Merge branch 'enetc-cleanups'

Vladimir Oltean says:

====================
Refactoring/cleanup for NXP ENETC

This series performs the following:
- makes the API for Control Buffer Descriptor Rings in enetc_cbdr.c a
  bit more tightly knit.
- moves more logic into enetc_rxbd_next to make the callers simpler
- moves more logic into enetc_refill_rx_ring to make the callers simpler
- removes forward declarations
- simplifies the probe path to unify probing for used and unused PFs.

Nothing radical.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 212 insertions, 251 deletions

diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c
index 89d2cb348271..5a54976e6a28 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc.c
@@ -13,44 +13,6 @@
 #define ENETC_MAX_SKB_FRAGS	13
 #define ENETC_TXBDS_MAX_NEEDED	ENETC_TXBDS_NEEDED(ENETC_MAX_SKB_FRAGS + 1)
 
-static int enetc_map_tx_buffs(struct enetc_bdr *tx_ring, struct sk_buff *skb,
-			      int active_offloads);
-
-netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev)
-{
-	struct enetc_ndev_priv *priv = netdev_priv(ndev);
-	struct enetc_bdr *tx_ring;
-	int count;
-
-	tx_ring = priv->tx_ring[skb->queue_mapping];
-
-	if (unlikely(skb_shinfo(skb)->nr_frags > ENETC_MAX_SKB_FRAGS))
-		if (unlikely(skb_linearize(skb)))
-			goto drop_packet_err;
-
-	count = skb_shinfo(skb)->nr_frags + 1; /* fragments + head */
-	if (enetc_bd_unused(tx_ring) < ENETC_TXBDS_NEEDED(count)) {
-		netif_stop_subqueue(ndev, tx_ring->index);
-		return NETDEV_TX_BUSY;
-	}
-
-	enetc_lock_mdio();
-	count = enetc_map_tx_buffs(tx_ring, skb, priv->active_offloads);
-	enetc_unlock_mdio();
-
-	if (unlikely(!count))
-		goto drop_packet_err;
-
-	if (enetc_bd_unused(tx_ring) < ENETC_TXBDS_MAX_NEEDED)
-		netif_stop_subqueue(ndev, tx_ring->index);
-
-	return NETDEV_TX_OK;
-
-drop_packet_err:
-	dev_kfree_skb_any(skb);
-	return NETDEV_TX_OK;
-}
-
 static void enetc_unmap_tx_buff(struct enetc_bdr *tx_ring,
 				struct enetc_tx_swbd *tx_swbd)
 {
@@ -221,6 +183,41 @@ dma_err:
 	return 0;
 }
 
+netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct enetc_bdr *tx_ring;
+	int count;
+
+	tx_ring = priv->tx_ring[skb->queue_mapping];
+
+	if (unlikely(skb_shinfo(skb)->nr_frags > ENETC_MAX_SKB_FRAGS))
+		if (unlikely(skb_linearize(skb)))
+			goto drop_packet_err;
+
+	count = skb_shinfo(skb)->nr_frags + 1; /* fragments + head */
+	if (enetc_bd_unused(tx_ring) < ENETC_TXBDS_NEEDED(count)) {
+		netif_stop_subqueue(ndev, tx_ring->index);
+		return NETDEV_TX_BUSY;
+	}
+
+	enetc_lock_mdio();
+	count = enetc_map_tx_buffs(tx_ring, skb, priv->active_offloads);
+	enetc_unlock_mdio();
+
+	if (unlikely(!count))
+		goto drop_packet_err;
+
+	if (enetc_bd_unused(tx_ring) < ENETC_TXBDS_MAX_NEEDED)
+		netif_stop_subqueue(ndev, tx_ring->index);
+
+	return NETDEV_TX_OK;
+
+drop_packet_err:
+	dev_kfree_skb_any(skb);
+	return NETDEV_TX_OK;
+}
+
 static irqreturn_t enetc_msix(int irq, void *data)
 {
 	struct enetc_int_vector	*v = data;
@@ -242,10 +239,6 @@ static irqreturn_t enetc_msix(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static bool enetc_clean_tx_ring(struct enetc_bdr *tx_ring, int napi_budget);
-static int enetc_clean_rx_ring(struct enetc_bdr *rx_ring,
-			       struct napi_struct *napi, int work_limit);
-
 static void enetc_rx_dim_work(struct work_struct *w)
 {
 	struct dim *dim = container_of(w, struct dim, work);
@@ -274,50 +267,6 @@ static void enetc_rx_net_dim(struct enetc_int_vector *v)
 	net_dim(&v->rx_dim, dim_sample);
 }
 
