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4224 lines
119 KiB
4224 lines
119 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/****************************************************************************** |
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* |
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* Copyright(c) 2005 - 2014, 2018 - 2020 Intel Corporation. All rights reserved. |
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* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
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* Copyright(c) 2016 - 2017 Intel Deutschland GmbH |
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* |
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* Contact Information: |
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* Intel Linux Wireless <[email protected]> |
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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 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_A, |
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[ANT_AB] = ANT_AB, |
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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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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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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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|
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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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rate_n_flags & RATE_MCS_HE_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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if ((rate_n_flags & RATE_MCS_HE_MSK) && |
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(idx <= IWL_LAST_HE_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}, |
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{0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691}, |
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}; |
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static const u16 expected_tpt_siso_160MHz[4][IWL_RATE_COUNT] = { |
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{0, 0, 0, 0, 191, 0, 244, 288, 298, 308, 313, 318, 323, 328, 330}, |
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{0, 0, 0, 0, 200, 0, 251, 293, 302, 312, 317, 322, 327, 332, 334}, |
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{0, 0, 0, 0, 439, 0, 875, 1307, 1736, 2584, 3419, 3831, 4240, 5049, 5581}, |
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{0, 0, 0, 0, 488, 0, 972, 1451, 1925, 2864, 3785, 4240, 4691, 5581, 6165}, |
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}; |
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static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = { |
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{0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0}, |
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{0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0}, |
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{0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0}, |
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{0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0}, |
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}; |
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static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = { |
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{0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300}, |
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{0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303}, |
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{0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053}, |
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{0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221}, |
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}; |
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static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = { |
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{0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319}, |
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{0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320}, |
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{0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219}, |
