igb: move all multicast addresses into multicast table array

This patch moves all of the multicast addresses out of the free Receive
address registers and instead programs them all into the multicast table
array.  As a result the multicast filtering may not be as precise, but it
also greatly reduces the overhead for multicast addresses.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/igb/e1000_hw.h b/drivers/net/igb/e1000_hw.h
index eb41f3b8234f..83f9b4f6d5e1 100644
--- a/drivers/net/igb/e1000_hw.h
+++ b/drivers/net/igb/e1000_hw.h
@@ -338,6 +338,10 @@ struct e1000_mac_info {
         u16 ifs_ratio;
         u16 ifs_step_size;
         u16 mta_reg_count;
+
+        /* Maximum size of the MTA register table in all supported adapters */
+        #define MAX_MTA_REG 128
+        u32 mta_shadow[MAX_MTA_REG];
         u16 rar_entry_count;
 
         u8  forced_speed_duplex;