4122 lines
116 KiB
C
4122 lines
116 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
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* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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* Copyright(c) 2016 Intel Deutschland GmbH
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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* Contact Information:
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* Intel Linux Wireless <linuxwifi@intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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*****************************************************************************/
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#include <linux/kernel.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <net/mac80211.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/delay.h>
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#include <linux/workqueue.h>
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#include "rs.h"
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#include "fw-api.h"
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#include "sta.h"
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#include "iwl-op-mode.h"
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#include "mvm.h"
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#include "debugfs.h"
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#define RS_NAME "iwl-mvm-rs"
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#define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */
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/* Calculations of success ratio are done in fixed point where 12800 is 100%.
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* Use this macro when dealing with thresholds consts set as a percentage
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*/
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#define RS_PERCENT(x) (128 * x)
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static u8 rs_ht_to_legacy[] = {
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[IWL_RATE_MCS_0_INDEX] = IWL_RATE_6M_INDEX,
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[IWL_RATE_MCS_1_INDEX] = IWL_RATE_9M_INDEX,
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[IWL_RATE_MCS_2_INDEX] = IWL_RATE_12M_INDEX,
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[IWL_RATE_MCS_3_INDEX] = IWL_RATE_18M_INDEX,
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[IWL_RATE_MCS_4_INDEX] = IWL_RATE_24M_INDEX,
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[IWL_RATE_MCS_5_INDEX] = IWL_RATE_36M_INDEX,
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[IWL_RATE_MCS_6_INDEX] = IWL_RATE_48M_INDEX,
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[IWL_RATE_MCS_7_INDEX] = IWL_RATE_54M_INDEX,
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[IWL_RATE_MCS_8_INDEX] = IWL_RATE_54M_INDEX,
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[IWL_RATE_MCS_9_INDEX] = IWL_RATE_54M_INDEX,
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};
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static const u8 ant_toggle_lookup[] = {
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[ANT_NONE] = ANT_NONE,
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[ANT_A] = ANT_B,
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[ANT_B] = ANT_C,
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[ANT_AB] = ANT_BC,
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[ANT_C] = ANT_A,
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[ANT_AC] = ANT_AB,
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[ANT_BC] = ANT_AC,
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[ANT_ABC] = ANT_ABC,
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};
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#define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \
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[IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
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IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
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IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
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IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
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IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\
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IWL_RATE_##rp##M_INDEX, \
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IWL_RATE_##rn##M_INDEX }
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#define IWL_DECLARE_MCS_RATE(s) \
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[IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \
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IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
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IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
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IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
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IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \
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IWL_RATE_INVM_INDEX, \
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IWL_RATE_INVM_INDEX }
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/*
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* Parameter order:
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* rate, ht rate, prev rate, next rate
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*
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* If there isn't a valid next or previous rate then INV is used which
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* maps to IWL_RATE_INVALID
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*
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*/
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static const struct iwl_rs_rate_info iwl_rates[IWL_RATE_COUNT] = {
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IWL_DECLARE_RATE_INFO(1, INV, INV, 2), /* 1mbps */
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IWL_DECLARE_RATE_INFO(2, INV, 1, 5), /* 2mbps */
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IWL_DECLARE_RATE_INFO(5, INV, 2, 11), /*5.5mbps */
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IWL_DECLARE_RATE_INFO(11, INV, 9, 12), /* 11mbps */
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IWL_DECLARE_RATE_INFO(6, 0, 5, 11), /* 6mbps ; MCS 0 */
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IWL_DECLARE_RATE_INFO(9, INV, 6, 11), /* 9mbps */
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IWL_DECLARE_RATE_INFO(12, 1, 11, 18), /* 12mbps ; MCS 1 */
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IWL_DECLARE_RATE_INFO(18, 2, 12, 24), /* 18mbps ; MCS 2 */
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IWL_DECLARE_RATE_INFO(24, 3, 18, 36), /* 24mbps ; MCS 3 */
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IWL_DECLARE_RATE_INFO(36, 4, 24, 48), /* 36mbps ; MCS 4 */
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IWL_DECLARE_RATE_INFO(48, 5, 36, 54), /* 48mbps ; MCS 5 */
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IWL_DECLARE_RATE_INFO(54, 6, 48, INV), /* 54mbps ; MCS 6 */
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IWL_DECLARE_MCS_RATE(7), /* MCS 7 */
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IWL_DECLARE_MCS_RATE(8), /* MCS 8 */
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IWL_DECLARE_MCS_RATE(9), /* MCS 9 */
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};
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enum rs_action {
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RS_ACTION_STAY = 0,
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RS_ACTION_DOWNSCALE = -1,
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RS_ACTION_UPSCALE = 1,
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};
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enum rs_column_mode {
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RS_INVALID = 0,
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RS_LEGACY,
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RS_SISO,
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RS_MIMO2,
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};
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#define MAX_NEXT_COLUMNS 7
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#define MAX_COLUMN_CHECKS 3
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struct rs_tx_column;
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typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm,
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struct ieee80211_sta *sta,
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struct rs_rate *rate,
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const struct rs_tx_column *next_col);
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struct rs_tx_column {
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enum rs_column_mode mode;
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u8 ant;
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bool sgi;
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enum rs_column next_columns[MAX_NEXT_COLUMNS];
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allow_column_func_t checks[MAX_COLUMN_CHECKS];
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};
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static bool rs_ant_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
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struct rs_rate *rate,
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const struct rs_tx_column *next_col)
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{
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return iwl_mvm_bt_coex_is_ant_avail(mvm, next_col->ant);
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}
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static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
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struct rs_rate *rate,
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const struct rs_tx_column *next_col)
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{
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struct iwl_mvm_sta *mvmsta;
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struct iwl_mvm_vif *mvmvif;
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if (!sta->ht_cap.ht_supported)
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return false;
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if (sta->smps_mode == IEEE80211_SMPS_STATIC)
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return false;
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if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) < 2)
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return false;
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if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
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return false;
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mvmsta = iwl_mvm_sta_from_mac80211(sta);
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mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
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if (mvm->nvm_data->sku_cap_mimo_disabled)
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return false;
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return true;
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}
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static bool rs_siso_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
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struct rs_rate *rate,
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const struct rs_tx_column *next_col)
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{
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if (!sta->ht_cap.ht_supported)
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return false;
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return true;
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}
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static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
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struct rs_rate *rate,
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const struct rs_tx_column *next_col)
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{
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struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
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struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
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if (is_ht20(rate) && (ht_cap->cap &
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IEEE80211_HT_CAP_SGI_20))
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return true;
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if (is_ht40(rate) && (ht_cap->cap &
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IEEE80211_HT_CAP_SGI_40))
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return true;
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if (is_ht80(rate) && (vht_cap->cap &
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IEEE80211_VHT_CAP_SHORT_GI_80))
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return true;
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if (is_ht160(rate) && (vht_cap->cap &
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IEEE80211_VHT_CAP_SHORT_GI_160))
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return true;
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return false;
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}
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static const struct rs_tx_column rs_tx_columns[] = {
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[RS_COLUMN_LEGACY_ANT_A] = {
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.mode = RS_LEGACY,
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.ant = ANT_A,
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.next_columns = {
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RS_COLUMN_LEGACY_ANT_B,
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RS_COLUMN_SISO_ANT_A,
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RS_COLUMN_MIMO2,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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},
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.checks = {
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rs_ant_allow,
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},
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},
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[RS_COLUMN_LEGACY_ANT_B] = {
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.mode = RS_LEGACY,
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.ant = ANT_B,
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.next_columns = {
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RS_COLUMN_LEGACY_ANT_A,
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RS_COLUMN_SISO_ANT_B,
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RS_COLUMN_MIMO2,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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},
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.checks = {
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rs_ant_allow,
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},
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},
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[RS_COLUMN_SISO_ANT_A] = {
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.mode = RS_SISO,
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.ant = ANT_A,
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.next_columns = {
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RS_COLUMN_SISO_ANT_B,
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RS_COLUMN_MIMO2,
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RS_COLUMN_SISO_ANT_A_SGI,
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RS_COLUMN_LEGACY_ANT_A,
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RS_COLUMN_LEGACY_ANT_B,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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},
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.checks = {
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rs_siso_allow,
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rs_ant_allow,
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},
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},
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[RS_COLUMN_SISO_ANT_B] = {
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.mode = RS_SISO,
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.ant = ANT_B,
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.next_columns = {
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RS_COLUMN_SISO_ANT_A,
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RS_COLUMN_MIMO2,
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RS_COLUMN_SISO_ANT_B_SGI,
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RS_COLUMN_LEGACY_ANT_A,
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RS_COLUMN_LEGACY_ANT_B,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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},
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.checks = {
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rs_siso_allow,
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rs_ant_allow,
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},
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},
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[RS_COLUMN_SISO_ANT_A_SGI] = {
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.mode = RS_SISO,
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.ant = ANT_A,
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.sgi = true,
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.next_columns = {
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RS_COLUMN_SISO_ANT_B_SGI,
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RS_COLUMN_MIMO2_SGI,
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RS_COLUMN_SISO_ANT_A,
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RS_COLUMN_LEGACY_ANT_A,
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RS_COLUMN_LEGACY_ANT_B,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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},
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.checks = {
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rs_siso_allow,
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rs_ant_allow,
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rs_sgi_allow,
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},
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},
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[RS_COLUMN_SISO_ANT_B_SGI] = {
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.mode = RS_SISO,
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.ant = ANT_B,
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.sgi = true,
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.next_columns = {
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RS_COLUMN_SISO_ANT_A_SGI,
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RS_COLUMN_MIMO2_SGI,
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RS_COLUMN_SISO_ANT_B,
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RS_COLUMN_LEGACY_ANT_A,
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RS_COLUMN_LEGACY_ANT_B,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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},
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.checks = {
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rs_siso_allow,
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rs_ant_allow,
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rs_sgi_allow,
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},
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},
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[RS_COLUMN_MIMO2] = {
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.mode = RS_MIMO2,
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.ant = ANT_AB,
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.next_columns = {
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RS_COLUMN_SISO_ANT_A,
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RS_COLUMN_MIMO2_SGI,
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RS_COLUMN_LEGACY_ANT_A,
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RS_COLUMN_LEGACY_ANT_B,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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},
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.checks = {
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rs_mimo_allow,
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},
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},
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[RS_COLUMN_MIMO2_SGI] = {
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.mode = RS_MIMO2,
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.ant = ANT_AB,
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.sgi = true,
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.next_columns = {
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RS_COLUMN_SISO_ANT_A_SGI,
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RS_COLUMN_MIMO2,
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RS_COLUMN_LEGACY_ANT_A,
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RS_COLUMN_LEGACY_ANT_B,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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RS_COLUMN_INVALID,
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},
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.checks = {
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rs_mimo_allow,
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rs_sgi_allow,
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},
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},
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};
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static inline u8 rs_extract_rate(u32 rate_n_flags)
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{
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/* also works for HT because bits 7:6 are zero there */
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return (u8)(rate_n_flags & RATE_LEGACY_RATE_MSK);
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}
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static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
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{
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int idx = 0;
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if (rate_n_flags & RATE_MCS_HT_MSK) {
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idx = rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK;
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idx += IWL_RATE_MCS_0_INDEX;
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/* skip 9M not supported in HT*/
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if (idx >= IWL_RATE_9M_INDEX)
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idx += 1;
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if ((idx >= IWL_FIRST_HT_RATE) && (idx <= IWL_LAST_HT_RATE))
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return idx;
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} else if (rate_n_flags & RATE_MCS_VHT_MSK) {
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idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
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idx += IWL_RATE_MCS_0_INDEX;
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/* skip 9M not supported in VHT*/
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if (idx >= IWL_RATE_9M_INDEX)
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idx++;
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if ((idx >= IWL_FIRST_VHT_RATE) && (idx <= IWL_LAST_VHT_RATE))
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return idx;
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} else {
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/* legacy rate format, search for match in table */
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u8 legacy_rate = rs_extract_rate(rate_n_flags);
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for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
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if (iwl_rates[idx].plcp == legacy_rate)
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return idx;
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}
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return IWL_RATE_INVALID;
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}
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static void rs_rate_scale_perform(struct iwl_mvm *mvm,
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struct ieee80211_sta *sta,
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struct iwl_lq_sta *lq_sta,
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int tid, bool ndp);
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static void rs_fill_lq_cmd(struct iwl_mvm *mvm,
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struct ieee80211_sta *sta,
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struct iwl_lq_sta *lq_sta,
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const struct rs_rate *initial_rate);
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static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search);
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/**
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* The following tables contain the expected throughput metrics for all rates
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*
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* 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits
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*
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* where invalid entries are zeros.
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*
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* CCK rates are only valid in legacy table and will only be used in G
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* (2.4 GHz) band.
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*/
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static const u16 expected_tpt_legacy[IWL_RATE_COUNT] = {
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7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0
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};
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/* Expected TpT tables. 4 indexes:
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* 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI
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*/
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static const u16 expected_tpt_siso_20MHz[4][IWL_RATE_COUNT] = {
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{0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0},
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{0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0},
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{0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0},
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{0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0},
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};
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static const u16 expected_tpt_siso_40MHz[4][IWL_RATE_COUNT] = {
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{0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275},
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{0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280},
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{0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173},
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{0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284},
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};
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static const u16 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = {
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{0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308},
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{0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312},
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{0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466},
|
|
{0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691},
|
|
};
|
|
|
|
static const u16 expected_tpt_siso_160MHz[4][IWL_RATE_COUNT] = {
|
|
{0, 0, 0, 0, 191, 0, 244, 288, 298, 308, 313, 318, 323, 328, 330},
|
|
{0, 0, 0, 0, 200, 0, 251, 293, 302, 312, 317, 322, 327, 332, 334},
|
|
{0, 0, 0, 0, 439, 0, 875, 1307, 1736, 2584, 3419, 3831, 4240, 5049, 5581},
|
|
{0, 0, 0, 0, 488, 0, 972, 1451, 1925, 2864, 3785, 4240, 4691, 5581, 6165},
|
|
};
|
|
|
|
static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = {
|
|
{0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0},
|
|
{0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0},
|
|
{0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0},
|
|
{0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0},
|
|
};
|
|
|
|
static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = {
|
|
{0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300},
|
|
{0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303},
|
|
{0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053},
|
|
{0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221},
|
|
};
|
|
|
|
static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = {
|
|
{0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319},
|
|
{0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320},
|
|
{0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219},
|
|
{0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545},
|
|
};
|
|
|
|
static const u16 expected_tpt_mimo2_160MHz[4][IWL_RATE_COUNT] = {
|
|
{0, 0, 0, 0, 240, 0, 278, 308, 313, 319, 322, 324, 328, 330, 334},
|
|
{0, 0, 0, 0, 247, 0, 282, 310, 315, 320, 323, 325, 329, 332, 338},
|
|
{0, 0, 0, 0, 875, 0, 1735, 2582, 3414, 5043, 6619, 7389, 8147, 9629, 10592},
|
|
{0, 0, 0, 0, 971, 0, 1925, 2861, 3779, 5574, 7304, 8147, 8976, 10592, 11640},
|
|
};
|
|
|
|
/* mbps, mcs */
|
|
static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = {
|
|
{ "1", "BPSK DSSS"},
|
|
{ "2", "QPSK DSSS"},
|
|
{"5.5", "BPSK CCK"},
|
|
{ "11", "QPSK CCK"},
|
|
{ "6", "BPSK 1/2"},
|
|
{ "9", "BPSK 1/2"},
|
|
{ "12", "QPSK 1/2"},
|
|
{ "18", "QPSK 3/4"},
|
|
{ "24", "16QAM 1/2"},
|
|
{ "36", "16QAM 3/4"},
|
|
{ "48", "64QAM 2/3"},
|
|
{ "54", "64QAM 3/4"},
|
|
{ "60", "64QAM 5/6"},
|
|
};
|
|
|
|
#define MCS_INDEX_PER_STREAM (8)
|
|
|
|
static const char *rs_pretty_ant(u8 ant)
|
|
{
|
|
static const char * const ant_name[] = {
|
|
[ANT_NONE] = "None",
|
|
[ANT_A] = "A",
|
|
[ANT_B] = "B",
|
|
[ANT_AB] = "AB",
|
|
[ANT_C] = "C",
|
|
[ANT_AC] = "AC",
|
|
[ANT_BC] = "BC",
|
|
[ANT_ABC] = "ABC",
|
|
};
|
|
|
|
if (ant > ANT_ABC)
|
|
return "UNKNOWN";
|
|
|
|
return ant_name[ant];
|
|
}
|
|
|
|
static const char *rs_pretty_lq_type(enum iwl_table_type type)
|
|
{
|
|
static const char * const lq_types[] = {
|
|
[LQ_NONE] = "NONE",
|
|
[LQ_LEGACY_A] = "LEGACY_A",
|
|
[LQ_LEGACY_G] = "LEGACY_G",
|
|
[LQ_HT_SISO] = "HT SISO",
|
|
[LQ_HT_MIMO2] = "HT MIMO",
|
|
[LQ_VHT_SISO] = "VHT SISO",
|
|
[LQ_VHT_MIMO2] = "VHT MIMO",
|
|
};
|
|
|
|
if (type < LQ_NONE || type >= LQ_MAX)
|
|
return "UNKNOWN";
|
|
|
|
return lq_types[type];
|
|
}
|
|
|
|
static char *rs_pretty_rate(const struct rs_rate *rate)
|
|
{
|
|
static char buf[40];
|
|
static const char * const legacy_rates[] = {
|
|
[IWL_RATE_1M_INDEX] = "1M",
|
|
[IWL_RATE_2M_INDEX] = "2M",
|
|
[IWL_RATE_5M_INDEX] = "5.5M",
|
|
[IWL_RATE_11M_INDEX] = "11M",
|
|
[IWL_RATE_6M_INDEX] = "6M",
|
|
[IWL_RATE_9M_INDEX] = "9M",
|
|
[IWL_RATE_12M_INDEX] = "12M",
|
|
[IWL_RATE_18M_INDEX] = "18M",
|
|
[IWL_RATE_24M_INDEX] = "24M",
|
|
[IWL_RATE_36M_INDEX] = "36M",
|
|
[IWL_RATE_48M_INDEX] = "48M",
|
|
[IWL_RATE_54M_INDEX] = "54M",
|
|
};
|
|
static const char *const ht_vht_rates[] = {
|
|
[IWL_RATE_MCS_0_INDEX] = "MCS0",
|
|
[IWL_RATE_MCS_1_INDEX] = "MCS1",
|
|
[IWL_RATE_MCS_2_INDEX] = "MCS2",
|
|
[IWL_RATE_MCS_3_INDEX] = "MCS3",
|
|
[IWL_RATE_MCS_4_INDEX] = "MCS4",
|
|
[IWL_RATE_MCS_5_INDEX] = "MCS5",
|
|
[IWL_RATE_MCS_6_INDEX] = "MCS6",
|
|
[IWL_RATE_MCS_7_INDEX] = "MCS7",
|
|
[IWL_RATE_MCS_8_INDEX] = "MCS8",
|
|
[IWL_RATE_MCS_9_INDEX] = "MCS9",
|
|
};
|
|
const char *rate_str;
|
|
|
|
if (is_type_legacy(rate->type) && (rate->index <= IWL_RATE_54M_INDEX))
|
|
rate_str = legacy_rates[rate->index];
|
|
else if ((is_type_ht(rate->type) || is_type_vht(rate->type)) &&
|
|
(rate->index >= IWL_RATE_MCS_0_INDEX) &&
|
|
(rate->index <= IWL_RATE_MCS_9_INDEX))
|
|
rate_str = ht_vht_rates[rate->index];
|
|
else
|
|
rate_str = "BAD_RATE";
|
|
|
|
sprintf(buf, "(%s|%s|%s)", rs_pretty_lq_type(rate->type),
|
|
rs_pretty_ant(rate->ant), rate_str);
|
|
return buf;
|
|
}
|
|
|
|
static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate,
|
|
const char *prefix)
|
|
{
|
|
IWL_DEBUG_RATE(mvm,
|
|
"%s: %s BW: %d SGI: %d LDPC: %d STBC: %d\n",
|
|
prefix, rs_pretty_rate(rate), rate->bw,
|
|
rate->sgi, rate->ldpc, rate->stbc);
|
|
}
|
|
|
|
static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
|
|
{
|
|
window->data = 0;
|
|
window->success_counter = 0;
|
|
window->success_ratio = IWL_INVALID_VALUE;
|
|
window->counter = 0;
|
|
window->average_tpt = IWL_INVALID_VALUE;
|
|
}
|
|
|
|
static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm *mvm,
|
|
struct iwl_scale_tbl_info *tbl)
|
|
{
|
|
int i;
|
|
|
|
IWL_DEBUG_RATE(mvm, "Clearing up window stats\n");
|
|
for (i = 0; i < IWL_RATE_COUNT; i++)
|
|
rs_rate_scale_clear_window(&tbl->win[i]);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(tbl->tpc_win); i++)
|
|
rs_rate_scale_clear_window(&tbl->tpc_win[i]);
|
|
}
|
|
|
|
static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type)
|
|
{
|
|
return (ant_type & valid_antenna) == ant_type;
|
|
}
|
|
|
|
static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm,
|
|
struct iwl_lq_sta *lq_data, u8 tid,
|
|
struct ieee80211_sta *sta)
|
|
{
|
|
int ret = -EAGAIN;
|
|
|
|
IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n",
|
|
sta->addr, tid);
|
|
ret = ieee80211_start_tx_ba_session(sta, tid, 5000);
|
|
if (ret == -EAGAIN) {
|
|
/*
|
|
* driver and mac80211 is out of sync
|
|
* this might be cause by reloading firmware
|
|
* stop the tx ba session here
|
|
*/
|
|
IWL_ERR(mvm, "Fail start Tx agg on tid: %d\n",
|
|
tid);
|
|
ieee80211_stop_tx_ba_session(sta, tid);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void rs_tl_turn_on_agg(struct iwl_mvm *mvm, u8 tid,
|
|
struct iwl_lq_sta *lq_data,
|
|
struct ieee80211_sta *sta)
|
|
{
|
|
if (tid < IWL_MAX_TID_COUNT)
|
|
rs_tl_turn_on_agg_for_tid(mvm, lq_data, tid, sta);
|
|
else
|
|
IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n",
|
|
tid, IWL_MAX_TID_COUNT);
|
|
}
|
|
|
|
static inline int get_num_of_ant_from_rate(u32 rate_n_flags)
|
|
{
|
|
return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) +
|
|
!!(rate_n_flags & RATE_MCS_ANT_B_MSK) +
|
|
!!(rate_n_flags & RATE_MCS_ANT_C_MSK);
|
|
}
|
|
|
|
/*
|
|
* Static function to get the expected throughput from an iwl_scale_tbl_info
|
|
* that wraps a NULL pointer check
|
|
*/
|
|
static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)
|
|
{
|
|
if (tbl->expected_tpt)
|
|
return tbl->expected_tpt[rs_index];
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* rs_collect_tx_data - Update the success/failure sliding window
|
|
*
|
|
* We keep a sliding window of the last 62 packets transmitted
|
|
* at this rate. window->data contains the bitmask of successful
|
|
* packets.
