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![Sriram R](/assets/img/avatar_default.png)
Currently in mac80211 each STA object is represented using sta_info datastructure with the associated STA specific information and drivers access ieee80211_sta part of it. With MLO (Multi Link Operation) support being added in 802.11be standard, though the association is logically with a single Multi Link capable STA, at the physical level communication can happen via different advertised links (uniquely identified by Channel, operating class, BSSID) and hence the need to handle multiple link STA parameters within a composite sta_info object called the MLD STA. The different link STA part of MLD STA are identified using the link address which can be same or different as the MLD STA address and unique link id based on the link vif. To support extension of such a model, the sta_info datastructure is modified to hold multiple link STA objects with link specific params currently within sta_info moved to this new structure. Similarly this is done for ieee80211_sta as well which will be accessed within mac80211 as well as by drivers, hence trivial driver changes are expected to support this. For current non MLO supported drivers, only one link STA is present and link information is accessed via 'deflink' member. For MLO drivers, we still need to define the APIs etc. to get the correct link ID and access the correct part of the station info. Currently in mac80211, all link STA info are accessed directly via deflink. These will be updated to access via link pointers indexed by link id with MLO support patches, with link id being 0 for non MLO supported cases. Except for couple of macro related changes, below spatch takes care of updating mac80211 and driver code to access to the link STA info via deflink. @ieee80211_sta@ struct ieee80211_sta *s; struct sta_info *si; identifier var = {supp_rates, ht_cap, vht_cap, he_cap, he_6ghz_capa, eht_cap, rx_nss, bandwidth, txpwr}; @@ ( s-> - var + deflink.var | si->sta. - var + deflink.var ) @sta_info@ struct sta_info *si; identifier var = {gtk, pcpu_rx_stats, rx_stats, rx_stats_avg, status_stats, tx_stats, cur_max_bandwidth}; @@ ( si-> - var + deflink.var ) Signed-off-by: Sriram R <quic_srirrama@quicinc.com> Link: https://lore.kernel.org/r/1649086883-13246-1-git-send-email-quic_srirrama@quicinc.com [remove MLO-drivers notes from commit message, not clear yet; run spatch] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
318 lines
8 KiB
C
318 lines
8 KiB
C
// 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->deflink.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->deflink.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->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_20;
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sgi_40 = sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_40;
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sgi_80 = sta->deflink.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->deflink.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->deflink.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->deflink.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->deflink.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->deflink.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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