^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright 2002-2005, Instant802 Networks, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright 2005-2006, Devicescape Software, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright 2017 Intel Deutschland GmbH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "rate.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "ieee80211_i.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "debugfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct rate_control_alg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) const struct rate_control_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static LIST_HEAD(rate_ctrl_algs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static DEFINE_MUTEX(rate_ctrl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static char *ieee80211_default_rc_algo = CONFIG_MAC80211_RC_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) module_param(ieee80211_default_rc_algo, charp, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) MODULE_PARM_DESC(ieee80211_default_rc_algo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) "Default rate control algorithm for mac80211 to use");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) void rate_control_rate_init(struct sta_info *sta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct ieee80211_local *local = sta->sdata->local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct rate_control_ref *ref = sta->rate_ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct ieee80211_sta *ista = &sta->sta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) void *priv_sta = sta->rate_ctrl_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct ieee80211_supported_band *sband;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct ieee80211_chanctx_conf *chanctx_conf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) ieee80211_sta_set_rx_nss(sta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (!ref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if (WARN_ON(!chanctx_conf)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) sband = local->hw.wiphy->bands[chanctx_conf->def.chan->band];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /* TODO: check for minstrel_s1g ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (sband->band == NL80211_BAND_S1GHZ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) ieee80211_s1g_sta_rate_init(sta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) spin_lock_bh(&sta->rate_ctrl_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) ref->ops->rate_init(ref->priv, sband, &chanctx_conf->def, ista,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) priv_sta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) spin_unlock_bh(&sta->rate_ctrl_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) set_sta_flag(sta, WLAN_STA_RATE_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) void rate_control_tx_status(struct ieee80211_local *local,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct ieee80211_supported_band *sband,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct ieee80211_tx_status *st)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct rate_control_ref *ref = local->rate_ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct sta_info *sta = container_of(st->sta, struct sta_info, sta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) void *priv_sta = sta->rate_ctrl_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) spin_lock_bh(&sta->rate_ctrl_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (ref->ops->tx_status_ext)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ref->ops->tx_status_ext(ref->priv, sband, priv_sta, st);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) else if (st->skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) ref->ops->tx_status(ref->priv, sband, st->sta, priv_sta, st->skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) WARN_ON_ONCE(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) spin_unlock_bh(&sta->rate_ctrl_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) void rate_control_rate_update(struct ieee80211_local *local,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct ieee80211_supported_band *sband,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct sta_info *sta, u32 changed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct rate_control_ref *ref = local->rate_ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct ieee80211_sta *ista = &sta->sta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) void *priv_sta = sta->rate_ctrl_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct ieee80211_chanctx_conf *chanctx_conf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (ref && ref->ops->rate_update) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (WARN_ON(!chanctx_conf)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) spin_lock_bh(&sta->rate_ctrl_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ref->ops->rate_update(ref->priv, sband, &chanctx_conf->def,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) ista, priv_sta, changed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) spin_unlock_bh(&sta->rate_ctrl_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) int ieee80211_rate_control_register(const struct rate_control_ops *ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct rate_control_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (!ops->name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) mutex_lock(&rate_ctrl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) list_for_each_entry(alg, &rate_ctrl_algs, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (!strcmp(alg->ops->name, ops->name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /* don't register an algorithm twice */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) WARN_ON(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) mutex_unlock(&rate_ctrl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return -EALREADY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) alg = kzalloc(sizeof(*alg), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (alg == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) mutex_unlock(&rate_ctrl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) alg->ops = ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) list_add_tail(&alg->list, &rate_ctrl_algs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) mutex_unlock(&rate_ctrl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) EXPORT_SYMBOL(ieee80211_rate_control_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) void ieee80211_rate_control_unregister(const struct rate_control_ops *ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct rate_control_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) mutex_lock(&rate_ctrl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) list_for_each_entry(alg, &rate_ctrl_algs, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (alg->ops == ops) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) list_del(&alg->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) kfree(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) mutex_unlock(&rate_ctrl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) EXPORT_SYMBOL(ieee80211_rate_control_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static const struct rate_control_ops *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) ieee80211_try_rate_control_ops_get(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) struct rate_control_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) const struct rate_control_ops *ops = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (!name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) mutex_lock(&rate_ctrl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) list_for_each_entry(alg, &rate_ctrl_algs, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (!strcmp(alg->ops->name, name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) ops = alg->ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) mutex_unlock(&rate_ctrl_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /* Get the rate control algorithm. