Index: head/sys/dev/sfxge/common/efx.h
===================================================================
--- head/sys/dev/sfxge/common/efx.h
+++ head/sys/dev/sfxge/common/efx.h
@@ -1261,6 +1261,7 @@
 #define	EFX_FEATURE_FW_ASSISTED_TSO	0x00001000
 #define	EFX_FEATURE_FW_ASSISTED_TSO_V2	0x00002000
 #define	EFX_FEATURE_PACKED_STREAM	0x00004000
+#define	EFX_FEATURE_TXQ_CKSUM_OP_DESC	0x00008000
 
 typedef enum efx_tunnel_protocol_e {
 	EFX_TUNNEL_PROTOCOL_NONE = 0,
Index: head/sys/dev/sfxge/common/efx_nic.c
===================================================================
--- head/sys/dev/sfxge/common/efx_nic.c
+++ head/sys/dev/sfxge/common/efx_nic.c
@@ -257,7 +257,8 @@
 		    EFX_FEATURE_PIO_BUFFERS |
 		    EFX_FEATURE_FW_ASSISTED_TSO |
 		    EFX_FEATURE_FW_ASSISTED_TSO_V2 |
-		    EFX_FEATURE_PACKED_STREAM;
+		    EFX_FEATURE_PACKED_STREAM |
+		    EFX_FEATURE_TXQ_CKSUM_OP_DESC;
 		break;
 #endif	/* EFSYS_OPT_HUNTINGTON */
 
@@ -277,7 +278,8 @@
 		    EFX_FEATURE_MCDI_DMA |
 		    EFX_FEATURE_PIO_BUFFERS |
 		    EFX_FEATURE_FW_ASSISTED_TSO_V2 |
-		    EFX_FEATURE_PACKED_STREAM;
+		    EFX_FEATURE_PACKED_STREAM |
+		    EFX_FEATURE_TXQ_CKSUM_OP_DESC;
 		break;
 #endif	/* EFSYS_OPT_MEDFORD */
 
@@ -293,7 +295,8 @@
 		    EFX_FEATURE_MCDI_DMA |
 		    EFX_FEATURE_PIO_BUFFERS |
 		    EFX_FEATURE_FW_ASSISTED_TSO_V2 |
-		    EFX_FEATURE_PACKED_STREAM;
+		    EFX_FEATURE_PACKED_STREAM |
+		    EFX_FEATURE_TXQ_CKSUM_OP_DESC;
 		break;
 #endif	/* EFSYS_OPT_MEDFORD2 */