From: Nélio Laranjeiro <nelio.laranjeiro@6wind.com>
Date: Fri, 24 Jun 2016 13:17:53 +0000 (+0200)
Subject: net/mlx5: refactor Tx data path
X-Git-Tag: spdx-start~6394
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=1d88ba1719429c1e41bd61ab3add65ad9cc43551;p=dpdk.git

net/mlx5: refactor Tx data path

Bypass Verbs to improve Tx performance.

Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
Signed-off-by: Yaacov Hazan <yaacovh@mellanox.com>
Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
---

diff --git a/drivers/net/mlx5/Makefile b/drivers/net/mlx5/Makefile
index aaedd78a4a..f6d39388e8 100644
--- a/drivers/net/mlx5/Makefile
+++ b/drivers/net/mlx5/Makefile
@@ -106,11 +106,6 @@ mlx5_autoconf.h.new: FORCE
 
 mlx5_autoconf.h.new: $(RTE_SDK)/scripts/auto-config-h.sh
 	$Q $(RM) -f -- '$@'
-	$Q sh -- '$<' '$@' \
-		HAVE_VERBS_VLAN_INSERTION \
-		infiniband/verbs.h \
-		enum IBV_EXP_RECEIVE_WQ_CVLAN_INSERTION \
-		$(AUTOCONF_OUTPUT)
 	$Q sh -- '$<' '$@' \
 		HAVE_VERBS_IBV_EXP_CQ_COMPRESSED_CQE \
 		infiniband/verbs_exp.h \
diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index 16b05d3bad..47e64b2a7e 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -1242,11 +1242,11 @@ mlx5_secondary_data_setup(struct priv *priv)
 		txq_ctrl = rte_calloc_socket("TXQ", 1, sizeof(*txq_ctrl), 0,
 					     primary_txq_ctrl->socket);
 		if (txq_ctrl != NULL) {
-			if (txq_setup(priv->dev,
-				      primary_txq_ctrl,
-				      primary_txq->elts_n,
-				      primary_txq_ctrl->socket,
-				      NULL) == 0) {
+			if (txq_ctrl_setup(priv->dev,
+					   primary_txq_ctrl,
+					   primary_txq->elts_n,
+					   primary_txq_ctrl->socket,
+					   NULL) == 0) {
 				txq_ctrl->txq.stats.idx =
 					primary_txq->stats.idx;
 				tx_queues[i] = &txq_ctrl->txq;
diff --git a/drivers/net/mlx5/mlx5_mr.c b/drivers/net/mlx5/mlx5_mr.c
index 1d8bf725c9..67dfefa8da 100644
--- a/drivers/net/mlx5/mlx5_mr.c
+++ b/drivers/net/mlx5/mlx5_mr.c
@@ -190,7 +190,7 @@ txq_mp2mr_reg(struct txq *txq, struct rte_mempool *mp, unsigned int idx)
 	/* Add a new entry, register MR first. */
 	DEBUG("%p: discovered new memory pool \"%s\" (%p)",
 	      (void *)txq_ctrl, mp->name, (void *)mp);
-	mr = mlx5_mp2mr(txq_ctrl->txq.priv->pd, mp);
+	mr = mlx5_mp2mr(txq_ctrl->priv->pd, mp);
 	if (unlikely(mr == NULL)) {
 		DEBUG("%p: unable to configure MR, ibv_reg_mr() failed.",
 		      (void *)txq_ctrl);
@@ -209,7 +209,7 @@ txq_mp2mr_reg(struct txq *txq, struct rte_mempool *mp, unsigned int idx)
 	/* Store the new entry. */
 	txq_ctrl->txq.mp2mr[idx].mp = mp;
 	txq_ctrl->txq.mp2mr[idx].mr = mr;
-	txq_ctrl->txq.mp2mr[idx].lkey = mr->lkey;
+	txq_ctrl->txq.mp2mr[idx].lkey = htonl(mr->lkey);
 	DEBUG("%p: new MR lkey for MP \"%s\" (%p): 0x%08" PRIu32,
 	      (void *)txq_ctrl, mp->name, (void *)mp,
 	      txq_ctrl->txq.mp2mr[idx].lkey);
diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index 87d09e9b8c..5060d1a56e 100644
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -119,68 +119,52 @@ get_cqe64(volatile struct mlx5_cqe cqes[],
  *
  * @param txq
  *   Pointer to TX queue structure.
- *
- * @return
- *   0 on success, -1 on failure.
  */
-static int
+static void
 txq_complete(struct txq *txq)
 {
-	unsigned int elts_comp = txq->elts_comp;
-	unsigned int elts_tail = txq->elts_tail;
-	unsigned int elts_free = txq->elts_tail;
 	const unsigned int elts_n = txq->elts_n;
-	int wcs_n;
-
-	if (unlikely(elts_comp == 0))
-		return 0;
-#ifdef DEBUG_SEND
-	DEBUG("%p: processing %u work requests completions",
-	      (void *)txq, elts_comp);
-#endif
-	wcs_n = txq->poll_cnt(txq->cq, elts_comp);
-	if (unlikely(wcs_n == 0))
-		return 0;
-	if (unlikely(wcs_n < 0)) {
-		DEBUG("%p: ibv_poll_cq() failed (wcs_n=%d)",
-		      (void *)txq, wcs_n);
-		return -1;
+	const unsigned int cqe_n = txq->cqe_n;
+	uint16_t elts_free = txq->elts_tail;
+	uint16_t elts_tail;
+	uint16_t cq_ci = txq->cq_ci;
+	unsigned int wqe_ci = (unsigned int)-1;
+	int ret = 0;
+
+	while (ret == 0) {
+		volatile struct mlx5_cqe64 *cqe;
+
+		cqe = get_cqe64(*txq->cqes, cqe_n, &cq_ci);
+		if (cqe == NULL)
+			break;
+		wqe_ci = ntohs(cqe->wqe_counter);
 	}
-	elts_comp -= wcs_n;
-	assert(elts_comp <= txq->elts_comp);
-	/*
-	 * Assume WC status is successful as nothing can be done about it
-	 * anyway.
-	 */
-	elts_tail += wcs_n * txq->elts_comp_cd_init;
-	if (elts_tail >= elts_n)
-		elts_tail -= elts_n;
-
-	while (elts_free != elts_tail) {
-		struct txq_elt *elt = &(*txq->elts)[elts_free];
+	if (unlikely(wqe_ci == (unsigned int)-1))
+		return;
+	/* Free buffers. */
+	elts_tail = (wqe_ci + 1) & (elts_n - 1);
+	do {
+		struct rte_mbuf *elt = (*txq->elts)[elts_free];
 		unsigned int elts_free_next =
-			(((elts_free + 1) == elts_n) ? 0 : elts_free + 1);
-		struct rte_mbuf *tmp = elt->buf;
-		struct txq_elt *elt_next = &(*txq->elts)[elts_free_next];
+			(elts_free + 1) & (elts_n - 1);
+		struct rte_mbuf *elt_next = (*txq->elts)[elts_free_next];
 
