diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/sf.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/sf.c | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/sf.c b/drivers/net/wireless/iwlwifi/mvm/sf.c new file mode 100644 index 00000000000..7edfd15efc9 --- /dev/null +++ b/drivers/net/wireless/iwlwifi/mvm/sf.c @@ -0,0 +1,289 @@ +/****************************************************************************** + * + * 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, + }; + + /* + * 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 && + changed_vif->bss_conf.dtim_period) { + 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); +} |