| /****************************************************************************** |
| * |
| * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved. |
| * Copyright(c) 2013 - 2014 Intel Mobile Communications 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 "mvm.h" |
| |
| /* For counting bound interfaces */ |
| struct iwl_mvm_active_iface_iterator_data { |
| struct ieee80211_vif* ignore_vif; |
| uint8_t sta_vif_ap_sta_id; |
| enum iwl_sf_state sta_vif_state; |
| uint32_t 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, uint8_t* 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 || |
| vif->type == NL80211_IFTYPE_NAN) { |
| 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 default configuration |
| */ |
| static const __le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = { |
| {cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF), cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF)}, |
| {cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF), cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF)}, |
| {cpu_to_le32(SF_MCAST_AGING_TIMER_DEF), cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF)}, |
| {cpu_to_le32(SF_BA_AGING_TIMER_DEF), cpu_to_le32(SF_BA_IDLE_TIMER_DEF)}, |
| {cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF), cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF)}, |
| }; |
| |
| /* |
| * Aging and idle timeouts for the different possible scenarios |
| * in single BSS MAC configuration. |
| */ |
| 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_mvm* mvm, 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); |
| } |
| } |
| |
| if (sta) { |
| 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)); |
| } else { |
| BUILD_BUG_ON(sizeof(sf_full_timeout_def) != |
| sizeof(__le32) * SF_NUM_SCENARIO * SF_NUM_TIMEOUT_TYPES); |
| |
| memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def, sizeof(sf_full_timeout_def)); |
| } |
| } |
| |
| static int iwl_mvm_sf_config(struct iwl_mvm* mvm, uint8_t sta_id, enum iwl_sf_state new_state) { |
| struct iwl_sf_cfg_cmd sf_cmd = { |
| .state = cpu_to_le32(new_state), |
| }; |
| struct ieee80211_sta* sta; |
| int ret = 0; |
| |
| if (mvm->cfg->disable_dummy_notification) { |
| sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF); |
| } |
| |
| /* |
| * 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: |
| iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL); |
| break; |
| case SF_FULL_ON: |
| if (sta_id == IWL_MVM_INVALID_STA) { |
| 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(mvm, &sf_cmd, sta); |
| rcu_read_unlock(); |
| break; |
| case SF_INIT_OFF: |
| iwl_mvm_fill_sf_command(mvm, &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; |
| uint8_t sta_id = IWL_MVM_INVALID_STA; |
| 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_INVALID_STA, |
| }; |
| |
| /* |
| * 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 || |
| changed_vif->type == NL80211_IFTYPE_NAN))) { |
| 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); |
| } |