-static int enetc_poll(struct napi_struct *napi, int budget)
-{
-	struct enetc_int_vector
-		*v = container_of(napi, struct enetc_int_vector, napi);
-	bool complete = true;
-	int work_done;
-	int i;
-
-	enetc_lock_mdio();
-
-	for (i = 0; i < v->count_tx_rings; i++)
-		if (!enetc_clean_tx_ring(&v->tx_ring[i], budget))
-			complete = false;
-
-	work_done = enetc_clean_rx_ring(&v->rx_ring, napi, budget);
-	if (work_done == budget)
-		complete = false;
-	if (work_done)
-		v->rx_napi_work = true;
-
-	if (!complete) {
-		enetc_unlock_mdio();
-		return budget;
-	}
-
-	napi_complete_done(napi, work_done);
-
-	if (likely(v->rx_dim_en))
-		enetc_rx_net_dim(v);
-
-	v->rx_napi_work = false;
-
-	/* enable interrupts */
-	enetc_wr_reg_hot(v->rbier, ENETC_RBIER_RXTIE);
-
-	for_each_set_bit(i, &v->tx_rings_map, ENETC_MAX_NUM_TXQS)
-		enetc_wr_reg_hot(v->tbier_base + ENETC_BDR_OFF(i),
-				 ENETC_TBIER_TXTIE);
-
-	enetc_unlock_mdio();
-
-	return work_done;
-}
-
 static int enetc_bd_ready_count(struct enetc_bdr *tx_ring, int ci)
 {
 	int pi = enetc_rd_reg_hot(tx_ring->tcir) & ENETC_TBCIR_IDX_MASK;
@@ -479,18 +428,16 @@ static int enetc_refill_rx_ring(struct enetc_bdr *rx_ring, const int buff_cnt)
 		/* clear 'R" as well */
 		rxbd->r.lstatus = 0;
 
-		rxbd = enetc_rxbd_next(rx_ring, rxbd, i);
-		rx_swbd++;
-		i++;
-		if (unlikely(i == rx_ring->bd_count)) {
-			i = 0;
-			rx_swbd = rx_ring->rx_swbd;
-		}
+		enetc_rxbd_next(rx_ring, &rxbd, &i);
+		rx_swbd = &rx_ring->rx_swbd[i];
 	}
 
 	if (likely(j)) {
 		rx_ring->next_to_alloc = i; /* keep track from page reuse */
 		rx_ring->next_to_use = i;
+
+		/* update ENETC's consumer index */
+		enetc_wr_reg_hot(rx_ring->rcir, rx_ring->next_to_use);
 	}
 
 	return j;
@@ -676,13 +623,9 @@ static int enetc_clean_rx_ring(struct enetc_bdr *rx_ring,
 		u32 bd_status;
 		u16 size;
 
-		if (cleaned_cnt >= ENETC_RXBD_BUNDLE) {
-			int count = enetc_refill_rx_ring(rx_ring, cleaned_cnt);
-
-			/* update ENETC's consumer index */
-			enetc_wr_reg_hot(rx_ring->rcir, rx_ring->next_to_use);
-			cleaned_cnt -= count;
-		}
+		if (cleaned_cnt >= ENETC_RXBD_BUNDLE)
+			cleaned_cnt -= enetc_refill_rx_ring(rx_ring,
+							    cleaned_cnt);
 
 		rxbd = enetc_rxbd(rx_ring, i);
 		bd_status = le32_to_cpu(rxbd->r.lstatus);
@@ -700,9 +643,7 @@ static int enetc_clean_rx_ring(struct enetc_bdr *rx_ring,
 
 		cleaned_cnt++;
 