 #ifndef NDEBUG
 		/* Poisoning. */
-		memset(elt, 0x66, sizeof(*elt));
+		memset(&(*txq->elts)[elts_free],
+		       0x66,
+		       sizeof((*txq->elts)[elts_free]));
 #endif
-		RTE_MBUF_PREFETCH_TO_FREE(elt_next->buf);
-		/* Faster than rte_pktmbuf_free(). */
-		do {
-			struct rte_mbuf *next = NEXT(tmp);
-
-			rte_pktmbuf_free_seg(tmp);
-			tmp = next;
-		} while (tmp != NULL);
+		RTE_MBUF_PREFETCH_TO_FREE(elt_next);
+		/* Only one segment needs to be freed. */
+		rte_pktmbuf_free_seg(elt);
 		elts_free = elts_free_next;
-	}
-
+	} while (elts_free != elts_tail);
+	txq->cq_ci = cq_ci;
 	txq->elts_tail = elts_tail;
-	txq->elts_comp = elts_comp;
-	return 0;
+	/* Update the consumer index. */
+	rte_wmb();
+	*txq->cq_db = htonl(cq_ci);
 }
 
 /**
@@ -231,7 +215,8 @@ txq_mp2mr(struct txq *txq, struct rte_mempool *mp)
 		}
 		if (txq->mp2mr[i].mp == mp) {
 			assert(txq->mp2mr[i].lkey != (uint32_t)-1);
-			assert(txq->mp2mr[i].mr->lkey == txq->mp2mr[i].lkey);
+			assert(htonl(txq->mp2mr[i].mr->lkey) ==
+			       txq->mp2mr[i].lkey);
 			lkey = txq->mp2mr[i].lkey;
 			break;
 		}
@@ -242,33 +227,136 @@ txq_mp2mr(struct txq *txq, struct rte_mempool *mp)
 }
 
 /**
- * Insert VLAN using mbuf headroom space.
- *
- * @param buf
- *   Buffer for VLAN insertion.
+ * Write a regular WQE.
  *
- * @return
- *   0 on success, errno value on failure.
+ * @param txq
+ *   Pointer to TX queue structure.
+ * @param wqe
+ *   Pointer to the WQE to fill.
+ * @param addr
+ *   Buffer data address.
+ * @param length
+ *   Packet length.
+ * @param lkey
+ *   Memory region lkey.
  */
-static inline int
-insert_vlan_sw(struct rte_mbuf *buf)
+static inline void
+mlx5_wqe_write(struct txq *txq, volatile union mlx5_wqe *wqe,
+	       uintptr_t addr, uint32_t length, uint32_t lkey)
 {
-	uintptr_t addr;
-	uint32_t vlan;
-	uint16_t head_room_len = rte_pktmbuf_headroom(buf);
+	wqe->wqe.ctrl.data[0] = htonl((txq->wqe_ci << 8) | MLX5_OPCODE_SEND);
+	wqe->wqe.ctrl.data[1] = htonl((txq->qp_num_8s) | 4);
+	wqe->wqe.ctrl.data[3] = 0;
+	wqe->inl.eseg.rsvd0 = 0;
+	wqe->inl.eseg.rsvd1 = 0;
+	wqe->inl.eseg.mss = 0;
+	wqe->inl.eseg.rsvd2 = 0;
+	wqe->wqe.eseg.inline_hdr_sz = htons(MLX5_ETH_INLINE_HEADER_SIZE);
+	/* Copy the first 16 bytes into inline header. */
+	rte_memcpy((uint8_t *)(uintptr_t)wqe->wqe.eseg.inline_hdr_start,
+		   (uint8_t *)(uintptr_t)addr,
+		   MLX5_ETH_INLINE_HEADER_SIZE);
+	addr += MLX5_ETH_INLINE_HEADER_SIZE;
+	length -= MLX5_ETH_INLINE_HEADER_SIZE;
+	/* Store remaining data in data segment. */
+	wqe->wqe.dseg.byte_count = htonl(length);
+	wqe->wqe.dseg.lkey = lkey;
+	wqe->wqe.dseg.addr = htonll(addr);
+	/* Increment consumer index. */
+	++txq->wqe_ci;
+}
 