|
|
*/
|
|
static int _rs_collect_tx_data(struct iwl_mvm *mvm,
|
|
struct iwl_scale_tbl_info *tbl,
|
|
int scale_index, int attempts, int successes,
|
|
struct iwl_rate_scale_data *window)
|
|
{
|
|
static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1));
|
|
s32 fail_count, tpt;
|
|
|
|
/* Get expected throughput */
|
|
tpt = get_expected_tpt(tbl, scale_index);
|
|
|
|
/*
|
|
* Keep track of only the latest 62 tx frame attempts in this rate's
|
|
* history window; anything older isn't really relevant any more.
|
|
* If we have filled up the sliding window, drop the oldest attempt;
|
|
* if the oldest attempt (highest bit in bitmap) shows "success",
|
|
* subtract "1" from the success counter (this is the main reason
|
|
* we keep these bitmaps!).
|
|
*/
|
|
while (attempts > 0) {
|
|
if (window->counter >= IWL_RATE_MAX_WINDOW) {
|
|
/* remove earliest */
|
|
window->counter = IWL_RATE_MAX_WINDOW - 1;
|
|
|
|
if (window->data & mask) {
|
|
window->data &= ~mask;
|
|
window->success_counter--;
|
|
}
|
|
}
|
|
|
|
/* Increment frames-attempted counter */
|
|
window->counter++;
|
|
|
|
/* Shift bitmap by one frame to throw away oldest history */
|
|
window->data <<= 1;
|
|
|
|
/* Mark the most recent #successes attempts as successful */
|
|
if (successes > 0) {
|
|
window->success_counter++;
|
|
window->data |= 0x1;
|
|
successes--;
|
|
}
|
|
|
|
attempts--;
|
|
}
|
|
|
|
/* Calculate current success ratio, avoid divide-by-0! */
|
|
if (window->counter > 0)
|
|
window->success_ratio = 128 * (100 * window->success_counter)
|
|
/ window->counter;
|
|
else
|
|
window->success_ratio = IWL_INVALID_VALUE;
|
|
|
|
fail_count = window->counter - window->success_counter;
|
|
|
|
/* Calculate average throughput, if we have enough history. */
|
|
if ((fail_count >= IWL_MVM_RS_RATE_MIN_FAILURE_TH) ||
|
|
(window->success_counter >= IWL_MVM_RS_RATE_MIN_SUCCESS_TH))
|
|
window->average_tpt = (window->success_ratio * tpt + 64) / 128;
|
|
else
|
|
window->average_tpt = IWL_INVALID_VALUE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rs_collect_tpc_data(struct iwl_mvm *mvm,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct iwl_scale_tbl_info *tbl,
|
|
int scale_index, int attempts, int successes,
|
|
u8 reduced_txp)
|
|
{
|
|
struct iwl_rate_scale_data *window = NULL;
|
|
|
|
if (WARN_ON_ONCE(reduced_txp > TPC_MAX_REDUCTION))
|
|
return -EINVAL;
|
|
|
|
window = &tbl->tpc_win[reduced_txp];
|
|
return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes,
|
|
window);
|
|
}
|
|
|
|
static int rs_collect_tlc_data(struct iwl_mvm *mvm,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct iwl_scale_tbl_info *tbl,
|
|
int scale_index, int attempts, int successes)
|
|
{
|
|
struct iwl_rate_scale_data *window = NULL;
|
|
|
|
if (scale_index < 0 || scale_index >= IWL_RATE_COUNT)
|
|
return -EINVAL;
|
|
|
|
if (tbl->column != RS_COLUMN_INVALID) {
|
|
struct lq_sta_pers *pers = &lq_sta->pers;
|
|
|
|
pers->tx_stats[tbl->column][scale_index].total += attempts;
|
|
pers->tx_stats[tbl->column][scale_index].success += successes;
|
|
}
|
|
|
|
/* Select window for current tx bit rate */
|
|
window = &(tbl->win[scale_index]);
|
|
return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes,
|
|
window);
|
|
}
|
|
|
|
/* Convert rs_rate object into ucode rate bitmask */
|
|
static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm,
|
|
struct rs_rate *rate)
|
|
{
|
|
u32 ucode_rate = 0;
|
|
int index = rate->index;
|
|
|
|
ucode_rate |= ((rate->ant << RATE_MCS_ANT_POS) &
|
|
RATE_MCS_ANT_ABC_MSK);
|
|
|
|
if (is_legacy(rate)) {
|
|
ucode_rate |= iwl_rates[index].plcp;
|
|
if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE)
|
|
ucode_rate |= RATE_MCS_CCK_MSK;
|
|
return ucode_rate;
|
|
}
|
|
|
|
if (is_ht(rate)) {
|
|
if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) {
|
|
IWL_ERR(mvm, "Invalid HT rate index %d\n", index);
|
|
index = IWL_LAST_HT_RATE;
|
|
}
|
|
ucode_rate |= RATE_MCS_HT_MSK;
|
|
|
|
if (is_ht_siso(rate))
|
|
ucode_rate |= iwl_rates[index].plcp_ht_siso;
|
|
else if (is_ht_mimo2(rate))
|
|
ucode_rate |= iwl_rates[index].plcp_ht_mimo2;
|
|
else
|
|
WARN_ON_ONCE(1);
|
|
} else if (is_vht(rate)) {
|
|
if (index < IWL_FIRST_VHT_RATE || index > IWL_LAST_VHT_RATE) {
|
|
IWL_ERR(mvm, "Invalid VHT rate index %d\n", index);
|
|
index = IWL_LAST_VHT_RATE;
|
|
}
|
|
ucode_rate |= RATE_MCS_VHT_MSK;
|
|
if (is_vht_siso(rate))
|
|
ucode_rate |= iwl_rates[index].plcp_vht_siso;
|
|
else if (is_vht_mimo2(rate))
|
|
ucode_rate |= iwl_rates[index].plcp_vht_mimo2;
|
|
else
|
|
WARN_ON_ONCE(1);
|
|
|
|
} else {
|
|
IWL_ERR(mvm, "Invalid rate->type %d\n", rate->type);
|
|
}
|
|
|
|
if (is_siso(rate) && rate->stbc) {
|
|
/* To enable STBC we need to set both a flag and ANT_AB */
|
|
ucode_rate |= RATE_MCS_ANT_AB_MSK;
|
|
ucode_rate |= RATE_MCS_VHT_STBC_MSK;
|
|
}
|
|
|
|
ucode_rate |= rate->bw;
|
|
if (rate->sgi)
|
|
ucode_rate |= RATE_MCS_SGI_MSK;
|
|
if (rate->ldpc)
|
|
ucode_rate |= RATE_MCS_LDPC_MSK;
|
|
|
|
return ucode_rate;
|
|
}
|
|
|
|
/* Convert a ucode rate into an rs_rate object */
|
|
static int rs_rate_from_ucode_rate(const u32 ucode_rate,
|
|
enum nl80211_band band,
|
|
struct rs_rate *rate)
|
|
{
|
|
u32 ant_msk = ucode_rate & RATE_MCS_ANT_ABC_MSK;
|
|
u8 num_of_ant = get_num_of_ant_from_rate(ucode_rate);
|
|
u8 nss;
|
|
|
|
memset(rate, 0, sizeof(*rate));
|
|
rate->index = iwl_hwrate_to_plcp_idx(ucode_rate);
|
|
|
|
if (rate->index == IWL_RATE_INVALID)
|
|
return -EINVAL;
|
|
|
|
rate->ant = (ant_msk >> RATE_MCS_ANT_POS);
|
|
|
|
/* Legacy */
|
|
if (!(ucode_rate & RATE_MCS_HT_MSK) &&
|
|
!(ucode_rate & RATE_MCS_VHT_MSK)) {
|
|
if (num_of_ant == 1) {
|
|
if (band == NL80211_BAND_5GHZ)
|
|
rate->type = LQ_LEGACY_A;
|
|
else
|
|
rate->type = LQ_LEGACY_G;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* HT or VHT */
|
|
if (ucode_rate & RATE_MCS_SGI_MSK)
|
|
rate->sgi = true;
|
|
if (ucode_rate & RATE_MCS_LDPC_MSK)
|
|
rate->ldpc = true;
|
|
if (ucode_rate & RATE_MCS_VHT_STBC_MSK)
|
|
rate->stbc = true;
|
|
if (ucode_rate & RATE_MCS_BF_MSK)
|
|
rate->bfer = true;
|
|
|
|
rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK;
|
|
|
|
if (ucode_rate & RATE_MCS_HT_MSK) {
|
|
nss = ((ucode_rate & RATE_HT_MCS_NSS_MSK) >>
|
|
RATE_HT_MCS_NSS_POS) + 1;
|
|
|
|
if (nss == 1) {
|
|
rate->type = LQ_HT_SISO;
|
|
WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,
|
|
"stbc %d bfer %d",
|
|
rate->stbc, rate->bfer);
|
|
} else if (nss == 2) {
|
|
rate->type = LQ_HT_MIMO2;
|
|
WARN_ON_ONCE(num_of_ant != 2);
|
|
} else {
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
} else if (ucode_rate & RATE_MCS_VHT_MSK) {
|
|
nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >>
|
|
RATE_VHT_MCS_NSS_POS) + 1;
|
|
|
|
if (nss == 1) {
|
|
rate->type = LQ_VHT_SISO;
|
|
WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,
|
|
"stbc %d bfer %d",
|
|
rate->stbc, rate->bfer);
|
|
} else if (nss == 2) {
|
|
rate->type = LQ_VHT_MIMO2;
|
|
WARN_ON_ONCE(num_of_ant != 2);
|
|
} else {
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
}
|
|
|
|
WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 &&
|
|
!is_vht(rate));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* switch to another antenna/antennas and return 1 */
|
|
/* if no other valid antenna found, return 0 */
|
|
static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate)
|
|
{
|
|
u8 new_ant_type;
|
|
|
|
if (!rate->ant || rate->ant > ANT_ABC)
|
|
return 0;
|
|
|
|
if (!rs_is_valid_ant(valid_ant, rate->ant))
|
|
return 0;
|
|
|
|
new_ant_type = ant_toggle_lookup[rate->ant];
|
|
|
|
while ((new_ant_type != rate->ant) &&
|
|
!rs_is_valid_ant(valid_ant, new_ant_type))
|
|
new_ant_type = ant_toggle_lookup[new_ant_type];
|
|
|
|
if (new_ant_type == rate->ant)
|
|
return 0;
|
|
|
|
rate->ant = new_ant_type;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta,
|
|
struct rs_rate *rate)
|
|
{
|
|
if (is_legacy(rate))
|
|
return lq_sta->active_legacy_rate;
|
|
else if (is_siso(rate))
|
|
return lq_sta->active_siso_rate;
|
|
else if (is_mimo2(rate))
|
|
return lq_sta->active_mimo2_rate;
|
|
|
|
WARN_ON_ONCE(1);
|
|
return 0;
|
|
}
|
|
|
|
static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask,
|
|
int rate_type)
|
|
{
|
|
u8 high = IWL_RATE_INVALID;
|
|
u8 low = IWL_RATE_INVALID;
|
|
|
|
/* 802.11A or ht walks to the next literal adjacent rate in
|
|
* the rate table */
|
|
if (is_type_a_band(rate_type) || !is_type_legacy(rate_type)) {
|
|
int i;
|
|
u32 mask;
|
|
|
|
/* Find the previous rate that is in the rate mask */
|
|
i = index - 1;
|
|
for (mask = (1 << i); i >= 0; i--, mask >>= 1) {
|
|
if (rate_mask & mask) {
|
|
low = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Find the next rate that is in the rate mask */
|
|
i = index + 1;
|
|
for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) {
|
|
if (rate_mask & mask) {
|
|
high = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (high << 8) | low;
|
|
}
|
|
|
|
low = index;
|
|
while (low != IWL_RATE_INVALID) {
|
|
low = iwl_rates[low].prev_rs;
|
|
if (low == IWL_RATE_INVALID)
|
|
break;
|
|
if (rate_mask & (1 << low))
|
|
break;
|
|
}
|
|
|
|
high = index;
|
|
while (high != IWL_RATE_INVALID) {
|
|
high = iwl_rates[high].next_rs;
|
|
if (high == IWL_RATE_INVALID)
|
|
break;
|
|
if (rate_mask & (1 << high))
|
|
break;
|
|
}
|
|
|
|
return (high << 8) | low;
|
|
}
|
|
|
|
static inline bool rs_rate_supported(struct iwl_lq_sta *lq_sta,
|
|
struct rs_rate *rate)
|
|
{
|
|
return BIT(rate->index) & rs_get_supported_rates(lq_sta, rate);
|
|
}
|
|
|
|
/* Get the next supported lower rate in the current column.
|
|
* Return true if bottom rate in the current column was reached
|
|
*/
|
|
static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta,
|
|
struct rs_rate *rate)
|
|
{
|
|
u8 low;
|
|
u16 high_low;
|
|
u16 rate_mask;
|
|
struct iwl_mvm *mvm = lq_sta->pers.drv;
|
|
|
|
rate_mask = rs_get_supported_rates(lq_sta, rate);
|
|
high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask,
|
|
rate->type);
|
|
low = high_low & 0xff;
|
|
|
|
/* Bottom rate of column reached */
|
|
if (low == IWL_RATE_INVALID)
|
|
return true;
|
|
|
|
rate->index = low;
|
|
return false;
|
|
}
|
|
|
|
/* Get the next rate to use following a column downgrade */
|
|
static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta,
|
|
struct rs_rate *rate)
|
|
{
|
|
struct iwl_mvm *mvm = lq_sta->pers.drv;
|
|
|
|
if (is_legacy(rate)) {
|
|
/* No column to downgrade from Legacy */
|
|
return;
|
|
} else if (is_siso(rate)) {
|
|
/* Downgrade to Legacy if we were in SISO */
|
|
if (lq_sta->band == NL80211_BAND_5GHZ)
|
|
rate->type = LQ_LEGACY_A;
|
|
else
|
|
rate->type = LQ_LEGACY_G;
|
|
|
|
rate->bw = RATE_MCS_CHAN_WIDTH_20;
|
|
|
|
WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX ||
|
|
rate->index > IWL_RATE_MCS_9_INDEX);
|
|
|
|
rate->index = rs_ht_to_legacy[rate->index];
|
|
rate->ldpc = false;
|
|
} else {
|
|
/* Downgrade to SISO with same MCS if in MIMO */
|
|
rate->type = is_vht_mimo2(rate) ?
|
|
LQ_VHT_SISO : LQ_HT_SISO;
|
|
}
|
|
|
|
if (num_of_ant(rate->ant) > 1)
|
|
rate->ant = first_antenna(iwl_mvm_get_valid_tx_ant(mvm));
|
|
|
|
/* Relevant in both switching to SISO or Legacy */
|
|
rate->sgi = false;
|
|
|
|
if (!rs_rate_supported(lq_sta, rate))
|
|
rs_get_lower_rate_in_column(lq_sta, rate);
|
|
}
|
|
|
|
/* Check if both rates are identical
|
|
* allow_ant_mismatch enables matching a SISO rate on ANT_A or ANT_B
|
|
* with a rate indicating STBC/BFER and ANT_AB.