-		rxbd = enetc_rxbd_next(rx_ring, rxbd, i);
-		if (unlikely(++i == rx_ring->bd_count))
-			i = 0;
+		enetc_rxbd_next(rx_ring, &rxbd, &i);
 
 		if (unlikely(bd_status &
 			     ENETC_RXBD_LSTATUS(ENETC_RXBD_ERR_MASK))) {
@@ -711,9 +652,7 @@ static int enetc_clean_rx_ring(struct enetc_bdr *rx_ring,
 				dma_rmb();
 				bd_status = le32_to_cpu(rxbd->r.lstatus);
 
-				rxbd = enetc_rxbd_next(rx_ring, rxbd, i);
-				if (unlikely(++i == rx_ring->bd_count))
-					i = 0;
+				enetc_rxbd_next(rx_ring, &rxbd, &i);
 			}
 
 			rx_ring->ndev->stats.rx_dropped++;
@@ -736,9 +675,7 @@ static int enetc_clean_rx_ring(struct enetc_bdr *rx_ring,
 
 			cleaned_cnt++;
 
-			rxbd = enetc_rxbd_next(rx_ring, rxbd, i);
-			if (unlikely(++i == rx_ring->bd_count))
-				i = 0;
+			enetc_rxbd_next(rx_ring, &rxbd, &i);
 		}
 
 		rx_byte_cnt += skb->len;
@@ -758,6 +695,50 @@ static int enetc_clean_rx_ring(struct enetc_bdr *rx_ring,
 	return rx_frm_cnt;
 }
 
+static int enetc_poll(struct napi_struct *napi, int budget)
+{
+	struct enetc_int_vector
+		*v = container_of(napi, struct enetc_int_vector, napi);
+	bool complete = true;
+	int work_done;
+	int i;
+
+	enetc_lock_mdio();
+
+	for (i = 0; i < v->count_tx_rings; i++)
+		if (!enetc_clean_tx_ring(&v->tx_ring[i], budget))
+			complete = false;
+
+	work_done = enetc_clean_rx_ring(&v->rx_ring, napi, budget);
+	if (work_done == budget)
+		complete = false;
+	if (work_done)
+		v->rx_napi_work = true;
+
+	if (!complete) {
+		enetc_unlock_mdio();
+		return budget;
+	}
+
+	napi_complete_done(napi, work_done);
+
+	if (likely(v->rx_dim_en))
+		enetc_rx_net_dim(v);
+
+	v->rx_napi_work = false;
+
+	/* enable interrupts */
+	enetc_wr_reg_hot(v->rbier, ENETC_RBIER_RXTIE);
+
+	for_each_set_bit(i, &v->tx_rings_map, ENETC_MAX_NUM_TXQS)
+		enetc_wr_reg_hot(v->tbier_base + ENETC_BDR_OFF(i),
+				 ENETC_TBIER_TXTIE);
+
+	enetc_unlock_mdio();
+
+	return work_done;
+}
+
 /* Probing and Init */
 #define ENETC_MAX_RFS_SIZE 64
 void enetc_get_si_caps(struct enetc_si *si)
@@ -991,60 +972,6 @@ static void enetc_free_rxtx_rings(struct enetc_ndev_priv *priv)
 		enetc_free_tx_ring(priv->tx_ring[i]);
 }
 
