ethdev: fix max Rx packet length

[dpdk.git] / drivers / net / igc / igc_ethdev.h

diff --git a/drivers/net/igc/igc_ethdev.h b/drivers/net/igc/igc_ethdev.h
index 7b6c209..b3473b5 100644 (file)
--- 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.