[intel] Expose functionality to be shared with intelx driver

The Intel 10 Gigabit NICs have a datapath that is almost
register-compatible with the Intel 1 Gigabit NICs.  Expose common
functionality to avoid duplication of code in the new "intelx" driver.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/drivers/net/intel.c

  * @v ring		Descriptor ring
  * @ret rc		Return status code
  */
-static int intel_create_ring ( struct intel_nic *intel,
-			       struct intel_ring *ring ) {
+int intel_create_ring ( struct intel_nic *intel, struct intel_ring *ring ) {
 	physaddr_t address;
 	uint32_t dctl;
 
  * @v intel		Intel device
  * @v ring		Descriptor ring
  */
-static void intel_destroy_ring ( struct intel_nic *intel,
-				 struct intel_ring *ring ) {
+void intel_destroy_ring ( struct intel_nic *intel, struct intel_ring *ring ) {
 
 	/* Clear ring length */
 	writel ( 0, ( intel->regs + ring->reg + INTEL_xDLEN ) );
  *
  * @v intel		Intel device
  */
-static void intel_refill_rx ( struct intel_nic *intel ) {
+void intel_refill_rx ( struct intel_nic *intel ) {
 	struct intel_descriptor *rx;
 	struct io_buffer *iobuf;
 	unsigned int rx_idx;
 	}
 }
 
+/**
+ * Discard unused receive I/O buffers
+ *
+ * @v intel		Intel device
+ */
+void intel_empty_rx ( struct intel_nic *intel ) {
+	unsigned int i;
+
+	for ( i = 0 ; i < INTEL_NUM_RX_DESC ; i++ ) {
+		if ( intel->rx_iobuf[i] )
+			free_iob ( intel->rx_iobuf[i] );
+		intel->rx_iobuf[i] = NULL;
+	}
+}
+
 /**
  * Open network device
  *
  */
 static void intel_close ( struct net_device *netdev ) {
 	struct intel_nic *intel = netdev->priv;
-	unsigned int i;
 
 	/* Disable receiver */
 	writel ( 0, intel->regs + INTEL_RCTL );
 	intel_destroy_ring ( intel, &intel->rx );
 
 	/* Discard any unused receive buffers */
-	for ( i = 0 ; i < INTEL_NUM_RX_DESC ; i++ ) {
-		if ( intel->rx_iobuf[i] )
-			free_iob ( intel->rx_iobuf[i] );
-		intel->rx_iobuf[i] = NULL;
-	}
+	intel_empty_rx ( intel );
 
 	/* Destroy transmit descriptor ring */
 	intel_destroy_ring ( intel, &intel->tx );
  * @v iobuf		I/O buffer
  * @ret rc		Return status code
  */
-static int intel_transmit ( struct net_device *netdev,
-			       struct io_buffer *iobuf ) {
+int intel_transmit ( struct net_device *netdev, struct io_buffer *iobuf ) {
 	struct intel_nic *intel = netdev->priv;
 	struct intel_descriptor *tx;
 	unsigned int tx_idx;
  *
  * @v netdev		Network device
  */
-static void intel_poll_tx ( struct net_device *netdev ) {
+void intel_poll_tx ( struct net_device *netdev ) {
 	struct intel_nic *intel = netdev->priv;
 	struct intel_descriptor *tx;
 	unsigned int tx_idx;
  *
  * @v netdev		Network device
  */
-static void intel_poll_rx ( struct net_device *netdev ) {
+void intel_poll_rx ( struct net_device *netdev ) {
 	struct intel_nic *intel = netdev->priv;
 	struct intel_descriptor *rx;
 	struct io_buffer *iobuf;

src/drivers/net/intel.h

 	struct io_buffer *rx_iobuf[INTEL_NUM_RX_DESC];
 };
 
+extern int intel_create_ring ( struct intel_nic *intel,
+			       struct intel_ring *ring );
+extern void intel_destroy_ring ( struct intel_nic *intel,
+				 struct intel_ring *ring );
+extern void intel_refill_rx ( struct intel_nic *intel );
+extern void intel_empty_rx ( struct intel_nic *intel );
+extern int intel_transmit ( struct net_device *netdev,
+			    struct io_buffer *iobuf );
+extern void intel_poll_tx ( struct net_device *netdev );
+extern void intel_poll_rx ( struct net_device *netdev );
+
 #endif /* _INTEL_H */