-	if (head_room_len < 4)
-		return EINVAL;
+/**
+ * Write a regular WQE with VLAN.
+ *
+ * @param txq
+ *   Pointer to TX queue structure.
+ * @param wqe
+ *   Pointer to the WQE to fill.
+ * @param addr
+ *   Buffer data address.
+ * @param length
+ *   Packet length.
+ * @param lkey
+ *   Memory region lkey.
+ * @param vlan_tci
+ *   VLAN field to insert in packet.
+ */
+static inline void
+mlx5_wqe_write_vlan(struct txq *txq, volatile union mlx5_wqe *wqe,
+		    uintptr_t addr, uint32_t length, uint32_t lkey,
+		    uint16_t vlan_tci)
+{
+	uint32_t vlan = htonl(0x81000000 | vlan_tci);
+
+	wqe->wqe.ctrl.data[0] = htonl((txq->wqe_ci << 8) | MLX5_OPCODE_SEND);
+	wqe->wqe.ctrl.data[1] = htonl((txq->qp_num_8s) | 4);
+	wqe->wqe.ctrl.data[3] = 0;
+	wqe->inl.eseg.rsvd0 = 0;
+	wqe->inl.eseg.rsvd1 = 0;
+	wqe->inl.eseg.mss = 0;
+	wqe->inl.eseg.rsvd2 = 0;
+	wqe->wqe.eseg.inline_hdr_sz = htons(MLX5_ETH_VLAN_INLINE_HEADER_SIZE);
+	/*
+	 * Copy 12 bytes of source & destination MAC address.
+	 * Copy 4 bytes of VLAN.
+	 * Copy 2 bytes of Ether type.
+	 */
+	rte_memcpy((uint8_t *)(uintptr_t)wqe->wqe.eseg.inline_hdr_start,
+		   (uint8_t *)(uintptr_t)addr, 12);
+	rte_memcpy((uint8_t *)((uintptr_t)wqe->wqe.eseg.inline_hdr_start + 12),
+		   &vlan, sizeof(vlan));
+	rte_memcpy((uint8_t *)((uintptr_t)wqe->wqe.eseg.inline_hdr_start + 16),
+		   (uint8_t *)((uintptr_t)addr + 12), 2);
+	addr += MLX5_ETH_VLAN_INLINE_HEADER_SIZE - sizeof(vlan);
+	length -= MLX5_ETH_VLAN_INLINE_HEADER_SIZE - sizeof(vlan);
+	/* Store remaining data in data segment. */
+	wqe->wqe.dseg.byte_count = htonl(length);
+	wqe->wqe.dseg.lkey = lkey;
+	wqe->wqe.dseg.addr = htonll(addr);
+	/* Increment consumer index. */
+	++txq->wqe_ci;
+}
 
-	addr = rte_pktmbuf_mtod(buf, uintptr_t);
-	vlan = htonl(0x81000000 | buf->vlan_tci);
-	memmove((void *)(addr - 4), (void *)addr, 12);
-	memcpy((void *)(addr + 8), &vlan, sizeof(vlan));
+/**
+ * Ring TX queue doorbell.
+ *
+ * @param txq
+ *   Pointer to TX queue structure.
+ */
+static inline void
+mlx5_tx_dbrec(struct txq *txq)
+{
+	uint8_t *dst = (uint8_t *)((uintptr_t)txq->bf_reg + txq->bf_offset);
+	uint32_t data[4] = {
+		htonl((txq->wqe_ci << 8) | MLX5_OPCODE_SEND),
+		htonl(txq->qp_num_8s),
+		0,
+		0,
+	};
+	rte_wmb();
+	*txq->qp_db = htonl(txq->wqe_ci);
+	/* Ensure ordering between DB record and BF copy. */
+	rte_wmb();
+	rte_mov16(dst, (uint8_t *)data);
+	txq->bf_offset ^= txq->bf_buf_size;
+}
 
-	SET_DATA_OFF(buf, head_room_len - 4);
-	DATA_LEN(buf) += 4;
+/**
+ * Prefetch a CQE.
+ *
+ * @param txq
+ *   Pointer to TX queue structure.
+ * @param cqe_ci
+ *   CQE consumer index.
+ */
+static inline void
+tx_prefetch_cqe(struct txq *txq, uint16_t ci)
+{
+	volatile struct mlx5_cqe64 *cqe;
 
-	return 0;
+	cqe = &(*txq->cqes)[ci & (txq->cqe_n - 1)].cqe64;
+	rte_prefetch0(cqe);
 }
 
 /**
@@ -288,18 +376,21 @@ uint16_t
 mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
 {
 	struct txq *txq = (struct txq *)dpdk_txq;
-	unsigned int elts_head = txq->elts_head;
+	uint16_t elts_head = txq->elts_head;
 	const unsigned int elts_n = txq->elts_n;
-	unsigned int elts_comp_cd = txq->elts_comp_cd;
-	unsigned int elts_comp = 0;
 	unsigned int i;
 	unsigned int max;
-	int err;
-	struct rte_mbuf *buf = pkts[0];
+	volatile union mlx5_wqe *wqe;
+	struct rte_mbuf *buf;
 
-	assert(elts_comp_cd != 0);
+	if (unlikely(!pkts_n))
+		return 0;
+	buf = pkts[0];
 	/* Prefetch first packet cacheline. */
+	tx_prefetch_cqe(txq, txq->cq_ci);
+	tx_prefetch_cqe(txq, txq->cq_ci + 1);
 	rte_prefetch0(buf);
+	/* Start processing. */
 	txq_complete(txq);
 	max = (elts_n - (elts_head - txq->elts_tail));
 	if (max > elts_n)
@@ -313,101 +404,53 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
 	if (max > pkts_n)
 		max = pkts_n;
 	for (i = 0; (i != max); ++i) {
-		struct rte_mbuf *buf_next = pkts[i + 1];
-		unsigned int elts_head_next =
-			(((elts_head + 1) == elts_n) ? 0 : elts_head + 1);
-		struct txq_elt *elt = &(*txq->elts)[elts_head];
-		uint32_t send_flags = 0;
-#ifdef HAVE_VERBS_VLAN_INSERTION
-		int insert_vlan = 0;
-#endif /* HAVE_VERBS_VLAN_INSERTION */
+		unsigned int elts_head_next = (elts_head + 1) & (elts_n - 1);
 		uintptr_t addr;
 		uint32_t length;
 		uint32_t lkey;
-		uintptr_t buf_next_addr;
 