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{0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545}, |
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}; |
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|
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static const u16 expected_tpt_mimo2_160MHz[4][IWL_RATE_COUNT] = { |
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{0, 0, 0, 0, 240, 0, 278, 308, 313, 319, 322, 324, 328, 330, 334}, |
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{0, 0, 0, 0, 247, 0, 282, 310, 315, 320, 323, 325, 329, 332, 338}, |
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{0, 0, 0, 0, 875, 0, 1735, 2582, 3414, 5043, 6619, 7389, 8147, 9629, 10592}, |
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{0, 0, 0, 0, 971, 0, 1925, 2861, 3779, 5574, 7304, 8147, 8976, 10592, 11640}, |
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}; |
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|
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/* mbps, mcs */ |
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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", |
|
[LQ_HE_SISO] = "HE SISO", |
|
[LQ_HE_MIMO2] = "HE 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; |
|
|
|
IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n", |
|
sta->addr, tid); |
|
|
|
/* start BA session until the peer sends del BA */ |
|
ret = ieee80211_start_tx_ba_session(sta, tid, 0); |
|
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, struct iwl_mvm_sta *mvmsta, |
|
u8 tid, struct iwl_lq_sta *lq_sta, |
|
struct ieee80211_sta *sta) |
|
{ |
|
struct iwl_mvm_tid_data *tid_data; |
|
|
|
/* |
|
* In AP mode, tid can be equal to IWL_MAX_TID_COUNT |
|
* when the frame is not QoS |
|
*/ |
|
if (WARN_ON_ONCE(tid > IWL_MAX_TID_COUNT)) { |
|
IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n", |
|
tid, IWL_MAX_TID_COUNT); |
|
return; |
|
} else if (tid == IWL_MAX_TID_COUNT) { |
|
return; |
|
} |
|
|
|
tid_data = &mvmsta->tid_data[tid]; |
|
if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED && |
|
tid_data->state == IWL_AGG_OFF && |
|
(lq_sta->tx_agg_tid_en & BIT(tid)) && |
|
tid_data->tx_count_last >= IWL_MVM_RS_AGG_START_THRESHOLD) { |
|
IWL_DEBUG_RATE(mvm, "try to aggregate tid %d\n", tid); |
|
if (rs_tl_turn_on_agg_for_tid(mvm, lq_sta, tid, sta) == 0) |
|
tid_data->state = IWL_AGG_QUEUED; |
|
} |
|
} |
|
|
|
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 void rs_update_tid_tpt_stats(struct iwl_mvm *mvm, |
|
struct iwl_mvm_sta *mvmsta, |
|
u8 tid, int successes) |
|
{ |
|
struct iwl_mvm_tid_data *tid_data; |
|
|
|
if (tid >= IWL_MAX_TID_COUNT) |
|
return; |
|
|
|
tid_data = &mvmsta->tid_data[tid]; |
|
|
|
/* |
|
* Measure if there're enough successful transmits per second. |
|
* These statistics are used only to decide if we can start a |
|
* BA session, so it should be updated only when A-MPDU is |
|
* off. |
|
*/ |
|
if (tid_data->state != IWL_AGG_OFF) |
|
return; |
|
|
|
if (time_is_before_jiffies(tid_data->tpt_meas_start + HZ) || |
|
(tid_data->tx_count >= IWL_MVM_RS_AGG_START_THRESHOLD)) { |
|
tid_data->tx_count_last = tid_data->tx_count; |
|
tid_data->tx_count = 0; |
|
tid_data->tpt_meas_start = jiffies; |
|
} else { |
|
tid_data->tx_count += successes; |
|
} |
|
} |
|
|
|
static int rs_collect_tlc_data(struct iwl_mvm *mvm, |
|
struct iwl_mvm_sta *mvmsta, u8 tid, |
|
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 = &mvmsta->lq_sta.rs_drv.pers; |
|
|
|
pers->tx_stats[tbl->column][scale_index].total += attempts; |
|
pers->tx_stats[tbl->column][scale_index].success += successes; |
|
} |
|
|
|
rs_update_tid_tpt_stats(mvm, mvmsta, tid, 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; |
|
} |
|
|
|
/* set RTS protection for all non legacy rates |
|
* This helps with congested environments reducing the conflict cost to |
|
* RTS retries only, instead of the entire BA packet. |
|
*/ |
|
ucode_rate |= RATE_MCS_RTS_REQUIRED_MSK; |
|
|
|
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_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) && |
|
!(ucode_rate & RATE_MCS_HE_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, VHT or HE */ |
|
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_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); |
|
} |
|
} else if (ucode_rate & RATE_MCS_HE_MSK) { |
|
nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >> |
|