-int enetc_alloc_cbdr(struct device *dev, struct enetc_cbdr *cbdr)
-{
-	int size = cbdr->bd_count * sizeof(struct enetc_cbd);
-
-	cbdr->bd_base = dma_alloc_coherent(dev, size, &cbdr->bd_dma_base,
-					   GFP_KERNEL);
-	if (!cbdr->bd_base)
-		return -ENOMEM;
-
-	/* h/w requires 128B alignment */
-	if (!IS_ALIGNED(cbdr->bd_dma_base, 128)) {
-		dma_free_coherent(dev, size, cbdr->bd_base, cbdr->bd_dma_base);
-		return -EINVAL;
-	}
-
-	cbdr->next_to_clean = 0;
-	cbdr->next_to_use = 0;
-
-	return 0;
-}
-
-void enetc_free_cbdr(struct device *dev, struct enetc_cbdr *cbdr)
-{
-	int size = cbdr->bd_count * sizeof(struct enetc_cbd);
-
-	dma_free_coherent(dev, size, cbdr->bd_base, cbdr->bd_dma_base);
-	cbdr->bd_base = NULL;
-}
-
-void enetc_setup_cbdr(struct enetc_hw *hw, struct enetc_cbdr *cbdr)
-{
-	/* set CBDR cache attributes */
-	enetc_wr(hw, ENETC_SICAR2,
-		 ENETC_SICAR_RD_COHERENT | ENETC_SICAR_WR_COHERENT);
-
-	enetc_wr(hw, ENETC_SICBDRBAR0, lower_32_bits(cbdr->bd_dma_base));
-	enetc_wr(hw, ENETC_SICBDRBAR1, upper_32_bits(cbdr->bd_dma_base));
-	enetc_wr(hw, ENETC_SICBDRLENR, ENETC_RTBLENR_LEN(cbdr->bd_count));
-
-	enetc_wr(hw, ENETC_SICBDRPIR, 0);
-	enetc_wr(hw, ENETC_SICBDRCIR, 0);
-
-	/* enable ring */
-	enetc_wr(hw, ENETC_SICBDRMR, BIT(31));
-
-	cbdr->pir = hw->reg + ENETC_SICBDRPIR;
-	cbdr->cir = hw->reg + ENETC_SICBDRCIR;
-}
-
-void enetc_clear_cbdr(struct enetc_hw *hw)
-{
-	enetc_wr(hw, ENETC_SICBDRMR, 0);
-}
-
 static int enetc_setup_default_rss_table(struct enetc_si *si, int num_groups)
 {
 	int *rss_table;
@@ -1104,45 +1031,22 @@ void enetc_init_si_rings_params(struct enetc_ndev_priv *priv)
 	priv->bdr_int_num = cpus;
 	priv->ic_mode = ENETC_IC_RX_ADAPTIVE | ENETC_IC_TX_MANUAL;
 	priv->tx_ictt = ENETC_TXIC_TIMETHR;
-
-	/* SI specific */
-	si->cbd_ring.bd_count = ENETC_CBDR_DEFAULT_SIZE;
 }
 
 int enetc_alloc_si_resources(struct enetc_ndev_priv *priv)
 {
 	struct enetc_si *si = priv->si;
-	int err;
-
-	err = enetc_alloc_cbdr(priv->dev, &si->cbd_ring);
-	if (err)
-		return err;
-
-	enetc_setup_cbdr(&si->hw, &si->cbd_ring);
 
 	priv->cls_rules = kcalloc(si->num_fs_entries, sizeof(*priv->cls_rules),
 				  GFP_KERNEL);
-	if (!priv->cls_rules) {
-		err = -ENOMEM;
-		goto err_alloc_cls;
-	}
+	if (!priv->cls_rules)
+		return -ENOMEM;
 
 	return 0;
-
-err_alloc_cls:
-	enetc_clear_cbdr(&si->hw);
-	enetc_free_cbdr(priv->dev, &si->cbd_ring);
-
-	return err;
 }
 
 void enetc_free_si_resources(struct enetc_ndev_priv *priv)
 {
-	struct enetc_si *si = priv->si;
-
-	enetc_clear_cbdr(&si->hw);
-	enetc_free_cbdr(priv->dev, &si->cbd_ring);
-
 	kfree(priv->cls_rules);
 }
 
@@ -1213,9 +1117,9 @@ static void enetc_setup_rxbdr(struct enetc_hw *hw, struct enetc_bdr *rx_ring)
 	rx_ring->rcir = hw->reg + ENETC_BDR(RX, idx, ENETC_RBCIR);
 	rx_ring->idr = hw->reg + ENETC_SIRXIDR;
 