+		wqe = &(*txq->wqes)[txq->wqe_ci & (txq->wqe_n - 1)];
+		rte_prefetch0(wqe);
 		if (i + 1 < max)
-			rte_prefetch0(buf_next);
-		/* Request TX completion. */
-		if (unlikely(--elts_comp_cd == 0)) {
-			elts_comp_cd = txq->elts_comp_cd_init;
-			++elts_comp;
-			send_flags |= IBV_EXP_QP_BURST_SIGNALED;
-		}
-		/* Should we enable HW CKSUM offload */
-		if (buf->ol_flags &
-		    (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM)) {
-			send_flags |= IBV_EXP_QP_BURST_IP_CSUM;
-			/* HW does not support checksum offloads at arbitrary
-			 * offsets but automatically recognizes the packet
-			 * type. For inner L3/L4 checksums, only VXLAN (UDP)
-			 * tunnels are currently supported. */
-			if (RTE_ETH_IS_TUNNEL_PKT(buf->packet_type))
-				send_flags |= IBV_EXP_QP_BURST_TUNNEL;
-		}
-		if (buf->ol_flags & PKT_TX_VLAN_PKT) {
-#ifdef HAVE_VERBS_VLAN_INSERTION
-			if (!txq->priv->mps)
-				insert_vlan = 1;
-			else
-#endif /* HAVE_VERBS_VLAN_INSERTION */
-			{
-				err = insert_vlan_sw(buf);
-				if (unlikely(err))
-					goto stop;
-			}
-		}
+			rte_prefetch0(pkts[i + 1]);
 		/* Retrieve buffer information. */
 		addr = rte_pktmbuf_mtod(buf, uintptr_t);
 		length = DATA_LEN(buf);
 		/* Update element. */
-		elt->buf = buf;
-		if (txq->priv->sriov)
-			rte_prefetch0((volatile void *)
-				      (uintptr_t)addr);
+		(*txq->elts)[elts_head] = buf;
 		/* Prefetch next buffer data. */
-		if (i + 1 < max) {
-			buf_next_addr =
-				rte_pktmbuf_mtod(buf_next, uintptr_t);
-			rte_prefetch0((volatile void *)
-				      (uintptr_t)buf_next_addr);
-		}
+		if (i + 1 < max)
+			rte_prefetch0(rte_pktmbuf_mtod(pkts[i + 1],
+						       volatile void *));
 		/* Retrieve Memory Region key for this memory pool. */
 		lkey = txq_mp2mr(txq, txq_mb2mp(buf));
-		if (unlikely(lkey == (uint32_t)-1)) {
-			/* MR does not exist. */
-			DEBUG("%p: unable to get MP <-> MR"
-			      " association", (void *)txq);
-			/* Clean up TX element. */
-			elt->buf = NULL;
-			goto stop;
-		}
-#ifdef HAVE_VERBS_VLAN_INSERTION
-		if (insert_vlan)
-			err = txq->send_pending_vlan
-				(txq->qp,
-				 addr,
-				 length,
-				 lkey,
-				 send_flags,
-				 &buf->vlan_tci);
+		if (buf->ol_flags & PKT_TX_VLAN_PKT)
+			mlx5_wqe_write_vlan(txq, wqe, addr, length, lkey,
+					    buf->vlan_tci);
 		else
-#endif /* HAVE_VERBS_VLAN_INSERTION */
-			err = txq->send_pending
-				(txq->qp,
-				 addr,
-				 length,
-				 lkey,
-				 send_flags);
-		if (unlikely(err))
-			goto stop;
+			mlx5_wqe_write(txq, wqe, addr, length, lkey);
+		/* Request completion if needed. */
+		if (unlikely(--txq->elts_comp == 0)) {
+			wqe->wqe.ctrl.data[2] = htonl(8);
+			txq->elts_comp = txq->elts_comp_cd_init;
+		} else {
+			wqe->wqe.ctrl.data[2] = 0;
+		}
+		/* Should we enable HW CKSUM offload */
+		if (buf->ol_flags &
+		    (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM)) {
+			wqe->wqe.eseg.cs_flags =
+				MLX5_ETH_WQE_L3_CSUM |
+				MLX5_ETH_WQE_L4_CSUM;
+		} else {
+			wqe->wqe.eseg.cs_flags = 0;
+		}
 #ifdef MLX5_PMD_SOFT_COUNTERS
 		/* Increment sent bytes counter. */
 		txq->stats.obytes += length;
 #endif
-stop:
 		elts_head = elts_head_next;
-		buf = buf_next;
+		buf = pkts[i + 1];
 	}
 	/* Take a shortcut if nothing must be sent. */
 	if (unlikely(i == 0))
@@ -417,16 +460,8 @@ stop:
 	txq->stats.opackets += i;
 #endif
 	/* Ring QP doorbell. */
-	err = txq->send_flush(txq->qp);
-	if (unlikely(err)) {
-		/* A nonzero value is not supposed to be returned.
-		 * Nothing can be done about it. */
-		DEBUG("%p: send_flush() failed with error %d",
-		      (void *)txq, err);
-	}
+	mlx5_tx_dbrec(txq);
 	txq->elts_head = elts_head;
-	txq->elts_comp += elts_comp;
-	txq->elts_comp_cd = elts_comp_cd;
 	return i;
 }
 
diff --git a/drivers/net/mlx5/mlx5_rxtx.h b/drivers/net/mlx5/mlx5_rxtx.h
index 1827123760..6b3bb2df4f 100644
--- a/drivers/net/mlx5/mlx5_rxtx.h
+++ b/drivers/net/mlx5/mlx5_rxtx.h
@@ -223,44 +223,40 @@ struct hash_rxq {
 		[MLX5_MAX_SPECIAL_FLOWS][MLX5_MAX_VLAN_IDS];
 };
 
