[PATCH 04/13] ath10k: maintain peer_id for each sta and vif

[Michal Kazior]

The 10.4.3 firmware with congestion control
guarantees that each peer has only a single
peer_id mapping.

The 1:1 mapping isn't the case for older firmwares
(e.g. 10.4.1, 10.2, 10.1) but it should not
matter. This 1:1 mapping is going to be only used
by future code which inherently (flow-wise) is for
10.4.3.

Signed-off-by: Michal Kazior <michal.kazior at tieto.com>
---
 drivers/net/wireless/ath/ath10k/core.h |  2 ++
 drivers/net/wireless/ath/ath10k/mac.c  | 38 ++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 822e3195533a..4b19c71bf6a5 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -309,6 +309,7 @@ struct ath10k_sta {
 	u32 bw;
 	u32 nss;
 	u32 smps;
+	u16 peer_id;
 
 	struct work_struct update_wk;
 
@@ -330,6 +331,7 @@ struct ath10k_vif {
 	struct list_head list;
 
 	u32 vdev_id;
+	u16 peer_id;
 	enum wmi_vdev_type vdev_type;
 	enum wmi_vdev_subtype vdev_subtype;
 	u32 beacon_interval;
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 212c840e1599..ec4fae8dcb92 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -4411,6 +4411,7 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
 {
 	struct ath10k *ar = hw->priv;
 	struct ath10k_vif *arvif = ath10k_vif_to_arvif(vif);
+	struct ath10k_peer *peer;
 	enum wmi_sta_powersave_param param;
 	int ret = 0;
 	u32 value;
@@ -4605,6 +4606,24 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
 				    arvif->vdev_id, ret);
 			goto err_vdev_delete;
 		}
+
+		spin_lock_bh(&ar->data_lock);
+
+		peer = ath10k_peer_find(ar, arvif->vdev_id, vif->addr);
+		if (!peer) {
+			ath10k_warn(ar, "failed to lookup peer %pM on vdev %i\n",
+				    vif->addr, arvif->vdev_id);
+			spin_unlock_bh(&ar->data_lock);
+			ret = -ENOENT;
+			goto err_peer_delete;
+		}
+
+		arvif->peer_id = find_first_bit(peer->peer_ids,
+						ATH10K_MAX_NUM_PEER_IDS);
+
+		spin_unlock_bh(&ar->data_lock);
+	} else {
+		arvif->peer_id = HTT_INVALID_PEERID;
 	}
 
 	if (arvif->vdev_type == WMI_VDEV_TYPE_AP) {
@@ -5486,6 +5505,7 @@ static int ath10k_sta_state(struct ieee80211_hw *hw,
 	struct ath10k *ar = hw->priv;
 	struct ath10k_vif *arvif = ath10k_vif_to_arvif(vif);
 	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
+	struct ath10k_peer *peer;
 	int ret = 0;
 
 	if (old_state == IEEE80211_STA_NOTEXIST &&
@@ -5536,6 +5556,24 @@ static int ath10k_sta_state(struct ieee80211_hw *hw,
 			goto exit;
 		}
 
+		spin_lock_bh(&ar->data_lock);
+
+		peer = ath10k_peer_find(ar, arvif->vdev_id, sta->addr);
+		if (!peer) {
+			ath10k_warn(ar, "failed to lookup peer %pM on vdev %i\n",
+				    vif->addr, arvif->vdev_id);
+			spin_unlock_bh(&ar->data_lock);
+			ath10k_peer_delete(ar, arvif->vdev_id, sta->addr);
+			ath10k_mac_dec_num_stations(arvif, sta);
+			ret = -ENOENT;
+			goto exit;
+		}
+
+		arsta->peer_id = find_first_bit(peer->peer_ids,
+						ATH10K_MAX_NUM_PEER_IDS);
+
+		spin_unlock_bh(&ar->data_lock);
+
 		if (!sta->tdls)
 			goto exit;
 
-- 
2.1.4