+	enetc_lock_mdio();
 	enetc_refill_rx_ring(rx_ring, enetc_bd_unused(rx_ring));
-	/* update ENETC's consumer index */
-	enetc_rxbdr_wr(hw, idx, ENETC_RBCIR, rx_ring->next_to_use);
+	enetc_unlock_mdio();
 
 	/* enable ring */
 	enetc_rxbdr_wr(hw, idx, ENETC_RBMR, rbmr);
diff --git a/drivers/net/ethernet/freescale/enetc/enetc.h b/drivers/net/ethernet/freescale/enetc/enetc.h
index 8b380fc13314..773e412b9f4e 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.h
+++ b/drivers/net/ethernet/freescale/enetc/enetc.h
@@ -98,12 +98,14 @@ struct enetc_cbdr {
 	void *bd_base; /* points to Rx or Tx BD ring */
 	void __iomem *pir;
 	void __iomem *cir;
+	void __iomem *mr; /* mode register */
 
 	int bd_count; /* # of BDs */
 	int next_to_use;
 	int next_to_clean;
 
 	dma_addr_t bd_dma_base;
+	struct device *dma_dev;
 };
 
 #define ENETC_TXBD(BDR, i) (&(((union enetc_tx_bd *)((BDR).bd_base))[i]))
@@ -119,19 +121,26 @@ static inline union enetc_rx_bd *enetc_rxbd(struct enetc_bdr *rx_ring, int i)
 	return &(((union enetc_rx_bd *)rx_ring->bd_base)[hw_idx]);
 }
 
-static inline union enetc_rx_bd *enetc_rxbd_next(struct enetc_bdr *rx_ring,
-						 union enetc_rx_bd *rxbd,
-						 int i)
+static inline void enetc_rxbd_next(struct enetc_bdr *rx_ring,
+				   union enetc_rx_bd **old_rxbd, int *old_index)
 {
-	rxbd++;
+	union enetc_rx_bd *new_rxbd = *old_rxbd;
+	int new_index = *old_index;
+
+	new_rxbd++;
+
 #ifdef CONFIG_FSL_ENETC_PTP_CLOCK
 	if (rx_ring->ext_en)
-		rxbd++;
+		new_rxbd++;
 #endif
-	if (unlikely(++i == rx_ring->bd_count))
-		rxbd = rx_ring->bd_base;
 
-	return rxbd;
+	if (unlikely(++new_index == rx_ring->bd_count)) {
+		new_rxbd = rx_ring->bd_base;
+		new_index = 0;
+	}
+
+	*old_rxbd = new_rxbd;
+	*old_index = new_index;
 }
 
 static inline union enetc_rx_bd *enetc_rxbd_ext(union enetc_rx_bd *rxbd)
@@ -252,7 +261,7 @@ struct enetc_ndev_priv {
 	u16 rx_bd_count, tx_bd_count;
 
 	u16 msg_enable;
-	int active_offloads;
+	enum enetc_active_offloads active_offloads;
 
 	u32 speed; /* store speed for compare update pspeed */
 
@@ -310,10 +319,9 @@ int enetc_setup_tc(struct net_device *ndev, enum tc_setup_type type,
 void enetc_set_ethtool_ops(struct net_device *ndev);
 
 /* control buffer descriptor ring (CBDR) */
-int enetc_alloc_cbdr(struct device *dev, struct enetc_cbdr *cbdr);
-void enetc_free_cbdr(struct device *dev, struct enetc_cbdr *cbdr);
-void enetc_setup_cbdr(struct enetc_hw *hw, struct enetc_cbdr *cbdr);
-void enetc_clear_cbdr(struct enetc_hw *hw);
+int enetc_setup_cbdr(struct device *dev, struct enetc_hw *hw, int bd_count,
+		     struct enetc_cbdr *cbdr);
+void enetc_teardown_cbdr(struct enetc_cbdr *cbdr);
 int enetc_set_mac_flt_entry(struct enetc_si *si, int index,
 			    char *mac_addr, int si_map);
 int enetc_clear_mac_flt_entry(struct enetc_si *si, int index);
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_cbdr.c b/drivers/net/ethernet/freescale/enetc/enetc_cbdr.c
index 201cbc362e33..073e56dcca4e 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_cbdr.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_cbdr.c
@@ -3,9 +3,63 @@
 