|
|
*/
|
|
static inline bool rs_rate_equal(struct rs_rate *a,
|
|
struct rs_rate *b,
|
|
bool allow_ant_mismatch)
|
|
|
|
{
|
|
bool ant_match = (a->ant == b->ant) && (a->stbc == b->stbc) &&
|
|
(a->bfer == b->bfer);
|
|
|
|
if (allow_ant_mismatch) {
|
|
if (a->stbc || a->bfer) {
|
|
WARN_ONCE(a->ant != ANT_AB, "stbc %d bfer %d ant %d",
|
|
a->stbc, a->bfer, a->ant);
|
|
ant_match |= (b->ant == ANT_A || b->ant == ANT_B);
|
|
} else if (b->stbc || b->bfer) {
|
|
WARN_ONCE(b->ant != ANT_AB, "stbc %d bfer %d ant %d",
|
|
b->stbc, b->bfer, b->ant);
|
|
ant_match |= (a->ant == ANT_A || a->ant == ANT_B);
|
|
}
|
|
}
|
|
|
|
return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi) &&
|
|
(a->ldpc == b->ldpc) && (a->index == b->index) && ant_match;
|
|
}
|
|
|
|
/* Check if both rates share the same column */
|
|
static inline bool rs_rate_column_match(struct rs_rate *a,
|
|
struct rs_rate *b)
|
|
{
|
|
bool ant_match;
|
|
|
|
if (a->stbc || a->bfer)
|
|
ant_match = (b->ant == ANT_A || b->ant == ANT_B);
|
|
else
|
|
ant_match = (a->ant == b->ant);
|
|
|
|
return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi)
|
|
&& ant_match;
|
|
}
|
|
|
|
static inline enum rs_column rs_get_column_from_rate(struct rs_rate *rate)
|
|
{
|
|
if (is_legacy(rate)) {
|
|
if (rate->ant == ANT_A)
|
|
return RS_COLUMN_LEGACY_ANT_A;
|
|
|
|
if (rate->ant == ANT_B)
|
|
return RS_COLUMN_LEGACY_ANT_B;
|
|
|
|
goto err;
|
|
}
|
|
|
|
if (is_siso(rate)) {
|
|
if (rate->ant == ANT_A || rate->stbc || rate->bfer)
|
|
return rate->sgi ? RS_COLUMN_SISO_ANT_A_SGI :
|
|
RS_COLUMN_SISO_ANT_A;
|
|
|
|
if (rate->ant == ANT_B)
|
|
return rate->sgi ? RS_COLUMN_SISO_ANT_B_SGI :
|
|
RS_COLUMN_SISO_ANT_B;
|
|
|
|
goto err;
|
|
}
|
|
|
|
if (is_mimo(rate))
|
|
return rate->sgi ? RS_COLUMN_MIMO2_SGI : RS_COLUMN_MIMO2;
|
|
|
|
err:
|
|
return RS_COLUMN_INVALID;
|
|
}
|
|
|
|
static u8 rs_get_tid(struct ieee80211_hdr *hdr)
|
|
{
|
|
u8 tid = IWL_MAX_TID_COUNT;
|
|
|
|
if (ieee80211_is_data_qos(hdr->frame_control)) {
|
|
u8 *qc = ieee80211_get_qos_ctl(hdr);
|
|
tid = qc[0] & 0xf;
|
|
}
|
|
|
|
if (unlikely(tid > IWL_MAX_TID_COUNT))
|
|
tid = IWL_MAX_TID_COUNT;
|
|
|
|
return tid;
|
|
}
|
|
|
|
void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
|
|
int tid, struct ieee80211_tx_info *info, bool ndp)
|
|
{
|
|
int legacy_success;
|
|
int retries;
|
|
int i;
|
|
struct iwl_lq_cmd *table;
|
|
u32 lq_hwrate;
|
|
struct rs_rate lq_rate, tx_resp_rate;
|
|
struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;
|
|
u8 reduced_txp = (uintptr_t)info->status.status_driver_data[0];
|
|
u32 tx_resp_hwrate = (uintptr_t)info->status.status_driver_data[1];
|
|
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
|
|
struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta;
|
|
bool allow_ant_mismatch = fw_has_api(&mvm->fw->ucode_capa,
|
|
IWL_UCODE_TLV_API_LQ_SS_PARAMS);
|
|
|
|
/* Treat uninitialized rate scaling data same as non-existing. */
|
|
if (!lq_sta) {
|
|
IWL_DEBUG_RATE(mvm, "Station rate scaling not created yet.\n");
|
|
return;
|
|
} else if (!lq_sta->pers.drv) {
|
|
IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n");
|
|
return;
|
|
}
|
|
|
|
/* This packet was aggregated but doesn't carry status info */
|
|
if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
|
|
!(info->flags & IEEE80211_TX_STAT_AMPDU))
|
|
return;
|
|
|
|
if (rs_rate_from_ucode_rate(tx_resp_hwrate, info->band,
|
|
&tx_resp_rate)) {
|
|
WARN_ON_ONCE(1);
|
|
return;
|
|
}
|
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
/* Disable last tx check if we are debugging with fixed rate but
|
|
* update tx stats */
|
|
if (lq_sta->pers.dbg_fixed_rate) {
|
|
int index = tx_resp_rate.index;
|
|
enum rs_column column;
|
|
int attempts, success;
|
|
|
|
column = rs_get_column_from_rate(&tx_resp_rate);
|
|
if (WARN_ONCE(column == RS_COLUMN_INVALID,
|
|
"Can't map rate 0x%x to column",
|
|
tx_resp_hwrate))
|
|
return;
|
|
|
|
if (info->flags & IEEE80211_TX_STAT_AMPDU) {
|
|
attempts = info->status.ampdu_len;
|
|
success = info->status.ampdu_ack_len;
|
|
} else {
|
|
attempts = info->status.rates[0].count;
|
|
success = !!(info->flags & IEEE80211_TX_STAT_ACK);
|
|
}
|
|
|
|
lq_sta->pers.tx_stats[column][index].total += attempts;
|
|
lq_sta->pers.tx_stats[column][index].success += success;
|
|
|
|
IWL_DEBUG_RATE(mvm, "Fixed rate 0x%x success %d attempts %d\n",
|
|
tx_resp_hwrate, success, attempts);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
if (time_after(jiffies,
|
|
(unsigned long)(lq_sta->last_tx +
|
|
(IWL_MVM_RS_IDLE_TIMEOUT * HZ)))) {
|
|
int t;
|
|
|
|
IWL_DEBUG_RATE(mvm, "Tx idle for too long. reinit rs\n");
|
|
for (t = 0; t < IWL_MAX_TID_COUNT; t++)
|
|
ieee80211_stop_tx_ba_session(sta, t);
|
|
|
|
iwl_mvm_rs_rate_init(mvm, sta, info->band, false);
|
|
return;
|
|
}
|
|
lq_sta->last_tx = jiffies;
|
|
|
|
/* Ignore this Tx frame response if its initial rate doesn't match
|
|
* that of latest Link Quality command. There may be stragglers
|
|
* from a previous Link Quality command, but we're no longer interested
|
|
* in those; they're either from the "active" mode while we're trying
|
|
* to check "search" mode, or a prior "search" mode after we've moved
|
|
* to a new "search" mode (which might become the new "active" mode).
|
|
*/
|
|
table = &lq_sta->lq;
|
|
lq_hwrate = le32_to_cpu(table->rs_table[0]);
|
|
if (rs_rate_from_ucode_rate(lq_hwrate, info->band, &lq_rate)) {
|
|
WARN_ON_ONCE(1);
|
|
return;
|
|
}
|
|
|
|
/* Here we actually compare this rate to the latest LQ command */
|
|
if (!rs_rate_equal(&tx_resp_rate, &lq_rate, allow_ant_mismatch)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"initial tx resp rate 0x%x does not match 0x%x\n",
|
|
tx_resp_hwrate, lq_hwrate);
|
|
|
|
/*
|
|
* Since rates mis-match, the last LQ command may have failed.
|
|
* After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with
|
|
* ... driver.
|
|
*/
|
|
lq_sta->missed_rate_counter++;
|
|
if (lq_sta->missed_rate_counter > IWL_MVM_RS_MISSED_RATE_MAX) {
|
|
lq_sta->missed_rate_counter = 0;
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Too many rates mismatch. Send sync LQ. rs_state %d\n",
|
|
lq_sta->rs_state);
|
|
iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false);
|
|
}
|
|
/* Regardless, ignore this status info for outdated rate */
|
|
return;
|
|
} else
|
|
/* Rate did match, so reset the missed_rate_counter */
|
|
lq_sta->missed_rate_counter = 0;
|
|
|
|
if (!lq_sta->search_better_tbl) {
|
|
curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
|
|
} else {
|
|
curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
|
|
other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
}
|
|
|
|
if (WARN_ON_ONCE(!rs_rate_column_match(&lq_rate, &curr_tbl->rate))) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Neither active nor search matches tx rate\n");
|
|
tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
rs_dump_rate(mvm, &tmp_tbl->rate, "ACTIVE");
|
|
tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
|
|
rs_dump_rate(mvm, &tmp_tbl->rate, "SEARCH");
|
|
rs_dump_rate(mvm, &lq_rate, "ACTUAL");
|
|
|
|
/*
|
|
* no matching table found, let's by-pass the data collection
|
|
* and continue to perform rate scale to find the rate table
|
|
*/
|
|
rs_stay_in_table(lq_sta, true);
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Updating the frame history depends on whether packets were
|
|
* aggregated.
|
|
*
|
|
* For aggregation, all packets were transmitted at the same rate, the
|
|
* first index into rate scale table.
|
|
*/
|
|
if (info->flags & IEEE80211_TX_STAT_AMPDU) {
|
|
rs_collect_tpc_data(mvm, lq_sta, curr_tbl, lq_rate.index,
|
|
info->status.ampdu_len,
|
|
info->status.ampdu_ack_len,
|
|
reduced_txp);
|
|
|
|
/* ampdu_ack_len = 0 marks no BA was received. For TLC, treat
|
|
* it as a single frame loss as we don't want the success ratio
|
|
* to dip too quickly because a BA wasn't received.
|
|
* For TPC, there's no need for this optimisation since we want
|
|
* to recover very quickly from a bad power reduction and,
|
|
* therefore we'd like the success ratio to get an immediate hit
|
|
* when failing to get a BA, so we'd switch back to a lower or
|
|
* zero power reduction. When FW transmits agg with a rate
|
|
* different from the initial rate, it will not use reduced txp
|
|
* and will send BA notification twice (one empty with reduced
|
|
* txp equal to the value from LQ and one with reduced txp 0).
|
|
* We need to update counters for each txp level accordingly.
|
|
*/
|
|
if (info->status.ampdu_ack_len == 0)
|
|
info->status.ampdu_len = 1;
|
|
|
|
rs_collect_tlc_data(mvm, lq_sta, curr_tbl, lq_rate.index,
|
|
info->status.ampdu_len,
|
|
info->status.ampdu_ack_len);
|
|
|
|
/* Update success/fail counts if not searching for new mode */
|
|
if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
|
|
lq_sta->total_success += info->status.ampdu_ack_len;
|
|
lq_sta->total_failed += (info->status.ampdu_len -
|
|
info->status.ampdu_ack_len);
|
|
}
|
|
} else {
|
|
/* For legacy, update frame history with for each Tx retry. */
|
|
retries = info->status.rates[0].count - 1;
|
|
/* HW doesn't send more than 15 retries */
|
|
retries = min(retries, 15);
|
|
|
|
/* The last transmission may have been successful */
|
|
legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK);
|
|
/* Collect data for each rate used during failed TX attempts */
|
|
for (i = 0; i <= retries; ++i) {
|
|
lq_hwrate = le32_to_cpu(table->rs_table[i]);
|
|
if (rs_rate_from_ucode_rate(lq_hwrate, info->band,
|
|
&lq_rate)) {
|
|
WARN_ON_ONCE(1);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Only collect stats if retried rate is in the same RS
|
|
* table as active/search.
|
|
*/
|
|
if (rs_rate_column_match(&lq_rate, &curr_tbl->rate))
|
|
tmp_tbl = curr_tbl;
|
|
else if (rs_rate_column_match(&lq_rate,
|
|
&other_tbl->rate))
|
|
tmp_tbl = other_tbl;
|
|
else
|
|
continue;
|
|
|
|
rs_collect_tpc_data(mvm, lq_sta, tmp_tbl,
|
|
lq_rate.index, 1,
|
|
i < retries ? 0 : legacy_success,
|
|
reduced_txp);
|
|
rs_collect_tlc_data(mvm, lq_sta, tmp_tbl,
|
|
lq_rate.index, 1,
|
|
i < retries ? 0 : legacy_success);
|
|
}
|
|
|
|
/* Update success/fail counts if not searching for new mode */
|
|
if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
|
|
lq_sta->total_success += legacy_success;
|
|
lq_sta->total_failed += retries + (1 - legacy_success);
|
|
}
|
|
}
|
|
/* The last TX rate is cached in lq_sta; it's set in if/else above */
|
|
lq_sta->last_rate_n_flags = lq_hwrate;
|
|
IWL_DEBUG_RATE(mvm, "reduced txpower: %d\n", reduced_txp);
|
|
done:
|
|
/* See if there's a better rate or modulation mode to try. */
|
|
if (sta->supp_rates[info->band])
|
|
rs_rate_scale_perform(mvm, sta, lq_sta, tid, ndp);
|
|
}
|
|
|
|
/*
|
|
* mac80211 sends us Tx status
|
|
*/
|
|
static void rs_mac80211_tx_status(void *mvm_r,
|
|
struct ieee80211_supported_band *sband,
|
|
struct ieee80211_sta *sta, void *priv_sta,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
|
|
struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_r;
|
|
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
|
|
if (!iwl_mvm_sta_from_mac80211(sta)->vif)
|
|
return;
|
|
|
|
if (!ieee80211_is_data(hdr->frame_control) ||
|
|
info->flags & IEEE80211_TX_CTL_NO_ACK)
|
|
return;
|
|
|
|
iwl_mvm_rs_tx_status(mvm, sta, rs_get_tid(hdr), info,
|
|
ieee80211_is_qos_nullfunc(hdr->frame_control));
|
|
}
|
|
|
|
/*
|
|
* Begin a period of staying with a selected modulation mode.
|
|
* Set "stay_in_tbl" flag to prevent any mode switches.
|
|
* Set frame tx success limits according to legacy vs. high-throughput,
|
|
* and reset overall (spanning all rates) tx success history statistics.
|
|
* These control how long we stay using same modulation mode before
|
|
* searching for a new mode.
|
|
*/
|
|
static void rs_set_stay_in_table(struct iwl_mvm *mvm, u8 is_legacy,
|
|
struct iwl_lq_sta *lq_sta)
|
|
{
|
|
IWL_DEBUG_RATE(mvm, "Moving to RS_STATE_STAY_IN_COLUMN\n");
|
|
lq_sta->rs_state = RS_STATE_STAY_IN_COLUMN;
|
|
if (is_legacy) {
|
|
lq_sta->table_count_limit = IWL_MVM_RS_LEGACY_TABLE_COUNT;
|
|
lq_sta->max_failure_limit = IWL_MVM_RS_LEGACY_FAILURE_LIMIT;
|
|
lq_sta->max_success_limit = IWL_MVM_RS_LEGACY_SUCCESS_LIMIT;
|
|
} else {
|
|
lq_sta->table_count_limit = IWL_MVM_RS_NON_LEGACY_TABLE_COUNT;
|
|
lq_sta->max_failure_limit = IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT;
|
|
lq_sta->max_success_limit = IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT;
|
|
}
|
|
lq_sta->table_count = 0;
|
|
lq_sta->total_failed = 0;
|
|
lq_sta->total_success = 0;
|
|
lq_sta->flush_timer = jiffies;
|
|
lq_sta->visited_columns = 0;
|
|
}
|
|
|
|
static inline int rs_get_max_rate_from_mask(unsigned long rate_mask)
|
|
{
|
|
if (rate_mask)
|
|
return find_last_bit(&rate_mask, BITS_PER_LONG);
|
|
return IWL_RATE_INVALID;
|
|
}
|
|
|
|
static int rs_get_max_allowed_rate(struct iwl_lq_sta *lq_sta,
|
|
const struct rs_tx_column *column)
|
|
{
|
|
switch (column->mode) {
|
|
case RS_LEGACY:
|
|
return lq_sta->max_legacy_rate_idx;
|
|
case RS_SISO:
|
|
return lq_sta->max_siso_rate_idx;
|
|
case RS_MIMO2:
|
|
return lq_sta->max_mimo2_rate_idx;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
|
|
return lq_sta->max_legacy_rate_idx;
|
|
}
|
|
|
|
static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta,
|
|
const struct rs_tx_column *column,
|
|
u32 bw)
|
|
{
|
|
/* Used to choose among HT tables */
|
|
const u16 (*ht_tbl_pointer)[IWL_RATE_COUNT];
|
|
|
|
if (WARN_ON_ONCE(column->mode != RS_LEGACY &&
|
|
column->mode != RS_SISO &&
|
|
column->mode != RS_MIMO2))
|
|
return expected_tpt_legacy;
|
|
|
|
/* Legacy rates have only one table */
|
|
if (column->mode == RS_LEGACY)
|
|
return expected_tpt_legacy;
|
|
|
|
ht_tbl_pointer = expected_tpt_mimo2_20MHz;
|
|
/* Choose among many HT tables depending on number of streams
|
|
* (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation
|
|
* status */
|
|
if (column->mode == RS_SISO) {
|
|
switch (bw) {
|
|
case RATE_MCS_CHAN_WIDTH_20:
|
|
ht_tbl_pointer = expected_tpt_siso_20MHz;
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_40:
|
|
ht_tbl_pointer = expected_tpt_siso_40MHz;
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_80:
|
|
ht_tbl_pointer = expected_tpt_siso_80MHz;
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_160:
|
|
ht_tbl_pointer = expected_tpt_siso_160MHz;
|
|
break;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
} else if (column->mode == RS_MIMO2) {
|
|
switch (bw) {
|
|
case RATE_MCS_CHAN_WIDTH_20:
|
|
ht_tbl_pointer = expected_tpt_mimo2_20MHz;
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_40:
|
|
ht_tbl_pointer = expected_tpt_mimo2_40MHz;
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_80:
|
|
ht_tbl_pointer = expected_tpt_mimo2_80MHz;
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_160:
|
|
ht_tbl_pointer = expected_tpt_mimo2_160MHz;
|
|
break;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
} else {
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
|
|
if (!column->sgi && !lq_sta->is_agg) /* Normal */
|
|
return ht_tbl_pointer[0];
|
|
else if (column->sgi && !lq_sta->is_agg) /* SGI */
|
|
return ht_tbl_pointer[1];
|
|
else if (!column->sgi && lq_sta->is_agg) /* AGG */
|
|
return ht_tbl_pointer[2];
|
|
else /* AGG+SGI */
|
|
return ht_tbl_pointer[3];
|
|
}
|
|
|
|
static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta,
|
|
struct iwl_scale_tbl_info *tbl)
|
|
{
|
|
struct rs_rate *rate = &tbl->rate;
|
|
const struct rs_tx_column *column = &rs_tx_columns[tbl->column];
|
|
|
|
tbl->expected_tpt = rs_get_expected_tpt_table(lq_sta, column, rate->bw);
|
|
}
|
|
|
|
static s32 rs_get_best_rate(struct iwl_mvm *mvm,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct iwl_scale_tbl_info *tbl, /* "search" */
|
|
unsigned long rate_mask, s8 index)
|
|
{
|
|
struct iwl_scale_tbl_info *active_tbl =
|
|
&(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
s32 success_ratio = active_tbl->win[index].success_ratio;
|
|
u16 expected_current_tpt = active_tbl->expected_tpt[index];
|
|
const u16 *tpt_tbl = tbl->expected_tpt;
|
|
u16 high_low;
|
|
u32 target_tpt;
|
|
int rate_idx;
|
|
|
|
if (success_ratio >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {
|
|
target_tpt = 100 * expected_current_tpt;
|
|
IWL_DEBUG_RATE(mvm,
|
|
"SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n",
|
|
success_ratio, target_tpt);
|
|
} else {
|
|
target_tpt = lq_sta->last_tpt;
|
|
IWL_DEBUG_RATE(mvm,
|
|
"SR %d not that good. Find rate exceeding ACTUAL_TPT %d\n",
|
|
success_ratio, target_tpt);
|
|
}
|
|
|
|
rate_idx = find_first_bit(&rate_mask, BITS_PER_LONG);
|
|
|
|
while (rate_idx != IWL_RATE_INVALID) {
|
|
if (target_tpt < (100 * tpt_tbl[rate_idx]))
|
|
break;
|
|
|
|
high_low = rs_get_adjacent_rate(mvm, rate_idx, rate_mask,
|
|
tbl->rate.type);
|
|
|
|
rate_idx = (high_low >> 8) & 0xff;
|
|
}
|
|
|
|
IWL_DEBUG_RATE(mvm, "Best rate found %d target_tp %d expected_new %d\n",
|
|
rate_idx, target_tpt,
|
|
rate_idx != IWL_RATE_INVALID ?
