wifi: ath12k: modify ath12k_mac_op_bss_info_changed() for MLO

Currently bss_info_changed callback (which is registered with
ath12k_mac_op_bss_info_changed()) is used to inform vif (struct ieee80211_vif) and bss
(struct ieee80211_bss_conf) level configuration changes to driver.

With MLO, vif level config as well each link config changes inside vif needs to
be updated and mac80211 uses vif_cfg_changed() and link_info_changed() callback
ops for the same, this is also backward compatible where mac80211 will update
default link conf changes in case VIF is non-MLO.

Rename ath12k_mac_op_bss_info_changed() to ath12k_mac_op_link_info_changed()
and register the same to link_info_changed callback.  Register
ath12k_mac_op_vif_cfg_changed() to vif_cfg_changed() callback and handle all
vif level configuration changes there.

Also, currently ath12k_mac_op_bss_info_changed() uses deflink to apply the
config or to cache the config based on the availability of corresponding vdev.
With MLO multiple links can be affiliated to a vif/BSS, so use the link id
provided by mac80211 to fetch the corresponding link to which the bss change
was intended.

For non-MLO link id 0 will be provided by mac80211 and deflink (which is mapped
to ahvif->links[0]) will be used.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-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: Sriram R <quic_srirrama@quicinc.com>
Co-developed-by: Rameshkumar Sundaram <quic_ramess@quicinc.com>
Signed-off-by: Rameshkumar Sundaram <quic_ramess@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://patch.msgid.link/20241015171416.518022-8-kvalo@kernel.org
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>

drivers/net/wireless/ath/ath12k/mac.c

@@ -3150,6 +3150,40 @@ static int ath12k_mac_fils_discovery(struct ath12k_link_vif *arvif,
 	return ret;
 }
 
+static void ath12k_mac_op_vif_cfg_changed(struct ieee80211_hw *hw,
+					  struct ieee80211_vif *vif,
+					  u64 changed)
+{
+	struct ath12k_vif *ahvif = ath12k_vif_to_ahvif(vif);
+	unsigned long links = ahvif->links_map;
+	struct ath12k_link_vif *arvif;
+	struct ath12k *ar;
+	u8 link_id;
+
+	lockdep_assert_wiphy(hw->wiphy);
+
+	if (changed & BSS_CHANGED_SSID && vif->type == NL80211_IFTYPE_AP) {
+		ahvif->u.ap.ssid_len = vif->cfg.ssid_len;
+		if (vif->cfg.ssid_len)
+			memcpy(ahvif->u.ap.ssid, vif->cfg.ssid, vif->cfg.ssid_len);
+	}
+
+	if (changed & BSS_CHANGED_ASSOC) {
+		for_each_set_bit(link_id, &links, IEEE80211_MLD_MAX_NUM_LINKS) {
+			arvif = wiphy_dereference(hw->wiphy, ahvif->link[link_id]);
+			if (!arvif || !arvif->ar)
+				continue;
+
+			ar = arvif->ar;
+
+			if (vif->cfg.assoc)
+				ath12k_bss_assoc(ar, arvif, &vif->bss_conf);
+			else
+				ath12k_bss_disassoc(ar, arvif);
+		}
+	}
+}
+
 static void ath12k_mac_vif_setup_ps(struct ath12k_link_vif *arvif)
 {
 	struct ath12k *ar = arvif->ar;
@@ -3497,33 +3531,27 @@ static void ath12k_ahvif_put_link_cache(struct ath12k_vif *ahvif, u8 link_id)
 	ahvif->cache[link_id] = NULL;
 }
 
-static void ath12k_mac_op_bss_info_changed(struct ieee80211_hw *hw,
-					   struct ieee80211_vif *vif,
-					   struct ieee80211_bss_conf *info,
-					   u64 changed)
+static void ath12k_mac_op_link_info_changed(struct ieee80211_hw *hw,
+					    struct ieee80211_vif *vif,
+					    struct ieee80211_bss_conf *info,
+					    u64 changed)
 {
 	struct ath12k *ar;
 	struct ath12k_vif *ahvif = ath12k_vif_to_ahvif(vif);
 	struct ath12k_vif_cache *cache;
 	struct ath12k_link_vif *arvif;
+	u8 link_id = info->link_id;
 
 	lockdep_assert_wiphy(hw->wiphy);
 
-	/* TODO use info->link_id and fetch corresponding ahvif->link[]
-	 * with MLO support.
-	 */
-	arvif = &ahvif->deflink;
-	ar = ath12k_get_ar_by_vif(hw, vif);
+	arvif = wiphy_dereference(hw->wiphy, ahvif->link[link_id]);
 
 	/* if the vdev is not created on a certain radio,
 	 * cache the info to be updated later on vdev creation
 	 */
 
-	if (!ar) {
-		/* TODO Once link vif is fetched based on link id from
-		 * info, avoid using ATH12K_DEFAULT_LINK_ID.
-		 */
-		cache = ath12k_ahvif_get_link_cache(ahvif, ATH12K_DEFAULT_LINK_ID);
+	if (!arvif || !arvif->is_created) {
+		cache = ath12k_ahvif_get_link_cache(ahvif, link_id);
 		if (!cache)
 			return;
 
@@ -3532,6 +3560,8 @@ static void ath12k_mac_op_bss_info_changed(struct ieee80211_hw *hw,
 		return;
 	}
 
+	ar = arvif->ar;
+
 	ath12k_mac_bss_info_changed(ar, arvif, info, changed);
 }
 
@@ -8888,7 +8918,8 @@ static const struct ieee80211_ops ath12k_ops = {
 	.remove_interface		= ath12k_mac_op_remove_interface,
 	.update_vif_offload		= ath12k_mac_op_update_vif_offload,
 	.config                         = ath12k_mac_op_config,
-	.bss_info_changed               = ath12k_mac_op_bss_info_changed,
+	.link_info_changed              = ath12k_mac_op_link_info_changed,
+	.vif_cfg_changed		= ath12k_mac_op_vif_cfg_changed,
 	.configure_filter		= ath12k_mac_op_configure_filter,
 	.hw_scan                        = ath12k_mac_op_hw_scan,
 	.cancel_hw_scan                 = ath12k_mac_op_cancel_hw_scan,