X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=drivers%2Fnet%2Figc%2Figc_ethdev.h;h=b3473b5b16464e4610f701c24b1621655b546139;hb=1bb4a528c41f;hp=7b6c209df3b6fdd9abb57a84605ba630cca3b78e;hpb=24f1955d1ecd13a3c261a328c72932115732825e;p=dpdk.git

diff --git a/drivers/net/igc/igc_ethdev.h b/drivers/net/igc/igc_ethdev.h
index 7b6c209df3..b3473b5b16 100644
--- a/drivers/net/igc/igc_ethdev.h
+++ b/drivers/net/igc/igc_ethdev.h
@@ -35,6 +35,13 @@ extern "C" {
 #define IGC_HKEY_REG_SIZE		IGC_DEFAULT_REG_SIZE
 #define IGC_HKEY_SIZE			(IGC_HKEY_REG_SIZE * IGC_HKEY_MAX_INDEX)
 
+/*
+ * The overhead from MTU to max frame size.
+ * Considering VLAN so tag needs to be counted.
+ */
+#define IGC_ETH_OVERHEAD		(RTE_ETHER_HDR_LEN + \
+					RTE_ETHER_CRC_LEN + VLAN_TAG_SIZE * 2)
+
 /*
  * TDBA/RDBA should be aligned on 16 byte boundary. But TDLEN/RDLEN should be
  * multiple of 128 bytes. So we align TDBA/RDBA on 128 byte boundary.