|
|
100 * tpt_tbl[rate_idx] : IWL_INVALID_VALUE);
|
|
|
|
return rate_idx;
|
|
}
|
|
|
|
static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta)
|
|
{
|
|
switch (sta->bandwidth) {
|
|
case IEEE80211_STA_RX_BW_160:
|
|
return RATE_MCS_CHAN_WIDTH_160;
|
|
case IEEE80211_STA_RX_BW_80:
|
|
return RATE_MCS_CHAN_WIDTH_80;
|
|
case IEEE80211_STA_RX_BW_40:
|
|
return RATE_MCS_CHAN_WIDTH_40;
|
|
case IEEE80211_STA_RX_BW_20:
|
|
default:
|
|
return RATE_MCS_CHAN_WIDTH_20;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check whether we should continue using same modulation mode, or
|
|
* begin search for a new mode, based on:
|
|
* 1) # tx successes or failures while using this mode
|
|
* 2) # times calling this function
|
|
* 3) elapsed time in this mode (not used, for now)
|
|
*/
|
|
static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search)
|
|
{
|
|
struct iwl_scale_tbl_info *tbl;
|
|
int active_tbl;
|
|
int flush_interval_passed = 0;
|
|
struct iwl_mvm *mvm;
|
|
|
|
mvm = lq_sta->pers.drv;
|
|
active_tbl = lq_sta->active_tbl;
|
|
|
|
tbl = &(lq_sta->lq_info[active_tbl]);
|
|
|
|
/* If we've been disallowing search, see if we should now allow it */
|
|
if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
|
|
/* Elapsed time using current modulation mode */
|
|
if (lq_sta->flush_timer)
|
|
flush_interval_passed =
|
|
time_after(jiffies,
|
|
(unsigned long)(lq_sta->flush_timer +
|
|
(IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT * HZ)));
|
|
|
|
/*
|
|
* Check if we should allow search for new modulation mode.
|
|
* If many frames have failed or succeeded, or we've used
|
|
* this same modulation for a long time, allow search, and
|
|
* reset history stats that keep track of whether we should
|
|
* allow a new search. Also (below) reset all bitmaps and
|
|
* stats in active history.
|
|
*/
|
|
if (force_search ||
|
|
(lq_sta->total_failed > lq_sta->max_failure_limit) ||
|
|
(lq_sta->total_success > lq_sta->max_success_limit) ||
|
|
((!lq_sta->search_better_tbl) &&
|
|
(lq_sta->flush_timer) && (flush_interval_passed))) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"LQ: stay is expired %d %d %d\n",
|
|
lq_sta->total_failed,
|
|
lq_sta->total_success,
|
|
flush_interval_passed);
|
|
|
|
/* Allow search for new mode */
|
|
lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_STARTED;
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Moving to RS_STATE_SEARCH_CYCLE_STARTED\n");
|
|
lq_sta->total_failed = 0;
|
|
lq_sta->total_success = 0;
|
|
lq_sta->flush_timer = 0;
|
|
/* mark the current column as visited */
|
|
lq_sta->visited_columns = BIT(tbl->column);
|
|
/*
|
|
* Else if we've used this modulation mode enough repetitions
|
|
* (regardless of elapsed time or success/failure), reset
|
|
* history bitmaps and rate-specific stats for all rates in
|
|
* active table.
|
|
*/
|
|
} else {
|
|
lq_sta->table_count++;
|
|
if (lq_sta->table_count >=
|
|
lq_sta->table_count_limit) {
|
|
lq_sta->table_count = 0;
|
|
|
|
IWL_DEBUG_RATE(mvm,
|
|
"LQ: stay in table clear win\n");
|
|
rs_rate_scale_clear_tbl_windows(mvm, tbl);
|
|
}
|
|
}
|
|
|
|
/* If transitioning to allow "search", reset all history
|
|
* bitmaps and stats in active table (this will become the new
|
|
* "search" table). */
|
|
if (lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED) {
|
|
rs_rate_scale_clear_tbl_windows(mvm, tbl);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void rs_set_amsdu_len(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
|
|
struct iwl_scale_tbl_info *tbl,
|
|
enum rs_action scale_action)
|
|
{
|
|
struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta);
|
|
|
|
if ((!is_vht(&tbl->rate) && !is_ht(&tbl->rate)) ||
|
|
tbl->rate.index < IWL_RATE_MCS_5_INDEX ||
|
|
scale_action == RS_ACTION_DOWNSCALE)
|
|
sta_priv->tlc_amsdu = false;
|
|
else
|
|
sta_priv->tlc_amsdu = true;
|
|
}
|
|
|
|
/*
|
|
* setup rate table in uCode
|
|
*/
|
|
static void rs_update_rate_tbl(struct iwl_mvm *mvm,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct iwl_scale_tbl_info *tbl)
|
|
{
|
|
rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate);
|
|
iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false);
|
|
}
|
|
|
|
static bool rs_tweak_rate_tbl(struct iwl_mvm *mvm,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct iwl_scale_tbl_info *tbl,
|
|
enum rs_action scale_action)
|
|
{
|
|
if (sta->bandwidth != IEEE80211_STA_RX_BW_80)
|
|
return false;
|
|
|
|
if (!is_vht_siso(&tbl->rate))
|
|
return false;
|
|
|
|
if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_80) &&
|
|
(tbl->rate.index == IWL_RATE_MCS_0_INDEX) &&
|
|
(scale_action == RS_ACTION_DOWNSCALE)) {
|
|
tbl->rate.bw = RATE_MCS_CHAN_WIDTH_20;
|
|
tbl->rate.index = IWL_RATE_MCS_4_INDEX;
|
|
IWL_DEBUG_RATE(mvm, "Switch 80Mhz SISO MCS0 -> 20Mhz MCS4\n");
|
|
goto tweaked;
|
|
}
|
|
|
|
/* Go back to 80Mhz MCS1 only if we've established that 20Mhz MCS5 is
|
|
* sustainable, i.e. we're past the test window. We can't go back
|
|
* if MCS5 is just tested as this will happen always after switching
|
|
* to 20Mhz MCS4 because the rate stats are cleared.
|
|
*/
|
|
if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_20) &&
|
|
(((tbl->rate.index == IWL_RATE_MCS_5_INDEX) &&
|
|
(scale_action == RS_ACTION_STAY)) ||
|
|
((tbl->rate.index > IWL_RATE_MCS_5_INDEX) &&
|
|
(scale_action == RS_ACTION_UPSCALE)))) {
|
|
tbl->rate.bw = RATE_MCS_CHAN_WIDTH_80;
|
|
tbl->rate.index = IWL_RATE_MCS_1_INDEX;
|
|
IWL_DEBUG_RATE(mvm, "Switch 20Mhz SISO MCS5 -> 80Mhz MCS1\n");
|
|
goto tweaked;
|
|
}
|
|
|
|
return false;
|
|
|
|
tweaked:
|
|
rs_set_expected_tpt_table(lq_sta, tbl);
|
|
rs_rate_scale_clear_tbl_windows(mvm, tbl);
|
|
return true;
|
|
}
|
|
|
|
static enum rs_column rs_get_next_column(struct iwl_mvm *mvm,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_scale_tbl_info *tbl)
|
|
{
|
|
int i, j, max_rate;
|
|
enum rs_column next_col_id;
|
|
const struct rs_tx_column *curr_col = &rs_tx_columns[tbl->column];
|
|
const struct rs_tx_column *next_col;
|
|
allow_column_func_t allow_func;
|
|
u8 valid_ants = iwl_mvm_get_valid_tx_ant(mvm);
|
|
const u16 *expected_tpt_tbl;
|
|
u16 tpt, max_expected_tpt;
|
|
|
|
for (i = 0; i < MAX_NEXT_COLUMNS; i++) {
|
|
next_col_id = curr_col->next_columns[i];
|
|
|
|
if (next_col_id == RS_COLUMN_INVALID)
|
|
continue;
|
|
|
|
if (lq_sta->visited_columns & BIT(next_col_id)) {
|
|
IWL_DEBUG_RATE(mvm, "Skip already visited column %d\n",
|
|
next_col_id);
|
|
continue;
|
|
}
|
|
|
|
next_col = &rs_tx_columns[next_col_id];
|
|
|
|
if (!rs_is_valid_ant(valid_ants, next_col->ant)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n",
|
|
next_col_id, valid_ants, next_col->ant);
|
|
continue;
|
|
}
|
|
|
|
for (j = 0; j < MAX_COLUMN_CHECKS; j++) {
|
|
allow_func = next_col->checks[j];
|
|
if (allow_func && !allow_func(mvm, sta, &tbl->rate,
|
|
next_col))
|
|
break;
|
|
}
|
|
|
|
if (j != MAX_COLUMN_CHECKS) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Skip column %d: not allowed (check %d failed)\n",
|
|
next_col_id, j);
|
|
|
|
continue;
|
|
}
|
|
|
|
tpt = lq_sta->last_tpt / 100;
|
|
expected_tpt_tbl = rs_get_expected_tpt_table(lq_sta, next_col,
|
|
rs_bw_from_sta_bw(sta));
|
|
if (WARN_ON_ONCE(!expected_tpt_tbl))
|
|
continue;
|
|
|
|
max_rate = rs_get_max_allowed_rate(lq_sta, next_col);
|
|
if (max_rate == IWL_RATE_INVALID) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Skip column %d: no rate is allowed in this column\n",
|
|
next_col_id);
|
|
continue;
|
|
}
|
|
|
|
max_expected_tpt = expected_tpt_tbl[max_rate];
|
|
if (tpt >= max_expected_tpt) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Skip column %d: can't beat current TPT. Max expected %d current %d\n",
|
|
next_col_id, max_expected_tpt, tpt);
|
|
continue;
|
|
}
|
|
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Found potential column %d. Max expected %d current %d\n",
|
|
next_col_id, max_expected_tpt, tpt);
|
|
break;
|
|
}
|
|
|
|
if (i == MAX_NEXT_COLUMNS)
|
|
return RS_COLUMN_INVALID;
|
|
|
|
return next_col_id;
|
|
}
|
|
|
|
static int rs_switch_to_column(struct iwl_mvm *mvm,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_sta *sta,
|
|
enum rs_column col_id)
|
|
{
|
|
struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
struct iwl_scale_tbl_info *search_tbl =
|
|
&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
|
|
struct rs_rate *rate = &search_tbl->rate;
|
|
const struct rs_tx_column *column = &rs_tx_columns[col_id];
|
|
const struct rs_tx_column *curr_column = &rs_tx_columns[tbl->column];
|
|
unsigned long rate_mask = 0;
|
|
u32 rate_idx = 0;
|
|
|
|
memcpy(search_tbl, tbl, offsetof(struct iwl_scale_tbl_info, win));
|
|
|
|
rate->sgi = column->sgi;
|
|
rate->ant = column->ant;
|
|
|
|
if (column->mode == RS_LEGACY) {
|
|
if (lq_sta->band == NL80211_BAND_5GHZ)
|
|
rate->type = LQ_LEGACY_A;
|
|
else
|
|
rate->type = LQ_LEGACY_G;
|
|
|
|
rate->bw = RATE_MCS_CHAN_WIDTH_20;
|
|
rate->ldpc = false;
|
|
rate_mask = lq_sta->active_legacy_rate;
|
|
} else if (column->mode == RS_SISO) {
|
|
rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO;
|
|
rate_mask = lq_sta->active_siso_rate;
|
|
} else if (column->mode == RS_MIMO2) {
|
|
rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2;
|
|
rate_mask = lq_sta->active_mimo2_rate;
|
|
} else {
|
|
WARN_ONCE(1, "Bad column mode");
|
|
}
|
|
|
|
if (column->mode != RS_LEGACY) {
|
|
rate->bw = rs_bw_from_sta_bw(sta);
|
|
rate->ldpc = lq_sta->ldpc;
|
|
}
|
|
|
|
search_tbl->column = col_id;
|
|
rs_set_expected_tpt_table(lq_sta, search_tbl);
|
|
|
|
lq_sta->visited_columns |= BIT(col_id);
|
|
|
|
/* Get the best matching rate if we're changing modes. e.g.
|
|
* SISO->MIMO, LEGACY->SISO, MIMO->SISO
|
|
*/
|
|
if (curr_column->mode != column->mode) {
|
|
rate_idx = rs_get_best_rate(mvm, lq_sta, search_tbl,
|
|
rate_mask, rate->index);
|
|
|
|
if ((rate_idx == IWL_RATE_INVALID) ||
|
|
!(BIT(rate_idx) & rate_mask)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"can not switch with index %d"
|
|
" rate mask %lx\n",
|
|
rate_idx, rate_mask);
|
|
|
|
goto err;
|
|
}
|
|
|
|
rate->index = rate_idx;
|
|
}
|
|
|
|
IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n",
|
|
col_id, rate->index);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
rate->type = LQ_NONE;
|
|
return -1;
|
|
}
|
|
|
|
static enum rs_action rs_get_rate_action(struct iwl_mvm *mvm,
|
|
struct iwl_scale_tbl_info *tbl,
|
|
s32 sr, int low, int high,
|
|
int current_tpt,
|
|
int low_tpt, int high_tpt)
|
|
{
|
|
enum rs_action action = RS_ACTION_STAY;
|
|
|
|
if ((sr <= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE)) ||
|
|
(current_tpt == 0)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Decrease rate because of low SR\n");
|
|
return RS_ACTION_DOWNSCALE;
|
|
}
|
|
|
|
if ((low_tpt == IWL_INVALID_VALUE) &&
|
|
(high_tpt == IWL_INVALID_VALUE) &&
|
|
(high != IWL_RATE_INVALID)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"No data about high/low rates. Increase rate\n");
|
|
return RS_ACTION_UPSCALE;
|
|
}
|
|
|
|
if ((high_tpt == IWL_INVALID_VALUE) &&
|
|
(high != IWL_RATE_INVALID) &&
|
|
(low_tpt != IWL_INVALID_VALUE) &&
|
|
(low_tpt < current_tpt)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"No data about high rate and low rate is worse. Increase rate\n");
|
|
return RS_ACTION_UPSCALE;
|
|
}
|
|
|
|
if ((high_tpt != IWL_INVALID_VALUE) &&
|
|
(high_tpt > current_tpt)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Higher rate is better. Increate rate\n");
|
|
return RS_ACTION_UPSCALE;
|
|
}
|
|
|
|
if ((low_tpt != IWL_INVALID_VALUE) &&
|
|
(high_tpt != IWL_INVALID_VALUE) &&
|
|
(low_tpt < current_tpt) &&
|
|
(high_tpt < current_tpt)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Both high and low are worse. Maintain rate\n");
|
|
return RS_ACTION_STAY;
|
|
}
|
|
|
|
if ((low_tpt != IWL_INVALID_VALUE) &&
|
|
(low_tpt > current_tpt)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Lower rate is better\n");
|
|
action = RS_ACTION_DOWNSCALE;
|
|
goto out;
|
|
}
|
|
|
|
if ((low_tpt == IWL_INVALID_VALUE) &&
|
|
(low != IWL_RATE_INVALID)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"No data about lower rate\n");
|
|
action = RS_ACTION_DOWNSCALE;
|
|
goto out;
|
|
}
|
|
|
|
IWL_DEBUG_RATE(mvm, "Maintain rate\n");
|
|
|
|
out:
|
|
if ((action == RS_ACTION_DOWNSCALE) && (low != IWL_RATE_INVALID)) {
|
|
if (sr >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"SR is above NO DECREASE. Avoid downscale\n");
|
|
action = RS_ACTION_STAY;
|
|
} else if (current_tpt > (100 * tbl->expected_tpt[low])) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Current TPT is higher than max expected in low rate. Avoid downscale\n");
|
|
action = RS_ACTION_STAY;
|
|
} else {
|
|
IWL_DEBUG_RATE(mvm, "Decrease rate\n");
|
|
}
|
|
}
|
|
|
|
return action;
|
|
}
|
|
|
|
static bool rs_stbc_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta)
|
|
{
|
|
/* Our chip supports Tx STBC and the peer is an HT/VHT STA which
|
|
* supports STBC of at least 1*SS
|
|
*/
|
|
if (!lq_sta->stbc_capable)
|
|
return false;
|
|
|
|
if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static void rs_get_adjacent_txp(struct iwl_mvm *mvm, int index,
|
|
int *weaker, int *stronger)
|
|
{
|
|
*weaker = index + IWL_MVM_RS_TPC_TX_POWER_STEP;
|
|
if (*weaker > TPC_MAX_REDUCTION)
|
|
*weaker = TPC_INVALID;
|
|
|
|
*stronger = index - IWL_MVM_RS_TPC_TX_POWER_STEP;
|
|
if (*stronger < 0)
|
|
*stronger = TPC_INVALID;
|
|
}
|
|
|
|
static bool rs_tpc_allowed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
|
|
struct rs_rate *rate, enum nl80211_band band)
|
|
{
|
|
int index = rate->index;
|
|
bool cam = (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM);
|
|
bool sta_ps_disabled = (vif->type == NL80211_IFTYPE_STATION &&
|
|
!vif->bss_conf.ps);
|
|
|
|
IWL_DEBUG_RATE(mvm, "cam: %d sta_ps_disabled %d\n",
|
|
cam, sta_ps_disabled);
|
|
/*
|
|
* allow tpc only if power management is enabled, or bt coex
|
|
* activity grade allows it and we are on 2.4Ghz.