RATE_VHT_MCS_NSS_POS) + 1; |
|
|
|
if (nss == 1) { |
|
rate->type = LQ_HE_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_HE_MIMO2; |
|
WARN_ON_ONCE(num_of_ant != 2); |
|
} else { |
|
WARN_ON_ONCE(1); |
|
} |
|
} |
|
|
|
WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 && |
|
!is_he(rate) && !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 || WARN_ON_ONCE(rate->ant & ANT_C)) |
|
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; |
|
if (i >= 0) |
|
mask = BIT(i); |
|
for (; 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 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; |
|
} |
|
|
|
/* |
|
* mac80211 sends us Tx status |
|
*/ |
|
static void rs_drv_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 = mvm_r; |
|
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); |
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
|
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
|
|
|
if (!mvmsta->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); |
|
} |
|
|
|
/* rs uses two tables, one is active and the second is for searching better |
|
* configuration. This function, according to the index of the currently |
|
* active table returns the search table, which is located at the |
|
* index complementary to 1 according to the active table (active = 1, |
|
* search = 0 or active = 0, search = 1). |
|
* Since lq_info is an arary of size 2, make sure index cannot be out of bounds. |
|
*/ |
|
static inline u8 rs_search_tbl(u8 active_tbl) |
|
{ |
|
return (active_tbl ^ 1) & 1; |
|
} |
|
|
|
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) |
|
{ |
|
struct ieee80211_sta_vht_cap *sta_vht_cap = &sta->vht_cap; |
|
struct ieee80211_vht_cap vht_cap = { |
|
.vht_cap_info = cpu_to_le32(sta_vht_cap->cap), |
|
.supp_mcs = sta_vht_cap->vht_mcs, |
|
}; |
|
|
|
switch (sta->bandwidth) { |
|
case IEEE80211_STA_RX_BW_160: |
|
/* |
|
* Don't use 160 MHz if VHT extended NSS support |
|
* says we cannot use 2 streams, we don't want to |
|
* deal with this. |
|
* We only check MCS 0 - they will support that if |
|
* we got here at all and we don't care which MCS, |
|
* we want to determine a more global state. |
|
*/ |
|
if (ieee80211_get_vht_max_nss(&vht_cap, |
|
IEEE80211_VHT_CHANWIDTH_160MHZ, |
|
0, true, |
|
sta->rx_nss) < sta->rx_nss) |
|
return RATE_MCS_CHAN_WIDTH_80; |
|
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 *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
|
int i; |
|
|
|
sta->max_amsdu_len = rs_fw_get_max_amsdu_len(sta); |
|
|
|
/* |
|
* In case TLC offload is not active amsdu_enabled is either 0xFFFF |
|
* or 0, since there is no per-TID alg. |
|
*/ |
|
if ((!is_vht(&tbl->rate) && !is_ht(&tbl->rate)) || |
|
tbl->rate.index < IWL_RATE_MCS_5_INDEX || |
|
scale_action == RS_ACTION_DOWNSCALE) |
|
mvmsta->amsdu_enabled = 0; |
|
else |
|
mvmsta->amsdu_enabled = 0xFFFF; |
|
|
|
if (mvmsta->vif->bss_conf.he_support && |
|
!iwlwifi_mod_params.disable_11ax) |
|
mvmsta->max_amsdu_len = sta->max_amsdu_len; |
|
else |
|
mvmsta->max_amsdu_len = min_t(int, sta->max_amsdu_len, 8500); |
|
|
|
sta->max_rc_amsdu_len = mvmsta->max_amsdu_len; |
|
|
|
for (i = 0; i < IWL_MAX_TID_COUNT; i++) { |
|
if (mvmsta->amsdu_enabled) |
|
sta->max_tid_amsdu_len[i] = |
|
iwl_mvm_max_amsdu_size(mvm, sta, i); |
|
else |
|
/* |
|
* Not so elegant, but this will effectively |
|
* prevent AMSDU on this TID |
|
*/ |
|
sta->max_tid_amsdu_len[i] = 1; |
|
} |
|
} |
|
|
|
/* |
|
* 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); |
|
} |
|
|
|
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 (rs_bw_from_sta_bw(sta) != RATE_MCS_CHAN_WIDTH_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[rs_search_tbl(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 *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
|
struct rs_rate *rate; |
|
|
|
lq_sta->is_agg = !!mvmsta->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 = rs_search_tbl(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[rs_search_tbl(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 (!ndp) |
|
rs_tl_turn_on_agg(mvm, mvmsta, tid, lq_sta, sta); |
|
|
|
if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) { |
|
tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
|
rs_set_stay_in_table(mvm, is_legacy(&tbl1->rate), 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) |
|
{ |
|
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
|
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 = mvmsta->sta_state < IEEE80211_STA_AUTHORIZED ? |
