gve: Move some static functions to a common file

These functions will be shared by the GQI and DQO variants of the GVNIC
driver as of follow-up patches in this series.
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/Makefile

 # Makefile for the Google virtual Ethernet (gve) driver
 
 obj-$(CONFIG_GVE) += gve.o
-gve-objs := gve_main.o gve_tx.o gve_rx.o gve_ethtool.o gve_adminq.o
+gve-objs := gve_main.o gve_tx.o gve_rx.o gve_ethtool.o gve_adminq.o gve_utils.o

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

 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 /* Google virtual Ethernet (gve) driver
  *
- * Copyright (C) 2015-2019 Google, Inc.
+ * Copyright (C) 2015-2021 Google, Inc.
  */
 
 #include "gve.h"
 #include "gve_adminq.h"
+#include "gve_utils.h"
 #include <linux/etherdevice.h>
 
-static void gve_rx_remove_from_block(struct gve_priv *priv, int queue_idx)
-{
-	struct gve_notify_block *block =
-			&priv->ntfy_blocks[gve_rx_idx_to_ntfy(priv, queue_idx)];
-
-	block->rx = NULL;
-}
-
 static void gve_rx_free_buffer(struct device *dev,
 			       struct gve_rx_slot_page_info *page_info,
 			       union gve_rx_data_slot *data_slot)
@@ -137,16 +130,6 @@ static int gve_prefill_rx_pages(struct gve_rx_ring *rx)
 	return err;
 }
 
-static void gve_rx_add_to_block(struct gve_priv *priv, int queue_idx)
-{
-	u32 ntfy_idx = gve_rx_idx_to_ntfy(priv, queue_idx);
-	struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
-	struct gve_rx_ring *rx = &priv->rx[queue_idx];
-
-	block->rx = rx;
-	rx->ntfy_id = ntfy_idx;
-}
-
 static int gve_rx_alloc_ring(struct gve_priv *priv, int idx)
 {
 	struct gve_rx_ring *rx = &priv->rx[idx];
@@ -279,27 +262,6 @@ static enum pkt_hash_types gve_rss_type(__be16 pkt_flags)
 	return PKT_HASH_TYPE_L2;
 }
 
-static 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 sk_buff *skb = napi_alloc_skb(napi, len);
-	void *va = page_info->page_address + GVE_RX_PAD +
-		   (page_info->page_offset ? PAGE_SIZE / 2 : 0);
-
-	if (unlikely(!skb))
-		return NULL;
-
-	__skb_put(skb, len);
-
-	skb_copy_to_linear_data(skb, va, len);
-
-	skb->protocol = eth_type_trans(skb, dev);
-
-	return skb;
-}
-
 static struct sk_buff *gve_rx_add_frags(struct napi_struct *napi,
 					struct gve_rx_slot_page_info *page_info,
 					u16 len)

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

 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 /* Google virtual Ethernet (gve) driver
  *
- * Copyright (C) 2015-2019 Google, Inc.
+ * Copyright (C) 2015-2021 Google, Inc.
  */
 
 #include "gve.h"
 #include "gve_adminq.h"
+#include "gve_utils.h"
 #include <linux/ip.h>
 #include <linux/tcp.h>
 #include <linux/vmalloc.h>
@@ -131,14 +132,6 @@ static void gve_tx_free_fifo(struct gve_tx_fifo *fifo, size_t bytes)
 	atomic_add(bytes, &fifo->available);
 }
 
-static void gve_tx_remove_from_block(struct gve_priv *priv, int queue_idx)
-{
-	struct gve_notify_block *block =
-			&priv->ntfy_blocks[gve_tx_idx_to_ntfy(priv, queue_idx)];
-
-	block->tx = NULL;
-}
-
 static int gve_clean_tx_done(struct gve_priv *priv, struct gve_tx_ring *tx,
 			     u32 to_do, bool try_to_wake);
 
@@ -174,16 +167,6 @@ static void gve_tx_free_ring(struct gve_priv *priv, int idx)
 	netif_dbg(priv, drv, priv->dev, "freed tx queue %d\n", idx);
 }
 
-static void gve_tx_add_to_block(struct gve_priv *priv, int queue_idx)
-{
-	int ntfy_idx = gve_tx_idx_to_ntfy(priv, queue_idx);
-	struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
-	struct gve_tx_ring *tx = &priv->tx[queue_idx];
-
-	block->tx = tx;
-	tx->ntfy_id = ntfy_idx;
-}
-
 static int gve_tx_alloc_ring(struct gve_priv *priv, int idx)
 {
 	struct gve_tx_ring *tx = &priv->tx[idx];

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

+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/* Google virtual Ethernet (gve) driver
+ *
+ * Copyright (C) 2015-2021 Google, Inc.
+ */
+
+#include "gve.h"
+#include "gve_adminq.h"
+#include "gve_utils.h"
+
+void gve_tx_remove_from_block(struct gve_priv *priv, int queue_idx)
+{
+	struct gve_notify_block *block =
+			&priv->ntfy_blocks[gve_tx_idx_to_ntfy(priv, queue_idx)];
+
+	block->tx = NULL;
+}
+
+void gve_tx_add_to_block(struct gve_priv *priv, int queue_idx)
+{
+	int ntfy_idx = gve_tx_idx_to_ntfy(priv, queue_idx);
+	struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
+	struct gve_tx_ring *tx = &priv->tx[queue_idx];
+
+	block->tx = tx;
+	tx->ntfy_id = ntfy_idx;
+}
+
+void gve_rx_remove_from_block(struct gve_priv *priv, int queue_idx)
+{
+	struct gve_notify_block *block =
+			&priv->ntfy_blocks[gve_rx_idx_to_ntfy(priv, queue_idx)];
+
+	block->rx = NULL;
+}
+
+void gve_rx_add_to_block(struct gve_priv *priv, int queue_idx)
+{
+	u32 ntfy_idx = gve_rx_idx_to_ntfy(priv, queue_idx);
+	struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
+	struct gve_rx_ring *rx = &priv->rx[queue_idx];
+
+	block->rx = rx;
+	rx->ntfy_id = ntfy_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 sk_buff *skb = napi_alloc_skb(napi, len);
+	void *va = page_info->page_address + GVE_RX_PAD +
+		   (page_info->page_offset ? PAGE_SIZE / 2 : 0);
+
+	if (unlikely(!skb))
+		return NULL;
+
+	__skb_put(skb, len);
+
+	skb_copy_to_linear_data(skb, va, len);
+
+	skb->protocol = eth_type_trans(skb, dev);
+
+	return skb;
+}
+

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

+/* SPDX-License-Identifier: (GPL-2.0 OR MIT)
+ * Google virtual Ethernet (gve) driver
+ *
+ * Copyright (C) 2015-2021 Google, Inc.
+ */
+
+#ifndef _GVE_UTILS_H
+#define _GVE_UTILS_H
+
+#include <linux/etherdevice.h>
+
+#include "gve.h"
+
+void gve_tx_remove_from_block(struct gve_priv *priv, int queue_idx);
+void gve_tx_add_to_block(struct gve_priv *priv, int queue_idx);
+
+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);
+
+#endif /* _GVE_UTILS_H */
+