 #include "enetc.h"
 
-static void enetc_clean_cbdr(struct enetc_si *si)
+int enetc_setup_cbdr(struct device *dev, struct enetc_hw *hw, int bd_count,
+		     struct enetc_cbdr *cbdr)
+{
+	int size = bd_count * sizeof(struct enetc_cbd);
+
+	cbdr->bd_base = dma_alloc_coherent(dev, size, &cbdr->bd_dma_base,
+					   GFP_KERNEL);
+	if (!cbdr->bd_base)
+		return -ENOMEM;
+
+	/* h/w requires 128B alignment */
+	if (!IS_ALIGNED(cbdr->bd_dma_base, 128)) {
+		dma_free_coherent(dev, size, cbdr->bd_base,
+				  cbdr->bd_dma_base);
+		return -EINVAL;
+	}
+
+	cbdr->next_to_clean = 0;
+	cbdr->next_to_use = 0;
+	cbdr->dma_dev = dev;
+	cbdr->bd_count = bd_count;
+
+	cbdr->pir = hw->reg + ENETC_SICBDRPIR;
+	cbdr->cir = hw->reg + ENETC_SICBDRCIR;
+	cbdr->mr = hw->reg + ENETC_SICBDRMR;
+
+	/* set CBDR cache attributes */
+	enetc_wr(hw, ENETC_SICAR2,
+		 ENETC_SICAR_RD_COHERENT | ENETC_SICAR_WR_COHERENT);
+
+	enetc_wr(hw, ENETC_SICBDRBAR0, lower_32_bits(cbdr->bd_dma_base));
+	enetc_wr(hw, ENETC_SICBDRBAR1, upper_32_bits(cbdr->bd_dma_base));
+	enetc_wr(hw, ENETC_SICBDRLENR, ENETC_RTBLENR_LEN(cbdr->bd_count));
+
+	enetc_wr_reg(cbdr->pir, cbdr->next_to_clean);
+	enetc_wr_reg(cbdr->cir, cbdr->next_to_use);
+	/* enable ring */
+	enetc_wr_reg(cbdr->mr, BIT(31));
+
+	return 0;
+}
+
+void enetc_teardown_cbdr(struct enetc_cbdr *cbdr)
+{
+	int size = cbdr->bd_count * sizeof(struct enetc_cbd);
+
+	/* disable ring */
+	enetc_wr_reg(cbdr->mr, 0);
+
+	dma_free_coherent(cbdr->dma_dev, size, cbdr->bd_base,
+			  cbdr->bd_dma_base);
+	cbdr->bd_base = NULL;
+	cbdr->dma_dev = NULL;
+}
+
+static void enetc_clean_cbdr(struct enetc_cbdr *ring)
 {
-	struct enetc_cbdr *ring = &si->cbd_ring;
 	struct enetc_cbd *dest_cbd;
 	int i, status;
 
@@ -15,7 +69,7 @@ static void enetc_clean_cbdr(struct enetc_si *si)
 		dest_cbd = ENETC_CBD(*ring, i);
 		status = dest_cbd->status_flags & ENETC_CBD_STATUS_MASK;
 		if (status)
-			dev_warn(&si->pdev->dev, "CMD err %04x for cmd %04x\n",
+			dev_warn(ring->dma_dev, "CMD err %04x for cmd %04x\n",
 				 status, dest_cbd->cmd);
 
 		memset(dest_cbd, 0, sizeof(*dest_cbd));
@@ -43,7 +97,7 @@ int enetc_send_cmd(struct enetc_si *si, struct enetc_cbd *cbd)
 		return -EIO;
 
 	if (unlikely(!enetc_cbd_unused(ring)))
-		enetc_clean_cbdr(si);
+		enetc_clean_cbdr(ring);
 
 	i = ring->next_to_use;
 	dest_cbd = ENETC_CBD(*ring, i);
@@ -69,7 +123,7 @@ int enetc_send_cmd(struct enetc_si *si, struct enetc_cbd *cbd)
 	/* CBD may writeback data, feedback up level */
 	*cbd = *dest_cbd;
 
