mt76: add an intermediate struct for rx status information

Preparation for passing in more internal rx data via skb->cb

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/mediatek/mt76/mac80211.c

@@ -384,10 +384,37 @@ int mt76_get_survey(struct ieee80211_hw *hw, int idx,
 }
 EXPORT_SYMBOL_GPL(mt76_get_survey);
 
+static void
+mt76_rx_convert(struct sk_buff *skb)
+{
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	struct mt76_rx_status mstat;
+
+	mstat = *((struct mt76_rx_status *) skb->cb);
+	memset(status, 0, sizeof(*status));
+
+	status->flag = mstat.flag;
+	status->freq = mstat.freq;
+	status->enc_flags = mstat.enc_flags;
+	status->encoding = mstat.encoding;
+	status->bw = mstat.bw;
+	status->rate_idx = mstat.rate_idx;
+	status->nss = mstat.nss;
+	status->band = mstat.band;
+	status->signal = mstat.signal;
+	status->chains = mstat.chains;
+
+	BUILD_BUG_ON(sizeof(mstat) > sizeof(skb->cb));
+	BUILD_BUG_ON(sizeof(status->chain_signal) != sizeof(mstat.chain_signal));
+	memcpy(status->chain_signal, mstat.chain_signal, sizeof(mstat.chain_signal));
+}
+
 void mt76_rx_complete(struct mt76_dev *dev, enum mt76_rxq_id q)
 {
 	struct sk_buff *skb;
 
-	while ((skb = __skb_dequeue(&dev->rx_skb[q])) != NULL)
+	while ((skb = __skb_dequeue(&dev->rx_skb[q])) != NULL) {
+		mt76_rx_convert(skb);
 		ieee80211_rx_napi(dev->hw, NULL, skb, &dev->napi[q]);
+	}
 }

drivers/net/wireless/mediatek/mt76/mt76.h

@@ -250,6 +250,19 @@ struct mt76_rate_power {
 	};
 };
 
+struct mt76_rx_status {
+	u32 flag;
+	u16 freq;
+	u8 enc_flags;
+	u8 encoding:2, bw:3;
+	u8 rate_idx;
+	u8 nss;
+	u8 band;
+	u8 signal;
+	u8 chains;
+	s8 chain_signal[IEEE80211_MAX_CHAINS];
+};
+
 #define mt76_rr(dev, ...)	(dev)->mt76.bus->rr(&((dev)->mt76), __VA_ARGS__)
 #define mt76_wr(dev, ...)	(dev)->mt76.bus->wr(&((dev)->mt76), __VA_ARGS__)
 #define mt76_rmw(dev, ...)	(dev)->mt76.bus->rmw(&((dev)->mt76), __VA_ARGS__)

drivers/net/wireless/mediatek/mt76/mt76x2_mac.c

@@ -29,7 +29,7 @@ void mt76x2_mac_set_bssid(struct mt76x2_dev *dev, u8 idx, const u8 *addr)
 }
 
 static int
-mt76x2_mac_process_rate(struct ieee80211_rx_status *status, u16 rate)
+mt76x2_mac_process_rate(struct mt76_rx_status *status, u16 rate)
 {
 	u8 idx = FIELD_GET(MT_RXWI_RATE_INDEX, rate);
 
@@ -268,7 +268,7 @@ static void mt76x2_remove_hdr_pad(struct sk_buff *skb)
 int mt76x2_mac_process_rx(struct mt76x2_dev *dev, struct sk_buff *skb,
 			  void *rxi)
 {
-	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	struct mt76_rx_status *status = (struct mt76_rx_status *) skb->cb;
 	struct mt76x2_rxwi *rxwi = rxi;
 	u32 ctl = le32_to_cpu(rxwi->ctl);
 	u16 rate = le16_to_cpu(rxwi->rate);