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Release 4.11 drivers/net/wireless/realtek/rtlwifi/rc.c

/******************************************************************************
 *
 * Copyright(c) 2009-2012  Realtek Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 * wlanfae <wlanfae@realtek.com>
 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
 * Hsinchu 300, Taiwan.
 *
 * Larry Finger <Larry.Finger@lwfinger.net>
 *
 *****************************************************************************/

#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; /* *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 (get_rf_type(rtlphy) != RF_2T2R) return N_MODE_MCS7_RIX; else return N_MODE_MCS15_RIX; } else if (wireless_mode == WIRELESS_MODE_AC_24G) { return AC_MODE_MCS9_RIX; } return 0; } else { if (wireless_mode == WIRELESS_MODE_A) { return A_MODE_MAX_RIX; } else if (wireless_mode == WIRELESS_MODE_N_5G) { if (get_rf_type(rtlphy) != RF_2T2R) return N_MODE_MCS7_RIX; else return N_MODE_MCS15_RIX; } else if (wireless_mode == WIRELESS_MODE_AC_5G) { return AC_MODE_MCS9_RIX; } return 0; } } }

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Chaoming Li13255.93%120.00%
Larry Finger10243.22%360.00%
Taehee Yoo20.85%120.00%
Total236100.00%5100.00%


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->ht_cap.cap & IEEE80211_HT_CAP_SGI_20; sgi_40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40; sgi_80 = sta->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 (rtlpriv->rtlhal.hw_type == HARDWARE_TYPE_RTL8812AE && wireless_mode == WIRELESS_MODE_AC_5G) rate->idx += 0x10;/*2NSS for 8812AE*/ 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->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; if (sta && (sta->vht_cap.vht_supported)) rate->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; } else { if (mac->bw_40) rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; if (mac->bw_80) rate->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; } if (sgi_20 || sgi_40 || sgi_80) rate->flags |= IEEE80211_TX_RC_SHORT_GI; if (sta && sta->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->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; } }

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Larry Finger25675.52%466.67%
Chaoming Li8224.19%116.67%
Arnd Bergmann10.29%116.67%
Total339100.00%6100.00%


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); if (rate_control_send_low(sta, priv_sta, txrc)) return; 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); } }

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Larry Finger17494.57%150.00%
Chaoming Li105.43%150.00%
Total184100.00%2100.00%


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; }

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Larry Finger6281.58%150.00%
Chaoming Li1418.42%150.00%
Total76100.00%2100.00%

/*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->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); } } } } }

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Larry Finger14770.00%125.00%
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Taehee Yoo20.95%125.00%
Sujith Manoharan20.95%125.00%
Total210100.00%4100.00%


static void rtl_rate_init(void *ppriv, struct ieee80211_supported_band *sband, struct cfg80211_chan_def *chandef, struct ieee80211_sta *sta, void *priv_sta) { }

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Catalin Iacob2382.14%150.00%
Simon Wunderlich517.86%150.00%
Total28100.00%2100.00%


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) { }

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Larry Finger31100.00%1100.00%
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static void *rtl_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) { struct rtl_priv *rtlpriv = rtl_priv(hw); return rtlpriv; }

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Larry Finger30100.00%1100.00%
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static void rtl_rate_free(void *rtlpriv) { return; }

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Larry Finger11100.00%1100.00%
Total11100.00%1100.00%


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(struct rtl_rate_priv), gfp); if (!rate_priv) { pr_err("Unable to allocate private rc structure\n"); return NULL; } rtlpriv->rate_priv = rate_priv; return rate_priv; }

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Larry Finger68100.00%2100.00%
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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); }

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Larry Finger31100.00%1100.00%
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static 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); }

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void rtl_rate_control_unregister(void) { ieee80211_rate_control_unregister(&rtl_rate_ops); }

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Overall Contributors

PersonTokensPropCommitsCommitProp
Larry Finger99874.76%545.45%
Chaoming Li29722.25%19.09%
Catalin Iacob282.10%19.09%
Simon Wunderlich50.37%19.09%
Taehee Yoo40.30%19.09%
Sujith Manoharan20.15%19.09%
Arnd Bergmann10.07%19.09%
Total1335100.00%11100.00%
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