mt76: make number of tokens configurable dynamically

Preparation for adding Wireless Ethernet Dispatch support
Signed-off-by: Felix Fietkau <nbd@nbd.name>

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

@@ -580,6 +580,7 @@ mt76_alloc_device(struct device *pdev, unsigned int size,
 	INIT_LIST_HEAD(&dev->wcid_list);
 
 	INIT_LIST_HEAD(&dev->txwi_cache);
+	dev->token_size = dev->drv->token_size;
 
 	for (i = 0; i < ARRAY_SIZE(dev->q_rx); i++)
 		skb_queue_head_init(&dev->rx_skb[i]);

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

@@ -719,7 +719,8 @@ struct mt76_dev {
 
 	spinlock_t token_lock;
 	struct idr token;
-	int token_count;
+	u16 token_count;
+	u16 token_size;
 
 	wait_queue_head_t tx_wait;
 	/* spinclock used to protect wcid pktid linked list */
@@ -1381,8 +1382,7 @@ mt76_token_get(struct mt76_dev *dev, struct mt76_txwi_cache **ptxwi)
 	int token;
 
 	spin_lock_bh(&dev->token_lock);
-	token = idr_alloc(&dev->token, *ptxwi, 0, dev->drv->token_size,
-			  GFP_ATOMIC);
+	token = idr_alloc(&dev->token, *ptxwi, 0, dev->token_size, GFP_ATOMIC);
 	spin_unlock_bh(&dev->token_lock);
 
 	return token;

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

@@ -722,12 +722,11 @@ int mt76_token_consume(struct mt76_dev *dev, struct mt76_txwi_cache **ptxwi)
 
 	spin_lock_bh(&dev->token_lock);
 
-	token = idr_alloc(&dev->token, *ptxwi, 0, dev->drv->token_size,
-			  GFP_ATOMIC);
+	token = idr_alloc(&dev->token, *ptxwi, 0, dev->token_size, GFP_ATOMIC);
 	if (token >= 0)
 		dev->token_count++;
 
-	if (dev->token_count >= dev->drv->token_size - MT76_TOKEN_FREE_THR)
+	if (dev->token_count >= dev->token_size - MT76_TOKEN_FREE_THR)
 		__mt76_set_tx_blocked(dev, true);
 
 	spin_unlock_bh(&dev->token_lock);
@@ -747,7 +746,7 @@ mt76_token_release(struct mt76_dev *dev, int token, bool *wake)
 	if (txwi)
 		dev->token_count--;
 
-	if (dev->token_count < dev->drv->token_size - MT76_TOKEN_FREE_THR &&
+	if (dev->token_count < dev->token_size - MT76_TOKEN_FREE_THR &&
 	    dev->phy.q_tx[0]->blocked)
 		*wake = true;