Index: head/sys/dev/sfxge/common/ef10_impl.h
===================================================================
--- head/sys/dev/sfxge/common/ef10_impl.h
+++ head/sys/dev/sfxge/common/ef10_impl.h
@@ -993,13 +993,15 @@
 ef10_rx_qenable(
 	__in		efx_rxq_t *erp);
 
+union efx_rxq_type_data_u;
+
 extern	__checkReturn	efx_rc_t
 ef10_rx_qcreate(
 	__in		efx_nic_t *enp,
 	__in		unsigned int index,
 	__in		unsigned int label,
 	__in		efx_rxq_type_t type,
-	__in		uint32_t type_data,
+	__in		const union efx_rxq_type_data_u *type_data,
 	__in		efsys_mem_t *esmp,
 	__in		size_t ndescs,
 	__in		uint32_t id,
Index: head/sys/dev/sfxge/common/ef10_rx.c
===================================================================
--- head/sys/dev/sfxge/common/ef10_rx.c
+++ head/sys/dev/sfxge/common/ef10_rx.c
@@ -1027,7 +1027,7 @@
 	__in		unsigned int index,
 	__in		unsigned int label,
 	__in		efx_rxq_type_t type,
-	__in		uint32_t type_data,
+	__in		const efx_rxq_type_data_t *type_data,
 	__in		efsys_mem_t *esmp,
 	__in		size_t ndescs,
 	__in		uint32_t id,
@@ -1066,7 +1066,7 @@
 		break;
 #if EFSYS_OPT_RX_PACKED_STREAM
 	case EFX_RXQ_TYPE_PACKED_STREAM:
-		switch (type_data) {
+		switch (type_data->ertd_packed_stream.eps_buf_size) {
 		case EFX_RXQ_PACKED_STREAM_BUF_SIZE_1M:
 			ps_buf_size = MC_CMD_INIT_RXQ_EXT_IN_PS_BUFF_1M;
 			break;
Index: head/sys/dev/sfxge/common/efx_impl.h
===================================================================
--- head/sys/dev/sfxge/common/efx_impl.h
+++ head/sys/dev/sfxge/common/efx_impl.h
@@ -157,6 +157,16 @@
 #endif
 } efx_tx_ops_t;
 
+typedef union efx_rxq_type_data_u {
+	/* Dummy member to have non-empty union if no options are enabled */
+	uint32_t	ertd_dummy;
+#if EFSYS_OPT_RX_PACKED_STREAM
+	struct {
+		uint32_t	eps_buf_size;
+	} ertd_packed_stream;
+#endif
+} efx_rxq_type_data_t;
+
 typedef struct efx_rx_ops_s {
 	efx_rc_t	(*erxo_init)(efx_nic_t *);
 	void		(*erxo_fini)(efx_nic_t *);
@@ -193,7 +203,8 @@
 	efx_rc_t	(*erxo_qflush)(efx_rxq_t *);
 	void		(*erxo_qenable)(efx_rxq_t *);
 	efx_rc_t	(*erxo_qcreate)(efx_nic_t *enp, unsigned int,
-					unsigned int, efx_rxq_type_t, uint32_t,
+					unsigned int, efx_rxq_type_t,
+					const efx_rxq_type_data_t *,
 					efsys_mem_t *, size_t, uint32_t,
 					unsigned int,
 					efx_evq_t *, efx_rxq_t *);
Index: head/sys/dev/sfxge/common/efx_rx.c
===================================================================
--- head/sys/dev/sfxge/common/efx_rx.c
+++ head/sys/dev/sfxge/common/efx_rx.c
@@ -136,7 +136,7 @@
 	__in		unsigned int index,
 	__in		unsigned int label,
 	__in		efx_rxq_type_t type,
-	__in		uint32_t type_data,
+	__in		const efx_rxq_type_data_t *type_data,
 	__in		efsys_mem_t *esmp,
 	__in		size_t ndescs,
 	__in		uint32_t id,
@@ -780,7 +780,7 @@
 	__in		unsigned int index,
 	__in		unsigned int label,
 	__in		efx_rxq_type_t type,
-	__in		uint32_t type_data,
+	__in		const efx_rxq_type_data_t *type_data,
 	__in		efsys_mem_t *esmp,
 	__in		size_t ndescs,
 	__in		uint32_t id,
@@ -841,8 +841,8 @@
 	__in		efx_evq_t *eep,
 	__deref_out	efx_rxq_t **erpp)
 {
-	return efx_rx_qcreate_internal(enp, index, label, type, 0, esmp, ndescs,
-	    id, flags, eep, erpp);
+	return efx_rx_qcreate_internal(enp, index, label, type, NULL,
+	    esmp, ndescs, id, flags, eep, erpp);
 }
 
 #if EFSYS_OPT_RX_PACKED_STREAM
@@ -858,8 +858,14 @@
 	__in		efx_evq_t *eep,
 	__deref_out	efx_rxq_t **erpp)
 {
+	efx_rxq_type_data_t type_data;
+
+	memset(&type_data, 0, sizeof (type_data));
+
+	type_data.ertd_packed_stream.eps_buf_size = ps_buf_size;
+
 	return efx_rx_qcreate_internal(enp, index, label,
-	    EFX_RXQ_TYPE_PACKED_STREAM, ps_buf_size, esmp, ndescs,
+	    EFX_RXQ_TYPE_PACKED_STREAM, &type_data, esmp, ndescs,
 	    0 /* id unused on EF10 */, EFX_RXQ_FLAG_NONE, eep, erpp);
 }
 
@@ -1510,7 +1516,7 @@
 	__in		unsigned int index,
 	__in		unsigned int label,
 	__in		efx_rxq_type_t type,
-	__in		uint32_t type_data,
+	__in		const efx_rxq_type_data_t *type_data,
 	__in		efsys_mem_t *esmp,
 	__in		size_t ndescs,
 	__in		uint32_t id,