|
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_mvm_sta *mvmsta, |
|
struct ieee80211_rx_status *rx_status) |
|
{ |
|
struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv; |
|
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) |
|
{ |
|
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 = rs_search_tbl(lq_sta->active_tbl); |
|
|
|
tbl = &(lq_sta->lq_info[active_tbl]); |
|
rate = &tbl->rate; |
|
|
|
rs_get_initial_rate(mvm, sta, lq_sta, band, rate); |
|
rs_init_optimal_rate(mvm, sta, lq_sta); |
|
|
|
WARN_ONCE(rate->ant != ANT_A && rate->ant != ANT_B, |
|
"ant: 0x%x, chains 0x%x, fw tx ant: 0x%x, nvm tx ant: 0x%x\n", |
|
rate->ant, lq_sta->pers.chains, mvm->fw->valid_tx_ant, |
|
mvm->nvm_data ? mvm->nvm_data->valid_tx_ant : ANT_INVALID); |
|
|
|
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); |
|
} |
|
|
|
static void rs_drv_get_rate(void *mvm_r, struct ieee80211_sta *sta, |
|
void *mvm_sta, |
|
struct ieee80211_tx_rate_control *txrc) |
|
{ |
|
struct iwl_op_mode *op_mode = mvm_r; |
|
struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); |
|
struct sk_buff *skb = txrc->skb; |
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
|
struct iwl_lq_sta *lq_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; |
|
} |
|
|
|
if (!mvm_sta) |
|
return; |
|
|
|
lq_sta = mvm_sta; |
|
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_drv_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta, |
|
gfp_t gfp) |
|
{ |
|
struct iwl_mvm_sta *mvmsta = 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 = &mvmsta->lq_sta.rs_drv; |
|
|
|
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 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 |
|
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; |
|
|
|
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++; |
|
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++; |
|
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 |
|
*/ |
|
static void rs_drv_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
|
enum nl80211_band band) |
|
{ |
|
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 *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
|
struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv; |
|
struct ieee80211_supported_band *sband; |
|
unsigned long supp; /* must be unsigned long for for_each_set_bit */ |
|
|
|
lockdep_assert_held(&mvmsta->lq_sta.rs_drv.pers.lock); |
|
|
|
/* 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 = mvmsta->sta_id; |
|
mvmsta->amsdu_enabled = 0; |
|
mvmsta->max_amsdu_len = sta->max_amsdu_len; |
|
|
|
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", |
|
mvmsta->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 = |
|
iwl_mvm_bt_coex_get_single_ant_msk(mvm, 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); |
|
} |
|
|
|
static void rs_drv_rate_update(void *mvm_r, |
|
struct ieee80211_supported_band *sband, |
|
struct cfg80211_chan_def *chandef, |
|
struct ieee80211_sta *sta, |
|
void *priv_sta, u32 changed) |
|
{ |
|
struct iwl_op_mode *op_mode = mvm_r; |
|
struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); |
|
u8 tid; |
|
|
|
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, true); |
|
} |
|
|
|
static 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; |
|
u32 tlc_info = (uintptr_t)info->status.status_driver_data[0]; |
|
u8 reduced_txp = tlc_info & RS_DRV_DATA_TXP_MSK; |
|
u8 lq_color = RS_DRV_DATA_LQ_COLOR_GET(tlc_info); |
|
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.rs_drv; |
|
|
|
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)))) { |
|
IWL_DEBUG_RATE(mvm, "Tx idle for too long. reinit rs\n"); |
|
/* reach here only in case of driver RS, call directly |
|
* the unlocked version |
|
*/ |
|
rs_drv_rate_init(mvm, sta, info->band); |
|
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 (lq_color != LQ_FLAG_COLOR_GET(table->flags)) { |
|
IWL_DEBUG_RATE(mvm, |
|
"tx resp color 0x%x does not match 0x%x\n", |
|
lq_color, LQ_FLAG_COLOR_GET(table->flags)); |
|
|
|
/* 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); |
|
} |
|
/* Regardless, ignore this status info for outdated rate */ |
|
return; |
|
} |
|
|
|
/* 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[rs_search_tbl(lq_sta->active_tbl)]; |
|
} else { |
|
curr_tbl = &lq_sta->lq_info[rs_search_tbl(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[rs_search_tbl(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, tx_resp_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, mvmsta, tid, curr_tbl, |
