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318 lines
8.0 KiB
318 lines
8.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* Copyright(c) 2009-2012 Realtek Corporation.*/ |
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#include "wifi.h" |
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#include "base.h" |
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#include "rc.h" |
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/* |
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*Finds the highest rate index we can use |
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*if skb is special data like DHCP/EAPOL, we set should |
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*it to lowest rate CCK_1M, otherwise we set rate to |
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*highest rate based on wireless mode used for iwconfig |
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*show Tx rate. |
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*/ |
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static u8 _rtl_rc_get_highest_rix(struct rtl_priv *rtlpriv, |
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struct ieee80211_sta *sta, |
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struct sk_buff *skb, bool not_data) |
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{ |
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struct rtl_hal *rtlhal = rtl_hal(rtlpriv); |
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struct rtl_phy *rtlphy = &(rtlpriv->phy); |
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struct rtl_sta_info *sta_entry = NULL; |
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u16 wireless_mode = 0; |
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u8 nss; |
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struct ieee80211_tx_rate rate; |
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switch (get_rf_type(rtlphy)) { |
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case RF_4T4R: |
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nss = 4; |
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break; |
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case RF_3T3R: |
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nss = 3; |
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break; |
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case RF_2T2R: |
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nss = 2; |
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break; |
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default: |
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nss = 1; |
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break; |
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} |
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/* |
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*this rate is no use for true rate, firmware |
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*will control rate at all it just used for |
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*1.show in iwconfig in B/G mode |
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*2.in rtl_get_tcb_desc when we check rate is |
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* 1M we will not use FW rate but user rate. |
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*/ |
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if (sta) { |
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sta_entry = (struct rtl_sta_info *)sta->drv_priv; |
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wireless_mode = sta_entry->wireless_mode; |
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} |
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if (rtl_is_special_data(rtlpriv->mac80211.hw, skb, true, false) || |
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not_data) { |
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return 0; |
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} else { |
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if (rtlhal->current_bandtype == BAND_ON_2_4G) { |
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if (wireless_mode == WIRELESS_MODE_B) { |
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return B_MODE_MAX_RIX; |
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} else if (wireless_mode == WIRELESS_MODE_G) { |
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return G_MODE_MAX_RIX; |
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} else if (wireless_mode == WIRELESS_MODE_N_24G) { |
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if (nss == 1) |
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return N_MODE_MCS7_RIX; |
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else |
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return N_MODE_MCS15_RIX; |
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} else if (wireless_mode == WIRELESS_MODE_AC_24G) { |
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if (sta->bandwidth == IEEE80211_STA_RX_BW_20) { |
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ieee80211_rate_set_vht(&rate, |
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AC_MODE_MCS8_RIX, |
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nss); |
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goto out; |
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} else { |
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ieee80211_rate_set_vht(&rate, |
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AC_MODE_MCS9_RIX, |
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nss); |
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goto out; |
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} |
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} |
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return 0; |
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} else { |
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if (wireless_mode == WIRELESS_MODE_A) { |
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return A_MODE_MAX_RIX; |
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} else if (wireless_mode == WIRELESS_MODE_N_5G) { |
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if (nss == 1) |
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return N_MODE_MCS7_RIX; |
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else |
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return N_MODE_MCS15_RIX; |
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} else if (wireless_mode == WIRELESS_MODE_AC_5G) { |
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if (sta->bandwidth == IEEE80211_STA_RX_BW_20) { |
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ieee80211_rate_set_vht(&rate, |
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AC_MODE_MCS8_RIX, |
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nss); |
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goto out; |
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} else { |
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ieee80211_rate_set_vht(&rate, |
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AC_MODE_MCS9_RIX, |
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nss); |
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goto out; |
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} |
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} |
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return 0; |
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} |
