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From:   <sean.wang@mediatek.com>
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        <jemele@google.com>, <yenlinlai@google.com>,
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        <linux-mediatek@lists.infradead.org>
Subject: [PATCH v3 2/2] mt76: mt7921: fix sta_state incorrect implementation
Date:   Thu, 3 Jun 2021 11:02:17 +0800
Message-ID: <e0a33a31da8a69dcf13d30e2d2591329c8d33689.1622688431.git.objelf@gmail.com>
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From: Sean Wang <sean.wang@mediatek.com>

When .sta_state is implemented, mac80211 assumes that the station entry is
usable after the NOTEXIST->NONE transition.

So we should create the sta entry as early as possible in order that
mac80211 pass assoc/auth frames to mt76 with the newly created sta entry,
and add .sta_assoc to mt76 core to refresh the sta entry again when sta is
being associated.

Fixes: 8aa5a9b7361c ("mt76: mt7921: enable deep sleep at runtime")
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
v1->v2: Put back the careless change not belonged to the patch to keep
	mt7921_mcu_sta_add for BC entry and mt76_connac_mcu_uni_add_bss
	on the association.
v2->v3: 1. rebase the latest mt76
	2. squashing 2/3 to the one
	3. add the proper lock in mt7921_mac_sta_assoc
---
 .../net/wireless/mediatek/mt76/mt7921/main.c  | 55 ++++++++-----------
 .../net/wireless/mediatek/mt76/mt7921/mcu.c   | 20 +++++++
 .../wireless/mediatek/mt76/mt7921/mt7921.h    |  4 ++
 .../net/wireless/mediatek/mt76/mt7921/pci.c   |  1 +
 4 files changed, 49 insertions(+), 31 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
index c641a92b140c..af98835b5134 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
@@ -618,18 +618,14 @@ int mt7921_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 	if (ret)
 		return ret;
 
-	if (vif->type == NL80211_IFTYPE_STATION) {
+	if (vif->type == NL80211_IFTYPE_STATION)
 		mvif->wep_sta = msta;
-		if (!sta->tdls)
-			mt76_connac_mcu_uni_add_bss(&dev->mphy, vif,
-						    &mvif->sta.wcid, true);
-	}
 
 	mt7921_mac_wtbl_update(dev, idx,
 			       MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
 
 	ret = mt7921_mcu_sta_add(dev, sta, vif, true,
-				 MT76_STA_INFO_STATE_ASSOC);
+				 MT76_STA_INFO_STATE_NONE);
 	if (ret)
 		return ret;
 
@@ -638,6 +634,27 @@ int mt7921_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 	return 0;
 }
 
+void mt7921_mac_sta_assoc(struct mt76_dev *mdev, struct ieee80211_vif *vif,
+			  struct ieee80211_sta *sta)
+{
+	struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
+	struct mt7921_sta *msta = (struct mt7921_sta *)sta->drv_priv;
+	struct mt7921_vif *mvif = (struct mt7921_vif *)vif->drv_priv;
+
+	mt7921_mutex_acquire(dev);
+
+	if (vif->type == NL80211_IFTYPE_STATION && !sta->tdls)
+		mt76_connac_mcu_uni_add_bss(&dev->mphy, vif, &mvif->sta.wcid,
+					    true);
+
+	mt7921_mac_wtbl_update(dev, msta->wcid.idx,
+			       MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
+
+	mt7921_mcu_sta_update(dev, sta, vif, MT76_STA_INFO_STATE_ASSOC);
+
+	mt7921_mutex_release(dev);
+}
+
 void mt7921_mac_sta_remove(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 			   struct ieee80211_sta *sta)
 {
@@ -793,22 +810,6 @@ mt7921_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 	return ret;
 }
 
-static int
-mt7921_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
-	       struct ieee80211_sta *sta)
-{
-	return mt76_sta_state(hw, vif, sta, IEEE80211_STA_NOTEXIST,
-			      IEEE80211_STA_NONE);
-}
-
-static int
-mt7921_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
-		  struct ieee80211_sta *sta)
-{
-	return mt76_sta_state(hw, vif, sta, IEEE80211_STA_NONE,
-			      IEEE80211_STA_NOTEXIST);
-}
-
 static int mt7921_sta_state(struct ieee80211_hw *hw,
 			    struct ieee80211_vif *vif,
 			    struct ieee80211_sta *sta,
@@ -823,15 +824,7 @@ static int mt7921_sta_state(struct ieee80211_hw *hw,
 		mt7921_mutex_release(dev);
 	}
 