|
tx_resp_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, |
|
tx_resp_rate.index, 1, |
|
i < retries ? 0 : legacy_success, |
|
reduced_txp); |
|
rs_collect_tlc_data(mvm, mvmsta, tid, tmp_tbl, |
|
tx_resp_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); |
|
} |
|
|
|
void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
|
int tid, struct ieee80211_tx_info *info, bool ndp) |
|
{ |
|
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
|
|
|
/* If it's locked we are in middle of init flow |
|
* just wait for next tx status to update the lq_sta data |
|
*/ |
|
if (!spin_trylock(&mvmsta->lq_sta.rs_drv.pers.lock)) |
|
return; |
|
|
|
__iwl_mvm_rs_tx_status(mvm, sta, tid, info, ndp); |
|
spin_unlock(&mvmsta->lq_sta.rs_drv.pers.lock); |
|
} |
|
|
|
#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; |
|
|
|
if (!mvm->trans->trans_cfg->gen2) |
|
lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; |
|
else |
|
lq_cmd->agg_frame_cnt_limit = |
|
LINK_QUAL_AGG_FRAME_LIMIT_GEN2_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] 0x400F019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI |
|
* rate[1] 0x400F019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI |
|
* rate[2] 0x400F018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI |
|
* rate[3] 0x400F018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI |
|
* rate[4] 0x400F017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI |
|
* rate[5] 0x400F017 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; |
|
u32 color; |
|
|
|
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); |
|
|
|
/* update the color of the LQ command (as a counter at bits 1-3) */ |
|
color = LQ_FLAGS_COLOR_INC(LQ_FLAG_COLOR_GET(lq_cmd->flags)); |
|
lq_cmd->flags = LQ_FLAG_COLOR_SET(lq_cmd->flags, color); |
|
} |
|
|
|
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.rs_drv.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.rs_drv.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); |
|
|
|
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 (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2) && |
|
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) |
|
{ |
|
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"); |
|
} |
|
|
|
int rs_pretty_print_rate(char *buf, int bufsz, 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) && |
|
!(rate & RATE_MCS_HE_MSK)) { |
|
int index = iwl_hwrate_to_plcp_idx(rate); |
|
|
|
return scnprintf(buf, bufsz, "Legacy | ANT: %s Rate: %s Mbps", |
|
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; |
|
nss = ((rate & RATE_HT_MCS_NSS_MSK) |
|
>> RATE_HT_MCS_NSS_POS) + 1; |
|
} else if (rate & RATE_MCS_HE_MSK) { |
|
type = "HE"; |
|
mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; |
|
nss = ((rate & RATE_VHT_MCS_NSS_MSK) |
|
>> RATE_VHT_MCS_NSS_POS) + 1; |
|
} 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 scnprintf(buf, bufsz, |
|
"0x%x: %s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s", |
|
rate, type, rs_pretty_ant(ant), bw, mcs, nss, |
|
(rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ", |
|
(rate & RATE_MCS_STBC_MSK) ? "STBC " : "", |
|
(rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "", |
|
(rate & RATE_HE_DUAL_CARRIER_MODE_MSK) ? "DCM " : "", |
|
(rate & RATE_MCS_BF_MSK) ? "BF " : ""); |
|
} |
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS |
|
/* |
|
* 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); |
|
} |
|
} |
|
|
|
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; |
|
static const size_t bufsz = 2048; |
|
|
|
struct iwl_lq_sta *lq_sta = file->private_data; |
|
struct iwl_mvm_sta *mvmsta = |
|
container_of(lq_sta, struct iwl_mvm_sta, lq_sta.rs_drv); |
|
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(bufsz, GFP_KERNEL); |
|
if (!buff) |
|
return -ENOMEM; |
|
|
|
desc += scnprintf(buff + desc, bufsz - desc, |
|
"sta_id %d\n", lq_sta->lq.sta_id); |
|
desc += scnprintf(buff + desc, bufsz - desc, |
|
"failed=%d success=%d rate=0%lX\n", |
|
lq_sta->total_failed, lq_sta->total_success, |
|
lq_sta->active_legacy_rate); |
|
desc += scnprintf(buff + desc, bufsz - desc, "fixed rate 0x%X\n", |
|
lq_sta->pers.dbg_fixed_rate); |
|
desc += scnprintf(buff + desc, bufsz - 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 += scnprintf(buff + desc, bufsz - desc, "lq type %s\n", |
|
(is_legacy(rate)) ? "legacy" : |
|
is_vht(rate) ? "VHT" : "HT"); |
|