-/* TX element. */
-struct txq_elt {
-	struct rte_mbuf *buf;
-};
-
 /* TX queue descriptor. */
 struct txq {
-	struct priv *priv; /* Back pointer to private data. */
-	int32_t (*poll_cnt)(struct ibv_cq *cq, uint32_t max);
-	int (*send_pending)();
-#ifdef HAVE_VERBS_VLAN_INSERTION
-	int (*send_pending_vlan)();
-#endif
-	int (*send_flush)(struct ibv_qp *qp);
-	struct ibv_cq *cq; /* Completion Queue. */
-	struct ibv_qp *qp; /* Queue Pair. */
-	struct txq_elt (*elts)[]; /* TX elements. */
-	unsigned int elts_n; /* (*elts)[] length. */
-	unsigned int elts_head; /* Current index in (*elts)[]. */
-	unsigned int elts_tail; /* First element awaiting completion. */
-	unsigned int elts_comp; /* Number of completion requests. */
-	unsigned int elts_comp_cd; /* Countdown for next completion request. */
-	unsigned int elts_comp_cd_init; /* Initial value for countdown. */
+	uint16_t elts_head; /* Current index in (*elts)[]. */
+	uint16_t elts_tail; /* First element awaiting completion. */
+	uint16_t elts_comp_cd_init; /* Initial value for countdown. */
+	uint16_t elts_comp; /* Elements before asking a completion. */
+	uint16_t elts_n; /* (*elts)[] length. */
+	uint16_t cq_ci; /* Consumer index for completion queue. */
+	uint16_t cqe_n; /* Number of CQ elements. */
+	uint16_t wqe_ci; /* Consumer index for work queue. */
+	uint16_t wqe_n; /* Number of WQ elements. */
+	uint16_t bf_offset; /* Blueflame offset. */
+	uint16_t bf_buf_size; /* Blueflame size. */
+	volatile struct mlx5_cqe (*cqes)[]; /* Completion queue. */
+	volatile union mlx5_wqe (*wqes)[]; /* Work queue. */
+	volatile uint32_t *qp_db; /* Work queue doorbell. */
+	volatile uint32_t *cq_db; /* Completion queue doorbell. */
+	volatile void *bf_reg; /* Blueflame register. */
 	struct {
 		const struct rte_mempool *mp; /* Cached Memory Pool. */
 		struct ibv_mr *mr; /* Memory Region (for mp). */
-		uint32_t lkey; /* mr->lkey */
+		uint32_t lkey; /* htonl(mr->lkey) */
 	} mp2mr[MLX5_PMD_TX_MP_CACHE]; /* MP to MR translation table. */
+	struct rte_mbuf *(*elts)[]; /* TX elements. */
 	struct mlx5_txq_stats stats; /* TX queue counters. */
+	uint32_t qp_num_8s; /* QP number shifted by 8. */
 } __rte_cache_aligned;
 
 /* TX queue control descriptor. */
 struct txq_ctrl {
-#ifdef HAVE_VERBS_VLAN_INSERTION
-	struct ibv_exp_qp_burst_family_v1 *if_qp; /* QP burst interface. */
-#else
+	struct priv *priv; /* Back pointer to private data. */
+	struct ibv_cq *cq; /* Completion Queue. */
+	struct ibv_qp *qp; /* Queue Pair. */
 	struct ibv_exp_qp_burst_family *if_qp; /* QP burst interface. */
-#endif
 	struct ibv_exp_cq_family *if_cq; /* CQ interface. */
 	struct ibv_exp_res_domain *rd; /* Resource Domain. */
 	unsigned int socket; /* CPU socket ID for allocations. */
@@ -294,8 +290,8 @@ uint16_t mlx5_rx_burst_secondary_setup(void *, struct rte_mbuf **, uint16_t);
 /* mlx5_txq.c */
 
 void txq_cleanup(struct txq_ctrl *);
-int txq_setup(struct rte_eth_dev *, struct txq_ctrl *, uint16_t, unsigned int,
-	      const struct rte_eth_txconf *);
+int txq_ctrl_setup(struct rte_eth_dev *, struct txq_ctrl *, uint16_t,
+		   unsigned int, const struct rte_eth_txconf *);
 int mlx5_tx_queue_setup(struct rte_eth_dev *, uint16_t, uint16_t, unsigned int,
 			const struct rte_eth_txconf *);
 void mlx5_tx_queue_release(void *);
diff --git a/drivers/net/mlx5/mlx5_txq.c b/drivers/net/mlx5/mlx5_txq.c
index ec4488aa10..26d6168543 100644
--- a/drivers/net/mlx5/mlx5_txq.c
+++ b/drivers/net/mlx5/mlx5_txq.c
@@ -60,6 +60,7 @@
 #endif
 
 #include "mlx5_utils.h"
+#include "mlx5_defs.h"
 #include "mlx5.h"
 #include "mlx5_rxtx.h"
 #include "mlx5_autoconf.h"
@@ -72,48 +73,22 @@
  *   Pointer to TX queue structure.
  * @param elts_n
  *   Number of elements to allocate.
- *
- * @return
- *   0 on success, errno value on failure.
  */
-static int
+static void
 txq_alloc_elts(struct txq_ctrl *txq_ctrl, unsigned int elts_n)
 {
 	unsigned int i;
-	struct txq_elt (*elts)[elts_n] =
-		rte_calloc_socket("TXQ", 1, sizeof(*elts), 0, txq_ctrl->socket);
-	int ret = 0;
 
-	if (elts == NULL) {
-		ERROR("%p: can't allocate packets array", (void *)txq_ctrl);
-		ret = ENOMEM;
-		goto error;
-	}
-	for (i = 0; (i != elts_n); ++i) {
-		struct txq_elt *elt = &(*elts)[i];
+	for (i = 0; (i != elts_n); ++i)
+		(*txq_ctrl->txq.elts)[i] = NULL;
+	for (i = 0; (i != txq_ctrl->txq.wqe_n); ++i) {
+		volatile union mlx5_wqe *wqe = &(*txq_ctrl->txq.wqes)[i];
 
-		elt->buf = NULL;
+		memset((void *)(uintptr_t)wqe, 0x0, sizeof(*wqe));
 	}
 	DEBUG("%p: allocated and configured %u WRs", (void *)txq_ctrl, elts_n);
-	txq_ctrl->txq.elts_n = elts_n;
-	txq_ctrl->txq.elts = elts;
 	txq_ctrl->txq.elts_head = 0;
 	txq_ctrl->txq.elts_tail = 0;
-	txq_ctrl->txq.elts_comp = 0;
-	/* Request send completion every MLX5_PMD_TX_PER_COMP_REQ packets or
-	 * at least 4 times per ring. */
-	txq_ctrl->txq.elts_comp_cd_init =
-		((MLX5_PMD_TX_PER_COMP_REQ < (elts_n / 4)) ?
-		 MLX5_PMD_TX_PER_COMP_REQ : (elts_n / 4));
-	txq_ctrl->txq.elts_comp_cd = txq_ctrl->txq.elts_comp_cd_init;
-	assert(ret == 0);
-	return 0;
-error:
-	rte_free(elts);
-
-	DEBUG("%p: failed, freed everything", (void *)txq_ctrl);
-	assert(ret > 0);
-	return ret;
 }
 
