enic: Update driver to use __dev_uc/mc_sync/unsync calls

This change updates the enic driver to make use of __dev_uc_sync and
__dev_mc_sync calls.  Previously the driver was doing its own list
management by storing the mc_addr and uc_addr list in a 32 address array.
With this change the sync data is stored in the netdev_addr_list structures
and instead we just track how many addresses we have written to the device.
When we encounter 32 we stop and print a message as occurred previously with
the old approach.

Other than the core change the only other bit needed was to propagate the
constant attribute with the MAC address as there were several spots where
is twas only passed as a u8 * instead of a const u8 *.

This patch is meant to maintain the original functionality without the use
of the mc_addr and uc_addr arrays.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 73 insertions, 118 deletions

diff --git a/drivers/net/ethernet/cisco/enic/enic.h b/drivers/net/ethernet/cisco/enic/enic.h
index f23ef321606c..14f465f239d6 100644
--- a/drivers/net/ethernet/cisco/enic/enic.h
+++ b/drivers/net/ethernet/cisco/enic/enic.h
@@ -114,8 +114,6 @@ struct enic {
 	u32 msg_enable;
 	spinlock_t devcmd_lock;
 	u8 mac_addr[ETH_ALEN];
-	u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
-	u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
 	unsigned int flags;
 	unsigned int priv_flags;
 	unsigned int mc_count;
diff --git a/drivers/net/ethernet/cisco/enic/enic_dev.c b/drivers/net/ethernet/cisco/enic/enic_dev.c
index 4b6e5695b263..3e27df522847 100644
--- a/drivers/net/ethernet/cisco/enic/enic_dev.c
+++ b/drivers/net/ethernet/cisco/enic/enic_dev.c
@@ -88,7 +88,7 @@ int enic_dev_packet_filter(struct enic *enic, int directed, int multicast,
 	return err;
 }
 
-int enic_dev_add_addr(struct enic *enic, u8 *addr)
+int enic_dev_add_addr(struct enic *enic, const u8 *addr)
 {
 	int err;
 
@@ -99,7 +99,7 @@ int enic_dev_add_addr(struct enic *enic, u8 *addr)
 	return err;
 }
 
-int enic_dev_del_addr(struct enic *enic, u8 *addr)
+int enic_dev_del_addr(struct enic *enic, const u8 *addr)
 {
 	int err;
 
diff --git a/drivers/net/ethernet/cisco/enic/enic_dev.h b/drivers/net/ethernet/cisco/enic/enic_dev.h
index 129b14a4efb0..36ea1ab25f6a 100644
--- a/drivers/net/ethernet/cisco/enic/enic_dev.h
+++ b/drivers/net/ethernet/cisco/enic/enic_dev.h
@@ -45,8 +45,8 @@ int enic_dev_add_station_addr(struct enic *enic);
 int enic_dev_del_station_addr(struct enic *enic);
 int enic_dev_packet_filter(struct enic *enic, int directed, int multicast,
 	int broadcast, int promisc, int allmulti);
-int enic_dev_add_addr(struct enic *enic, u8 *addr);
-int enic_dev_del_addr(struct enic *enic, u8 *addr);
+int enic_dev_add_addr(struct enic *enic, const u8 *addr);
+int enic_dev_del_addr(struct enic *enic, const u8 *addr);
 int enic_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid);
 int enic_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid);
 int enic_dev_notify_unset(struct enic *enic);
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index d5a220d5bad1..f32f828b7f3d 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -616,8 +616,71 @@ static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
 	return net_stats;
 }
 
+static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr)
+{
+	struct enic *enic = netdev_priv(netdev);
+
+	if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) {
+		unsigned int mc_count = netdev_mc_count(netdev);
+
+		netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n",
+			    ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
+
+		return -ENOSPC;
+	}
+
+	enic_dev_add_addr(enic, mc_addr);
+	enic->mc_count++;
+
+	return 0;
+}
+
+static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr)
+{
+	struct enic *enic = netdev_priv(netdev);
+
+	enic_dev_del_addr(enic, mc_addr);
+	enic->mc_count--;
+
+	return 0;
+}
+
+static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr)
+{
+	struct enic *enic = netdev_priv(netdev);
+
+	if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) {
+		unsigned int uc_count = netdev_uc_count(netdev);
+
+		netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n",
+			    ENIC_UNICAST_PERFECT_FILTERS, uc_count);
+
+		return -ENOSPC;
+	}
+
+	enic_dev_add_addr(enic, uc_addr);
+	enic->uc_count++;
+
+	return 0;
+}
+
+static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr)
+{
+	struct enic *enic = netdev_priv(netdev);
+
+	enic_dev_del_addr(enic, uc_addr);
+	enic->uc_count--;
+
+	return 0;
+}
+
 void enic_reset_addr_lists(struct enic *enic)
 {
+	struct net_device *netdev = enic->netdev;
+
+	__dev_uc_unsync(netdev, NULL);
+	__dev_mc_unsync(netdev, NULL);
+
 	enic->mc_count = 0;
 	enic->uc_count = 0;
 	enic->flags = 0;
@@ -684,112 +747,6 @@ static int enic_set_mac_address(struct net_device *netdev, void *p)
 	return enic_dev_add_station_addr(enic);
 }
 