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static const struct rate_control_ops *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) ieee80211_rate_control_ops_get(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) const struct rate_control_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) const char *alg_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) kernel_param_lock(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (!name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) alg_name = ieee80211_default_rc_algo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) alg_name = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) ops = ieee80211_try_rate_control_ops_get(alg_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (!ops && name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) /* try default if specific alg requested but not found */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) ops = ieee80211_try_rate_control_ops_get(ieee80211_default_rc_algo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) /* Note: check for > 0 is intentional to avoid clang warning */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) if (!ops && (strlen(CONFIG_MAC80211_RC_DEFAULT) > 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /* try built-in one if specific alg requested but not found */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) ops = ieee80211_try_rate_control_ops_get(CONFIG_MAC80211_RC_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) kernel_param_unlock(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) #ifdef CONFIG_MAC80211_DEBUGFS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static ssize_t rcname_read(struct file *file, char __user *userbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) struct rate_control_ref *ref = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) int len = strlen(ref->ops->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return simple_read_from_buffer(userbuf, count, ppos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) ref->ops->name, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) const struct file_operations rcname_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) .read = rcname_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) .open = simple_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) .llseek = default_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static struct rate_control_ref *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) rate_control_alloc(const char *name, struct ieee80211_local *local)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) struct rate_control_ref *ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) ref = kmalloc(sizeof(struct rate_control_ref), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (!ref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) ref->ops = ieee80211_rate_control_ops_get(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) if (!ref->ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) goto free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) ref->priv = ref->ops->alloc(&local->hw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (!ref->priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) goto free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) return ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) kfree(ref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) static void rate_control_free(struct ieee80211_local *local,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct rate_control_ref *ctrl_ref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) ctrl_ref->ops->free(ctrl_ref->priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) #ifdef CONFIG_MAC80211_DEBUGFS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) debugfs_remove_recursive(local->debugfs.rcdir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) local->debugfs.rcdir = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) kfree(ctrl_ref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) void ieee80211_check_rate_mask(struct ieee80211_sub_if_data *sdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) struct ieee80211_local *local = sdata->local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct ieee80211_supported_band *sband;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) u32 user_mask, basic_rates = sdata->vif.bss_conf.basic_rates;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) enum nl80211_band band;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) if (WARN_ON(!sdata->vif.bss_conf.chandef.chan))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) band = sdata->vif.bss_conf.chandef.chan->band;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (band == NL80211_BAND_S1GHZ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) /* TODO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) if (WARN_ON_ONCE(!basic_rates))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) user_mask = sdata->rc_rateidx_mask[band];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) sband = local->hw.wiphy->bands[band];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if (user_mask & basic_rates)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) sdata_dbg(sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) "no overlap between basic rates (0x%x) and user mask (0x%x on band %d) - clearing the latter",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) basic_rates, user_mask, band);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) sdata->rc_rateidx_mask[band] = (1 << sband->n_bitrates) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static bool rc_no_data_or_no_ack_use_min(struct ieee80211_tx_rate_control *txrc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) struct sk_buff *skb = txrc->skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) __le16 fc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) fc = hdr->frame_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) return (info->flags & (IEEE80211_TX_CTL_NO_ACK |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) IEEE80211_TX_CTL_USE_MINRATE)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) !ieee80211_is_data(fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) static void rc_send_low_basicrate(struct ieee80211_tx_rate *rate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) u32 basic_rates,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) struct ieee80211_supported_band *sband)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) u8 i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (sband->band == NL80211_BAND_S1GHZ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /* TODO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) rate->flags |= IEEE80211_TX_RC_S1G_MCS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) rate->idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) if (basic_rates == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) return; /* assume basic rates unknown and accept rate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (rate->idx < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (basic_rates & (1 << rate->idx))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) return; /* selected rate is a basic rate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) for (i = rate->idx + 1; i <= sband->n_bitrates; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (basic_rates & (1 << i)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) rate->idx = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) /* could not find a basic rate; use original selection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static void __rate_control_send_low(struct ieee80211_hw *hw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) struct ieee80211_supported_band *sband,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) struct ieee80211_sta *sta,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) struct ieee80211_tx_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) u32 rate_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) u32 rate_flags =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) ieee80211_chandef_rate_flags(&hw->conf.chandef);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (sband->band == NL80211_BAND_S1GHZ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) info->control.rates[0].flags |= IEEE80211_TX_RC_S1G_MCS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) info->control.rates[0].idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if ((sband->band == NL80211_BAND_2GHZ) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) rate_flags |= IEEE80211_RATE_ERP_G;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) info->control.rates[0].idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) for (i = 0; i < sband->n_bitrates; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (!