/******************************************************************************
*
* 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) 2013 - 2014 Intel Corporation. All rights reserved.
*
* 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) 2013 - 2014 Intel Corporation. All rights reserved.
* 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 "mvm.h"
/* For counting bound interfaces */
struct iwl_mvm_active_iface_iterator_data {
struct ieee80211_vif *ignore_vif;
u8 sta_vif_ap_sta_id;
enum iwl_sf_state sta_vif_state;
int num_active_macs;
};
/*
* Count bound interfaces which are not p2p, besides data->ignore_vif.
* data->station_vif will point to one bound vif of type station, if exists.
*/
static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mvm_active_iface_iterator_data *data = _data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (vif == data->ignore_vif || !mvmvif->phy_ctxt ||
vif->type == NL80211_IFTYPE_P2P_DEVICE)
return;
data->num_active_macs++;
if (vif->type == NL80211_IFTYPE_STATION) {
data->sta_vif_ap_sta_id = mvmvif->ap_sta_id;
if (vif->bss_conf.assoc)
data->sta_vif_state = SF_FULL_ON;
else
data->sta_vif_state = SF_INIT_OFF;
}
}
/*
* Aging and idle timeouts for the different possible scenarios
* in SF_FULL_ON state.
*/
static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
{
cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER),
cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER)
},
{
cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER),
cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER)
},
{
cpu_to_le32(SF_MCAST_AGING_TIMER),
cpu_to_le32(SF_MCAST_IDLE_TIMER)
},
{
cpu_to_le32(SF_BA_AGING_TIMER),
cpu_to_le32(SF_BA_IDLE_TIMER)
},
{
cpu_to_le32(SF_TX_RE_AGING_TIMER),
cpu_to_le32(SF_TX_RE_IDLE_TIMER)
},
};
static void iwl_mvm_fill_sf_command(struct iwl_sf_cfg_cmd *sf_cmd,
struct ieee80211_sta *sta)
{
int i, j, watermark;
sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN);
/*
* If we are in association flow - check antenna configuration
* capabilities of the AP station, and choose the watermark accordingly.
*/
if (sta) {
if (sta->ht_cap.ht_supported || sta->vht_cap.vht_supported) {
switch (sta->rx_nss) {
case 1:
watermark = SF_W_MARK_SISO;
break;
case 2:
watermark = SF_W_MARK_MIMO2;
break;
default:
watermark = SF_W_MARK_MIMO3;
break;
}
} else {
watermark = SF_W_MARK_LEGACY;
}
/* default watermark value for unassociated mode. */
} else {
watermark = SF_W_MARK_MIMO2;
}
sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
for (i = 0; i < SF_NUM_SCENARIO; i++) {
for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
sf_cmd->long_delay_timeouts[i][j] =
cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
}
}
BUILD_BUG_ON(sizeof(sf_full_timeout) !=
sizeof(__le32) * SF_NUM_SCENARIO * SF_NUM_TIMEOUT_TYPES);
memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
sizeof(sf_full_timeout));
}
static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id,
enum iwl_sf_state new_state)
{
struct iwl_sf_cfg_cmd sf_cmd = {
.state = new_state,
};
struct ieee80211_sta *sta;
int ret = 0;
/*
* If an associated AP sta changed its antenna configuration, the state
* will remain FULL_ON but SF parameters need to be reconsidered.
*/
if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
return 0;
switch (new_state) {
case SF_UNINIT:
break;
case SF_FULL_ON:
if (sta_id == IWL_MVM_STATION_COUNT) {
IWL_ERR(mvm,
"No station: Cannot switch SF to FULL_ON\n");
return -EINVAL;
}
rcu_read_lock();
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
if (IS_ERR_OR_NULL(sta)) {
IWL_ERR(mvm, "Invalid station id\n");
rcu_read_unlock();
return -EINVAL;
}
iwl_mvm_fill_sf_command(&sf_cmd, sta);
rcu_read_unlock();
break;
case SF_INIT_OFF:
iwl_mvm_fill_sf_command(&sf_cmd, NULL);
break;
default:
WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
new_state);
return -EINVAL;
}
ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
sizeof(sf_cmd), &sf_cmd);
if (!ret)
mvm->sf_state = new_state;
return ret;
}
/*
* Update Smart fifo:
* Count bound interfaces that are not to be removed, ignoring p2p devices,
* and set new state accordingly.
*/
int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
bool remove_vif)
{
enum iwl_sf_state new_state;
u8 sta_id = IWL_MVM_STATION_COUNT;
struct iwl_mvm_vif *mvmvif = NULL;
struct iwl_mvm_active_iface_iterator_data data = {
.ignore_vif = changed_vif,
.sta_vif_state = SF_UNINIT,
.sta_vif_ap_sta_id = IWL_MVM_STATION_COUNT,
};
if (IWL_UCODE_API(mvm->fw->ucode_ver) < 8)
return 0;
/*
* Ignore the call if we are in HW Restart flow, or if the handled
* vif is a p2p device.
*/
if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
(changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
return 0;
ieee80211_iterate_active_interfaces_atomic(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_bound_iface_iterator,
&data);
/* If changed_vif exists and is not to be removed, add to the count */
if (changed_vif && !remove_vif)
data.num_active_macs++;
switch (data.num_active_macs) {
case 0:
/* If there are no active macs - change state to SF_INIT_OFF */
new_state = SF_INIT_OFF;
break;
case 1:
if (remove_vif) {
/* The one active mac left is of type station
* and we filled the relevant data during iteration
*/
new_state = data.sta_vif_state;
sta_id = data.sta_vif_ap_sta_id;
} else {
if (WARN_ON(!changed_vif))
return -EINVAL;
if (changed_vif->type != NL80211_IFTYPE_STATION) {
new_state = SF_UNINIT;
} else if (changed_vif->bss_conf.assoc) {
mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
sta_id = mvmvif->ap_sta_id;
new_state = SF_FULL_ON;
} else {
new_state = SF_INIT_OFF;
}
}
break;
default:
/* If there are multiple active macs - change to SF_UNINIT */
new_state = SF_UNINIT;
}
return iwl_mvm_sf_config(mvm, sta_id, new_state);
}