-	if (old_state == IEEE80211_STA_AUTH &&
-	    new_state == IEEE80211_STA_ASSOC) {
-		return mt7921_sta_add(hw, vif, sta);
-	} else if (old_state == IEEE80211_STA_ASSOC &&
-		   new_state == IEEE80211_STA_AUTH) {
-		return mt7921_sta_remove(hw, vif, sta);
-	}
-
-	return 0;
+	return mt76_sta_state(hw, vif, sta, old_state, new_state);
 }
 
 static int
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
index 4f0fd9674950..ab338bdf4f4a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
@@ -1289,6 +1289,26 @@ int mt7921_mcu_sta_add(struct mt7921_dev *dev, struct ieee80211_sta *sta,
 	return mt76_connac_mcu_add_sta_cmd(&dev->mphy, &info);
 }
 
+int mt7921_mcu_sta_update(struct mt7921_dev *dev, struct ieee80211_sta *sta,
+			  struct ieee80211_vif *vif, u8 state)
+{
+	struct mt7921_vif *mvif = (struct mt7921_vif *)vif->drv_priv;
+	int rssi = -ewma_rssi_read(&mvif->rssi);
+	struct mt76_sta_cmd_info info = {
+		.sta = sta,
+		.vif = vif,
+		.enable = true,
+		.state = state,
+		.cmd = MCU_UNI_CMD_STA_REC_UPDATE,
+		.rcpi = to_rcpi(rssi),
+	};
+	struct mt7921_sta *msta;
+
+	msta = sta ? (struct mt7921_sta *)sta->drv_priv : NULL;
+	info.wcid = msta ? &msta->wcid : &mvif->sta.wcid;
+	return mt76_connac_mcu_update_sta_cmd(&dev->mphy, &info);
+}
+
 int __mt7921_mcu_drv_pmctrl(struct mt7921_dev *dev)
 {
 	struct mt76_phy *mphy = &dev->mt76.phy;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
index d4d84b898011..196e47f89fc1 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
@@ -265,6 +265,8 @@ int mt7921_set_channel(struct mt7921_phy *phy);
 int mt7921_mcu_sta_add(struct mt7921_dev *dev, struct ieee80211_sta *sta,
 		       struct ieee80211_vif *vif, bool enable,
 		       enum mt76_sta_info_state state);
+int mt7921_mcu_sta_update(struct mt7921_dev *dev, struct ieee80211_sta *sta,
+			  struct ieee80211_vif *vif, u8 state);
 int mt7921_mcu_set_chan_info(struct mt7921_phy *phy, int cmd);
 int mt7921_mcu_set_tx(struct mt7921_dev *dev, struct ieee80211_vif *vif);
 int mt7921_mcu_set_eeprom(struct mt7921_dev *dev);
@@ -336,6 +338,8 @@ void mt7921_mac_fill_rx_vector(struct mt7921_dev *dev, struct sk_buff *skb);
 void mt7921_mac_tx_free(struct mt7921_dev *dev, struct sk_buff *skb);
 int mt7921_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 		       struct ieee80211_sta *sta);
+void mt7921_mac_sta_assoc(struct mt76_dev *mdev, struct ieee80211_vif *vif,
+			  struct ieee80211_sta *sta);
 void mt7921_mac_sta_remove(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 			   struct ieee80211_sta *sta);
 void mt7921_mac_work(struct work_struct *work);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
index 13263f50dc00..27906b2cd912 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
@@ -106,6 +106,7 @@ static int mt7921_pci_probe(struct pci_dev *pdev,
 		.rx_poll_complete = mt7921_rx_poll_complete,
 		.sta_ps = mt7921_sta_ps,
 		.sta_add = mt7921_mac_sta_add,
+		.sta_assoc = mt7921_mac_sta_assoc,
 		.sta_remove = mt7921_mac_sta_remove,
 		.update_survey = mt7921_update_channel,
 	};
-- 
2.25.1