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wifi: mac80211: start and finalize channel switch on link basis

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Add changes to start a channel switch as well as finalize it on link basis
in order to support CSA with MLO as well.

Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Link: https://msgid.link/20240130140918.1172387-5-quic_adisi@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Aditya Kumar Singh 2024-01-30 19:39:17 +05:30 committed by Johannes Berg
parent a3a637a6c0
commit 1a96bb4e8a
2 changed files with 37 additions and 24 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

59
net/mac80211/cfg.c
View file

@ -3633,6 +3633,7 @@ static int __ieee80211_csa_finalize(struct ieee80211_link_data *link_data)
{
struct ieee80211_sub_if_data *sdata = link_data->sdata;
struct ieee80211_local *local = sdata->local;
struct ieee80211_bss_conf *link_conf = link_data->conf;
u64 changed = 0;
int err;
@ -3654,16 +3655,16 @@ static int __ieee80211_csa_finalize(struct ieee80211_link_data *link_data)
if (link_data->reserved_ready)
return 0;
return ieee80211_link_use_reserved_context(&sdata->deflink);
return ieee80211_link_use_reserved_context(link_data);
}
if (!cfg80211_chandef_identical(&link_data->conf->chanreq.oper,
if (!cfg80211_chandef_identical(&link_conf->chanreq.oper,
&link_data->csa_chanreq.oper))
return -EINVAL;
sdata->vif.bss_conf.csa_active = false;
link_conf->csa_active = false;
err = ieee80211_set_after_csa_beacon(&sdata->deflink, &changed);
err = ieee80211_set_after_csa_beacon(link_data, &changed);
if (err)
return err;
@ -3690,7 +3691,8 @@ static void ieee80211_csa_finalize(struct ieee80211_link_data *link_data)
struct ieee80211_sub_if_data *sdata = link_data->sdata;
if (__ieee80211_csa_finalize(link_data)) {
sdata_info(sdata, "failed to finalize CSA, disconnecting\n");
sdata_info(sdata, "failed to finalize CSA on link %d, disconnecting\n",
link_data->link_id);
cfg80211_stop_iface(sdata->local->hw.wiphy, &sdata->wdev,
GFP_KERNEL);
}
@ -3867,7 +3869,10 @@ __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
struct ieee80211_channel_switch ch_switch;
struct ieee80211_chanctx_conf *conf;
struct ieee80211_chanctx *chanctx;
struct ieee80211_bss_conf *link_conf;
struct ieee80211_link_data *link_data;
u64 changed = 0;
u8 link_id = params->link_id;
int err;
lockdep_assert_wiphy(local->hw.wiphy);
@ -3878,15 +3883,23 @@ __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
if (sdata->wdev.cac_started)
return -EBUSY;
if (chanreq.oper.punctured && !sdata->vif.bss_conf.eht_support)
if (WARN_ON(link_id >= IEEE80211_MLD_MAX_NUM_LINKS))
return -EINVAL;
link_data = wiphy_dereference(wiphy, sdata->link[link_id]);
if (!link_data)
return -ENOLINK;
link_conf = link_data->conf;
if (chanreq.oper.punctured && !link_conf->eht_support)
return -EINVAL;
/* don't allow another channel switch if one is already active. */
if (sdata->vif.bss_conf.csa_active)
if (link_conf->csa_active)
return -EBUSY;
conf = rcu_dereference_protected(sdata->vif.bss_conf.chanctx_conf,
lockdep_is_held(&local->hw.wiphy->mtx));
conf = wiphy_dereference(wiphy, link_conf->chanctx_conf);
if (!conf) {
err = -EBUSY;
goto out;
@ -3910,7 +3923,7 @@ __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
if (err)
goto out;
err = ieee80211_link_reserve_chanctx(&sdata->deflink, &chanreq,
err = ieee80211_link_reserve_chanctx(link_data, &chanreq,
chanctx->mode,
params->radar_required);
if (err)
@ -3919,40 +3932,38 @@ __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
/* if reservation is invalid then this will fail */
err = ieee80211_check_combinations(sdata, NULL, chanctx->mode, 0);
if (err) {
ieee80211_link_unreserve_chanctx(&sdata->deflink);
ieee80211_link_unreserve_chanctx(link_data);
goto out;
}
/* if there is a color change in progress, abort it */
if (sdata->vif.bss_conf.color_change_active)
if (link_conf->color_change_active)
ieee80211_color_change_abort(sdata);
err = ieee80211_set_csa_beacon(&sdata->deflink, params, &changed);
err = ieee80211_set_csa_beacon(link_data, params, &changed);
if (err) {
ieee80211_link_unreserve_chanctx(&sdata->deflink);
ieee80211_link_unreserve_chanctx(link_data);
goto out;
}
sdata->deflink.csa_chanreq = chanreq;
sdata->deflink.csa_block_tx = params->block_tx;
sdata->vif.bss_conf.csa_active = true;
link_data->csa_chanreq = chanreq;
link_data->csa_block_tx = params->block_tx;
link_conf->csa_active = true;
if (sdata->deflink.csa_block_tx)
if (link_data->csa_block_tx)
ieee80211_stop_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
cfg80211_ch_switch_started_notify(sdata->dev,
&sdata->deflink.csa_chanreq.oper, 0,
&link_data->csa_chanreq.oper, 0,
params->count, params->block_tx);
if (changed) {
ieee80211_link_info_change_notify(sdata, &sdata->deflink,
changed);
drv_channel_switch_beacon(sdata,
&sdata->deflink.csa_chanreq.oper);
ieee80211_link_info_change_notify(sdata, link_data, changed);
drv_channel_switch_beacon(sdata, &link_data->csa_chanreq.oper);
} else {
/* if the beacon didn't change, we can finalize immediately */
ieee80211_csa_finalize(&sdata->deflink);
ieee80211_csa_finalize(link_data);
}
out:

2
net/mac80211/link.c
View file

@ -73,6 +73,8 @@ void ieee80211_link_stop(struct ieee80211_link_data *link)
ieee80211_mgd_stop_link(link);
cancel_delayed_work_sync(&link->color_collision_detect_work);
wiphy_work_cancel(link->sdata->local->hw.wiphy,
&link->csa_finalize_work);
ieee80211_link_release_channel(link);
}