(rate_mask & BIT(i)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) if (!rate_supported(sta, sband->band, i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) info->control.rates[0].idx = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) WARN_ONCE(i == sband->n_bitrates,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) "no supported rates for sta %pM (0x%x, band %d) in rate_mask 0x%x with flags 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) sta ? sta->addr : NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) sta ? sta->supp_rates[sband->band] : -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) sband->band,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) rate_mask, rate_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) info->control.rates[0].count =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) (info->flags & IEEE80211_TX_CTL_NO_ACK) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 1 : hw->max_rate_tries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) info->control.skip_table = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) static bool rate_control_send_low(struct ieee80211_sta *pubsta,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) struct ieee80211_tx_rate_control *txrc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) struct ieee80211_supported_band *sband = txrc->sband;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) struct sta_info *sta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) int mcast_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) bool use_basicrate = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (!pubsta || rc_no_data_or_no_ack_use_min(txrc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) __rate_control_send_low(txrc->hw, sband, pubsta, info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) txrc->rate_idx_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (!pubsta && txrc->bss) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) mcast_rate = txrc->bss_conf->mcast_rate[sband->band];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) if (mcast_rate > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) info->control.rates[0].idx = mcast_rate - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) use_basicrate = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) } else if (pubsta) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) sta = container_of(pubsta, struct sta_info, sta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) if (ieee80211_vif_is_mesh(&sta->sdata->vif))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) use_basicrate = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (use_basicrate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) rc_send_low_basicrate(&info->control.rates[0],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) txrc->bss_conf->basic_rates,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) sband);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) static bool rate_idx_match_legacy_mask(s8 *rate_idx, int n_bitrates, u32 mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) int j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /* See whether the selected rate or anything below it is allowed. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) for (j = *rate_idx; j >= 0; j--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) if (mask & (1 << j)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) /* Okay, found a suitable rate. Use it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) *rate_idx = j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) /* Try to find a higher rate that would be allowed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) for (j = *rate_idx + 1; j < n_bitrates; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (mask & (1 << j)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) /* Okay, found a suitable rate. Use it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) *rate_idx = j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) static bool rate_idx_match_mcs_mask(s8 *rate_idx, u8 *mcs_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) int i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) int ridx, rbit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) ridx = *rate_idx / 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) rbit = *rate_idx % 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) /* sanity check */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (ridx < 0 || ridx >= IEEE80211_HT_MCS_MASK_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) /* See whether the selected rate or anything below it is allowed. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) for (i = ridx; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) for (j = rbit; j >= 0; j--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) if (mcs_mask[i] & BIT(j)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) *rate_idx = i * 8 + j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) rbit = 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) /* Try to find a higher rate that would be allowed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) ridx = (*rate_idx + 1) / 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) rbit = (*rate_idx + 1) % 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) for (i = ridx; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) for (j = rbit; j < 8; j++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) if (mcs_mask[i] & BIT(j)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) *rate_idx = i * 8 + j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) rbit = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) static bool rate_idx_match_vht_mcs_mask(s8 *rate_idx, u16 *vht_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) int i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) int ridx, rbit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) ridx = *rate_idx >> 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) rbit = *rate_idx & 0xf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (ridx < 0 || ridx >= NL80211_VHT_NSS_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) /* See whether the selected rate or anything below it is allowed. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) for (i = ridx; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) for (j = rbit; j >= 0; j--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) if (vht_mask[i] & BIT(j)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) *rate_idx = (i << 4) | j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) rbit = 15;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) /* Try to find a higher rate that would be allowed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) ridx = (*rate_idx + 1) >> 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) rbit = (*rate_idx + 1) & 0xf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) for (i = ridx; i < NL80211_VHT_NSS_MAX; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) for (j = rbit; j < 16; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (vht_mask[i] & BIT(j)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) *rate_idx = (i << 4) | j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) rbit = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) static void rate_idx_match_mask(s8 *rate_idx, u16 *rate_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) struct ieee80211_supported_band *sband,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) enum nl80211_chan_width chan_width,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) u32 mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) u16 vht_mask[NL80211_VHT_NSS_MAX])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (*rate_flags & IEEE80211_TX_RC_VHT_MCS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) /* handle VHT rates */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) if (rate_idx_match_vht_mcs_mask(rate_idx, vht_mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) *rate_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) /* keep protection flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) *rate_flags &= (IEEE80211_TX_RC_USE_RTS_CTS |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) IEEE80211_TX_RC_USE_CTS_PROTECT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) *rate_flags |= IEEE80211_TX_RC_MCS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) if (chan_width == NL80211_CHAN_WIDTH_40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) *rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) if (rate_idx_match_mcs_mask(rate_idx, mcs_mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) /* also try the legacy rates. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) *rate_flags &= ~(IEEE80211_TX_RC_MCS |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) IEEE80211_TX_RC_40_MHZ_WIDTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) if (rate_idx_match_legacy_mask(rate_idx, sband->n_bitrates,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) } else if (*rate_flags & IEEE80211_TX_RC_MCS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) /* handle HT rates */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) if (rate_idx_match_mcs_mask(rate_idx, mcs_mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) /* also try the legacy rates. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) *rate_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) /* keep protection flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) *rate_flags &= (IEEE80211_TX_RC_USE_RTS_CTS |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) IEEE80211_TX_RC_USE_CTS_PROTECT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) if (rate_idx_match_legacy_mask(rate_idx, sband->n_bitrates,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) /* handle legacy rates */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (rate_idx_match_legacy_mask(rate_idx, sband->n_bitrates,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) /* if HT BSS, and we handle a data frame, also try HT rates */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) switch (chan_width) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) case NL80211_CHAN_WIDTH_20_NOHT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) case NL80211_CHAN_WIDTH_5:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) case NL80211_CHAN_WIDTH_10:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) *rate_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) /* keep protection flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) *rate_flags &= (IEEE80211_TX_RC_USE_RTS_CTS |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) IEEE80211_TX_RC_USE_CTS_PROTECT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) *rate_flags |= IEEE80211_TX_RC_MCS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) if (chan_width == NL80211_CHAN_WIDTH_40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) *rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (rate_idx_match_mcs_mask(rate_idx, mcs_mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) * Uh.. No suitable rate exists. This should not really happen with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) * sane TX rate mask configurations. However, should someone manage to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) * configure supported rates and TX rate mask in incompatible way,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) * allow the frame to be transmitted with whatever the rate control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) * selected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) static void rate_fixup_ratelist(struct ieee80211_vif *vif,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) struct ieee80211_supported_band *sband,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) struct ieee80211_tx_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) struct ieee80211_tx_rate *rates,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) int max_rates)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) struct ieee80211_rate *rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) bool inval = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) * Set up the RTS/CTS rate as the fastest basic rate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) * that is not faster than the data rate unless there
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) * is no basic rate slower than the data rate, in which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) * case we pick the slowest basic rate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) * XXX: Should this check all retry rates?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) if (!(rates[0].flags &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) u32 basic_rates = vif->bss_conf.basic_rates;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) s8 baserate = basic_rates ? ffs(basic_rates) - 1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) rate = &sband->bitrates[rates[0].idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) for (i = 0; i < sband->n_bitrates; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) /* must be a basic rate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) if (!(basic_rates & BIT(i)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) /* must not be faster than the data rate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) if (sband->bitrates[i].bitrate > rate->bitrate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) /* maximum */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) if (sband->bitrates[baserate].bitrate <
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) sband->bitrates[i].bitrate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) baserate = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) info->control.rts_cts_rate_idx = baserate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) for (i = 0; i < max_rates; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) * make sure there's no valid rate following
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) * an invalid one, just in case drivers don't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) * take the API seriously to stop at -1.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) if (inval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) rates[i].idx = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) if (rates[i].idx < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) inval = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) * For now assume MCS is already set up correctly, this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) * needs to be fixed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) if (rates[i].flags & IEEE80211_TX_RC_MCS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) WARN_ON(rates[i].idx > 76);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) if (!(rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) info->control.use_cts_prot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) rates[i].flags |=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) IEEE80211_TX_RC_USE_CTS_PROTECT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) if (rates[i].flags & IEEE80211_TX_RC_VHT_MCS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) WARN_ON(ieee80211_rate_get_vht_mcs(&rates[i]) > 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) /* set up RTS protection if desired */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) if (info->control.use_rts) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) rates[i].flags |= IEEE80211_TX_RC_USE_RTS_CTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) info->control.use_cts_prot = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) /* RC is busted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) if (WARN_ON_ONCE(rates[i].idx >= sband->n_bitrates)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) rates[i].idx = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) rate = &sband->bitrates[rates[i].idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) /* set up short preamble */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) if (info->control.short_preamble &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) rates[i].flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) /* set up G protection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) if (!(rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) info->control.use_cts_prot &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) rate->flags & IEEE80211_RATE_ERP_G)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) rates[i].flags |= IEEE80211_TX_RC_USE_CTS_PROTECT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) static void rate_control_fill_sta_table(struct ieee80211_sta *sta,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) struct ieee80211_tx_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) struct ieee80211_tx_rate *rates,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) int max_rates)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) struct ieee80211_sta_rates *ratetbl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) if (sta && !info->control.skip_table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) ratetbl = rcu_dereference(sta->rates);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) /* Fill remaining rate slots with data from the sta rate table. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) max_rates = min_t(int, max_rates, IEEE80211_TX_RATE_TABLE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) for (i = 0; i < max_rates; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) if (i < ARRAY_SIZE(info->control.rates) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) info->control.rates[i].idx >= 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) info->control.rates[i].count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) if (rates != info->control.rates)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) rates[i] = info->control.rates[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) } else if (ratetbl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) rates[i].idx = ratetbl->rate[i].idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) rates[i].flags = ratetbl->rate[i].flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) if (info->control.use_rts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) rates[i].count = ratetbl->rate[i].count_rts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) else if (info->control.use_cts_prot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) rates[i].count = ratetbl->rate[i].count_cts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) rates[i].count = ratetbl->rate[i].count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) rates[i].idx = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) rates[i].count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) if (rates[i].idx < 0 || !rates[i].count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) static bool rate_control_cap_mask(struct ieee80211_sub_if_data *sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) struct ieee80211_supported_band *sband,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) struct ieee80211_sta *sta, u32 *mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) u16 vht_mask[NL80211_VHT_NSS_MAX])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) u32 i, flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) *mask = sdata->rc_rateidx_mask[sband->band];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) for (i = 0; i < sband->n_bitrates; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) if ((flags & sband->bitrates[i].flags) != flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) *mask &= ~BIT(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) if (*mask == (1 << sband->n_bitrates) - 1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) !sdata->rc_has_mcs_mask[sband->band] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) !sdata->rc_has_vht_mcs_mask[sband->band])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) if (sdata->rc_has_mcs_mask[sband->band])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) memcpy(mcs_mask, sdata->rc_rateidx_mcs_mask[sband->band],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) IEEE80211_HT_MCS_MASK_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) memset(mcs_mask, 0xff, IEEE80211_HT_MCS_MASK_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) if (sdata->rc_has_vht_mcs_mask[sband->band])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) memcpy(vht_mask, sdata->rc_rateidx_vht_mcs_mask[sband->band],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) sizeof(u16) * NL80211_VHT_NSS_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) memset(vht_mask, 0xff, sizeof(u16) * NL80211_VHT_NSS_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) if (sta) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) __le16 sta_vht_cap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) u16 sta_vht_mask[NL80211_VHT_NSS_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) /* Filter out rates that the STA does not support */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) *mask &= sta->supp_rates[sband->band];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) mcs_mask[i] &= sta->ht_cap.mcs.rx_mask[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) sta_vht_cap = sta->vht_cap.vht_mcs.rx_mcs_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) ieee80211_get_vht_mask_from_cap(sta_vht_cap, sta_vht_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) vht_mask[i] &= sta_vht_mask[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) rate_control_apply_mask_ratetbl(struct sta_info *sta,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) struct ieee80211_supported_band *sband,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) struct ieee80211_sta_rates *rates)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) u16 vht_mask[NL80211_VHT_NSS_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) enum nl80211_chan_width chan_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) if (!rate_control_cap_mask(sta->sdata, sband, &sta->sta, &mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) mcs_mask, vht_mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) chan_width = sta->sdata->vif.bss_conf.chandef.width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) for (i = 0; i < IEEE80211_TX_RATE_TABLE_SIZE; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) if (rates->rate[i].idx < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) rate_idx_match_mask(&rates->rate[i].idx, &rates->rate[i].flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) sband, chan_width, mask, mcs_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) vht_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) struct ieee80211_sta *sta,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) struct ieee80211_supported_band *sband,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) struct ieee80211_tx_rate *rates,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) int max_rates)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) enum nl80211_chan_width chan_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) u16 rate_flags, vht_mask[NL80211_VHT_NSS_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) * Try to enforce the rateidx mask the user wanted. skip this if the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) * default mask (allow all rates) is used to save some processing