|
|
*/
|
|
if ((cam || sta_ps_disabled) &&
|
|
!iwl_mvm_bt_coex_is_tpc_allowed(mvm, band))
|
|
return false;
|
|
|
|
IWL_DEBUG_RATE(mvm, "check rate, table type: %d\n", rate->type);
|
|
if (is_legacy(rate))
|
|
return index == IWL_RATE_54M_INDEX;
|
|
if (is_ht(rate))
|
|
return index == IWL_RATE_MCS_7_INDEX;
|
|
if (is_vht(rate))
|
|
return index == IWL_RATE_MCS_7_INDEX ||
|
|
index == IWL_RATE_MCS_8_INDEX ||
|
|
index == IWL_RATE_MCS_9_INDEX;
|
|
|
|
WARN_ON_ONCE(1);
|
|
return false;
|
|
}
|
|
|
|
enum tpc_action {
|
|
TPC_ACTION_STAY,
|
|
TPC_ACTION_DECREASE,
|
|
TPC_ACTION_INCREASE,
|
|
TPC_ACTION_NO_RESTIRCTION,
|
|
};
|
|
|
|
static enum tpc_action rs_get_tpc_action(struct iwl_mvm *mvm,
|
|
s32 sr, int weak, int strong,
|
|
int current_tpt,
|
|
int weak_tpt, int strong_tpt)
|
|
{
|
|
/* stay until we have valid tpt */
|
|
if (current_tpt == IWL_INVALID_VALUE) {
|
|
IWL_DEBUG_RATE(mvm, "no current tpt. stay.\n");
|
|
return TPC_ACTION_STAY;
|
|
}
|
|
|
|
/* Too many failures, increase txp */
|
|
if (sr <= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE) ||
|
|
current_tpt == 0) {
|
|
IWL_DEBUG_RATE(mvm, "increase txp because of weak SR\n");
|
|
return TPC_ACTION_NO_RESTIRCTION;
|
|
}
|
|
|
|
/* try decreasing first if applicable */
|
|
if (sr >= RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&
|
|
weak != TPC_INVALID) {
|
|
if (weak_tpt == IWL_INVALID_VALUE &&
|
|
(strong_tpt == IWL_INVALID_VALUE ||
|
|
current_tpt >= strong_tpt)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"no weak txp measurement. decrease txp\n");
|
|
return TPC_ACTION_DECREASE;
|
|
}
|
|
|
|
if (weak_tpt > current_tpt) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"lower txp has better tpt. decrease txp\n");
|
|
return TPC_ACTION_DECREASE;
|
|
}
|
|
}
|
|
|
|
/* next, increase if needed */
|
|
if (sr < RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&
|
|
strong != TPC_INVALID) {
|
|
if (weak_tpt == IWL_INVALID_VALUE &&
|
|
strong_tpt != IWL_INVALID_VALUE &&
|
|
current_tpt < strong_tpt) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"higher txp has better tpt. increase txp\n");
|
|
return TPC_ACTION_INCREASE;
|
|
}
|
|
|
|
if (weak_tpt < current_tpt &&
|
|
(strong_tpt == IWL_INVALID_VALUE ||
|
|
strong_tpt > current_tpt)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"lower txp has worse tpt. increase txp\n");
|
|
return TPC_ACTION_INCREASE;
|
|
}
|
|
}
|
|
|
|
IWL_DEBUG_RATE(mvm, "no need to increase or decrease txp - stay\n");
|
|
return TPC_ACTION_STAY;
|
|
}
|
|
|
|
static bool rs_tpc_perform(struct iwl_mvm *mvm,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct iwl_scale_tbl_info *tbl)
|
|
{
|
|
struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
|
|
struct ieee80211_vif *vif = mvm_sta->vif;
|
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
enum nl80211_band band;
|
|
struct iwl_rate_scale_data *window;
|
|
struct rs_rate *rate = &tbl->rate;
|
|
enum tpc_action action;
|
|
s32 sr;
|
|
u8 cur = lq_sta->lq.reduced_tpc;
|
|
int current_tpt;
|
|
int weak, strong;
|
|
int weak_tpt = IWL_INVALID_VALUE, strong_tpt = IWL_INVALID_VALUE;
|
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
if (lq_sta->pers.dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) {
|
|
IWL_DEBUG_RATE(mvm, "fixed tpc: %d\n",
|
|
lq_sta->pers.dbg_fixed_txp_reduction);
|
|
lq_sta->lq.reduced_tpc = lq_sta->pers.dbg_fixed_txp_reduction;
|
|
return cur != lq_sta->pers.dbg_fixed_txp_reduction;
|
|
}
|
|
#endif
|
|
|
|
rcu_read_lock();
|
|
chanctx_conf = rcu_dereference(vif->chanctx_conf);
|
|
if (WARN_ON(!chanctx_conf))
|
|
band = NUM_NL80211_BANDS;
|
|
else
|
|
band = chanctx_conf->def.chan->band;
|
|
rcu_read_unlock();
|
|
|
|
if (!rs_tpc_allowed(mvm, vif, rate, band)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"tpc is not allowed. remove txp restrictions\n");
|
|
lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION;
|
|
return cur != TPC_NO_REDUCTION;
|
|
}
|
|
|
|
rs_get_adjacent_txp(mvm, cur, &weak, &strong);
|
|
|
|
/* Collect measured throughputs for current and adjacent rates */
|
|
window = tbl->tpc_win;
|
|
sr = window[cur].success_ratio;
|
|
current_tpt = window[cur].average_tpt;
|
|
if (weak != TPC_INVALID)
|
|
weak_tpt = window[weak].average_tpt;
|
|
if (strong != TPC_INVALID)
|
|
strong_tpt = window[strong].average_tpt;
|
|
|
|
IWL_DEBUG_RATE(mvm,
|
|
"(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n",
|
|
cur, current_tpt, sr, weak, strong,
|
|
weak_tpt, strong_tpt);
|
|
|
|
action = rs_get_tpc_action(mvm, sr, weak, strong,
|
|
current_tpt, weak_tpt, strong_tpt);
|
|
|
|
/* override actions if we are on the edge */
|
|
if (weak == TPC_INVALID && action == TPC_ACTION_DECREASE) {
|
|
IWL_DEBUG_RATE(mvm, "already in lowest txp, stay\n");
|
|
action = TPC_ACTION_STAY;
|
|
} else if (strong == TPC_INVALID &&
|
|
(action == TPC_ACTION_INCREASE ||
|
|
action == TPC_ACTION_NO_RESTIRCTION)) {
|
|
IWL_DEBUG_RATE(mvm, "already in highest txp, stay\n");
|
|
action = TPC_ACTION_STAY;
|
|
}
|
|
|
|
switch (action) {
|
|
case TPC_ACTION_DECREASE:
|
|
lq_sta->lq.reduced_tpc = weak;
|
|
return true;
|
|
case TPC_ACTION_INCREASE:
|
|
lq_sta->lq.reduced_tpc = strong;
|
|
return true;
|
|
case TPC_ACTION_NO_RESTIRCTION:
|
|
lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION;
|
|
return true;
|
|
case TPC_ACTION_STAY:
|
|
/* do nothing */
|
|
break;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Do rate scaling and search for new modulation mode.
|
|
*/
|
|
static void rs_rate_scale_perform(struct iwl_mvm *mvm,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta,
|
|
int tid, bool ndp)
|
|
{
|
|
int low = IWL_RATE_INVALID;
|
|
int high = IWL_RATE_INVALID;
|
|
int index;
|
|
struct iwl_rate_scale_data *window = NULL;
|
|
int current_tpt = IWL_INVALID_VALUE;
|
|
int low_tpt = IWL_INVALID_VALUE;
|
|
int high_tpt = IWL_INVALID_VALUE;
|
|
u32 fail_count;
|
|
enum rs_action scale_action = RS_ACTION_STAY;
|
|
u16 rate_mask;
|
|
u8 update_lq = 0;
|
|
struct iwl_scale_tbl_info *tbl, *tbl1;
|
|
u8 active_tbl = 0;
|
|
u8 done_search = 0;
|
|
u16 high_low;
|
|
s32 sr;
|
|
u8 prev_agg = lq_sta->is_agg;
|
|
struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta);
|
|
struct iwl_mvm_tid_data *tid_data;
|
|
struct rs_rate *rate;
|
|
|
|
lq_sta->is_agg = !!sta_priv->agg_tids;
|
|
|
|
/*
|
|
* Select rate-scale / modulation-mode table to work with in
|
|
* the rest of this function: "search" if searching for better
|
|
* modulation mode, or "active" if doing rate scaling within a mode.
|
|
*/
|
|
if (!lq_sta->search_better_tbl)
|
|
active_tbl = lq_sta->active_tbl;
|
|
else
|
|
active_tbl = 1 - lq_sta->active_tbl;
|
|
|
|
tbl = &(lq_sta->lq_info[active_tbl]);
|
|
rate = &tbl->rate;
|
|
|
|
if (prev_agg != lq_sta->is_agg) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Aggregation changed: prev %d current %d. Update expected TPT table\n",
|
|
prev_agg, lq_sta->is_agg);
|
|
rs_set_expected_tpt_table(lq_sta, tbl);
|
|
rs_rate_scale_clear_tbl_windows(mvm, tbl);
|
|
}
|
|
|
|
/* current tx rate */
|
|
index = rate->index;
|
|
|
|
/* rates available for this association, and for modulation mode */
|
|
rate_mask = rs_get_supported_rates(lq_sta, rate);
|
|
|
|
if (!(BIT(index) & rate_mask)) {
|
|
IWL_ERR(mvm, "Current Rate is not valid\n");
|
|
if (lq_sta->search_better_tbl) {
|
|
/* revert to active table if search table is not valid*/
|
|
rate->type = LQ_NONE;
|
|
lq_sta->search_better_tbl = 0;
|
|
tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Get expected throughput table and history window for current rate */
|
|
if (!tbl->expected_tpt) {
|
|
IWL_ERR(mvm, "tbl->expected_tpt is NULL\n");
|
|
return;
|
|
}
|
|
|
|
/* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
|
|
window = &(tbl->win[index]);
|
|
|
|
/*
|
|
* If there is not enough history to calculate actual average
|
|
* throughput, keep analyzing results of more tx frames, without
|
|
* changing rate or mode (bypass most of the rest of this function).
|
|
* Set up new rate table in uCode only if old rate is not supported
|
|
* in current association (use new rate found above).
|
|
*/
|
|
fail_count = window->counter - window->success_counter;
|
|
if ((fail_count < IWL_MVM_RS_RATE_MIN_FAILURE_TH) &&
|
|
(window->success_counter < IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"%s: Test Window: succ %d total %d\n",
|
|
rs_pretty_rate(rate),
|
|
window->success_counter, window->counter);
|
|
|
|
/* Can't calculate this yet; not enough history */
|
|
window->average_tpt = IWL_INVALID_VALUE;
|
|
|
|
/* Should we stay with this modulation mode,
|
|
* or search for a new one? */
|
|
rs_stay_in_table(lq_sta, false);
|
|
|
|
return;
|
|
}
|
|
|
|
/* If we are searching for better modulation mode, check success. */
|
|
if (lq_sta->search_better_tbl) {
|
|
/* If good success, continue using the "search" mode;
|
|
* no need to send new link quality command, since we're
|
|
* continuing to use the setup that we've been trying. */
|
|
if (window->average_tpt > lq_sta->last_tpt) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"SWITCHING TO NEW TABLE SR: %d "
|
|
"cur-tpt %d old-tpt %d\n",
|
|
window->success_ratio,
|
|
window->average_tpt,
|
|
lq_sta->last_tpt);
|
|
|
|
/* Swap tables; "search" becomes "active" */
|
|
lq_sta->active_tbl = active_tbl;
|
|
current_tpt = window->average_tpt;
|
|
/* Else poor success; go back to mode in "active" table */
|
|
} else {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"GOING BACK TO THE OLD TABLE: SR %d "
|
|
"cur-tpt %d old-tpt %d\n",
|
|
window->success_ratio,
|
|
window->average_tpt,
|
|
lq_sta->last_tpt);
|
|
|
|
/* Nullify "search" table */
|
|
rate->type = LQ_NONE;
|
|
|
|
/* Revert to "active" table */
|
|
active_tbl = lq_sta->active_tbl;
|
|
tbl = &(lq_sta->lq_info[active_tbl]);
|
|
|
|
/* Revert to "active" rate and throughput info */
|
|
index = tbl->rate.index;
|
|
current_tpt = lq_sta->last_tpt;
|
|
|
|
/* Need to set up a new rate table in uCode */
|
|
update_lq = 1;
|
|
}
|
|
|
|
/* Either way, we've made a decision; modulation mode
|
|
* search is done, allow rate adjustment next time. */
|
|
lq_sta->search_better_tbl = 0;
|
|
done_search = 1; /* Don't switch modes below! */
|
|
goto lq_update;
|
|
}
|
|
|
|
/* (Else) not in search of better modulation mode, try for better
|
|
* starting rate, while staying in this mode. */
|
|
high_low = rs_get_adjacent_rate(mvm, index, rate_mask, rate->type);
|
|
low = high_low & 0xff;
|
|
high = (high_low >> 8) & 0xff;
|
|
|
|
/* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
|
|
|
|
sr = window->success_ratio;
|
|
|
|
/* Collect measured throughputs for current and adjacent rates */
|
|
current_tpt = window->average_tpt;
|
|
if (low != IWL_RATE_INVALID)
|
|
low_tpt = tbl->win[low].average_tpt;
|
|
if (high != IWL_RATE_INVALID)
|
|
high_tpt = tbl->win[high].average_tpt;
|
|
|
|
IWL_DEBUG_RATE(mvm,
|
|
"%s: cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n",
|
|
rs_pretty_rate(rate), current_tpt, sr,
|
|
low, high, low_tpt, high_tpt);
|
|
|
|
scale_action = rs_get_rate_action(mvm, tbl, sr, low, high,
|
|
current_tpt, low_tpt, high_tpt);
|
|
|
|
/* Force a search in case BT doesn't like us being in MIMO */
|
|
if (is_mimo(rate) &&
|
|
!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"BT Coex forbids MIMO. Search for new config\n");
|
|
rs_stay_in_table(lq_sta, true);
|
|
goto lq_update;
|
|
}
|
|
|
|
switch (scale_action) {
|
|
case RS_ACTION_DOWNSCALE:
|
|
/* Decrease starting rate, update uCode's rate table */
|
|
if (low != IWL_RATE_INVALID) {
|
|
update_lq = 1;
|
|
index = low;
|
|
} else {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"At the bottom rate. Can't decrease\n");
|
|
}
|
|
|
|
break;
|
|
case RS_ACTION_UPSCALE:
|
|
/* Increase starting rate, update uCode's rate table */
|
|
if (high != IWL_RATE_INVALID) {
|
|
update_lq = 1;
|
|
index = high;
|
|
} else {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"At the top rate. Can't increase\n");
|
|
}
|
|
|
|
break;
|
|
case RS_ACTION_STAY:
|
|
/* No change */
|
|
if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN)
|
|
update_lq = rs_tpc_perform(mvm, sta, lq_sta, tbl);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
lq_update:
|
|
/* Replace uCode's rate table for the destination station. */
|
|
if (update_lq) {
|
|
tbl->rate.index = index;
|
|
if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK)
|
|
rs_tweak_rate_tbl(mvm, sta, lq_sta, tbl, scale_action);
|
|
rs_set_amsdu_len(mvm, sta, tbl, scale_action);
|
|
rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
|
|
}
|
|
|
|
rs_stay_in_table(lq_sta, false);
|
|
|
|
/*
|
|
* Search for new modulation mode if we're:
|
|
* 1) Not changing rates right now
|
|
* 2) Not just finishing up a search
|
|
* 3) Allowing a new search
|
|
*/
|
|
if (!update_lq && !done_search &&
|
|
lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED
|
|
&& window->counter) {
|
|
enum rs_column next_column;
|
|
|
|
/* Save current throughput to compare with "search" throughput*/
|
|
lq_sta->last_tpt = current_tpt;
|
|
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n",
|
|
update_lq, done_search, lq_sta->rs_state,
|
|
window->counter);
|
|
|
|
next_column = rs_get_next_column(mvm, lq_sta, sta, tbl);
|
|
if (next_column != RS_COLUMN_INVALID) {
|
|
int ret = rs_switch_to_column(mvm, lq_sta, sta,
|
|
next_column);
|
|
if (!ret)
|
|
lq_sta->search_better_tbl = 1;
|
|
} else {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n");
|
|
lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_ENDED;
|
|
}
|
|
|
|
/* If new "search" mode was selected, set up in uCode table */
|
|
if (lq_sta->search_better_tbl) {
|
|
/* Access the "search" table, clear its history. */
|
|
tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
|
|
rs_rate_scale_clear_tbl_windows(mvm, tbl);
|
|
|
|
/* Use new "search" start rate */
|
|
index = tbl->rate.index;
|
|
|
|
rs_dump_rate(mvm, &tbl->rate,
|
|
"Switch to SEARCH TABLE:");
|
|
rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
|
|
} else {
|
|
done_search = 1;
|
|
}
|
|
}
|
|
|
|
if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) {
|
|
/* If the "active" (non-search) mode was legacy,
|
|
* and we've tried switching antennas,
|
|
* but we haven't been able to try HT modes (not available),
|
|
* stay with best antenna legacy modulation for a while
|
|
* before next round of mode comparisons. */
|
|
tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
if (is_legacy(&tbl1->rate)) {
|
|
IWL_DEBUG_RATE(mvm, "LQ: STAY in legacy table\n");
|
|
|
|
if (tid != IWL_MAX_TID_COUNT) {
|
|
tid_data = &sta_priv->tid_data[tid];
|
|
if (tid_data->state != IWL_AGG_OFF) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Stop aggregation on tid %d\n",
|
|
tid);
|
|
ieee80211_stop_tx_ba_session(sta, tid);
|
|
}
|
|
}
|
|
rs_set_stay_in_table(mvm, 1, lq_sta);
|
|
} else {
|
|
/* If we're in an HT mode, and all 3 mode switch actions
|
|
* have been tried and compared, stay in this best modulation
|
|
* mode for a while before next round of mode comparisons. */
|
|
if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) &&
|
|
(lq_sta->tx_agg_tid_en & (1 << tid)) &&
|
|
(tid != IWL_MAX_TID_COUNT)) {
|
|
tid_data = &sta_priv->tid_data[tid];
|
|
if (tid_data->state == IWL_AGG_OFF && !ndp) {
|
|
IWL_DEBUG_RATE(mvm,
|
|
"try to aggregate tid %d\n",
|
|
tid);
|
|
rs_tl_turn_on_agg(mvm, tid,
|
|
lq_sta, sta);
|
|
}
|
|
}
|
|
rs_set_stay_in_table(mvm, 0, lq_sta);
|
|
}
|
|
}
|
|
}
|
|
|
|
struct rs_init_rate_info {
|
|
s8 rssi;
|
|
u8 rate_idx;
|
|
};
|
|
|
|
static const struct rs_init_rate_info rs_optimal_rates_24ghz_legacy[] = {
|
|
{ -60, IWL_RATE_54M_INDEX },
|
|
{ -64, IWL_RATE_48M_INDEX },
|
|
{ -68, IWL_RATE_36M_INDEX },
|
|
{ -80, IWL_RATE_24M_INDEX },
|
|
{ -84, IWL_RATE_18M_INDEX },
|
|
{ -85, IWL_RATE_12M_INDEX },
|
|
{ -86, IWL_RATE_11M_INDEX },
|
|
{ -88, IWL_RATE_5M_INDEX },
|
|
{ -90, IWL_RATE_2M_INDEX },
|
|
{ S8_MIN, IWL_RATE_1M_INDEX },
|
|
};
|
|
|
|
static const struct rs_init_rate_info rs_optimal_rates_5ghz_legacy[] = {
|
|
{ -60, IWL_RATE_54M_INDEX },
|
|
{ -64, IWL_RATE_48M_INDEX },
|
|
{ -72, IWL_RATE_36M_INDEX },
|
|
{ -80, IWL_RATE_24M_INDEX },
|
|
{ -84, IWL_RATE_18M_INDEX },
|
|
{ -85, IWL_RATE_12M_INDEX },
|
|
{ -87, IWL_RATE_9M_INDEX },
|
|
{ S8_MIN, IWL_RATE_6M_INDEX },
|
|
};
|
|
|
|
static const struct rs_init_rate_info rs_optimal_rates_ht[] = {
|
|
{ -60, IWL_RATE_MCS_7_INDEX },
|
|
{ -64, IWL_RATE_MCS_6_INDEX },
|
|
{ -68, IWL_RATE_MCS_5_INDEX },
|
|
{ -72, IWL_RATE_MCS_4_INDEX },
|
|
{ -80, IWL_RATE_MCS_3_INDEX },
|
|
{ -84, IWL_RATE_MCS_2_INDEX },
|
|
{ -85, IWL_RATE_MCS_1_INDEX },
|
|
{ S8_MIN, IWL_RATE_MCS_0_INDEX},
|
|
};
|
|
|
|
/* MCS index 9 is not valid for 20MHz VHT channel width,
|
|
* but is ok for 40, 80 and 160MHz channels.
|
|
*/
|
|
static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz[] = {
|
|
{ -60, IWL_RATE_MCS_8_INDEX },
|
|
{ -64, IWL_RATE_MCS_7_INDEX },
|
|
{ -68, IWL_RATE_MCS_6_INDEX },
|
|
{ -72, IWL_RATE_MCS_5_INDEX },
|
|
{ -80, IWL_RATE_MCS_4_INDEX },
|
|
{ -84, IWL_RATE_MCS_3_INDEX },
|
|
{ -85, IWL_RATE_MCS_2_INDEX },
|
|
{ -87, IWL_RATE_MCS_1_INDEX },
|
|
{ S8_MIN, IWL_RATE_MCS_0_INDEX},
|
|
};
|
|
|
|
static const struct rs_init_rate_info rs_optimal_rates_vht[] = {
|
|
{ -60, IWL_RATE_MCS_9_INDEX },
|
|
{ -64, IWL_RATE_MCS_8_INDEX },
|
|
{ -68, IWL_RATE_MCS_7_INDEX },
|
|
{ -72, IWL_RATE_MCS_6_INDEX },
|
|
{ -80, IWL_RATE_MCS_5_INDEX },
|
|
{ -84, IWL_RATE_MCS_4_INDEX },
|
|
{ -85, IWL_RATE_MCS_3_INDEX },
|
|
{ -87, IWL_RATE_MCS_2_INDEX },
|
|
{ -88, IWL_RATE_MCS_1_INDEX },
|
|
{ S8_MIN, IWL_RATE_MCS_0_INDEX },
|
|
};
|
|
|
|
#define IWL_RS_LOW_RSSI_THRESHOLD (-76) /* dBm */
|
|
|
|
/* Init the optimal rate based on STA caps
|
|
* This combined with rssi is used to report the last tx rate
|
|
* to userspace when we haven't transmitted enough frames.
