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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2013-2014, 2018-2019, 2022-2023 Intel Corporation
* Copyright (C) 2013-2014 Intel Mobile Communications GmbH
*/
#include "mvm.h"
/* For counting bound interfaces */
struct iwl_mvm_active_iface_iterator_data {
struct ieee80211_vif *ignore_vif;
struct ieee80211_sta *sta_vif_ap_sta;
enum iwl_sf_state sta_vif_state;
u32 num_active_macs;
};
/*
* Count bound interfaces which are not p2p, besides data->ignore_vif.
* data->station_vif will point to one bound vif of type station, if exists.
*/
static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mvm_active_iface_iterator_data *data = _data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (vif == data->ignore_vif || !mvmvif->deflink.phy_ctxt ||
vif->type == NL80211_IFTYPE_P2P_DEVICE)
return;
data->num_active_macs++;
if (vif->type == NL80211_IFTYPE_STATION) {
data->sta_vif_ap_sta = mvmvif->ap_sta;
if (vif->cfg.assoc)
data->sta_vif_state = SF_FULL_ON;
else
data->sta_vif_state = SF_INIT_OFF;
}
}
/*
* Aging and idle timeouts for the different possible scenarios
* in default configuration
*/
static const
__le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
{
cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF),
cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF)
},
{
cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF),
cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF)
},
{
cpu_to_le32(SF_MCAST_AGING_TIMER_DEF),
cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF)
},
{
cpu_to_le32(SF_BA_AGING_TIMER_DEF),
cpu_to_le32(SF_BA_IDLE_TIMER_DEF)
},
{
cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF),
cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF)
},
};
/*
* Aging and idle timeouts for the different possible scenarios
* in single BSS MAC configuration.
*/
static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
{
cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER),
cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER)
},
{
cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER),
cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER)
},
{
cpu_to_le32(SF_MCAST_AGING_TIMER),
cpu_to_le32(SF_MCAST_IDLE_TIMER)
},
{
cpu_to_le32(SF_BA_AGING_TIMER),
cpu_to_le32(SF_BA_IDLE_TIMER)
},
{
cpu_to_le32(SF_TX_RE_AGING_TIMER),
cpu_to_le32(SF_TX_RE_IDLE_TIMER)
},
};
static void iwl_mvm_fill_sf_command(struct iwl_mvm *mvm,
struct iwl_sf_cfg_cmd *sf_cmd,
struct ieee80211_sta *sta)
{
int i, j, watermark;
u8 max_rx_nss = 0;
bool is_legacy = true;
struct ieee80211_link_sta *link_sta;
unsigned int link_id;
sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN);
/*
* If we are in association flow - check antenna configuration
* capabilities of the AP station, and choose the watermark accordingly.
*/
if (sta) {
/* find the maximal NSS number among all links (if relevant) */
rcu_read_lock();
for (link_id = 0; link_id < ARRAY_SIZE(sta->link); link_id++) {
link_sta = rcu_dereference(sta->link[link_id]);
if (!link_sta)
continue;
if (link_sta->ht_cap.ht_supported ||
link_sta->vht_cap.vht_supported ||
link_sta->eht_cap.has_eht ||
link_sta->he_cap.has_he) {
is_legacy = false;
max_rx_nss = max(max_rx_nss, link_sta->rx_nss);
}
}
rcu_read_unlock();
if (!is_legacy) {
switch (max_rx_nss) {
case 1:
watermark = SF_W_MARK_SISO;
break;
case 2:
watermark = SF_W_MARK_MIMO2;
break;
default:
watermark = SF_W_MARK_MIMO3;
break;
}
} else {
watermark = SF_W_MARK_LEGACY;
}
/* default watermark value for unassociated mode. */
} else {
watermark = SF_W_MARK_MIMO2;
}
sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
for (i = 0; i < SF_NUM_SCENARIO; i++) {
for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
sf_cmd->long_delay_timeouts[i][j] =
cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
}
}
if (sta) {
BUILD_BUG_ON(sizeof(sf_full_timeout) !=
sizeof(__le32) * SF_NUM_SCENARIO *
SF_NUM_TIMEOUT_TYPES);
memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
sizeof(sf_full_timeout));
} else {
BUILD_BUG_ON(sizeof(sf_full_timeout_def) !=
sizeof(__le32) * SF_NUM_SCENARIO *
SF_NUM_TIMEOUT_TYPES);
memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def,
sizeof(sf_full_timeout_def));
}
}
static int iwl_mvm_sf_config(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
enum iwl_sf_state new_state)
{
struct iwl_sf_cfg_cmd sf_cmd = {
.state = cpu_to_le32(new_state),
};
int ret = 0;
/*
* If an associated AP sta changed its antenna configuration, the state
* will remain FULL_ON but SF parameters need to be reconsidered.
*/
if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
return 0;
switch (new_state) {
case SF_UNINIT:
iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
break;
case SF_FULL_ON:
if (!sta) {
IWL_ERR(mvm,
"No station: Cannot switch SF to FULL_ON\n");
return -EINVAL;
}
iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta);
break;
case SF_INIT_OFF:
iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
break;
default:
WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
new_state);
return -EINVAL;
}
ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
sizeof(sf_cmd), &sf_cmd);
if (!ret)
mvm->sf_state = new_state;
return ret;
}
/*
* Update Smart fifo:
* Count bound interfaces that are not to be removed, ignoring p2p devices,
* and set new state accordingly.
*/
int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
bool remove_vif)
{
enum iwl_sf_state new_state;
struct iwl_mvm_vif *mvmvif = NULL;
struct iwl_mvm_active_iface_iterator_data data = {
.ignore_vif = changed_vif,
.sta_vif_state = SF_UNINIT,
};
struct ieee80211_sta *sta = NULL;
/*
* Ignore the call if we are in HW Restart flow, or if the handled
* vif is a p2p device.
*/
if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
(changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
return 0;
ieee80211_iterate_active_interfaces_atomic(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_bound_iface_iterator,
&data);
/* If changed_vif exists and is not to be removed, add to the count */
if (changed_vif && !remove_vif)
data.num_active_macs++;
switch (data.num_active_macs) {
case 0:
/* If there are no active macs - change state to SF_INIT_OFF */
new_state = SF_INIT_OFF;
break;
case 1:
if (remove_vif) {
/* The one active mac left is of type station
* and we filled the relevant data during iteration
*/
new_state = data.sta_vif_state;
sta = data.sta_vif_ap_sta;
} else {
if (WARN_ON(!changed_vif))
return -EINVAL;
if (changed_vif->type != NL80211_IFTYPE_STATION) {
new_state = SF_UNINIT;
} else if (changed_vif->cfg.assoc &&
changed_vif->bss_conf.dtim_period) {
mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
sta = mvmvif->ap_sta;
new_state = SF_FULL_ON;
} else {
new_state = SF_INIT_OFF;
}
}
break;
default:
/* If there are multiple active macs - change to SF_UNINIT */
new_state = SF_UNINIT;
}
return iwl_mvm_sf_config(mvm, sta, new_state);
}
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