gve: gve_rx_copy: Move padding to an argument

Future use cases will have a different padding value.
Signed-off-by: Bailey Forrest <bcf@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Catherine Sullivan <csully@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/google/gve/gve_rx.c

@@ -350,7 +350,7 @@ gve_rx_qpl(struct device *dev, struct net_device *netdev,
 			gve_rx_flip_buff(page_info, &data_slot->qpl_offset);
 		}
 	} else {
-		skb = gve_rx_copy(netdev, napi, page_info, len);
+		skb = gve_rx_copy(netdev, napi, page_info, len, GVE_RX_PAD);
 		if (skb) {
 			u64_stats_update_begin(&rx->statss);
 			rx->rx_copied_pkt++;
@@ -392,7 +392,7 @@ static bool gve_rx(struct gve_rx_ring *rx, struct gve_rx_desc *rx_desc,
 
 	if (len <= priv->rx_copybreak) {
 		/* Just copy small packets */
-		skb = gve_rx_copy(dev, napi, page_info, len);
+		skb = gve_rx_copy(dev, napi, page_info, len, GVE_RX_PAD);
 		u64_stats_update_begin(&rx->statss);
 		rx->rx_copied_pkt++;
 		rx->rx_copybreak_pkt++;

drivers/net/ethernet/google/gve/gve_utils.c

@@ -45,10 +45,11 @@ void gve_rx_add_to_block(struct gve_priv *priv, int queue_idx)
 }
 
 struct sk_buff *gve_rx_copy(struct net_device *dev, struct napi_struct *napi,
-			    struct gve_rx_slot_page_info *page_info, u16 len)
+			    struct gve_rx_slot_page_info *page_info, u16 len,
+			    u16 pad)
 {
 	struct sk_buff *skb = napi_alloc_skb(napi, len);
-	void *va = page_info->page_address + GVE_RX_PAD +
+	void *va = page_info->page_address + pad +
 		   (page_info->page_offset ? PAGE_SIZE / 2 : 0);
 
 	if (unlikely(!skb))

drivers/net/ethernet/google/gve/gve_utils.h

@@ -18,7 +18,8 @@ void gve_rx_remove_from_block(struct gve_priv *priv, int queue_idx);
 void gve_rx_add_to_block(struct gve_priv *priv, int queue_idx);
 
 struct sk_buff *gve_rx_copy(struct net_device *dev, struct napi_struct *napi,
-			    struct gve_rx_slot_page_info *page_info, u16 len);
+			    struct gve_rx_slot_page_info *page_info, u16 len,
+			    u16 pad);
 
 #endif /* _GVE_UTILS_H */