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wifi: iwlwifi: mvm: MLO scan upon channel condition degradation

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This will allow to prevent disconnections.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20241028135215.6402718fbc94.Ia6ce651cc7c96f7aaeee449737dd28ed291788a6@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Emmanuel Grumbach 2024-10-28 13:54:50 +02:00 committed by Johannes Berg
parent 4635e6eaa0
commit dc40fde446
4 changed files with 15 additions and 2 deletions
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1
drivers/net/wireless/intel/iwlwifi/mvm/constants.h
View File

@ -19,6 +19,7 @@
#define IWL_MVM_BCN_LOSS_EXIT_ESR_THRESH_2_LINKS 5
#define IWL_MVM_BCN_LOSS_EXIT_ESR_THRESH 15
#define IWL_MVM_BCN_LOSS_EXIT_ESR_THRESH_BSS_PARAM_CHANGED 11
#define IWL_MVM_LOW_RSSI_MLO_SCAN_THRESH -72
#define IWL_MVM_DEFAULT_PS_TX_DATA_TIMEOUT (100 * USEC_PER_MSEC)
#define IWL_MVM_DEFAULT_PS_RX_DATA_TIMEOUT (100 * USEC_PER_MSEC)

3
drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
View File

@ -1691,6 +1691,9 @@ iwl_mvm_handle_missed_beacons_notif(struct iwl_mvm *mvm,
ieee80211_beacon_loss(vif);
else
ieee80211_cqm_beacon_loss_notify(vif, GFP_ATOMIC);
/* try to switch links, no-op if we don't have MLO */
iwl_mvm_int_mlo_scan(mvm, vif);
}
iwl_dbg_tlv_time_point(&mvm->fwrt,

10
drivers/net/wireless/intel/iwlwifi/mvm/rx.c
View File

@ -560,7 +560,8 @@ static void iwl_mvm_update_link_sig(struct ieee80211_vif *vif, int sig,
struct iwl_mvm_vif_link_info *link_info,
struct ieee80211_bss_conf *bss_conf)
{
struct iwl_mvm *mvm = iwl_mvm_vif_from_mac80211(vif)->mvm;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm *mvm = mvmvif->mvm;
int thold = bss_conf->cqm_rssi_thold;
int hyst = bss_conf->cqm_rssi_hyst;
int last_event;
@ -625,6 +626,13 @@ static void iwl_mvm_update_link_sig(struct ieee80211_vif *vif, int sig,
if (!vif->cfg.assoc || !ieee80211_vif_is_mld(vif))
return;
/* We're not in EMLSR and our signal is bad, try to switch link maybe */
if (sig < IWL_MVM_LOW_RSSI_MLO_SCAN_THRESH && !mvmvif->esr_active) {
iwl_mvm_int_mlo_scan(mvm, vif);
return;
}
/* We are in EMLSR, check if we need to exit */
exit_esr_thresh =
iwl_mvm_get_esr_rssi_thresh(mvm,
&bss_conf->chanreq.oper,

3
drivers/net/wireless/intel/iwlwifi/mvm/scan.c
View File

@ -3597,7 +3597,8 @@ static int iwl_mvm_int_mlo_scan_start(struct iwl_mvm *mvm,
IWL_DEBUG_SCAN(mvm, "Starting Internal MLO scan: n_channels=%zu\n",
n_channels);
if (!vif->cfg.assoc || !ieee80211_vif_is_mld(vif))
if (!vif->cfg.assoc || !ieee80211_vif_is_mld(vif) ||
hweight16(vif->valid_links) == 1)
return -EINVAL;
size = struct_size(req, channels, n_channels);