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} |
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out: |
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return rate.idx; |
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} |
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static void _rtl_rc_rate_set_series(struct rtl_priv *rtlpriv, |
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struct ieee80211_sta *sta, |
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struct ieee80211_tx_rate *rate, |
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struct ieee80211_tx_rate_control *txrc, |
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u8 tries, s8 rix, int rtsctsenable, |
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bool not_data) |
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{ |
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struct rtl_mac *mac = rtl_mac(rtlpriv); |
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struct rtl_sta_info *sta_entry = NULL; |
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u16 wireless_mode = 0; |
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u8 sgi_20 = 0, sgi_40 = 0, sgi_80 = 0; |
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if (sta) { |
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sgi_20 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20; |
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sgi_40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40; |
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sgi_80 = sta->vht_cap.cap & IEEE80211_VHT_CAP_SHORT_GI_80; |
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sta_entry = (struct rtl_sta_info *)sta->drv_priv; |
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wireless_mode = sta_entry->wireless_mode; |
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} |
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rate->count = tries; |
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rate->idx = rix >= 0x00 ? rix : 0x00; |
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if (!not_data) { |
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if (txrc->short_preamble) |
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rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE; |
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if (mac->opmode == NL80211_IFTYPE_AP || |
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mac->opmode == NL80211_IFTYPE_ADHOC) { |
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if (sta && (sta->ht_cap.cap & |
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IEEE80211_HT_CAP_SUP_WIDTH_20_40)) |
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rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
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if (sta && sta->vht_cap.vht_supported) |
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rate->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; |
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} else { |
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if (mac->bw_80) |
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rate->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; |
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else if (mac->bw_40) |
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rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
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} |
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if (sgi_20 || sgi_40 || sgi_80) |
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rate->flags |= IEEE80211_TX_RC_SHORT_GI; |
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if (sta && sta->ht_cap.ht_supported && |
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(wireless_mode == WIRELESS_MODE_N_5G || |
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wireless_mode == WIRELESS_MODE_N_24G)) |
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rate->flags |= IEEE80211_TX_RC_MCS; |
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if (sta && sta->vht_cap.vht_supported && |
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(wireless_mode == WIRELESS_MODE_AC_5G || |
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wireless_mode == WIRELESS_MODE_AC_24G || |
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wireless_mode == WIRELESS_MODE_AC_ONLY)) |
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rate->flags |= IEEE80211_TX_RC_VHT_MCS; |
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} |
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} |
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static void rtl_get_rate(void *ppriv, struct ieee80211_sta *sta, |
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void *priv_sta, |
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struct ieee80211_tx_rate_control *txrc) |
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{ |
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struct rtl_priv *rtlpriv = ppriv; |
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struct sk_buff *skb = txrc->skb; |
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struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
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struct ieee80211_tx_rate *rates = tx_info->control.rates; |
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__le16 fc = rtl_get_fc(skb); |
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u8 try_per_rate, i, rix; |
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bool not_data = !ieee80211_is_data(fc); |
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rix = _rtl_rc_get_highest_rix(rtlpriv, sta, skb, not_data); |
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try_per_rate = 1; |
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_rtl_rc_rate_set_series(rtlpriv, sta, &rates[0], txrc, |
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try_per_rate, rix, 1, not_data); |
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if (!not_data) { |
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for (i = 1; i < 4; i++) |
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_rtl_rc_rate_set_series(rtlpriv, sta, &rates[i], |
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txrc, i, (rix - i), 1, |
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not_data); |
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} |
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} |
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static bool _rtl_tx_aggr_check(struct rtl_priv *rtlpriv, |
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struct rtl_sta_info *sta_entry, u16 tid) |
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{ |
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struct rtl_mac *mac = rtl_mac(rtlpriv); |
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if (mac->act_scanning) |
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return false; |
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if (mac->opmode == NL80211_IFTYPE_STATION && |
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mac->cnt_after_linked < 3) |
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return false; |
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if (sta_entry->tids[tid].agg.agg_state == RTL_AGG_STOP) |
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return true; |
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return false; |
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} |