-	enetc_clean_cbdr(si);
+	enetc_clean_cbdr(ring);
 
 	return 0;
 }
@@ -117,6 +171,7 @@ int enetc_set_mac_flt_entry(struct enetc_si *si, int index,
 int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse,
 		       int index)
 {
+	struct enetc_cbdr *ring = &si->cbd_ring;
 	struct enetc_cbd cbd = {.cmd = 0};
 	dma_addr_t dma, dma_align;
 	void *tmp, *tmp_align;
@@ -129,10 +184,10 @@ int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse,
 	cbd.length = cpu_to_le16(sizeof(*rfse));
 	cbd.opt[3] = cpu_to_le32(0); /* SI */
 
-	tmp = dma_alloc_coherent(&si->pdev->dev, sizeof(*rfse) + RFSE_ALIGN,
+	tmp = dma_alloc_coherent(ring->dma_dev, sizeof(*rfse) + RFSE_ALIGN,
 				 &dma, GFP_KERNEL);
 	if (!tmp) {
-		dev_err(&si->pdev->dev, "DMA mapping of RFS entry failed!\n");
+		dev_err(ring->dma_dev, "DMA mapping of RFS entry failed!\n");
 		return -ENOMEM;
 	}
 
@@ -145,9 +200,9 @@ int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse,
 
 	err = enetc_send_cmd(si, &cbd);
 	if (err)
-		dev_err(&si->pdev->dev, "FS entry add failed (%d)!", err);
+		dev_err(ring->dma_dev, "FS entry add failed (%d)!", err);
 
-	dma_free_coherent(&si->pdev->dev, sizeof(*rfse) + RFSE_ALIGN,
+	dma_free_coherent(ring->dma_dev, sizeof(*rfse) + RFSE_ALIGN,
 			  tmp, dma);
 
 	return err;
@@ -157,6 +212,7 @@ int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse,
 static int enetc_cmd_rss_table(struct enetc_si *si, u32 *table, int count,
 			       bool read)
 {
+	struct enetc_cbdr *ring = &si->cbd_ring;
 	struct enetc_cbd cbd = {.cmd = 0};
 	dma_addr_t dma, dma_align;
 	u8 *tmp, *tmp_align;
@@ -166,10 +222,10 @@ static int enetc_cmd_rss_table(struct enetc_si *si, u32 *table, int count,
 		/* HW only takes in a full 64 entry table */
 		return -EINVAL;
 
-	tmp = dma_alloc_coherent(&si->pdev->dev, count + RSSE_ALIGN,
+	tmp = dma_alloc_coherent(ring->dma_dev, count + RSSE_ALIGN,
 				 &dma, GFP_KERNEL);
 	if (!tmp) {
-		dev_err(&si->pdev->dev, "DMA mapping of RSS table failed!\n");
+		dev_err(ring->dma_dev, "DMA mapping of RSS table failed!\n");
 		return -ENOMEM;
 	}
 	dma_align = ALIGN(dma, RSSE_ALIGN);
@@ -189,13 +245,13 @@ static int enetc_cmd_rss_table(struct enetc_si *si, u32 *table, int count,
 
 	err = enetc_send_cmd(si, &cbd);
 	if (err)
-		dev_err(&si->pdev->dev, "RSS cmd failed (%d)!", err);
+		dev_err(ring->dma_dev, "RSS cmd failed (%d)!", err);
 
 	if (read)
 		for (i = 0; i < count; i++)
 			table[i] = tmp_align[i];
 
-	dma_free_coherent(&si->pdev->dev, count + RSSE_ALIGN, tmp, dma);
+	dma_free_coherent(ring->dma_dev, count + RSSE_ALIGN, tmp, dma);
 
 	return err;
 }
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
index 224fc37a6757..c8b6110448d4 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
@@ -1081,26 +1081,6 @@ static int enetc_init_port_rss_memory(struct enetc_si *si)
 	return err;
 }
 