-static void enic_update_multicast_addr_list(struct enic *enic)
-{
-	struct net_device *netdev = enic->netdev;
-	struct netdev_hw_addr *ha;
-	unsigned int mc_count = netdev_mc_count(netdev);
-	u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
-	unsigned int i, j;
-
-	if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
-		netdev_warn(netdev, "Registering only %d out of %d "
-			"multicast addresses\n",
-			ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
-		mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
-	}
-
-	/* Is there an easier way?  Trying to minimize to
-	 * calls to add/del multicast addrs.  We keep the
-	 * addrs from the last call in enic->mc_addr and
-	 * look for changes to add/del.
-	 */
-
-	i = 0;
-	netdev_for_each_mc_addr(ha, netdev) {
-		if (i == mc_count)
-			break;
-		memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
-	}
-
-	for (i = 0; i < enic->mc_count; i++) {
-		for (j = 0; j < mc_count; j++)
-			if (ether_addr_equal(enic->mc_addr[i], mc_addr[j]))
-				break;
-		if (j == mc_count)
-			enic_dev_del_addr(enic, enic->mc_addr[i]);
-	}
-
-	for (i = 0; i < mc_count; i++) {
-		for (j = 0; j < enic->mc_count; j++)
-			if (ether_addr_equal(mc_addr[i], enic->mc_addr[j]))
-				break;
-		if (j == enic->mc_count)
-			enic_dev_add_addr(enic, mc_addr[i]);
-	}
-
-	/* Save the list to compare against next time
-	 */
-
-	for (i = 0; i < mc_count; i++)
-		memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
-
-	enic->mc_count = mc_count;
-}
-
-static void enic_update_unicast_addr_list(struct enic *enic)
-{
-	struct net_device *netdev = enic->netdev;
-	struct netdev_hw_addr *ha;
-	unsigned int uc_count = netdev_uc_count(netdev);
-	u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
-	unsigned int i, j;
-
-	if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
-		netdev_warn(netdev, "Registering only %d out of %d "
-			"unicast addresses\n",
-			ENIC_UNICAST_PERFECT_FILTERS, uc_count);
-		uc_count = ENIC_UNICAST_PERFECT_FILTERS;
-	}
-
-	/* Is there an easier way?  Trying to minimize to
-	 * calls to add/del unicast addrs.  We keep the
-	 * addrs from the last call in enic->uc_addr and
-	 * look for changes to add/del.
-	 */
-
-	i = 0;
-	netdev_for_each_uc_addr(ha, netdev) {
-		if (i == uc_count)
-			break;
-		memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
-	}
-
-	for (i = 0; i < enic->uc_count; i++) {
-		for (j = 0; j < uc_count; j++)
-			if (ether_addr_equal(enic->uc_addr[i], uc_addr[j]))
-				break;
-		if (j == uc_count)
-			enic_dev_del_addr(enic, enic->uc_addr[i]);
-	}
-
-	for (i = 0; i < uc_count; i++) {
-		for (j = 0; j < enic->uc_count; j++)
-			if (ether_addr_equal(uc_addr[i], enic->uc_addr[j]))
-				break;
-		if (j == enic->uc_count)
-			enic_dev_add_addr(enic, uc_addr[i]);
-	}
-
-	/* Save the list to compare against next time
-	 */
-
-	for (i = 0; i < uc_count; i++)
-		memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
-
-	enic->uc_count = uc_count;
-}
-
 /* netif_tx_lock held, BHs disabled */
 static void enic_set_rx_mode(struct net_device *netdev)
 {
@@ -812,9 +769,9 @@ static void enic_set_rx_mode(struct net_device *netdev)
 	}
 
 	if (!promisc) {
-		enic_update_unicast_addr_list(enic);
+		__dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync);
 		if (!allmulti)
-			enic_update_multicast_addr_list(enic);
+			__dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync);
 	}
 }
 
diff --git a/drivers/net/ethernet/cisco/enic/vnic_dev.c b/drivers/net/ethernet/cisco/enic/vnic_dev.c
index 69dd92598b7e..e86a45cb9e68 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_dev.c
+++ b/drivers/net/ethernet/cisco/enic/vnic_dev.c
@@ -657,7 +657,7 @@ int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 	return err;
 }
 
-int vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
+int vnic_dev_add_addr(struct vnic_dev *vdev, const u8 *addr)
 {
 	u64 a0 = 0, a1 = 0;
 	int wait = 1000;
@@ -674,7 +674,7 @@ int vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
 	return err;
 }
 
-int vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
+int vnic_dev_del_addr(struct vnic_dev *vdev, const u8 *addr)
 {
 	u64 a0 = 0, a1 = 0;
 	int wait = 1000;
diff --git a/drivers/net/ethernet/cisco/enic/vnic_dev.h b/drivers/net/ethernet/cisco/enic/vnic_dev.h
index e670029862a1..1f3b301f8225 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_dev.h
+++ b/drivers/net/ethernet/cisco/enic/vnic_dev.h
@@ -95,8 +95,8 @@ int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats);
 int vnic_dev_hang_notify(struct vnic_dev *vdev);
 int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 	int broadcast, int promisc, int allmulti);
-int vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr);
-int vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr);
+int vnic_dev_add_addr(struct vnic_dev *vdev, const u8 *addr);
+int vnic_dev_del_addr(struct vnic_dev *vdev, const u8 *addr);
 int vnic_dev_get_mac_addr(struct vnic_dev *vdev, u8 *mac_addr);
 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr);
 int vnic_dev_notify_unset(struct vnic_dev *vdev);