 /**
@@ -128,32 +103,26 @@ txq_free_elts(struct txq_ctrl *txq_ctrl)
 	unsigned int elts_n = txq_ctrl->txq.elts_n;
 	unsigned int elts_head = txq_ctrl->txq.elts_head;
 	unsigned int elts_tail = txq_ctrl->txq.elts_tail;
-	struct txq_elt (*elts)[elts_n] = txq_ctrl->txq.elts;
+	struct rte_mbuf *(*elts)[elts_n] = txq_ctrl->txq.elts;
 
 	DEBUG("%p: freeing WRs", (void *)txq_ctrl);
-	txq_ctrl->txq.elts_n = 0;
 	txq_ctrl->txq.elts_head = 0;
 	txq_ctrl->txq.elts_tail = 0;
-	txq_ctrl->txq.elts_comp = 0;
-	txq_ctrl->txq.elts_comp_cd = 0;
-	txq_ctrl->txq.elts_comp_cd_init = 0;
-	txq_ctrl->txq.elts = NULL;
 
-	if (elts == NULL)
-		return;
 	while (elts_tail != elts_head) {
-		struct txq_elt *elt = &(*elts)[elts_tail];
+		struct rte_mbuf *elt = (*elts)[elts_tail];
 
-		assert(elt->buf != NULL);
-		rte_pktmbuf_free(elt->buf);
+		assert(elt != NULL);
+		rte_pktmbuf_free(elt);
 #ifndef NDEBUG
 		/* Poisoning. */
-		memset(elt, 0x77, sizeof(*elt));
+		memset(&(*elts)[elts_tail],
+		       0x77,
+		       sizeof((*elts)[elts_tail]));
 #endif
 		if (++elts_tail == elts_n)
 			elts_tail = 0;
 	}
-	rte_free(elts);
 }
 
 /**
@@ -172,42 +141,40 @@ txq_cleanup(struct txq_ctrl *txq_ctrl)
 
 	DEBUG("cleaning up %p", (void *)txq_ctrl);
 	txq_free_elts(txq_ctrl);
-	txq_ctrl->txq.poll_cnt = NULL;
-	txq_ctrl->txq.send_flush = NULL;
 	if (txq_ctrl->if_qp != NULL) {
-		assert(txq_ctrl->txq.priv != NULL);
-		assert(txq_ctrl->txq.priv->ctx != NULL);
-		assert(txq_ctrl->txq.qp != NULL);
+		assert(txq_ctrl->priv != NULL);
+		assert(txq_ctrl->priv->ctx != NULL);
+		assert(txq_ctrl->qp != NULL);
 		params = (struct ibv_exp_release_intf_params){
 			.comp_mask = 0,
 		};
-		claim_zero(ibv_exp_release_intf(txq_ctrl->txq.priv->ctx,
+		claim_zero(ibv_exp_release_intf(txq_ctrl->priv->ctx,
 						txq_ctrl->if_qp,
 						&params));
 	}
 	if (txq_ctrl->if_cq != NULL) {
-		assert(txq_ctrl->txq.priv != NULL);
-		assert(txq_ctrl->txq.priv->ctx != NULL);
-		assert(txq_ctrl->txq.cq != NULL);
+		assert(txq_ctrl->priv != NULL);
+		assert(txq_ctrl->priv->ctx != NULL);
+		assert(txq_ctrl->cq != NULL);
 		params = (struct ibv_exp_release_intf_params){
 			.comp_mask = 0,
 		};
-		claim_zero(ibv_exp_release_intf(txq_ctrl->txq.priv->ctx,
+		claim_zero(ibv_exp_release_intf(txq_ctrl->priv->ctx,
 						txq_ctrl->if_cq,
 						&params));
 	}
-	if (txq_ctrl->txq.qp != NULL)
-		claim_zero(ibv_destroy_qp(txq_ctrl->txq.qp));
-	if (txq_ctrl->txq.cq != NULL)
-		claim_zero(ibv_destroy_cq(txq_ctrl->txq.cq));
+	if (txq_ctrl->qp != NULL)
+		claim_zero(ibv_destroy_qp(txq_ctrl->qp));
+	if (txq_ctrl->cq != NULL)
+		claim_zero(ibv_destroy_cq(txq_ctrl->cq));
 	if (txq_ctrl->rd != NULL) {
 		struct ibv_exp_destroy_res_domain_attr attr = {
 			.comp_mask = 0,
 		};
 
-		assert(txq_ctrl->txq.priv != NULL);
-		assert(txq_ctrl->txq.priv->ctx != NULL);
-		claim_zero(ibv_exp_destroy_res_domain(txq_ctrl->txq.priv->ctx,
+		assert(txq_ctrl->priv != NULL);
+		assert(txq_ctrl->priv->ctx != NULL);
+		claim_zero(ibv_exp_destroy_res_domain(txq_ctrl->priv->ctx,
 						      txq_ctrl->rd,
 						      &attr));
 	}
@@ -220,6 +187,49 @@ txq_cleanup(struct txq_ctrl *txq_ctrl)
 	memset(txq_ctrl, 0, sizeof(*txq_ctrl));
 }
 
