igb: Remove static qualifiers

Remove static qualifiers on the following functions to be able to call
from XSK specific file that is added in the later patches:
- igb_xdp_tx_queue_mapping()
- igb_xdp_ring_update_tail()
- igb_clean_tx_ring()
- igb_clean_rx_ring()
- igb_xdp_xmit_back()
- igb_process_skb_fields()

While at it, inline igb_xdp_tx_queue_mapping() and
igb_xdp_ring_update_tail(). These functions are small enough and used in
XDP hot paths.

Signed-off-by: Sriram Yagnaraman <sriram.yagnaraman@est.tech>
[Kurt: Split patches, inline small XDP functions]
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Tested-by: George Kuruvinakunnel <george.kuruvinakunnel@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Link: https://patch.msgid.link/20250106221929.956999-2-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 6 insertions, 31 deletions

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 288a4bb2683a..77a6d1470f8b 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -33,7 +33,6 @@
 #include <linux/bpf_trace.h>
 #include <linux/pm_runtime.h>
 #include <linux/etherdevice.h>
-#include <linux/lockdep.h>
 #ifdef CONFIG_IGB_DCA
 #include <linux/dca.h>
 #endif
@@ -116,8 +115,6 @@ static void igb_configure_tx(struct igb_adapter *);
 static void igb_configure_rx(struct igb_adapter *);
 static void igb_clean_all_tx_rings(struct igb_adapter *);
 static void igb_clean_all_rx_rings(struct igb_adapter *);
-static void igb_clean_tx_ring(struct igb_ring *);
-static void igb_clean_rx_ring(struct igb_ring *);
 static void igb_set_rx_mode(struct net_device *);
 static void igb_update_phy_info(struct timer_list *);
 static void igb_watchdog(struct timer_list *);
@@ -2919,29 +2916,7 @@ static int igb_xdp(struct net_device *dev, struct netdev_bpf *xdp)
 	}
 }
 
-/* This function assumes __netif_tx_lock is held by the caller. */
-static void igb_xdp_ring_update_tail(struct igb_ring *ring)
-{
-	lockdep_assert_held(&txring_txq(ring)->_xmit_lock);
-
-	/* Force memory writes to complete before letting h/w know there
-	 * are new descriptors to fetch.
-	 */
-	wmb();
-	writel(ring->next_to_use, ring->tail);
-}
-
-static struct igb_ring *igb_xdp_tx_queue_mapping(struct igb_adapter *adapter)
-{
-	unsigned int r_idx = smp_processor_id();
-
-	if (r_idx >= adapter->num_tx_queues)
-		r_idx = r_idx % adapter->num_tx_queues;
-
-	return adapter->tx_ring[r_idx];
-}
-
-static int igb_xdp_xmit_back(struct igb_adapter *adapter, struct xdp_buff *xdp)
+int igb_xdp_xmit_back(struct igb_adapter *adapter, struct xdp_buff *xdp)
 {
 	struct xdp_frame *xdpf = xdp_convert_buff_to_frame(xdp);
 	int cpu = smp_processor_id();
@@ -4888,7 +4863,7 @@ static void igb_free_all_tx_resources(struct igb_adapter *adapter)
  *  igb_clean_tx_ring - Free Tx Buffers
  *  @tx_ring: ring to be cleaned
  **/
-static void igb_clean_tx_ring(struct igb_ring *tx_ring)
+void igb_clean_tx_ring(struct igb_ring *tx_ring)
 {
 	u16 i = tx_ring->next_to_clean;
 	struct igb_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i];
@@ -5007,7 +4982,7 @@ static void igb_free_all_rx_resources(struct igb_adapter *adapter)
  *  igb_clean_rx_ring - Free Rx Buffers per Queue
  *  @rx_ring: ring to free buffers from
  **/
-static void igb_clean_rx_ring(struct igb_ring *rx_ring)
+void igb_clean_rx_ring(struct igb_ring *rx_ring)
 {
 	u16 i = rx_ring->next_to_clean;
 
@@ -8786,9 +8761,9 @@ static bool igb_cleanup_headers(struct igb_ring *rx_ring,
  *  order to populate the hash, checksum, VLAN, timestamp, protocol, and
  *  other fields within the skb.
  **/
-static void igb_process_skb_fields(struct igb_ring *rx_ring,
-				   union e1000_adv_rx_desc *rx_desc,
-				   struct sk_buff *skb)
+void igb_process_skb_fields(struct igb_ring *rx_ring,
+			    union e1000_adv_rx_desc *rx_desc,
+			    struct sk_buff *skb)
 {
 	struct net_device *dev = rx_ring->netdev;