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