mac80211: prepare sta handling for MLO support

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>

3 files changed, 14 insertions, 14 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/dvm/rs.c b/drivers/net/wireless/intel/iwlwifi/dvm/rs.c
index b7c8b209bfea..baffa1cbe8fc 100644
--- a/drivers/net/wireless/intel/iwlwifi/dvm/rs.c
+++ b/drivers/net/wireless/intel/iwlwifi/dvm/rs.c
@@ -1039,7 +1039,7 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
 	lq_sta->last_rate_n_flags = tx_rate;
 done:
 	/* See if there's a better rate or modulation mode to try. */
-	if (sta && sta->supp_rates[sband->band])
+	if (sta && sta->deflink.supp_rates[sband->band])
 		rs_rate_scale_perform(priv, skb, sta, lq_sta);
 
 	if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist)
@@ -1239,7 +1239,7 @@ static int rs_switch_to_mimo2(struct iwl_priv *priv,
 	struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 	struct iwl_rxon_context *ctx = sta_priv->ctx;
 
-	if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
+	if (!conf_is_ht(conf) || !sta->deflink.ht_cap.ht_supported)
 		return -1;
 
 	if (sta->smps_mode == IEEE80211_SMPS_STATIC)
@@ -1294,7 +1294,7 @@ static int rs_switch_to_mimo3(struct iwl_priv *priv,
 	struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 	struct iwl_rxon_context *ctx = sta_priv->ctx;
 
-	if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
+	if (!conf_is_ht(conf) || !sta->deflink.ht_cap.ht_supported)
 		return -1;
 
 	if (sta->smps_mode == IEEE80211_SMPS_STATIC)
@@ -1350,7 +1350,7 @@ static int rs_switch_to_siso(struct iwl_priv *priv,
 	struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 	struct iwl_rxon_context *ctx = sta_priv->ctx;
 
-	if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
+	if (!conf_is_ht(conf) || !sta->deflink.ht_cap.ht_supported)
 		return -1;
 
 	IWL_DEBUG_RATE(priv, "LQ: try to switch to SISO\n");
@@ -1570,7 +1570,7 @@ static void rs_move_siso_to_other(struct iwl_priv *priv,
 	struct iwl_scale_tbl_info *search_tbl =
 				&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
 	struct iwl_rate_scale_data *window = &(tbl->win[index]);
-	struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
+	struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap;
 	u32 sz = (sizeof(struct iwl_scale_tbl_info) -
 		  (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
 	u8 start_action;
@@ -1740,7 +1740,7 @@ static void rs_move_mimo2_to_other(struct iwl_priv *priv,
 	struct iwl_scale_tbl_info *search_tbl =
 				&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
 	struct iwl_rate_scale_data *window = &(tbl->win[index]);
-	struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
+	struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap;
 	u32 sz = (sizeof(struct iwl_scale_tbl_info) -
 		  (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
 	u8 start_action;
@@ -1908,7 +1908,7 @@ static void rs_move_mimo3_to_other(struct iwl_priv *priv,
 	struct iwl_scale_tbl_info *search_tbl =
 				&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
 	struct iwl_rate_scale_data *window = &(tbl->win[index]);
-	struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
+	struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap;
 	u32 sz = (sizeof(struct iwl_scale_tbl_info) -
 		  (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
 	u8 start_action;
@@ -2212,7 +2212,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
 	    info->flags & IEEE80211_TX_CTL_NO_ACK)
 		return;
 
-	lq_sta->supp_rates = sta->supp_rates[lq_sta->band];
+	lq_sta->supp_rates = sta->deflink.supp_rates[lq_sta->band];
 
 	tid = rs_tl_add_packet(lq_sta, hdr);
 	if ((tid != IWL_MAX_TID_COUNT) &&
@@ -2763,7 +2763,7 @@ void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta, u8 sta_i
 	int i, j;
 	struct ieee80211_hw *hw = priv->hw;
 	struct ieee80211_conf *conf = &priv->hw->conf;
-	struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
+	struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap;
 	struct iwl_station_priv *sta_priv;
 	struct iwl_lq_sta *lq_sta;
 	struct ieee80211_supported_band *sband;
@@ -2781,7 +2781,7 @@ void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta, u8 sta_i
 			rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]);
 
 	lq_sta->flush_timer = 0;
-	lq_sta->supp_rates = sta->supp_rates[sband->band];
+	lq_sta->supp_rates = sta->deflink.supp_rates[sband->band];
 
 	IWL_DEBUG_RATE(priv, "LQ: *** rate scale station global init for station %d ***\n",
 		       sta_id);
@@ -2798,7 +2798,7 @@ void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta, u8 sta_i
 	/*
 	 * active legacy rates as per supported rates bitmap
 	 */
-	supp = sta->supp_rates[sband->band];
+	supp = sta->deflink.supp_rates[sband->band];
 	lq_sta->active_legacy_rate = 0;
 	for_each_set_bit(i, &supp, BITS_PER_LONG)
 		lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value);
diff --git a/drivers/net/wireless/intel/iwlwifi/dvm/rxon.c b/drivers/net/wireless/intel/iwlwifi/dvm/rxon.c
index 70338bc7bb54..5dd2d43a01d8 100644
--- a/drivers/net/wireless/intel/iwlwifi/dvm/rxon.c
+++ b/drivers/net/wireless/intel/iwlwifi/dvm/rxon.c
@@ -1280,7 +1280,7 @@ static void iwlagn_check_needed_chains(struct iwl_priv *priv,
 			break;
 		}
 
-		ht_cap = &sta->ht_cap;
+		ht_cap = &sta->deflink.ht_cap;
 
 		need_multiple = true;
 
diff --git a/drivers/net/wireless/intel/iwlwifi/dvm/sta.c b/drivers/net/wireless/intel/iwlwifi/dvm/sta.c
index 8f7a0f36c276..476068c0abb7 100644
--- a/drivers/net/wireless/intel/iwlwifi/dvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/dvm/sta.c
@@ -139,7 +139,7 @@ bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 	if (!sta)
 		return true;
 
-	return sta->bandwidth >= IEEE80211_STA_RX_BW_40;
+	return sta->deflink.bandwidth >= IEEE80211_STA_RX_BW_40;
 }
 
 static void iwl_sta_calc_ht_flags(struct iwl_priv *priv,
@@ -147,7 +147,7 @@ static void iwl_sta_calc_ht_flags(struct iwl_priv *priv,
 				  struct iwl_rxon_context *ctx,
 				  __le32 *flags, __le32 *mask)
 {
-	struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
+	struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->deflink.ht_cap;
 
 	*mask = STA_FLG_RTS_MIMO_PROT_MSK |
 		STA_FLG_MIMO_DIS_MSK |