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/*mac80211 Rate Control callbacks*/ |
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static void rtl_tx_status(void *ppriv, |
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struct ieee80211_supported_band *sband, |
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struct ieee80211_sta *sta, void *priv_sta, |
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struct sk_buff *skb) |
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{ |
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struct rtl_priv *rtlpriv = ppriv; |
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struct rtl_mac *mac = rtl_mac(rtlpriv); |
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struct ieee80211_hdr *hdr = rtl_get_hdr(skb); |
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__le16 fc = rtl_get_fc(skb); |
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struct rtl_sta_info *sta_entry; |
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if (!priv_sta || !ieee80211_is_data(fc)) |
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return; |
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if (rtl_is_special_data(mac->hw, skb, true, true)) |
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return; |
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if (is_multicast_ether_addr(ieee80211_get_DA(hdr)) || |
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is_broadcast_ether_addr(ieee80211_get_DA(hdr))) |
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return; |
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if (sta) { |
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/* Check if aggregation has to be enabled for this tid */ |
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sta_entry = (struct rtl_sta_info *)sta->drv_priv; |
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if (sta->ht_cap.ht_supported && |
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!(skb->protocol == cpu_to_be16(ETH_P_PAE))) { |
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if (ieee80211_is_data_qos(fc)) { |
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u8 tid = rtl_get_tid(skb); |
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if (_rtl_tx_aggr_check(rtlpriv, sta_entry, |
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tid)) { |
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sta_entry->tids[tid].agg.agg_state = |
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RTL_AGG_PROGRESS; |
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ieee80211_start_tx_ba_session(sta, tid, |
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5000); |
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} |
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} |
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} |
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} |
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} |
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static void rtl_rate_init(void *ppriv, |
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struct ieee80211_supported_band *sband, |
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struct cfg80211_chan_def *chandef, |
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struct ieee80211_sta *sta, void *priv_sta) |
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{ |
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} |
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static void rtl_rate_update(void *ppriv, |
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struct ieee80211_supported_band *sband, |
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struct cfg80211_chan_def *chandef, |
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struct ieee80211_sta *sta, void *priv_sta, |
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u32 changed) |
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{ |
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} |
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static void *rtl_rate_alloc(struct ieee80211_hw *hw) |
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{ |
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struct rtl_priv *rtlpriv = rtl_priv(hw); |
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return rtlpriv; |
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} |
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static void rtl_rate_free(void *rtlpriv) |
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{ |
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return; |
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} |
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static void *rtl_rate_alloc_sta(void *ppriv, |
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struct ieee80211_sta *sta, gfp_t gfp) |
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{ |
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struct rtl_priv *rtlpriv = ppriv; |
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struct rtl_rate_priv *rate_priv; |
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rate_priv = kzalloc(sizeof(*rate_priv), gfp); |
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if (!rate_priv) |
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return NULL; |
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rtlpriv->rate_priv = rate_priv; |
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return rate_priv; |
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} |
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static void rtl_rate_free_sta(void *rtlpriv, |
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struct ieee80211_sta *sta, void *priv_sta) |
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{ |
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struct rtl_rate_priv *rate_priv = priv_sta; |
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kfree(rate_priv); |
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} |
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static const struct rate_control_ops rtl_rate_ops = { |
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.name = "rtl_rc", |
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.alloc = rtl_rate_alloc, |
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.free = rtl_rate_free, |
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.alloc_sta = rtl_rate_alloc_sta, |
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.free_sta = rtl_rate_free_sta, |
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.rate_init = rtl_rate_init, |
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.rate_update = rtl_rate_update, |
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.tx_status = rtl_tx_status, |
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.get_rate = rtl_get_rate, |
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}; |
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int rtl_rate_control_register(void) |
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{ |
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return ieee80211_rate_control_register(&rtl_rate_ops); |
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} |
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void rtl_rate_control_unregister(void) |
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{ |
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ieee80211_rate_control_unregister(&rtl_rate_ops); |
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}
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