if (!is_legacy(rate)) { |
|
desc += scnprintf(buff + desc, bufsz - desc, " %s", |
|
(is_siso(rate)) ? "SISO" : "MIMO2"); |
|
desc += scnprintf(buff + desc, bufsz - desc, " %s", |
|
(is_ht20(rate)) ? "20MHz" : |
|
(is_ht40(rate)) ? "40MHz" : |
|
(is_ht80(rate)) ? "80MHz" : |
|
(is_ht160(rate)) ? "160MHz" : "BAD BW"); |
|
desc += scnprintf(buff + desc, bufsz - desc, " %s %s %s %s\n", |
|
(rate->sgi) ? "SGI" : "NGI", |
|
(rate->ldpc) ? "LDPC" : "BCC", |
|
(lq_sta->is_agg) ? "AGG on" : "", |
|
(mvmsta->amsdu_enabled) ? "AMSDU on" : ""); |
|
} |
|
desc += scnprintf(buff + desc, bufsz - desc, "last tx rate=0x%X\n", |
|
lq_sta->last_rate_n_flags); |
|
desc += scnprintf(buff + desc, bufsz - 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 += scnprintf(buff + desc, bufsz - 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 += scnprintf(buff + desc, bufsz - desc, "reduced tpc=%d\n", |
|
lq_sta->lq.reduced_tpc); |
|
ss_params = le32_to_cpu(lq_sta->lq.ss_params); |
|
desc += scnprintf(buff + desc, bufsz - 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 += scnprintf(buff + desc, bufsz - 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 += scnprintf(buff + desc, bufsz - desc, |
|
" rate[%d] 0x%X ", i, r); |
|
desc += rs_pretty_print_rate(buff + desc, bufsz - desc, r); |
|
if (desc < bufsz - 1) |
|
buff[desc++] = '\n'; |
|
} |
|
|
|
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", |
|
[IWL_RATE_MCS_10_INDEX] = "MCS10", |
|
[IWL_RATE_MCS_11_INDEX] = "MCS11", |
|
}; |
|
|
|
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 { \ |
|
debugfs_create_file(#name, mode, parent, lq_sta, \ |
|
&iwl_dbgfs_##name##_ops); \ |
|
} while (0) |
|
|
|
MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32); |
|
|
|
static void rs_drv_add_sta_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.rs_drv); |
|
|
|
if (!mvmsta->vif) |
|
return; |
|
|
|
debugfs_create_file("rate_scale_table", 0600, dir, |
|
lq_sta, &rs_sta_dbgfs_scale_table_ops); |
|
debugfs_create_file("rate_stats_table", 0400, dir, |
|
lq_sta, &rs_sta_dbgfs_stats_table_ops); |
|
debugfs_create_file("drv_tx_stats", 0600, dir, |
|
lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops); |
|
debugfs_create_u8("tx_agg_tid_enable", 0600, dir, |
|
&lq_sta->tx_agg_tid_en); |
|
debugfs_create_u8("reduced_tpc", 0600, dir, |
|
&lq_sta->pers.dbg_fixed_txp_reduction); |
|
|
|
MVM_DEBUGFS_ADD_FILE_RS(ss_force, dir, 0600); |
|
} |
|
#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_ops(void *mvm_r, |
|
struct ieee80211_supported_band *sband, |
|
struct cfg80211_chan_def *chandef, |
|
struct ieee80211_sta *sta, void *mvm_sta) |
|
{ |
|
} |
|
|
|
/* ops for rate scaling implemented in the driver */ |
|
static const struct rate_control_ops rs_mvm_ops_drv = { |
|
.name = RS_NAME, |
|
.tx_status = rs_drv_mac80211_tx_status, |
|
.get_rate = rs_drv_get_rate, |
|
.rate_init = rs_rate_init_ops, |
|
.alloc = rs_alloc, |
|
.free = rs_free, |
|
.alloc_sta = rs_drv_alloc_sta, |
|
.free_sta = rs_free_sta, |
|
.rate_update = rs_drv_rate_update, |
|
#ifdef CONFIG_MAC80211_DEBUGFS |
|
.add_sta_debugfs = rs_drv_add_sta_debugfs, |
|
#endif |
|
.capa = RATE_CTRL_CAPA_VHT_EXT_NSS_BW, |
|
}; |
|
|
|
void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
|
enum nl80211_band band, bool update) |
|
{ |
|
if (iwl_mvm_has_tlc_offload(mvm)) { |
|
rs_fw_rate_init(mvm, sta, band, update); |
|
} else { |
|
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
|
|
|
spin_lock(&mvmsta->lq_sta.rs_drv.pers.lock); |
|
rs_drv_rate_init(mvm, sta, band); |
|
spin_unlock(&mvmsta->lq_sta.rs_drv.pers.lock); |
|
} |
|
} |
|
|
|
int iwl_mvm_rate_control_register(void) |
|
{ |
|
return ieee80211_rate_control_register(&rs_mvm_ops_drv); |
|
} |
|
|
|
void iwl_mvm_rate_control_unregister(void) |
|
{ |
|
ieee80211_rate_control_unregister(&rs_mvm_ops_drv); |
|
} |
|
|
|
static int rs_drv_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, |
|
bool enable) |
|
{ |
|
struct iwl_lq_cmd *lq = &mvmsta->lq_sta.rs_drv.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); |
|
} |
|
|
|
/** |
|
* iwl_mvm_tx_protection - ask FW to enable RTS/CTS protection |
|
* @mvm: The mvm component |
|
* @mvmsta: The station |
|
* @enable: Enable Tx protection? |
|
*/ |
|
int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, |
|
bool enable) |
|
{ |
|
if (iwl_mvm_has_tlc_offload(mvm)) |
|
return rs_fw_tx_protection(mvm, mvmsta, enable); |
|
else |
|
return rs_drv_tx_protection(mvm, mvmsta, enable); |
|
}
|
|
|