-static void enetc_init_unused_port(struct enetc_si *si)
-{
-	struct device *dev = &si->pdev->dev;
-	struct enetc_hw *hw = &si->hw;
-	int err;
-
-	si->cbd_ring.bd_count = ENETC_CBDR_DEFAULT_SIZE;
-	err = enetc_alloc_cbdr(dev, &si->cbd_ring);
-	if (err)
-		return;
-
-	enetc_setup_cbdr(hw, &si->cbd_ring);
-
-	enetc_init_port_rfs_memory(si);
-	enetc_init_port_rss_memory(si);
-
-	enetc_clear_cbdr(hw);
-	enetc_free_cbdr(dev, &si->cbd_ring);
-}
-
 static int enetc_pf_probe(struct pci_dev *pdev,
 			  const struct pci_device_id *ent)
 {
@@ -1124,8 +1104,24 @@ static int enetc_pf_probe(struct pci_dev *pdev,
 		goto err_map_pf_space;
 	}
 
+	err = enetc_setup_cbdr(&pdev->dev, &si->hw, ENETC_CBDR_DEFAULT_SIZE,
+			       &si->cbd_ring);
+	if (err)
+		goto err_setup_cbdr;
+
+	err = enetc_init_port_rfs_memory(si);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to initialize RFS memory\n");
+		goto err_init_port_rfs;
+	}
+
+	err = enetc_init_port_rss_memory(si);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to initialize RSS memory\n");
+		goto err_init_port_rss;
+	}
+
 	if (node && !of_device_is_available(node)) {
-		enetc_init_unused_port(si);
 		dev_info(&pdev->dev, "device is disabled, skipping\n");
 		err = -ENODEV;
 		goto err_device_disabled;
@@ -1158,18 +1154,6 @@ static int enetc_pf_probe(struct pci_dev *pdev,
 		goto err_alloc_si_res;
 	}
 
-	err = enetc_init_port_rfs_memory(si);
-	if (err) {
-		dev_err(&pdev->dev, "Failed to initialize RFS memory\n");
-		goto err_init_port_rfs;
-	}
-
-	err = enetc_init_port_rss_memory(si);
-	if (err) {
-		dev_err(&pdev->dev, "Failed to initialize RSS memory\n");
-		goto err_init_port_rss;
-	}
-
 	err = enetc_configure_si(priv);
 	if (err) {
 		dev_err(&pdev->dev, "Failed to configure SI\n");
@@ -1205,15 +1189,17 @@ err_phylink_create:
 err_mdiobus_create:
 	enetc_free_msix(priv);
 err_config_si:
-err_init_port_rss:
-err_init_port_rfs:
 err_alloc_msix:
 	enetc_free_si_resources(priv);
 err_alloc_si_res:
 	si->ndev = NULL;
 	free_netdev(ndev);
 err_alloc_netdev:
+err_init_port_rss:
+err_init_port_rfs:
 err_device_disabled:
+	enetc_teardown_cbdr(&si->cbd_ring);
+err_setup_cbdr:
 err_map_pf_space:
 	enetc_pci_remove(pdev);
 
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_vf.c b/drivers/net/ethernet/freescale/enetc/enetc_vf.c
index 9b755a84c2d6..371a34d3c6b4 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_vf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_vf.c
@@ -165,6 +165,11 @@ static int enetc_vf_probe(struct pci_dev *pdev,
 
 	enetc_init_si_rings_params(priv);
 
+	err = enetc_setup_cbdr(priv->dev, &si->hw, ENETC_CBDR_DEFAULT_SIZE,
+			       &si->cbd_ring);
+	if (err)
+		goto err_setup_cbdr;
+
 	err = enetc_alloc_si_resources(priv);
 	if (err) {
 		dev_err(&pdev->dev, "SI resource alloc failed\n");
@@ -197,6 +202,8 @@ err_config_si:
 err_alloc_msix:
 	enetc_free_si_resources(priv);
 err_alloc_si_res:
+	enetc_teardown_cbdr(&si->cbd_ring);
+err_setup_cbdr:
 	si->ndev = NULL;
 	free_netdev(ndev);
 err_alloc_netdev: