1 files changed, 35 insertions, 0 deletions

diff --git a/drivers/net/igb/e1000_mac.c b/drivers/net/igb/e1000_mac.c
index 60343b58364d..46e27e98254a 100644
--- a/drivers/net/igb/e1000_mac.c
+++ b/drivers/net/igb/e1000_mac.c
@@ -261,6 +261,41 @@ void igb_mta_set(struct e1000_hw *hw, u32 hash_value)
 }
 
 /**
+ *  igb_update_mc_addr_list - Update Multicast addresses
+ *  @hw: pointer to the HW structure
+ *  @mc_addr_list: array of multicast addresses to program
+ *  @mc_addr_count: number of multicast addresses to program
+ *
+ *  Updates entire Multicast Table Array.
+ *  The caller must have a packed mc_addr_list of multicast addresses.
+ **/
+void igb_update_mc_addr_list(struct e1000_hw *hw,
+                             u8 *mc_addr_list, u32 mc_addr_count)
+{
+        u32 hash_value, hash_bit, hash_reg;
+        int i;
+
+        /* clear mta_shadow */
+        memset(&hw->mac.mta_shadow, 0, sizeof(hw->mac.mta_shadow));
+
+        /* update mta_shadow from mc_addr_list */
+        for (i = 0; (u32) i < mc_addr_count; i++) {
+                hash_value = igb_hash_mc_addr(hw, mc_addr_list);
+
+                hash_reg = (hash_value >> 5) & (hw->mac.mta_reg_count - 1);
+                hash_bit = hash_value & 0x1F;
+
+                hw->mac.mta_shadow[hash_reg] |= (1 << hash_bit);
+                mc_addr_list += (ETH_ALEN);
+        }
+
+        /* replace the entire MTA table */
+        for (i = hw->mac.mta_reg_count - 1; i >= 0; i--)
+                array_wr32(E1000_MTA, i, hw->mac.mta_shadow[i]);
+        wrfl();
+}
+
+/**
  *  igb_hash_mc_addr - Generate a multicast hash value
  *  @hw: pointer to the HW structure
  *  @mc_addr: pointer to a multicast address