+/**
+ * Initialize TX queue.
+ *
+ * @param tmpl
+ *   Pointer to TX queue control template.
+ * @param txq_ctrl
+ *   Pointer to TX queue control.
+ *
+ * @return
+ *   0 on success, errno value on failure.
+ */
+static inline int
+txq_setup(struct txq_ctrl *tmpl, struct txq_ctrl *txq_ctrl)
+{
+	struct mlx5_qp *qp = to_mqp(tmpl->qp);
+	struct ibv_cq *ibcq = tmpl->cq;
+	struct mlx5_cq *cq = to_mxxx(cq, cq);
+
+	if (cq->cqe_sz != RTE_CACHE_LINE_SIZE) {
+		ERROR("Wrong MLX5_CQE_SIZE environment variable value: "
+		      "it should be set to %u", RTE_CACHE_LINE_SIZE);
+		return EINVAL;
+	}
+	tmpl->txq.cqe_n = ibcq->cqe + 1;
+	tmpl->txq.qp_num_8s = qp->ctrl_seg.qp_num << 8;
+	tmpl->txq.wqes =
+		(volatile union mlx5_wqe (*)[])
+		(uintptr_t)qp->gen_data.sqstart;
+	tmpl->txq.wqe_n = qp->sq.wqe_cnt;
+	tmpl->txq.qp_db = &qp->gen_data.db[MLX5_SND_DBR];
+	tmpl->txq.bf_reg = qp->gen_data.bf->reg;
+	tmpl->txq.bf_offset = qp->gen_data.bf->offset;
+	tmpl->txq.bf_buf_size = qp->gen_data.bf->buf_size;
+	tmpl->txq.cq_db = cq->dbrec;
+	tmpl->txq.cqes =
+		(volatile struct mlx5_cqe (*)[])
+		(uintptr_t)cq->active_buf->buf;
+	tmpl->txq.elts =
+		(struct rte_mbuf *(*)[tmpl->txq.elts_n])
+		((uintptr_t)txq_ctrl + sizeof(*txq_ctrl));
+	return 0;
+}
+
 /**
  * Configure a TX queue.
  *
@@ -238,15 +248,14 @@ txq_cleanup(struct txq_ctrl *txq_ctrl)
  *   0 on success, errno value on failure.
  */
 int
-txq_setup(struct rte_eth_dev *dev, struct txq_ctrl *txq_ctrl, uint16_t desc,
-	  unsigned int socket, const struct rte_eth_txconf *conf)
+txq_ctrl_setup(struct rte_eth_dev *dev, struct txq_ctrl *txq_ctrl,
+	       uint16_t desc, unsigned int socket,
+	       const struct rte_eth_txconf *conf)
 {
 	struct priv *priv = mlx5_get_priv(dev);
 	struct txq_ctrl tmpl = {
+		.priv = priv,
 		.socket = socket,
-		.txq = {
-			.priv = priv,
-		},
 	};
 	union {
 		struct ibv_exp_query_intf_params params;
@@ -254,15 +263,21 @@ txq_setup(struct rte_eth_dev *dev, struct txq_ctrl *txq_ctrl, uint16_t desc,
 		struct ibv_exp_res_domain_init_attr rd;
 		struct ibv_exp_cq_init_attr cq;
 		struct ibv_exp_qp_attr mod;
+		struct ibv_exp_cq_attr cq_attr;
 	} attr;
 	enum ibv_exp_query_intf_status status;
 	int ret = 0;
 
 	(void)conf; /* Thresholds configuration (ignored). */
-	if (desc == 0) {
-		ERROR("%p: invalid number of TX descriptors", (void *)dev);
-		return EINVAL;
-	}
+	tmpl.txq.elts_n = desc;
+	/*
+	 * Request send completion every MLX5_PMD_TX_PER_COMP_REQ packets or
+	 * at least 4 times per ring.
+	 */
+	tmpl.txq.elts_comp_cd_init =
+		((MLX5_PMD_TX_PER_COMP_REQ < (desc / 4)) ?
+		 MLX5_PMD_TX_PER_COMP_REQ : (desc / 4));
+	tmpl.txq.elts_comp = tmpl.txq.elts_comp_cd_init;
 	/* MRs will be registered in mp2mr[] later. */
 	attr.rd = (struct ibv_exp_res_domain_init_attr){
 		.comp_mask = (IBV_EXP_RES_DOMAIN_THREAD_MODEL |
@@ -281,9 +296,10 @@ txq_setup(struct rte_eth_dev *dev, struct txq_ctrl *txq_ctrl, uint16_t desc,
 		.comp_mask = IBV_EXP_CQ_INIT_ATTR_RES_DOMAIN,
 		.res_domain = tmpl.rd,
 	};
-	tmpl.txq.cq = ibv_exp_create_cq(priv->ctx, desc, NULL, NULL, 0,
-					&attr.cq);
-	if (tmpl.txq.cq == NULL) {
+	tmpl.cq = ibv_exp_create_cq(priv->ctx,
+				    (desc / tmpl.txq.elts_comp_cd_init) - 1,
+				    NULL, NULL, 0, &attr.cq);
+	if (tmpl.cq == NULL) {
 		ret = ENOMEM;
 		ERROR("%p: CQ creation failure: %s",
 		      (void *)dev, strerror(ret));
@@ -295,9 +311,9 @@ txq_setup(struct rte_eth_dev *dev, struct txq_ctrl *txq_ctrl, uint16_t desc,
 	      priv->device_attr.max_sge);
 	attr.init = (struct ibv_exp_qp_init_attr){
 		/* CQ to be associated with the send queue. */
-		.send_cq = tmpl.txq.cq,
+		.send_cq = tmpl.cq,
 		/* CQ to be associated with the receive queue. */
-		.recv_cq = tmpl.txq.cq,
+		.recv_cq = tmpl.cq,
 		.cap = {
 			/* Max number of outstanding WRs. */
 			.max_send_wr = ((priv->device_attr.max_qp_wr < desc) ?
@@ -315,8 +331,8 @@ txq_setup(struct rte_eth_dev *dev, struct txq_ctrl *txq_ctrl, uint16_t desc,
 		.comp_mask = (IBV_EXP_QP_INIT_ATTR_PD |
 			      IBV_EXP_QP_INIT_ATTR_RES_DOMAIN),
 	};
-	tmpl.txq.qp = ibv_exp_create_qp(priv->ctx, &attr.init);
-	if (tmpl.txq.qp == NULL) {
+	tmpl.qp = ibv_exp_create_qp(priv->ctx, &attr.init);
+	if (tmpl.qp == NULL) {
 		ret = (errno ? errno : EINVAL);
 		ERROR("%p: QP creation failure: %s",
 		      (void *)dev, strerror(ret));
@@ -328,30 +344,31 @@ txq_setup(struct rte_eth_dev *dev, struct txq_ctrl *txq_ctrl, uint16_t desc,
 		/* Primary port number. */
 		.port_num = priv->port
 	};
-	ret = ibv_exp_modify_qp(tmpl.txq.qp, &attr.mod,
+	ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod,
 				(IBV_EXP_QP_STATE | IBV_EXP_QP_PORT));
 	if (ret) {
 		ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
 		      (void *)dev, strerror(ret));
 		goto error;
 	}
-	ret = txq_alloc_elts(&tmpl, desc);
+	ret = txq_setup(&tmpl, txq_ctrl);
 	if (ret) {
-		ERROR("%p: TXQ allocation failed: %s",
+		ERROR("%p: cannot initialize TX queue structure: %s",
 		      (void *)dev, strerror(ret));
 		goto error;
 	}
+	txq_alloc_elts(&tmpl, desc);
 	attr.mod = (struct ibv_exp_qp_attr){
 		.qp_state = IBV_QPS_RTR
 	};
-	ret = ibv_exp_modify_qp(tmpl.txq.qp, &attr.mod, IBV_EXP_QP_STATE);
+	ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod, IBV_EXP_QP_STATE);
 	if (ret) {
 		ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
 		      (void *)dev, strerror(ret));
 		goto error;
 	}
 	attr.mod.qp_state = IBV_QPS_RTS;
-	ret = ibv_exp_modify_qp(tmpl.txq.qp, &attr.mod, IBV_EXP_QP_STATE);
+	ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod, IBV_EXP_QP_STATE);
 	if (ret) {
 		ERROR("%p: QP state to IBV_QPS_RTS failed: %s",
 		      (void *)dev, strerror(ret));
@@ -360,7 +377,7 @@ txq_setup(struct rte_eth_dev *dev, struct txq_ctrl *txq_ctrl, uint16_t desc,
 	attr.params = (struct ibv_exp_query_intf_params){
 		.intf_scope = IBV_EXP_INTF_GLOBAL,
 		.intf = IBV_EXP_INTF_CQ,
-		.obj = tmpl.txq.cq,
+		.obj = tmpl.cq,
 	};
 	tmpl.if_cq = ibv_exp_query_intf(priv->ctx, &attr.params, &status);
 	if (tmpl.if_cq == NULL) {
@@ -372,10 +389,8 @@ txq_setup(struct rte_eth_dev *dev, struct txq_ctrl *txq_ctrl, uint16_t desc,
 	attr.params = (struct ibv_exp_query_intf_params){
 		.intf_scope = IBV_EXP_INTF_GLOBAL,
 		.intf = IBV_EXP_INTF_QP_BURST,
-		.obj = tmpl.txq.qp,
-#ifdef HAVE_VERBS_VLAN_INSERTION
 		.intf_version = 1,
-#endif
+		.obj = tmpl.qp,
 		/* Enable multi-packet send if supported. */
 		.family_flags =
 			(priv->mps ?
@@ -393,12 +408,6 @@ txq_setup(struct rte_eth_dev *dev, struct txq_ctrl *txq_ctrl, uint16_t desc,
 	DEBUG("%p: cleaning-up old txq just in case", (void *)txq_ctrl);
 	txq_cleanup(txq_ctrl);
 	*txq_ctrl = tmpl;
-	txq_ctrl->txq.poll_cnt = txq_ctrl->if_cq->poll_cnt;
-	txq_ctrl->txq.send_pending = txq_ctrl->if_qp->send_pending;
-#ifdef HAVE_VERBS_VLAN_INSERTION
-	txq_ctrl->txq.send_pending_vlan = txq_ctrl->if_qp->send_pending_vlan;
-#endif
-	txq_ctrl->txq.send_flush = txq_ctrl->if_qp->send_flush;
 	DEBUG("%p: txq updated with %p", (void *)txq_ctrl, (void *)&tmpl);
 	/* Pre-register known mempools. */
 	rte_mempool_walk(txq_mp2mr_iter, txq_ctrl);
@@ -433,15 +442,19 @@ mlx5_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
 {
 	struct priv *priv = dev->data->dev_private;
 	struct txq *txq = (*priv->txqs)[idx];
-	struct txq_ctrl *txq_ctrl;
+	struct txq_ctrl *txq_ctrl = container_of(txq, struct txq_ctrl, txq);
 	int ret;
 