|
|
*/
|
|
static void rs_init_optimal_rate(struct iwl_mvm *mvm,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta)
|
|
{
|
|
struct rs_rate *rate = &lq_sta->optimal_rate;
|
|
|
|
if (lq_sta->max_mimo2_rate_idx != IWL_RATE_INVALID)
|
|
rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2;
|
|
else if (lq_sta->max_siso_rate_idx != IWL_RATE_INVALID)
|
|
rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO;
|
|
else if (lq_sta->band == NL80211_BAND_5GHZ)
|
|
rate->type = LQ_LEGACY_A;
|
|
else
|
|
rate->type = LQ_LEGACY_G;
|
|
|
|
rate->bw = rs_bw_from_sta_bw(sta);
|
|
rate->sgi = rs_sgi_allow(mvm, sta, rate, NULL);
|
|
|
|
/* ANT/LDPC/STBC aren't relevant for the rate reported to userspace */
|
|
|
|
if (is_mimo(rate)) {
|
|
lq_sta->optimal_rate_mask = lq_sta->active_mimo2_rate;
|
|
} else if (is_siso(rate)) {
|
|
lq_sta->optimal_rate_mask = lq_sta->active_siso_rate;
|
|
} else {
|
|
lq_sta->optimal_rate_mask = lq_sta->active_legacy_rate;
|
|
|
|
if (lq_sta->band == NL80211_BAND_5GHZ) {
|
|
lq_sta->optimal_rates = rs_optimal_rates_5ghz_legacy;
|
|
lq_sta->optimal_nentries =
|
|
ARRAY_SIZE(rs_optimal_rates_5ghz_legacy);
|
|
} else {
|
|
lq_sta->optimal_rates = rs_optimal_rates_24ghz_legacy;
|
|
lq_sta->optimal_nentries =
|
|
ARRAY_SIZE(rs_optimal_rates_24ghz_legacy);
|
|
}
|
|
}
|
|
|
|
if (is_vht(rate)) {
|
|
if (rate->bw == RATE_MCS_CHAN_WIDTH_20) {
|
|
lq_sta->optimal_rates = rs_optimal_rates_vht_20mhz;
|
|
lq_sta->optimal_nentries =
|
|
ARRAY_SIZE(rs_optimal_rates_vht_20mhz);
|
|
} else {
|
|
lq_sta->optimal_rates = rs_optimal_rates_vht;
|
|
lq_sta->optimal_nentries =
|
|
ARRAY_SIZE(rs_optimal_rates_vht);
|
|
}
|
|
} else if (is_ht(rate)) {
|
|
lq_sta->optimal_rates = rs_optimal_rates_ht;
|
|
lq_sta->optimal_nentries = ARRAY_SIZE(rs_optimal_rates_ht);
|
|
}
|
|
}
|
|
|
|
/* Compute the optimal rate index based on RSSI */
|
|
static struct rs_rate *rs_get_optimal_rate(struct iwl_mvm *mvm,
|
|
struct iwl_lq_sta *lq_sta)
|
|
{
|
|
struct rs_rate *rate = &lq_sta->optimal_rate;
|
|
int i;
|
|
|
|
rate->index = find_first_bit(&lq_sta->optimal_rate_mask,
|
|
BITS_PER_LONG);
|
|
|
|
for (i = 0; i < lq_sta->optimal_nentries; i++) {
|
|
int rate_idx = lq_sta->optimal_rates[i].rate_idx;
|
|
|
|
if ((lq_sta->pers.last_rssi >= lq_sta->optimal_rates[i].rssi) &&
|
|
(BIT(rate_idx) & lq_sta->optimal_rate_mask)) {
|
|
rate->index = rate_idx;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return rate;
|
|
}
|
|
|
|
/* Choose an initial legacy rate and antenna to use based on the RSSI
|
|
* of last Rx
|
|
*/
|
|
static void rs_get_initial_rate(struct iwl_mvm *mvm,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta,
|
|
enum nl80211_band band,
|
|
struct rs_rate *rate,
|
|
bool init)
|
|
{
|
|
int i, nentries;
|
|
unsigned long active_rate;
|
|
s8 best_rssi = S8_MIN;
|
|
u8 best_ant = ANT_NONE;
|
|
u8 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm);
|
|
const struct rs_init_rate_info *initial_rates;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {
|
|
if (!(lq_sta->pers.chains & BIT(i)))
|
|
continue;
|
|
|
|
if (lq_sta->pers.chain_signal[i] > best_rssi) {
|
|
best_rssi = lq_sta->pers.chain_signal[i];
|
|
best_ant = BIT(i);
|
|
}
|
|
}
|
|
|
|
IWL_DEBUG_RATE(mvm, "Best ANT: %s Best RSSI: %d\n",
|
|
rs_pretty_ant(best_ant), best_rssi);
|
|
|
|
if (best_ant != ANT_A && best_ant != ANT_B)
|
|
rate->ant = first_antenna(valid_tx_ant);
|
|
else
|
|
rate->ant = best_ant;
|
|
|
|
rate->sgi = false;
|
|
rate->ldpc = false;
|
|
rate->bw = RATE_MCS_CHAN_WIDTH_20;
|
|
|
|
rate->index = find_first_bit(&lq_sta->active_legacy_rate,
|
|
BITS_PER_LONG);
|
|
|
|
if (band == NL80211_BAND_5GHZ) {
|
|
rate->type = LQ_LEGACY_A;
|
|
initial_rates = rs_optimal_rates_5ghz_legacy;
|
|
nentries = ARRAY_SIZE(rs_optimal_rates_5ghz_legacy);
|
|
} else {
|
|
rate->type = LQ_LEGACY_G;
|
|
initial_rates = rs_optimal_rates_24ghz_legacy;
|
|
nentries = ARRAY_SIZE(rs_optimal_rates_24ghz_legacy);
|
|
}
|
|
|
|
if (!IWL_MVM_RS_RSSI_BASED_INIT_RATE)
|
|
goto out;
|
|
|
|
/* Start from a higher rate if the corresponding debug capability
|
|
* is enabled. The rate is chosen according to AP capabilities.
|
|
* In case of VHT/HT when the rssi is low fallback to the case of
|
|
* legacy rates.
|
|
*/
|
|
if (sta->vht_cap.vht_supported &&
|
|
best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {
|
|
/*
|
|
* In AP mode, when a new station associates, rs is initialized
|
|
* immediately upon association completion, before the phy
|
|
* context is updated with the association parameters, so the
|
|
* sta bandwidth might be wider than the phy context allows.
|
|
* To avoid this issue, always initialize rs with 20mhz
|
|
* bandwidth rate, and after authorization, when the phy context
|
|
* is already up-to-date, re-init rs with the correct bw.
|
|
*/
|
|
u32 bw = init ? RATE_MCS_CHAN_WIDTH_20 : rs_bw_from_sta_bw(sta);
|
|
|
|
switch (bw) {
|
|
case RATE_MCS_CHAN_WIDTH_40:
|
|
case RATE_MCS_CHAN_WIDTH_80:
|
|
case RATE_MCS_CHAN_WIDTH_160:
|
|
initial_rates = rs_optimal_rates_vht;
|
|
nentries = ARRAY_SIZE(rs_optimal_rates_vht);
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_20:
|
|
initial_rates = rs_optimal_rates_vht_20mhz;
|
|
nentries = ARRAY_SIZE(rs_optimal_rates_vht_20mhz);
|
|
break;
|
|
default:
|
|
IWL_ERR(mvm, "Invalid BW %d\n", sta->bandwidth);
|
|
goto out;
|
|
}
|
|
|
|
active_rate = lq_sta->active_siso_rate;
|
|
rate->type = LQ_VHT_SISO;
|
|
rate->bw = bw;
|
|
} else if (sta->ht_cap.ht_supported &&
|
|
best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {
|
|
initial_rates = rs_optimal_rates_ht;
|
|
nentries = ARRAY_SIZE(rs_optimal_rates_ht);
|
|
active_rate = lq_sta->active_siso_rate;
|
|
rate->type = LQ_HT_SISO;
|
|
} else {
|
|
active_rate = lq_sta->active_legacy_rate;
|
|
}
|
|
|
|
for (i = 0; i < nentries; i++) {
|
|
int rate_idx = initial_rates[i].rate_idx;
|
|
|
|
if ((best_rssi >= initial_rates[i].rssi) &&
|
|
(BIT(rate_idx) & active_rate)) {
|
|
rate->index = rate_idx;
|
|
break;
|
|
}
|
|
}
|
|
|
|
out:
|
|
rs_dump_rate(mvm, rate, "INITIAL");
|
|
}
|
|
|
|
/* Save info about RSSI of last Rx */
|
|
void rs_update_last_rssi(struct iwl_mvm *mvm,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_rx_status *rx_status)
|
|
{
|
|
int i;
|
|
|
|
lq_sta->pers.chains = rx_status->chains;
|
|
lq_sta->pers.chain_signal[0] = rx_status->chain_signal[0];
|
|
lq_sta->pers.chain_signal[1] = rx_status->chain_signal[1];
|
|
lq_sta->pers.chain_signal[2] = rx_status->chain_signal[2];
|
|
lq_sta->pers.last_rssi = S8_MIN;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {
|
|
if (!(lq_sta->pers.chains & BIT(i)))
|
|
continue;
|
|
|
|
if (lq_sta->pers.chain_signal[i] > lq_sta->pers.last_rssi)
|
|
lq_sta->pers.last_rssi = lq_sta->pers.chain_signal[i];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* rs_initialize_lq - Initialize a station's hardware rate table
|
|
*
|
|
* The uCode's station table contains a table of fallback rates
|
|
* for automatic fallback during transmission.
|
|
*
|
|
* NOTE: This sets up a default set of values. These will be replaced later
|
|
* if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
|
|
* rc80211_simple.
|
|
*
|
|
* NOTE: Run REPLY_ADD_STA command to set up station table entry, before
|
|
* calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
|
|
* which requires station table entry to exist).
|
|
*/
|
|
static void rs_initialize_lq(struct iwl_mvm *mvm,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta,
|
|
enum nl80211_band band,
|
|
bool init)
|
|
{
|
|
struct iwl_scale_tbl_info *tbl;
|
|
struct rs_rate *rate;
|
|
u8 active_tbl = 0;
|
|
|
|
if (!sta || !lq_sta)
|
|
return;
|
|
|
|
if (!lq_sta->search_better_tbl)
|
|
active_tbl = lq_sta->active_tbl;
|
|
else
|
|
active_tbl = 1 - lq_sta->active_tbl;
|
|
|
|
tbl = &(lq_sta->lq_info[active_tbl]);
|
|
rate = &tbl->rate;
|
|
|
|
rs_get_initial_rate(mvm, sta, lq_sta, band, rate, init);
|
|
rs_init_optimal_rate(mvm, sta, lq_sta);
|
|
|
|
WARN_ON_ONCE(rate->ant != ANT_A && rate->ant != ANT_B);
|
|
tbl->column = rs_get_column_from_rate(rate);
|
|
|
|
rs_set_expected_tpt_table(lq_sta, tbl);
|
|
rs_fill_lq_cmd(mvm, sta, lq_sta, rate);
|
|
/* TODO restore station should remember the lq cmd */
|
|
iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init);
|
|
}
|
|
|
|
static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
|
|
struct ieee80211_tx_rate_control *txrc)
|
|
{
|
|
struct sk_buff *skb = txrc->skb;
|
|
struct iwl_op_mode *op_mode __maybe_unused =
|
|
(struct iwl_op_mode *)mvm_r;
|
|
struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
struct iwl_lq_sta *lq_sta = mvm_sta;
|
|
struct rs_rate *optimal_rate;
|
|
u32 last_ucode_rate;
|
|
|
|
if (sta && !iwl_mvm_sta_from_mac80211(sta)->vif) {
|
|
/* if vif isn't initialized mvm doesn't know about
|
|
* this station, so don't do anything with the it
|
|
*/
|
|
sta = NULL;
|
|
mvm_sta = NULL;
|
|
}
|
|
|
|
/* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
|
|
|
|
/* Treat uninitialized rate scaling data same as non-existing. */
|
|
if (lq_sta && !lq_sta->pers.drv) {
|
|
IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n");
|
|
mvm_sta = NULL;
|
|
}
|
|
|
|
/* Send management frames and NO_ACK data using lowest rate. */
|
|
if (rate_control_send_low(sta, mvm_sta, txrc))
|
|
return;
|
|
|
|
iwl_mvm_hwrate_to_tx_rate(lq_sta->last_rate_n_flags,
|
|
info->band, &info->control.rates[0]);
|
|
info->control.rates[0].count = 1;
|
|
|
|
/* Report the optimal rate based on rssi and STA caps if we haven't
|
|
* converged yet (too little traffic) or exploring other modulations
|
|
*/
|
|
if (lq_sta->rs_state != RS_STATE_STAY_IN_COLUMN) {
|
|
optimal_rate = rs_get_optimal_rate(mvm, lq_sta);
|
|
last_ucode_rate = ucode_rate_from_rs_rate(mvm,
|
|
optimal_rate);
|
|
iwl_mvm_hwrate_to_tx_rate(last_ucode_rate, info->band,
|
|
&txrc->reported_rate);
|
|
}
|
|
}
|
|
|
|
static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
|
|
gfp_t gfp)
|
|
{
|
|
struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta);
|
|
struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate;
|
|
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
|
|
struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta;
|
|
|
|
IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
|
|
|
|
lq_sta->pers.drv = mvm;
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
lq_sta->pers.dbg_fixed_rate = 0;
|
|
lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID;
|
|
lq_sta->pers.ss_force = RS_SS_FORCE_NONE;
|
|
#endif
|
|
lq_sta->pers.chains = 0;
|
|
memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
|
|
lq_sta->pers.last_rssi = S8_MIN;
|
|
|
|
return &sta_priv->lq_sta;
|
|
}
|
|
|
|
static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap,
|
|
int nss)
|
|
{
|
|
u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &
|
|
(0x3 << (2 * (nss - 1)));
|
|
rx_mcs >>= (2 * (nss - 1));
|
|
|
|
if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_7)
|
|
return IWL_RATE_MCS_7_INDEX;
|
|
else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_8)
|
|
return IWL_RATE_MCS_8_INDEX;
|
|
else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_9)
|
|
return IWL_RATE_MCS_9_INDEX;
|
|
|
|
WARN_ON_ONCE(rx_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED);
|
|
return -1;
|
|
}
|
|
|
|
static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta,
|
|
struct ieee80211_sta_vht_cap *vht_cap,
|
|
struct iwl_lq_sta *lq_sta)
|
|
{
|
|
int i;
|
|
int highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 1);
|
|
|
|
if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {
|
|
for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {
|
|
if (i == IWL_RATE_9M_INDEX)
|
|
continue;
|
|
|
|
/* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */
|
|
if (i == IWL_RATE_MCS_9_INDEX &&
|
|
sta->bandwidth == IEEE80211_STA_RX_BW_20)
|
|
continue;
|
|
|
|
lq_sta->active_siso_rate |= BIT(i);
|
|
}
|
|
}
|
|
|
|
if (sta->rx_nss < 2)
|
|
return;
|
|
|
|
highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2);
|
|
if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {
|
|
for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {
|
|
if (i == IWL_RATE_9M_INDEX)
|
|
continue;
|
|
|
|
/* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */
|
|
if (i == IWL_RATE_MCS_9_INDEX &&
|
|
sta->bandwidth == IEEE80211_STA_RX_BW_20)
|
|
continue;
|
|
|
|
lq_sta->active_mimo2_rate |= BIT(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void rs_ht_init(struct iwl_mvm *mvm,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_sta_ht_cap *ht_cap)
|
|
{
|
|
/* active_siso_rate mask includes 9 MBits (bit 5),
|
|
* and CCK (bits 0-3), supp_rates[] does not;
|
|
* shift to convert format, force 9 MBits off.