for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) * the common case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) if (!rate_control_cap_mask(sdata, sband, sta, &mask, mcs_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) vht_mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) * Make sure the rate index selected for each TX rate is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) * included in the configured mask and change the rate indexes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) * if needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) chan_width = sdata->vif.bss_conf.chandef.width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) for (i = 0; i < max_rates; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) /* Skip invalid rates */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) if (rates[i].idx < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) rate_flags = rates[i].flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) rate_idx_match_mask(&rates[i].idx, &rate_flags, sband,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) chan_width, mask, mcs_mask, vht_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) rates[i].flags = rate_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) void ieee80211_get_tx_rates(struct ieee80211_vif *vif,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) struct ieee80211_sta *sta,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) struct ieee80211_tx_rate *dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) int max_rates)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) struct ieee80211_sub_if_data *sdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) struct ieee80211_supported_band *sband;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) rate_control_fill_sta_table(sta, info, dest, max_rates);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) if (!vif)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) sdata = vif_to_sdata(vif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) sband = sdata->local->hw.wiphy->bands[info->band];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) if (ieee80211_is_data(hdr->frame_control))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) rate_control_apply_mask(sdata, sta, sband, dest, max_rates);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) if (dest[0].idx < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) __rate_control_send_low(&sdata->local->hw, sband, sta, info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) sdata->rc_rateidx_mask[info->band]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) if (sta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) rate_fixup_ratelist(vif, sband, info, dest, max_rates);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) EXPORT_SYMBOL(ieee80211_get_tx_rates);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) struct sta_info *sta,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) struct ieee80211_tx_rate_control *txrc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) struct rate_control_ref *ref = sdata->local->rate_ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) void *priv_sta = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) struct ieee80211_sta *ista = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) info->control.rates[i].idx = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) info->control.rates[i].flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) info->control.rates[i].count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) if (rate_control_send_low(sta ? &sta->sta : NULL, txrc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) if (ieee80211_hw_check(&sdata->local->hw, HAS_RATE_CONTROL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) if (sta && test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) ista = &sta->sta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) priv_sta = sta->rate_ctrl_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) if (ista) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) spin_lock_bh(&sta->rate_ctrl_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) ref->ops->get_rate(ref->priv, ista, priv_sta, txrc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) spin_unlock_bh(&sta->rate_ctrl_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) rate_control_send_low(NULL, txrc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) if (ieee80211_hw_check(&sdata->local->hw, SUPPORTS_RC_TABLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) ieee80211_get_tx_rates(&sdata->vif, ista, txrc->skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) info->control.rates,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) ARRAY_SIZE(info->control.rates));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) int rate_control_set_rates(struct ieee80211_hw *hw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) struct ieee80211_sta *pubsta,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) struct ieee80211_sta_rates *rates)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) struct ieee80211_sta_rates *old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) struct ieee80211_supported_band *sband;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) sband = ieee80211_get_sband(sta->sdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) if (!sband)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) rate_control_apply_mask_ratetbl(sta, sband, rates);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) * mac80211 guarantees that this function will not be called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) * concurrently, so the following RCU access is safe, even without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) * extra locking. This can not be checked easily, so we just set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) * the condition to true.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) old = rcu_dereference_protected(pubsta->rates, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) rcu_assign_pointer(pubsta->rates, rates);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) if (old)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) kfree_rcu(old, rcu_head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) if (sta->uploaded)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) drv_sta_rate_tbl_update(hw_to_local(hw), sta->sdata, pubsta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) ieee80211_sta_set_expected_throughput(pubsta, sta_get_expected_throughput(sta));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) EXPORT_SYMBOL(rate_control_set_rates);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) struct rate_control_ref *ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) if (local->open_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) if (WARN_ON(!local->ops->set_rts_threshold))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) ref = rate_control_alloc(name, local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) if (!ref) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) wiphy_warn(local->hw.wiphy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) "Failed to select rate control algorithm\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) WARN_ON(local->rate_ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) local->rate_ctrl = ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) wiphy_debug(local->hw.wiphy, "Selected rate control algorithm '%s'\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) ref->ops->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) void rate_control_deinitialize(struct ieee80211_local *local)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) struct rate_control_ref *ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) ref = local->rate_ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) if (!ref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) local->rate_ctrl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) rate_control_free(local, ref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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