 	if (mlx5_is_secondary())
 		return -E_RTE_SECONDARY;
 
 	priv_lock(priv);
-	if (txq)
-		txq_ctrl = container_of(txq, struct txq_ctrl, txq);
+	if (!rte_is_power_of_2(desc)) {
+		desc = 1 << log2above(desc);
+		WARN("%p: increased number of descriptors in TX queue %u"
+		     " to the next power of two (%d)",
+		     (void *)dev, idx, desc);
+	}
 	DEBUG("%p: configuring queue %u for %u descriptors",
 	      (void *)dev, idx, desc);
 	if (idx >= priv->txqs_n) {
@@ -460,8 +473,11 @@ mlx5_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
 		(*priv->txqs)[idx] = NULL;
 		txq_cleanup(txq_ctrl);
 	} else {
-		txq_ctrl = rte_calloc_socket("TXQ", 1, sizeof(*txq_ctrl),
-					     0, socket);
+		txq_ctrl =
+			rte_calloc_socket("TXQ", 1,
+					  sizeof(*txq_ctrl) +
+					  desc * sizeof(struct rte_mbuf *),
+					  0, socket);
 		if (txq_ctrl == NULL) {
 			ERROR("%p: unable to allocate queue index %u",
 			      (void *)dev, idx);
@@ -469,7 +485,7 @@ mlx5_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
 			return -ENOMEM;
 		}
 	}
-	ret = txq_setup(dev, txq_ctrl, desc, socket, conf);
+	ret = txq_ctrl_setup(dev, txq_ctrl, desc, socket, conf);
 	if (ret)
 		rte_free(txq_ctrl);
 	else {
@@ -504,7 +520,7 @@ mlx5_tx_queue_release(void *dpdk_txq)
 	if (txq == NULL)
 		return;
 	txq_ctrl = container_of(txq, struct txq_ctrl, txq);
-	priv = txq->priv;
+	priv = txq_ctrl->priv;
 	priv_lock(priv);
 	for (i = 0; (i != priv->txqs_n); ++i)
 		if ((*priv->txqs)[i] == txq) {
@@ -539,7 +555,8 @@ mlx5_tx_burst_secondary_setup(void *dpdk_txq, struct rte_mbuf **pkts,
 			      uint16_t pkts_n)
 {
 	struct txq *txq = dpdk_txq;
-	struct priv *priv = mlx5_secondary_data_setup(txq->priv);
+	struct txq_ctrl *txq_ctrl = container_of(txq, struct txq_ctrl, txq);
+	struct priv *priv = mlx5_secondary_data_setup(txq_ctrl->priv);
 	struct priv *primary_priv;
 	unsigned int index;