|
|
*/
|
|
lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1;
|
|
lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1;
|
|
lq_sta->active_siso_rate &= ~((u16)0x2);
|
|
lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE;
|
|
|
|
lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1;
|
|
lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1;
|
|
lq_sta->active_mimo2_rate &= ~((u16)0x2);
|
|
lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE;
|
|
|
|
if (mvm->cfg->ht_params->ldpc &&
|
|
(ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING))
|
|
lq_sta->ldpc = true;
|
|
|
|
if (mvm->cfg->ht_params->stbc &&
|
|
(num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
|
|
(ht_cap->cap & IEEE80211_HT_CAP_RX_STBC))
|
|
lq_sta->stbc_capable = true;
|
|
|
|
lq_sta->is_vht = false;
|
|
}
|
|
|
|
static void rs_vht_init(struct iwl_mvm *mvm,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_sta_vht_cap *vht_cap)
|
|
{
|
|
rs_vht_set_enabled_rates(sta, vht_cap, lq_sta);
|
|
|
|
if (mvm->cfg->ht_params->ldpc &&
|
|
(vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))
|
|
lq_sta->ldpc = true;
|
|
|
|
if (mvm->cfg->ht_params->stbc &&
|
|
(num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
|
|
(vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK))
|
|
lq_sta->stbc_capable = true;
|
|
|
|
if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
|
|
(num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
|
|
(vht_cap->cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE))
|
|
lq_sta->bfer_capable = true;
|
|
|
|
lq_sta->is_vht = true;
|
|
}
|
|
|
|
#ifdef CONFIG_IWLWIFI_DEBUGFS
|
|
static void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm)
|
|
{
|
|
spin_lock_bh(&mvm->drv_stats_lock);
|
|
memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats));
|
|
spin_unlock_bh(&mvm->drv_stats_lock);
|
|
}
|
|
|
|
void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg)
|
|
{
|
|
u8 nss = 0, mcs = 0;
|
|
|
|
spin_lock(&mvm->drv_stats_lock);
|
|
|
|
if (agg)
|
|
mvm->drv_rx_stats.agg_frames++;
|
|
|
|
mvm->drv_rx_stats.success_frames++;
|
|
|
|
switch (rate & RATE_MCS_CHAN_WIDTH_MSK) {
|
|
case RATE_MCS_CHAN_WIDTH_20:
|
|
mvm->drv_rx_stats.bw_20_frames++;
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_40:
|
|
mvm->drv_rx_stats.bw_40_frames++;
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_80:
|
|
mvm->drv_rx_stats.bw_80_frames++;
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_160:
|
|
mvm->drv_rx_stats.bw_160_frames++;
|
|
break;
|
|
default:
|
|
WARN_ONCE(1, "bad BW. rate 0x%x", rate);
|
|
}
|
|
|
|
if (rate & RATE_MCS_HT_MSK) {
|
|
mvm->drv_rx_stats.ht_frames++;
|
|
mcs = rate & RATE_HT_MCS_RATE_CODE_MSK;
|
|
nss = ((rate & RATE_HT_MCS_NSS_MSK) >> RATE_HT_MCS_NSS_POS) + 1;
|
|
} else if (rate & RATE_MCS_VHT_MSK) {
|
|
mvm->drv_rx_stats.vht_frames++;
|
|
mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK;
|
|
nss = ((rate & RATE_VHT_MCS_NSS_MSK) >>
|
|
RATE_VHT_MCS_NSS_POS) + 1;
|
|
} else {
|
|
mvm->drv_rx_stats.legacy_frames++;
|
|
}
|
|
|
|
if (nss == 1)
|
|
mvm->drv_rx_stats.siso_frames++;
|
|
else if (nss == 2)
|
|
mvm->drv_rx_stats.mimo2_frames++;
|
|
|
|
if (rate & RATE_MCS_SGI_MSK)
|
|
mvm->drv_rx_stats.sgi_frames++;
|
|
else
|
|
mvm->drv_rx_stats.ngi_frames++;
|
|
|
|
mvm->drv_rx_stats.last_rates[mvm->drv_rx_stats.last_frame_idx] = rate;
|
|
mvm->drv_rx_stats.last_frame_idx =
|
|
(mvm->drv_rx_stats.last_frame_idx + 1) %
|
|
ARRAY_SIZE(mvm->drv_rx_stats.last_rates);
|
|
|
|
spin_unlock(&mvm->drv_stats_lock);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Called after adding a new station to initialize rate scaling
|
|
*/
|
|
void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
|
|
enum nl80211_band band, bool init)
|
|
{
|
|
int i, j;
|
|
struct ieee80211_hw *hw = mvm->hw;
|
|
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
|
|
struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
|
|
struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta);
|
|
struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta;
|
|
struct ieee80211_supported_band *sband;
|
|
unsigned long supp; /* must be unsigned long for for_each_set_bit */
|
|
|
|
/* clear all non-persistent lq data */
|
|
memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));
|
|
|
|
sband = hw->wiphy->bands[band];
|
|
|
|
lq_sta->lq.sta_id = sta_priv->sta_id;
|
|
sta_priv->tlc_amsdu = false;
|
|
|
|
for (j = 0; j < LQ_SIZE; j++)
|
|
rs_rate_scale_clear_tbl_windows(mvm, &lq_sta->lq_info[j]);
|
|
|
|
lq_sta->flush_timer = 0;
|
|
lq_sta->last_tx = jiffies;
|
|
|
|
IWL_DEBUG_RATE(mvm,
|
|
"LQ: *** rate scale station global init for station %d ***\n",
|
|
sta_priv->sta_id);
|
|
/* TODO: what is a good starting rate for STA? About middle? Maybe not
|
|
* the lowest or the highest rate.. Could consider using RSSI from
|
|
* previous packets? Need to have IEEE 802.1X auth succeed immediately
|
|
* after assoc.. */
|
|
|
|
lq_sta->missed_rate_counter = IWL_MVM_RS_MISSED_RATE_MAX;
|
|
lq_sta->band = sband->band;
|
|
/*
|
|
* active legacy rates as per supported rates bitmap
|
|
*/
|
|
supp = sta->supp_rates[sband->band];
|
|
lq_sta->active_legacy_rate = 0;
|
|
for_each_set_bit(i, &supp, BITS_PER_LONG)
|
|
lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value);
|
|
|
|
/* TODO: should probably account for rx_highest for both HT/VHT */
|
|
if (!vht_cap || !vht_cap->vht_supported)
|
|
rs_ht_init(mvm, sta, lq_sta, ht_cap);
|
|
else
|
|
rs_vht_init(mvm, sta, lq_sta, vht_cap);
|
|
|
|
lq_sta->max_legacy_rate_idx =
|
|
rs_get_max_rate_from_mask(lq_sta->active_legacy_rate);
|
|
lq_sta->max_siso_rate_idx =
|
|
rs_get_max_rate_from_mask(lq_sta->active_siso_rate);
|
|
lq_sta->max_mimo2_rate_idx =
|
|
rs_get_max_rate_from_mask(lq_sta->active_mimo2_rate);
|
|
|
|
IWL_DEBUG_RATE(mvm,
|
|
"LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d BFER=%d\n",
|
|
lq_sta->active_legacy_rate,
|
|
lq_sta->active_siso_rate,
|
|
lq_sta->active_mimo2_rate,
|
|
lq_sta->is_vht, lq_sta->ldpc, lq_sta->stbc_capable,
|
|
lq_sta->bfer_capable);
|
|
IWL_DEBUG_RATE(mvm, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n",
|
|
lq_sta->max_legacy_rate_idx,
|
|
lq_sta->max_siso_rate_idx,
|
|
lq_sta->max_mimo2_rate_idx);
|
|
|
|
/* These values will be overridden later */
|
|
lq_sta->lq.single_stream_ant_msk =
|
|
first_antenna(iwl_mvm_get_valid_tx_ant(mvm));
|
|
lq_sta->lq.dual_stream_ant_msk = ANT_AB;
|
|
|
|
/* as default allow aggregation for all tids */
|
|
lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;
|
|
lq_sta->is_agg = 0;
|
|
#ifdef CONFIG_IWLWIFI_DEBUGFS
|
|
iwl_mvm_reset_frame_stats(mvm);
|
|
#endif
|
|
rs_initialize_lq(mvm, sta, lq_sta, band, init);
|
|
}
|
|
|
|
static void rs_rate_update(void *mvm_r,
|
|
struct ieee80211_supported_band *sband,
|
|
struct cfg80211_chan_def *chandef,
|
|
struct ieee80211_sta *sta, void *priv_sta,
|
|
u32 changed)
|
|
{
|
|
u8 tid;
|
|
struct iwl_op_mode *op_mode =
|
|
(struct iwl_op_mode *)mvm_r;
|
|
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
|
|
|
|
if (!iwl_mvm_sta_from_mac80211(sta)->vif)
|
|
return;
|
|
|
|
/* Stop any ongoing aggregations as rs starts off assuming no agg */
|
|
for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
|
|
ieee80211_stop_tx_ba_session(sta, tid);
|
|
|
|
iwl_mvm_rs_rate_init(mvm, sta, sband->band, false);
|
|
}
|
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
static void rs_build_rates_table_from_fixed(struct iwl_mvm *mvm,
|
|
struct iwl_lq_cmd *lq_cmd,
|
|
enum nl80211_band band,
|
|
u32 ucode_rate)
|
|
{
|
|
struct rs_rate rate;
|
|
int i;
|
|
int num_rates = ARRAY_SIZE(lq_cmd->rs_table);
|
|
__le32 ucode_rate_le32 = cpu_to_le32(ucode_rate);
|
|
u8 ant = (ucode_rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS;
|
|
|
|
for (i = 0; i < num_rates; i++)
|
|
lq_cmd->rs_table[i] = ucode_rate_le32;
|
|
|
|
if (rs_rate_from_ucode_rate(ucode_rate, band, &rate)) {
|
|
WARN_ON_ONCE(1);
|
|
return;
|
|
}
|
|
|
|
if (is_mimo(&rate))
|
|
lq_cmd->mimo_delim = num_rates - 1;
|
|
else
|
|
lq_cmd->mimo_delim = 0;
|
|
|
|
lq_cmd->reduced_tpc = 0;
|
|
|
|
if (num_of_ant(ant) == 1)
|
|
lq_cmd->single_stream_ant_msk = ant;
|
|
|
|
lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
|
|
}
|
|
#endif /* CONFIG_MAC80211_DEBUGFS */
|
|
|
|
static void rs_fill_rates_for_column(struct iwl_mvm *mvm,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct rs_rate *rate,
|
|
__le32 *rs_table, int *rs_table_index,
|
|
int num_rates, int num_retries,
|
|
u8 valid_tx_ant, bool toggle_ant)
|
|
{
|
|
int i, j;
|
|
__le32 ucode_rate;
|
|
bool bottom_reached = false;
|
|
int prev_rate_idx = rate->index;
|
|
int end = LINK_QUAL_MAX_RETRY_NUM;
|
|
int index = *rs_table_index;
|
|
|
|
for (i = 0; i < num_rates && index < end; i++) {
|
|
for (j = 0; j < num_retries && index < end; j++, index++) {
|
|
ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm,
|
|
rate));
|
|
rs_table[index] = ucode_rate;
|
|
if (toggle_ant)
|
|
rs_toggle_antenna(valid_tx_ant, rate);
|
|
}
|
|
|
|
prev_rate_idx = rate->index;
|
|
bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate);
|
|
if (bottom_reached && !is_legacy(rate))
|
|
break;
|
|
}
|
|
|
|
if (!bottom_reached && !is_legacy(rate))
|
|
rate->index = prev_rate_idx;
|
|
|
|
*rs_table_index = index;
|
|
}
|
|
|
|
/* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI
|
|
* column the rate table should look like this:
|
|
*
|
|
* rate[0] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI
|
|
* rate[1] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI
|
|
* rate[2] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI
|
|
* rate[3] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI
|
|
* rate[4] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI
|
|
* rate[5] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI
|
|
* rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI
|
|
* rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI
|
|
* rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI
|
|
* rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps
|
|
* rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps
|
|
* rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps
|
|
* rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps
|
|
* rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps
|
|
* rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps
|
|
* rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps
|
|
*/
|
|
static void rs_build_rates_table(struct iwl_mvm *mvm,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta,
|
|
const struct rs_rate *initial_rate)
|
|
{
|
|
struct rs_rate rate;
|
|
int num_rates, num_retries, index = 0;
|
|
u8 valid_tx_ant = 0;
|
|
struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
|
|
bool toggle_ant = false;
|
|
|
|
memcpy(&rate, initial_rate, sizeof(rate));
|
|
|
|
valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm);
|
|
|
|
/* TODO: remove old API when min FW API hits 14 */
|
|
if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS) &&
|
|
rs_stbc_allow(mvm, sta, lq_sta))
|
|
rate.stbc = true;
|
|
|
|
if (is_siso(&rate)) {
|
|
num_rates = IWL_MVM_RS_INITIAL_SISO_NUM_RATES;
|
|
num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE;
|
|
} else if (is_mimo(&rate)) {
|
|
num_rates = IWL_MVM_RS_INITIAL_MIMO_NUM_RATES;
|
|
num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE;
|
|
} else {
|
|
num_rates = IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES;
|
|
num_retries = IWL_MVM_RS_INITIAL_LEGACY_RETRIES;
|
|
toggle_ant = true;
|
|
}
|
|
|
|
rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
|
|
num_rates, num_retries, valid_tx_ant,
|
|
toggle_ant);
|
|
|
|
rs_get_lower_rate_down_column(lq_sta, &rate);
|
|
|
|
if (is_siso(&rate)) {
|
|
num_rates = IWL_MVM_RS_SECONDARY_SISO_NUM_RATES;
|
|
num_retries = IWL_MVM_RS_SECONDARY_SISO_RETRIES;
|
|
lq_cmd->mimo_delim = index;
|
|
} else if (is_legacy(&rate)) {
|
|
num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES;
|
|
num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES;
|
|
} else {
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
|
|
toggle_ant = true;
|
|
|
|
rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
|
|
num_rates, num_retries, valid_tx_ant,
|
|
toggle_ant);
|
|
|
|
rs_get_lower_rate_down_column(lq_sta, &rate);
|
|
|
|
num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES;
|
|
num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES;
|
|
|
|
rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
|
|
num_rates, num_retries, valid_tx_ant,
|
|
toggle_ant);
|
|
|
|
}
|
|
|
|
struct rs_bfer_active_iter_data {
|
|
struct ieee80211_sta *exclude_sta;
|
|
struct iwl_mvm_sta *bfer_mvmsta;
|
|
};
|
|
|
|
static void rs_bfer_active_iter(void *_data,
|
|
struct ieee80211_sta *sta)
|
|
{
|
|
struct rs_bfer_active_iter_data *data = _data;
|
|
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
|
|
struct iwl_lq_cmd *lq_cmd = &mvmsta->lq_sta.lq;
|
|
u32 ss_params = le32_to_cpu(lq_cmd->ss_params);
|
|
|
|
if (sta == data->exclude_sta)
|
|
return;
|
|
|
|
/* The current sta has BFER allowed */
|
|
if (ss_params & LQ_SS_BFER_ALLOWED) {
|
|
WARN_ON_ONCE(data->bfer_mvmsta != NULL);
|
|
|
|
data->bfer_mvmsta = mvmsta;
|
|
}
|
|
}
|
|
|
|
static int rs_bfer_priority(struct iwl_mvm_sta *sta)
|
|
{
|
|
int prio = -1;
|
|
enum nl80211_iftype viftype = ieee80211_vif_type_p2p(sta->vif);
|
|
|
|
switch (viftype) {
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_P2P_GO:
|
|
prio = 3;
|
|
break;
|
|
case NL80211_IFTYPE_P2P_CLIENT:
|
|
prio = 2;
|
|
break;
|
|
case NL80211_IFTYPE_STATION:
|
|
prio = 1;
|
|
break;
|
|
default:
|
|
WARN_ONCE(true, "viftype %d sta_id %d", viftype, sta->sta_id);
|
|
prio = -1;
|
|
}
|
|
|
|
return prio;
|
|
}
|
|
|
|
/* Returns >0 if sta1 has a higher BFER priority compared to sta2 */
|
|
static int rs_bfer_priority_cmp(struct iwl_mvm_sta *sta1,
|
|
struct iwl_mvm_sta *sta2)
|
|
{
|
|
int prio1 = rs_bfer_priority(sta1);
|
|
int prio2 = rs_bfer_priority(sta2);
|
|
|
|
if (prio1 > prio2)
|
|
return 1;
|
|
if (prio1 < prio2)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
static void rs_set_lq_ss_params(struct iwl_mvm *mvm,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta,
|
|
const struct rs_rate *initial_rate)
|
|
{
|
|
struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
|
|
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
|
|
struct rs_bfer_active_iter_data data = {
|
|
.exclude_sta = sta,
|
|
.bfer_mvmsta = NULL,
|
|
};
|
|
struct iwl_mvm_sta *bfer_mvmsta = NULL;
|
|
u32 ss_params = LQ_SS_PARAMS_VALID;
|
|
|
|
if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
|
|
goto out;
|
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
/* Check if forcing the decision is configured.
|
|
* Note that SISO is forced by not allowing STBC or BFER
|
|
*/
|
|
if (lq_sta->pers.ss_force == RS_SS_FORCE_STBC)
|
|
ss_params |= (LQ_SS_STBC_1SS_ALLOWED | LQ_SS_FORCE);
|
|
else if (lq_sta->pers.ss_force == RS_SS_FORCE_BFER)
|
|
ss_params |= (LQ_SS_BFER_ALLOWED | LQ_SS_FORCE);
|
|
|
|
if (lq_sta->pers.ss_force != RS_SS_FORCE_NONE) {
|
|
IWL_DEBUG_RATE(mvm, "Forcing single stream Tx decision %d\n",
|
|
lq_sta->pers.ss_force);
|
|
goto out;
|
|
}
|
|
#endif
|
|
|
|
if (lq_sta->stbc_capable)
|
|
ss_params |= LQ_SS_STBC_1SS_ALLOWED;
|
|
|
|
if (!lq_sta->bfer_capable)
|
|
goto out;
|
|
|
|
ieee80211_iterate_stations_atomic(mvm->hw,
|
|
rs_bfer_active_iter,
|
|
&data);
|
|
bfer_mvmsta = data.bfer_mvmsta;
|
|
|
|
/* This code is safe as it doesn't run concurrently for different
|
|
* stations. This is guaranteed by the fact that calls to
|
|
* ieee80211_tx_status wouldn't run concurrently for a single HW.
|
|
*/
|
|
if (!bfer_mvmsta) {
|
|
IWL_DEBUG_RATE(mvm, "No sta with BFER allowed found. Allow\n");
|
|
|
|
ss_params |= LQ_SS_BFER_ALLOWED;
|
|
goto out;
|
|
}
|
|
|
|
IWL_DEBUG_RATE(mvm, "Found existing sta %d with BFER activated\n",
|
|
bfer_mvmsta->sta_id);
|
|
|
|
/* Disallow BFER on another STA if active and we're a higher priority */
|
|
if (rs_bfer_priority_cmp(mvmsta, bfer_mvmsta) > 0) {
|
|
struct iwl_lq_cmd *bfersta_lq_cmd = &bfer_mvmsta->lq_sta.lq;
|
|
u32 bfersta_ss_params = le32_to_cpu(bfersta_lq_cmd->ss_params);
|
|
|
|
bfersta_ss_params &= ~LQ_SS_BFER_ALLOWED;
|
|
bfersta_lq_cmd->ss_params = cpu_to_le32(bfersta_ss_params);
|
|
iwl_mvm_send_lq_cmd(mvm, bfersta_lq_cmd, false);
|
|
|
|
ss_params |= LQ_SS_BFER_ALLOWED;
|
|
IWL_DEBUG_RATE(mvm,
|
|
"Lower priority BFER sta found (%d). Switch BFER\n",
|
|
bfer_mvmsta->sta_id);
|
|
}
|
|
out:
|
|
lq_cmd->ss_params = cpu_to_le32(ss_params);
|
|
}
|
|
|
|
static void rs_fill_lq_cmd(struct iwl_mvm *mvm,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta,
|
|
const struct rs_rate *initial_rate)
|
|
{
|
|
struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
|
|
struct iwl_mvm_sta *mvmsta;
|
|
struct iwl_mvm_vif *mvmvif;
|
|
|
|
lq_cmd->agg_disable_start_th = IWL_MVM_RS_AGG_DISABLE_START;
|
|
lq_cmd->agg_time_limit =
|
|
cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT);
|
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
if (lq_sta->pers.dbg_fixed_rate) {
|
|
rs_build_rates_table_from_fixed(mvm, lq_cmd,
|
|
lq_sta->band,
|
|
lq_sta->pers.dbg_fixed_rate);
|
|
return;
|
|
}
|
|
#endif
|
|
if (WARN_ON_ONCE(!sta || !initial_rate))
|
|
return;
|
|
|
|
rs_build_rates_table(mvm, sta, lq_sta, initial_rate);
|
|
|
|
if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS))
|
|
rs_set_lq_ss_params(mvm, sta, lq_sta, initial_rate);
|
|
|
|
mvmsta = iwl_mvm_sta_from_mac80211(sta);
|
|
mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
|
|
|
|
if (num_of_ant(initial_rate->ant) == 1)
|
|
lq_cmd->single_stream_ant_msk = initial_rate->ant;
|
|
|
|
lq_cmd->agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
|
|
|
|
/*
|
|
* In case of low latency, tell the firmware to leave a frame in the
|
|
* Tx Fifo so that it can start a transaction in the same TxOP. This
|
|
* basically allows the firmware to send bursts.
|
|
*/
|
|
if (iwl_mvm_vif_low_latency(mvmvif))
|
|
lq_cmd->agg_frame_cnt_limit--;
|
|
|
|
if (mvmsta->vif->p2p)
|
|
lq_cmd->flags |= LQ_FLAG_USE_RTS_MSK;
|
|
|
|
lq_cmd->agg_time_limit =
|
|
cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm, sta));
|
|
}
|
|
|
|
static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
|
|
{
|
|
return hw->priv;
|
|
}
|
|
/* rate scale requires free function to be implemented */
|
|
static void rs_free(void *mvm_rate)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta,
|
|
void *mvm_sta)
|
|
{
|
|
struct iwl_op_mode *op_mode __maybe_unused = mvm_r;
|
|
struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
|
|
|
|
IWL_DEBUG_RATE(mvm, "enter\n");
|
|
IWL_DEBUG_RATE(mvm, "leave\n");
|
|
}
|
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
int rs_pretty_print_rate(char *buf, const u32 rate)
|
|
{
|
|
|
|
char *type, *bw;
|
|
u8 mcs = 0, nss = 0;
|
|
u8 ant = (rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS;
|
|
|
|
if (!(rate & RATE_MCS_HT_MSK) &&
|
|
!(rate & RATE_MCS_VHT_MSK)) {
|
|
int index = iwl_hwrate_to_plcp_idx(rate);
|
|
|
|
return sprintf(buf, "Legacy | ANT: %s Rate: %s Mbps\n",
|
|
rs_pretty_ant(ant),
|
|
index == IWL_RATE_INVALID ? "BAD" :
|
|
iwl_rate_mcs[index].mbps);
|
|
}
|
|
|
|
if (rate & RATE_MCS_VHT_MSK) {
|
|
type = "VHT";
|
|
mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK;
|
|
nss = ((rate & RATE_VHT_MCS_NSS_MSK)
|
|
>> RATE_VHT_MCS_NSS_POS) + 1;
|
|
} else if (rate & RATE_MCS_HT_MSK) {
|
|
type = "HT";
|
|
mcs = rate & RATE_HT_MCS_INDEX_MSK;
|
|
} else {
|
|
type = "Unknown"; /* shouldn't happen */
|
|
}
|
|
|
|
switch (rate & RATE_MCS_CHAN_WIDTH_MSK) {
|
|
case RATE_MCS_CHAN_WIDTH_20:
|
|
bw = "20Mhz";
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_40:
|
|
bw = "40Mhz";
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_80:
|
|
bw = "80Mhz";
|
|
break;
|
|
case RATE_MCS_CHAN_WIDTH_160:
|
|
bw = "160Mhz";
|
|
break;
|
|
default:
|
|
bw = "BAD BW";
|
|
}
|
|
|
|
return sprintf(buf, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s\n",
|
|
type, rs_pretty_ant(ant), bw, mcs, nss,
|
|
(rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ",
|
|
(rate & RATE_MCS_HT_STBC_MSK) ? "STBC " : "",
|
|
(rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "",
|
|
(rate & RATE_MCS_BF_MSK) ? "BF " : "",
|
|
(rate & RATE_MCS_ZLF_MSK) ? "ZLF " : "");
|
|
}
|
|
|
|
/**
|
|
* Program the device to use fixed rate for frame transmit
|
|
* This is for debugging/testing only
|
|
* once the device start use fixed rate, we need to reload the module
|
|
* to being back the normal operation.
