[PATCH 6/8] wifi: ath12k: modify chanctx iterators for MLO

[Kalle Valo]

From: Rameshkumar Sundaram <quic_ramess at quicinc.com>

Currently ath12k's chanctx iterator functions use deflink of given ahvif and
bss_conf of corresponding vif to make sure the iterator returns intended vif.
An ML vif can have multiple affiliated links each having its own channel
context, hence iterate through the links of the given ahvif and use the link
objects (arvif and link_conf) to make sure the chan ctx iterator returns
intended link of the given vif.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: Rameshkumar Sundaram <quic_ramess at quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo at quicinc.com>
---
 drivers/net/wireless/ath/ath12k/mac.c | 80 +++++++++++++++++++--------
 1 file changed, 56 insertions(+), 24 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index 01932aeab4f3..956d43520510 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -8309,19 +8309,32 @@ ath12k_mac_change_chanctx_cnt_iter(void *data, u8 *mac,
 {
 	struct ath12k_vif *ahvif = ath12k_vif_to_ahvif(vif);
 	struct ath12k_mac_change_chanctx_arg *arg = data;
+	struct ieee80211_bss_conf *link_conf;
 	struct ath12k_link_vif *arvif;
+	unsigned long links_map;
+	u8 link_id;
 
 	lockdep_assert_wiphy(ahvif->ah->hw->wiphy);
 
-	arvif = &ahvif->deflink;
+	links_map = ahvif->links_map;
+	for_each_set_bit(link_id, &links_map, IEEE80211_MLD_MAX_NUM_LINKS) {
+		arvif = wiphy_dereference(ahvif->ah->hw->wiphy, ahvif->link[link_id]);
+		if (WARN_ON(!arvif))
+			continue;
 
-	if (arvif->ar != arg->ar)
-		return;
+		if (arvif->ar != arg->ar)
+			continue;
 
-	if (rcu_access_pointer(vif->bss_conf.chanctx_conf) != arg->ctx)
-		return;
+		link_conf = wiphy_dereference(ahvif->ah->hw->wiphy,
+					      vif->link_conf[link_id]);
+		if (WARN_ON(!link_conf))
+			continue;
 
-	arg->n_vifs++;
+		if (rcu_access_pointer(link_conf->chanctx_conf) != arg->ctx)
+			continue;
+
+		arg->n_vifs++;
+	}
 }
 
 static void
@@ -8330,27 +8343,41 @@ ath12k_mac_change_chanctx_fill_iter(void *data, u8 *mac,
 {
 	struct ath12k_vif *ahvif = ath12k_vif_to_ahvif(vif);
 	struct ath12k_mac_change_chanctx_arg *arg = data;
+	struct ieee80211_bss_conf *link_conf;
 	struct ieee80211_chanctx_conf *ctx;
 	struct ath12k_link_vif *arvif;
+	unsigned long links_map;
+	u8 link_id;
 
 	lockdep_assert_wiphy(ahvif->ah->hw->wiphy);
 
-	arvif = &ahvif->deflink;
+	links_map = ahvif->links_map;
+	for_each_set_bit(link_id, &links_map, IEEE80211_MLD_MAX_NUM_LINKS) {
+		arvif = wiphy_dereference(ahvif->ah->hw->wiphy, ahvif->link[link_id]);
+		if (WARN_ON(!arvif))
+			continue;
 
-	if (arvif->ar != arg->ar)
-		return;
+		if (arvif->ar != arg->ar)
+			continue;
 
-	ctx = rcu_access_pointer(vif->bss_conf.chanctx_conf);
-	if (ctx != arg->ctx)
-		return;
+		link_conf = wiphy_dereference(ahvif->ah->hw->wiphy,
+					      vif->link_conf[arvif->link_id]);
+		if (WARN_ON(!link_conf))
+			continue;
 
-	if (WARN_ON(arg->next_vif == arg->n_vifs))
-		return;
+		ctx = rcu_access_pointer(link_conf->chanctx_conf);
+		if (ctx != arg->ctx)
+			continue;
 
-	arg->vifs[arg->next_vif].vif = vif;
-	arg->vifs[arg->next_vif].old_ctx = ctx;
-	arg->vifs[arg->next_vif].new_ctx = ctx;
-	arg->next_vif++;
+		if (WARN_ON(arg->next_vif == arg->n_vifs))
+			return;
+
+		arg->vifs[arg->next_vif].vif = vif;
+		arg->vifs[arg->next_vif].old_ctx = ctx;
+		arg->vifs[arg->next_vif].new_ctx = ctx;
+		arg->vifs[arg->next_vif].link_conf = link_conf;
+		arg->next_vif++;
+	}
 }
 
 static u32 ath12k_mac_nlwidth_to_wmiwidth(enum nl80211_chan_width width)
@@ -8410,10 +8437,12 @@ ath12k_mac_update_vif_chan(struct ath12k *ar,
 			   int n_vifs)
 {
 	struct ath12k_wmi_vdev_up_params params = {};
+	struct ieee80211_bss_conf *link_conf;
 	struct ath12k_base *ab = ar->ab;
 	struct ath12k_link_vif *arvif;
 	struct ieee80211_vif *vif;
 	struct ath12k_vif *ahvif;
+	u8 link_id;
 	int ret;
 	int i;
 	bool monitor_vif = false;
@@ -8423,7 +8452,10 @@ ath12k_mac_update_vif_chan(struct ath12k *ar,
 	for (i = 0; i < n_vifs; i++) {
 		vif = vifs[i].vif;
 		ahvif = ath12k_vif_to_ahvif(vif);
-		arvif = &ahvif->deflink;
+		link_conf = vifs[i].link_conf;
+		link_id = link_conf->link_id;
+		arvif = wiphy_dereference(ath12k_ar_to_hw(ar)->wiphy,
+					  ahvif->link[link_id]);
 
 		if (vif->type == NL80211_IFTYPE_MONITOR)
 			monitor_vif = true;
@@ -8476,13 +8508,13 @@ ath12k_mac_update_vif_chan(struct ath12k *ar,
 		params.aid = ahvif->aid;
 		params.bssid = arvif->bssid;
 		if (vif->mbssid_tx_vif) {
-			struct ath12k_vif *ahvif =
+			struct ath12k_vif *tx_ahvif =
 				ath12k_vif_to_ahvif(vif->mbssid_tx_vif);
-			struct ath12k_link_vif *arvif = &ahvif->deflink;
+			struct ath12k_link_vif *tx_arvif = &tx_ahvif->deflink;
 
-			params.tx_bssid = arvif->bssid;
-			params.nontx_profile_idx = vif->bss_conf.bssid_index;
-			params.nontx_profile_cnt = 1 << vif->bss_conf.bssid_indicator;
+			params.tx_bssid = tx_arvif->bssid;
+			params.nontx_profile_idx = link_conf->bssid_index;
+			params.nontx_profile_cnt = 1 << link_conf->bssid_indicator;
 		}
 		ret = ath12k_wmi_vdev_up(arvif->ar, &params);
 		if (ret) {
-- 
2.39.5