New common code can be used, eliminating driver code.

Signed-off-by: Stephen Hemminger <shemming@brocade.com>

--- a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c	2014-05-14 11:26:30.381274255 -0700
+++ b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c	2014-05-14 11:37:51.319893900 -0700
@@ -56,7 +56,6 @@
 #include <rte_alarm.h>
 #include <rte_ether.h>
 #include <rte_ethdev.h>
-#include <rte_atomic.h>
 #include <rte_malloc.h>
 
 #include "ixgbe_logs.h"
@@ -325,58 +324,6 @@ static struct eth_dev_ops ixgbevf_eth_de
 	.tx_queue_release     = ixgbe_dev_tx_queue_release,
 };
 
-/**
- * Atomically reads the link status information from global
- * structure rte_eth_dev.
- *
- * @param dev
- *   - Pointer to the structure rte_eth_dev to read from.
- *   - Pointer to the buffer to be saved with the link status.
- *
- * @return
- *   - On success, zero.
- *   - On failure, negative value.
- */
-static inline int
-rte_ixgbe_dev_atomic_read_link_status(struct rte_eth_dev *dev,
-				struct rte_eth_link *link)
-{
-	struct rte_eth_link *dst = link;
-	struct rte_eth_link *src = &(dev->data->dev_link);
-
-	if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
-					*(uint64_t *)src) == 0)
-		return -1;
-
-	return 0;
-}
-
-/**
- * Atomically writes the link status information into global
- * structure rte_eth_dev.
- *
- * @param dev
- *   - Pointer to the structure rte_eth_dev to read from.
- *   - Pointer to the buffer to be saved with the link status.
- *
- * @return
- *   - On success, zero.
- *   - On failure, negative value.
- */
-static inline int
-rte_ixgbe_dev_atomic_write_link_status(struct rte_eth_dev *dev,
-				struct rte_eth_link *link)
-{
-	struct rte_eth_link *dst = &(dev->data->dev_link);
-	struct rte_eth_link *src = link;
-
-	if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
-					*(uint64_t *)src) == 0)
-		return -1;
-
-	return 0;
-}
-
 /*
  * This function is the same as ixgbe_is_sfp() in ixgbe/ixgbe.h.
  */
@@ -1453,7 +1400,7 @@ ixgbe_dev_stop(struct rte_eth_dev *dev)
 
 	/* Clear recorded link status */
 	memset(&link, 0, sizeof(link));
-	rte_ixgbe_dev_atomic_write_link_status(dev, &link);
+	rte_eth_dev_set_link(dev, &link);
 }
 
 /*
@@ -1764,11 +1711,8 @@ ixgbe_dev_link_update(struct rte_eth_dev
 	int link_up;
 	int diag;
 
-	link.link_status = 0;
-	link.link_speed = 0;
-	link.link_duplex = 0;
-	memset(&old, 0, sizeof(old));
-	rte_ixgbe_dev_atomic_read_link_status(dev, &old);
+	memset(&link, 0, sizeof(link));
+	rte_eth_dev_get_link(dev, &old);
 
 	/* check if it needs to wait to complete, if lsc interrupt is enabled */
 	if (wait_to_complete == 0 || dev->data->dev_conf.intr_conf.lsc != 0)
@@ -1778,14 +1722,14 @@ ixgbe_dev_link_update(struct rte_eth_dev
 	if (diag != 0) {
 		link.link_speed = ETH_LINK_SPEED_100;
 		link.link_duplex = ETH_LINK_HALF_DUPLEX;
-		rte_ixgbe_dev_atomic_write_link_status(dev, &link);
+		rte_eth_dev_set_link(dev, &link);
 		if (link.link_status == old.link_status)
 			return -1;
 		return 0;
 	}
 
 	if (link_up == 0) {
-		rte_ixgbe_dev_atomic_write_link_status(dev, &link);
+		rte_eth_dev_set_link(dev, &link);
 		if (link.link_status == old.link_status)
 			return -1;
 		return 0;
@@ -1812,7 +1756,7 @@ ixgbe_dev_link_update(struct rte_eth_dev
 		link.link_speed = ETH_LINK_SPEED_10000;
 		break;
 	}
-	rte_ixgbe_dev_atomic_write_link_status(dev, &link);
+	rte_eth_dev_set_link(dev, &link);
 
 	if (link.link_status == old.link_status)
 		return -1;
@@ -1946,8 +1890,7 @@ ixgbe_dev_link_status_print(struct rte_e
 {
 	struct rte_eth_link link;
 
-	memset(&link, 0, sizeof(link));
-	rte_ixgbe_dev_atomic_read_link_status(dev, &link);
+	rte_eth_dev_get_link(dev, &link);
 	if (link.link_status) {
 		PMD_INIT_LOG(INFO, "Port %d: Link Up - speed %u Mbps - %s",
 					(int)(dev->data->port_id),
@@ -1993,8 +1936,7 @@ ixgbe_dev_interrupt_action(struct rte_et
 
 	if (intr->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
 		/* get the link status before link update, for predicting later */
-		memset(&link, 0, sizeof(link));
-		rte_ixgbe_dev_atomic_read_link_status(dev, &link);
+		rte_eth_dev_get_link(dev, &link);
 
 		ixgbe_dev_link_update(dev, 0);