *phase1key)
{
struct iwl_mvm_sta *mvm_sta;
u8 sta_id;
bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
rcu_read_lock();
sta_id = iwl_mvm_get_key_sta_id(mvm, vif, sta);
if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
goto unlock;
if (!sta) {
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
if (WARN_ON(IS_ERR_OR_NULL(sta))) {
rcu_read_unlock();
return;
}
}
mvm_sta = iwl_mvm_sta_from_mac80211(sta);
iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
unlock:
rcu_read_unlock();
}
void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
struct ieee80211_sta *sta)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_add_sta_cmd cmd = {
.add_modify = STA_MODE_MODIFY,
.sta_id = mvmsta->sta_id,
.station_flags_msk = cpu_to_le32(STA_FLG_PS),
.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
};
int ret;
ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
if (ret)
IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
struct ieee80211_sta *sta,
enum ieee80211_frame_release_type reason,
u16 cnt, u16 tids, bool more_data,
bool agg)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_add_sta_cmd cmd = {
.add_modify = STA_MODE_MODIFY,
.sta_id = mvmsta->sta_id,
.modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
.sleep_tx_count = cpu_to_le16(cnt),
.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
};
int tid, ret;
unsigned long _tids = tids;
/* convert TIDs to ACs - we don't support TSPEC so that's OK
* Note that this field is reserved and unused by firmware not
* supporting GO uAPSD, so it's safe to always do this.
*/
for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
/* If we're releasing frames from aggregation queues then check if the
* all queues combined that we're releasing frames from have
* - more frames than the service period, in which case more_data
* needs to be set
* - fewer than 'cnt' frames, in which case we need to adjust the
* firmware command (but do that unconditionally)
*/
if (agg) {
int remaining = cnt;
int sleep_tx_count;
spin_lock_bh(&mvmsta->lock);
for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
struct iwl_mvm_tid_data *tid_data;
u16 n_queued;
tid_data = &mvmsta->tid_data[tid];
if (WARN(tid_data->state != IWL_AGG_ON &&
tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
"TID %d state is %d\n",
tid, tid_data->state)) {
spin_unlock_bh(&mvmsta->lock);
ieee80211_sta_eosp(sta);
return;
}
n_queued = iwl_mvm_tid_queued(tid_data);
if (n_queued > remaining) {
more_data = true;
remaining = 0;
break;
}
remaining -= n_queued;
}
sleep_tx_count = cnt - remaining;
if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
mvmsta->sleep_tx_count = sleep_tx_count;
spin_unlock_bh(&mvmsta->lock);
cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
if (WARN_ON(cnt - remaining == 0)) {
ieee80211_sta_eosp(sta);
return;
}
}
/* Note: this is ignored by firmware not supporting GO uAPSD */
if (more_data)
cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
mvmsta->next_status_eosp = true;
cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
} else {
cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
}
/* block the Tx queues until the FW updated the sleep Tx count */
iwl_trans_block_txq_ptrs(mvm->trans, true);
ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
sizeof(cmd), &cmd);
if (ret)
IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
struct ieee80211_sta *sta;
u32 sta_id = le32_to_cpu(notif->sta_id);
if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
return;
rcu_read_lock();
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
if (!IS_ERR_OR_NULL(sta))
ieee80211_sta_eosp(sta);
rcu_read_unlock();
}
void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
struct iwl_mvm_sta *mvmsta, bool disable)
{
struct iwl_mvm_add_sta_cmd cmd = {
.add_modify = STA_MODE_MODIFY,
.sta_id = mvmsta->sta_id,
.station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
.station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
};
int ret;
ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
if (ret)
IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
struct ieee80211_sta *sta,
bool disable)
{
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
spin_lock_bh(&mvm_sta->lock);
if (mvm_sta->disable_tx == disable) {
spin_unlock_bh(&mvm_sta->lock);
return;
}
mvm_sta->disable_tx = disable;
/*
* Tell mac80211 to start/stop queuing tx for this station,
* but don't stop queuing if there are still pending frames
* for this station.
*/
if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
ieee80211_sta_block_awake(mvm->hw, sta, disable);
iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
spin_unlock_bh(&mvm_sta->lock);
}
void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
struct iwl_mvm_vif *mvmvif,
bool disable)
{
struct ieee80211_sta *sta;
struct iwl_mvm_sta *mvm_sta;
int i;
lockdep_assert_held(&mvm->mutex);
/* Block/unblock all the stations of the given mvmvif */
for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
lockdep_is_held(&mvm->mutex));
if (IS_ERR_OR_NULL(sta))
continue;
mvm_sta = iwl_mvm_sta_from_mac80211(sta);
if (mvm_sta->mac_id_n_color !=
FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
continue;
iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
}
}
void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_sta *mvmsta;
rcu_read_lock();
mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
if (!WARN_ON(!mvmsta))
iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
rcu_read_unlock();
}
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