|
|
*/
|
|
static void rs_program_fix_rate(struct iwl_mvm *mvm,
|
|
struct iwl_lq_sta *lq_sta)
|
|
{
|
|
lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */
|
|
lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
|
|
lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
|
|
|
|
IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n",
|
|
lq_sta->lq.sta_id, lq_sta->pers.dbg_fixed_rate);
|
|
|
|
if (lq_sta->pers.dbg_fixed_rate) {
|
|
rs_fill_lq_cmd(mvm, NULL, lq_sta, NULL);
|
|
iwl_mvm_send_lq_cmd(lq_sta->pers.drv, &lq_sta->lq, false);
|
|
}
|
|
}
|
|
|
|
static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file,
|
|
const char __user *user_buf, size_t count, loff_t *ppos)
|
|
{
|
|
struct iwl_lq_sta *lq_sta = file->private_data;
|
|
struct iwl_mvm *mvm;
|
|
char buf[64];
|
|
size_t buf_size;
|
|
u32 parsed_rate;
|
|
|
|
mvm = lq_sta->pers.drv;
|
|
memset(buf, 0, sizeof(buf));
|
|
buf_size = min(count, sizeof(buf) - 1);
|
|
if (copy_from_user(buf, user_buf, buf_size))
|
|
return -EFAULT;
|
|
|
|
if (sscanf(buf, "%x", &parsed_rate) == 1)
|
|
lq_sta->pers.dbg_fixed_rate = parsed_rate;
|
|
else
|
|
lq_sta->pers.dbg_fixed_rate = 0;
|
|
|
|
rs_program_fix_rate(mvm, lq_sta);
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
|
|
char __user *user_buf, size_t count, loff_t *ppos)
|
|
{
|
|
char *buff;
|
|
int desc = 0;
|
|
int i = 0;
|
|
ssize_t ret;
|
|
|
|
struct iwl_lq_sta *lq_sta = file->private_data;
|
|
struct iwl_mvm_sta *mvmsta =
|
|
container_of(lq_sta, struct iwl_mvm_sta, lq_sta);
|
|
struct iwl_mvm *mvm;
|
|
struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
struct rs_rate *rate = &tbl->rate;
|
|
u32 ss_params;
|
|
|
|
mvm = lq_sta->pers.drv;
|
|
buff = kmalloc(2048, GFP_KERNEL);
|
|
if (!buff)
|
|
return -ENOMEM;
|
|
|
|
desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id);
|
|
desc += sprintf(buff+desc, "failed=%d success=%d rate=0%lX\n",
|
|
lq_sta->total_failed, lq_sta->total_success,
|
|
lq_sta->active_legacy_rate);
|
|
desc += sprintf(buff+desc, "fixed rate 0x%X\n",
|
|
lq_sta->pers.dbg_fixed_rate);
|
|
desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n",
|
|
(iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "",
|
|
(iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "",
|
|
(iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : "");
|
|
desc += sprintf(buff+desc, "lq type %s\n",
|
|
(is_legacy(rate)) ? "legacy" :
|
|
is_vht(rate) ? "VHT" : "HT");
|
|
if (!is_legacy(rate)) {
|
|
desc += sprintf(buff + desc, " %s",
|
|
(is_siso(rate)) ? "SISO" : "MIMO2");
|
|
desc += sprintf(buff + desc, " %s",
|
|
(is_ht20(rate)) ? "20MHz" :
|
|
(is_ht40(rate)) ? "40MHz" :
|
|
(is_ht80(rate)) ? "80MHz" :
|
|
(is_ht160(rate)) ? "160MHz" : "BAD BW");
|
|
desc += sprintf(buff + desc, " %s %s %s %s\n",
|
|
(rate->sgi) ? "SGI" : "NGI",
|
|
(rate->ldpc) ? "LDPC" : "BCC",
|
|
(lq_sta->is_agg) ? "AGG on" : "",
|
|
(mvmsta->tlc_amsdu) ? "AMSDU on" : "");
|
|
}
|
|
desc += sprintf(buff+desc, "last tx rate=0x%X\n",
|
|
lq_sta->last_rate_n_flags);
|
|
desc += sprintf(buff+desc,
|
|
"general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n",
|
|
lq_sta->lq.flags,
|
|
lq_sta->lq.mimo_delim,
|
|
lq_sta->lq.single_stream_ant_msk,
|
|
lq_sta->lq.dual_stream_ant_msk);
|
|
|
|
desc += sprintf(buff+desc,
|
|
"agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
|
|
le16_to_cpu(lq_sta->lq.agg_time_limit),
|
|
lq_sta->lq.agg_disable_start_th,
|
|
lq_sta->lq.agg_frame_cnt_limit);
|
|
|
|
desc += sprintf(buff+desc, "reduced tpc=%d\n", lq_sta->lq.reduced_tpc);
|
|
ss_params = le32_to_cpu(lq_sta->lq.ss_params);
|
|
desc += sprintf(buff+desc, "single stream params: %s%s%s%s\n",
|
|
(ss_params & LQ_SS_PARAMS_VALID) ?
|
|
"VALID" : "INVALID",
|
|
(ss_params & LQ_SS_BFER_ALLOWED) ?
|
|
", BFER" : "",
|
|
(ss_params & LQ_SS_STBC_1SS_ALLOWED) ?
|
|
", STBC" : "",
|
|
(ss_params & LQ_SS_FORCE) ?
|
|
", FORCE" : "");
|
|
desc += sprintf(buff+desc,
|
|
"Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
|
|
lq_sta->lq.initial_rate_index[0],
|
|
lq_sta->lq.initial_rate_index[1],
|
|
lq_sta->lq.initial_rate_index[2],
|
|
lq_sta->lq.initial_rate_index[3]);
|
|
|
|
for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
|
|
u32 r = le32_to_cpu(lq_sta->lq.rs_table[i]);
|
|
|
|
desc += sprintf(buff+desc, " rate[%d] 0x%X ", i, r);
|
|
desc += rs_pretty_print_rate(buff+desc, r);
|
|
}
|
|
|
|
ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
|
|
kfree(buff);
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations rs_sta_dbgfs_scale_table_ops = {
|
|
.write = rs_sta_dbgfs_scale_table_write,
|
|
.read = rs_sta_dbgfs_scale_table_read,
|
|
.open = simple_open,
|
|
.llseek = default_llseek,
|
|
};
|
|
static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,
|
|
char __user *user_buf, size_t count, loff_t *ppos)
|
|
{
|
|
char *buff;
|
|
int desc = 0;
|
|
int i, j;
|
|
ssize_t ret;
|
|
struct iwl_scale_tbl_info *tbl;
|
|
struct rs_rate *rate;
|
|
struct iwl_lq_sta *lq_sta = file->private_data;
|
|
|
|
buff = kmalloc(1024, GFP_KERNEL);
|
|
if (!buff)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < LQ_SIZE; i++) {
|
|
tbl = &(lq_sta->lq_info[i]);
|
|
rate = &tbl->rate;
|
|
desc += sprintf(buff+desc,
|
|
"%s type=%d SGI=%d BW=%s DUP=0\n"
|
|
"index=%d\n",
|
|
lq_sta->active_tbl == i ? "*" : "x",
|
|
rate->type,
|
|
rate->sgi,
|
|
is_ht20(rate) ? "20MHz" :
|
|
is_ht40(rate) ? "40MHz" :
|
|
is_ht80(rate) ? "80MHz" :
|
|
is_ht160(rate) ? "160MHz" : "ERR",
|
|
rate->index);
|
|
for (j = 0; j < IWL_RATE_COUNT; j++) {
|
|
desc += sprintf(buff+desc,
|
|
"counter=%d success=%d %%=%d\n",
|
|
tbl->win[j].counter,
|
|
tbl->win[j].success_counter,
|
|
tbl->win[j].success_ratio);
|
|
}
|
|
}
|
|
ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
|
|
kfree(buff);
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
|
|
.read = rs_sta_dbgfs_stats_table_read,
|
|
.open = simple_open,
|
|
.llseek = default_llseek,
|
|
};
|
|
|
|
static ssize_t rs_sta_dbgfs_drv_tx_stats_read(struct file *file,
|
|
char __user *user_buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
static const char * const column_name[] = {
|
|
[RS_COLUMN_LEGACY_ANT_A] = "LEGACY_ANT_A",
|
|
[RS_COLUMN_LEGACY_ANT_B] = "LEGACY_ANT_B",
|
|
[RS_COLUMN_SISO_ANT_A] = "SISO_ANT_A",
|
|
[RS_COLUMN_SISO_ANT_B] = "SISO_ANT_B",
|
|
[RS_COLUMN_SISO_ANT_A_SGI] = "SISO_ANT_A_SGI",
|
|
[RS_COLUMN_SISO_ANT_B_SGI] = "SISO_ANT_B_SGI",
|
|
[RS_COLUMN_MIMO2] = "MIMO2",
|
|
[RS_COLUMN_MIMO2_SGI] = "MIMO2_SGI",
|
|
};
|
|
|
|
static const char * const rate_name[] = {
|
|
[IWL_RATE_1M_INDEX] = "1M",
|
|
[IWL_RATE_2M_INDEX] = "2M",
|
|
[IWL_RATE_5M_INDEX] = "5.5M",
|
|
[IWL_RATE_11M_INDEX] = "11M",
|
|
[IWL_RATE_6M_INDEX] = "6M|MCS0",
|
|
[IWL_RATE_9M_INDEX] = "9M",
|
|
[IWL_RATE_12M_INDEX] = "12M|MCS1",
|
|
[IWL_RATE_18M_INDEX] = "18M|MCS2",
|
|
[IWL_RATE_24M_INDEX] = "24M|MCS3",
|
|
[IWL_RATE_36M_INDEX] = "36M|MCS4",
|
|
[IWL_RATE_48M_INDEX] = "48M|MCS5",
|
|
[IWL_RATE_54M_INDEX] = "54M|MCS6",
|
|
[IWL_RATE_MCS_7_INDEX] = "MCS7",
|
|
[IWL_RATE_MCS_8_INDEX] = "MCS8",
|
|
[IWL_RATE_MCS_9_INDEX] = "MCS9",
|
|
};
|
|
|
|
char *buff, *pos, *endpos;
|
|
int col, rate;
|
|
ssize_t ret;
|
|
struct iwl_lq_sta *lq_sta = file->private_data;
|
|
struct rs_rate_stats *stats;
|
|
static const size_t bufsz = 1024;
|
|
|
|
buff = kmalloc(bufsz, GFP_KERNEL);
|
|
if (!buff)
|
|
return -ENOMEM;
|
|
|
|
pos = buff;
|
|
endpos = pos + bufsz;
|
|
|
|
pos += scnprintf(pos, endpos - pos, "COLUMN,");
|
|
for (rate = 0; rate < IWL_RATE_COUNT; rate++)
|
|
pos += scnprintf(pos, endpos - pos, "%s,", rate_name[rate]);
|
|
pos += scnprintf(pos, endpos - pos, "\n");
|
|
|
|
for (col = 0; col < RS_COLUMN_COUNT; col++) {
|
|
pos += scnprintf(pos, endpos - pos,
|
|
"%s,", column_name[col]);
|
|
|
|
for (rate = 0; rate < IWL_RATE_COUNT; rate++) {
|
|
stats = &(lq_sta->pers.tx_stats[col][rate]);
|
|
pos += scnprintf(pos, endpos - pos,
|
|
"%llu/%llu,",
|
|
stats->success,
|
|
stats->total);
|
|
}
|
|
pos += scnprintf(pos, endpos - pos, "\n");
|
|
}
|
|
|
|
ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos - buff);
|
|
kfree(buff);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t rs_sta_dbgfs_drv_tx_stats_write(struct file *file,
|
|
const char __user *user_buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct iwl_lq_sta *lq_sta = file->private_data;
|
|
memset(lq_sta->pers.tx_stats, 0, sizeof(lq_sta->pers.tx_stats));
|
|
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops = {
|
|
.read = rs_sta_dbgfs_drv_tx_stats_read,
|
|
.write = rs_sta_dbgfs_drv_tx_stats_write,
|
|
.open = simple_open,
|
|
.llseek = default_llseek,
|
|
};
|
|
|
|
static ssize_t iwl_dbgfs_ss_force_read(struct file *file,
|
|
char __user *user_buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct iwl_lq_sta *lq_sta = file->private_data;
|
|
char buf[12];
|
|
int bufsz = sizeof(buf);
|
|
int pos = 0;
|
|
static const char * const ss_force_name[] = {
|
|
[RS_SS_FORCE_NONE] = "none",
|
|
[RS_SS_FORCE_STBC] = "stbc",
|
|
[RS_SS_FORCE_BFER] = "bfer",
|
|
[RS_SS_FORCE_SISO] = "siso",
|
|
};
|
|
|
|
pos += scnprintf(buf+pos, bufsz-pos, "%s\n",
|
|
ss_force_name[lq_sta->pers.ss_force]);
|
|
return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
|
|
}
|
|
|
|
static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct iwl_mvm *mvm = lq_sta->pers.drv;
|
|
int ret = 0;
|
|
|
|
if (!strncmp("none", buf, 4)) {
|
|
lq_sta->pers.ss_force = RS_SS_FORCE_NONE;
|
|
} else if (!strncmp("siso", buf, 4)) {
|
|
lq_sta->pers.ss_force = RS_SS_FORCE_SISO;
|
|
} else if (!strncmp("stbc", buf, 4)) {
|
|
if (lq_sta->stbc_capable) {
|
|
lq_sta->pers.ss_force = RS_SS_FORCE_STBC;
|
|
} else {
|
|
IWL_ERR(mvm,
|
|
"can't force STBC. peer doesn't support\n");
|
|
ret = -EINVAL;
|
|
}
|
|
} else if (!strncmp("bfer", buf, 4)) {
|
|
if (lq_sta->bfer_capable) {
|
|
lq_sta->pers.ss_force = RS_SS_FORCE_BFER;
|
|
} else {
|
|
IWL_ERR(mvm,
|
|
"can't force BFER. peer doesn't support\n");
|
|
ret = -EINVAL;
|
|
}
|
|
} else {
|
|
IWL_ERR(mvm, "valid values none|siso|stbc|bfer\n");
|
|
ret = -EINVAL;
|
|
}
|
|
return ret ?: count;
|
|
}
|
|
|
|
#define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
|
|
_MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_lq_sta)
|
|
#define MVM_DEBUGFS_ADD_FILE_RS(name, parent, mode) do { \
|
|
if (!debugfs_create_file(#name, mode, parent, lq_sta, \
|
|
&iwl_dbgfs_##name##_ops)) \
|
|
goto err; \
|
|
} while (0)
|
|
|
|
MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32);
|
|
|
|
static void rs_add_debugfs(void *mvm, void *priv_sta, struct dentry *dir)
|
|
{
|
|
struct iwl_lq_sta *lq_sta = priv_sta;
|
|
struct iwl_mvm_sta *mvmsta;
|
|
|
|
mvmsta = container_of(lq_sta, struct iwl_mvm_sta, lq_sta);
|
|
|
|
if (!mvmsta->vif)
|
|
return;
|
|
|
|
debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir,
|
|
lq_sta, &rs_sta_dbgfs_scale_table_ops);
|
|
debugfs_create_file("rate_stats_table", S_IRUSR, dir,
|
|
lq_sta, &rs_sta_dbgfs_stats_table_ops);
|
|
debugfs_create_file("drv_tx_stats", S_IRUSR | S_IWUSR, dir,
|
|
lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops);
|
|
debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir,
|
|
&lq_sta->tx_agg_tid_en);
|
|
debugfs_create_u8("reduced_tpc", S_IRUSR | S_IWUSR, dir,
|
|
&lq_sta->pers.dbg_fixed_txp_reduction);
|
|
|
|
MVM_DEBUGFS_ADD_FILE_RS(ss_force, dir, S_IRUSR | S_IWUSR);
|
|
return;
|
|
err:
|
|
IWL_ERR((struct iwl_mvm *)mvm, "Can't create debugfs entity\n");
|
|
}
|
|
|
|
static void rs_remove_debugfs(void *mvm, void *mvm_sta)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Initialization of rate scaling information is done by driver after
|
|
* the station is added. Since mac80211 calls this function before a
|
|
* station is added we ignore it.
|
|
*/
|
|
static void rs_rate_init_stub(void *mvm_r,
|
|
struct ieee80211_supported_band *sband,
|
|
struct cfg80211_chan_def *chandef,
|
|
struct ieee80211_sta *sta, void *mvm_sta)
|
|
{
|
|
}
|
|
|
|
static const struct rate_control_ops rs_mvm_ops = {
|
|
.name = RS_NAME,
|
|
.tx_status = rs_mac80211_tx_status,
|
|
.get_rate = rs_get_rate,
|
|
.rate_init = rs_rate_init_stub,
|
|
.alloc = rs_alloc,
|
|
.free = rs_free,
|
|
.alloc_sta = rs_alloc_sta,
|
|
.free_sta = rs_free_sta,
|
|
.rate_update = rs_rate_update,
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
.add_sta_debugfs = rs_add_debugfs,
|
|
.remove_sta_debugfs = rs_remove_debugfs,
|
|
#endif
|
|
};
|
|
|
|
int iwl_mvm_rate_control_register(void)
|
|
{
|
|
return ieee80211_rate_control_register(&rs_mvm_ops);
|
|
}
|
|
|
|
void iwl_mvm_rate_control_unregister(void)
|
|
{
|
|
ieee80211_rate_control_unregister(&rs_mvm_ops);
|
|
}
|
|
|
|
/**
|
|
* iwl_mvm_tx_protection - Gets LQ command, change it to enable/disable
|
|
* Tx protection, according to this request and previous requests,
|
|
* and send the LQ command.
|
|
* @mvmsta: The station
|
|
* @enable: Enable Tx protection?
|
|
*/
|
|
int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
|
|
bool enable)
|
|
{
|
|
struct iwl_lq_cmd *lq = &mvmsta->lq_sta.lq;
|
|
|
|
lockdep_assert_held(&mvm->mutex);
|
|
|
|
if (enable) {
|
|
if (mvmsta->tx_protection == 0)
|
|
lq->flags |= LQ_FLAG_USE_RTS_MSK;
|
|
mvmsta->tx_protection++;
|
|
} else {
|
|
mvmsta->tx_protection--;
|
|
if (mvmsta->tx_protection == 0)
|
|
lq->flags &= ~LQ_FLAG_USE_RTS_MSK;
|
|
}
|
|
|
|
return iwl_mvm_send_lq_cmd(mvm, lq, false);
|
|
}
|