enetc: Introduce basic PF and VF ENETC ethernet drivers

ENETC is a multi-port virtualized Ethernet controller supporting GbE
designs and Time-Sensitive Networking (TSN) functionality.
ENETC is operating as an SR-IOV multi-PF capable Root Complex Integrated
Endpoint (RCIE).  As such, it contains multiple physical (PF) and
virtual (VF) PCIe functions, discoverable by standard PCI Express.

Introduce basic PF and VF ENETC ethernet drivers.  The PF has access to
the ENETC Port registers and resources and makes the required privileged
configurations for the underlying VF devices.  Common functionality is
controlled through so called System Interface (SI) register blocks, PFs
and VFs own a SI each.  Though SI register blocks are almost identical,
there are a few privileged SI level controls that are accessible only to
PFs, and so the distinction is made between PF SIs (PSI) and VF SIs (VSI).
As such, the bulk of the code, including datapath processing, basic h/w
offload support and generic pci related configuration, is shared between
the 2 drivers and is factored out in common source files (i.e. enetc.c).

Major functionalities included (for both drivers):
MSI-X support for Rx and Tx processing, assignment of Rx/Tx BD ring pairs
to MSI-X entries, multi-queue support, Rx S/G (Rx frame fragmentation) and
jumbo frame (up to 9600B) support, Rx paged allocation and reuse, Tx S/G
support (NETIF_F_SG), Rx and Tx checksum offload, PF MAC filtering and
initial control ring support, VLAN extraction/ insertion, PF Rx VLAN
CTAG filtering, VF mac address config support, VF VLAN isolation support,
etc.
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -6023,6 +6023,12 @@ L:	linuxppc-dev@lists.ozlabs.org
 S:	Maintained
 F:	drivers/dma/fsldma.*
 
+FREESCALE ENETC ETHERNET DRIVERS
+M:	Claudiu Manoil <claudiu.manoil@nxp.com>
+L:	netdev@vger.kernel.org
+S:	Maintained
+F:	drivers/net/ethernet/freescale/enetc/
+
 FREESCALE eTSEC ETHERNET DRIVER (GIANFAR)
 M:	Claudiu Manoil <claudiu.manoil@nxp.com>
 L:	netdev@vger.kernel.org

drivers/net/ethernet/freescale/Kconfig

@@ -97,5 +97,6 @@ config GIANFAR
 
 source "drivers/net/ethernet/freescale/dpaa/Kconfig"
 source "drivers/net/ethernet/freescale/dpaa2/Kconfig"
+source "drivers/net/ethernet/freescale/enetc/Kconfig"
 
 endif # NET_VENDOR_FREESCALE

drivers/net/ethernet/freescale/Makefile

@@ -23,3 +23,6 @@ obj-$(CONFIG_FSL_FMAN) += fman/
 obj-$(CONFIG_FSL_DPAA_ETH) += dpaa/
 
 obj-$(CONFIG_FSL_DPAA2_ETH) += dpaa2/
+
+obj-$(CONFIG_FSL_ENETC) += enetc/
+obj-$(CONFIG_FSL_ENETC_VF) += enetc/

drivers/net/ethernet/freescale/enetc/Kconfig

+# SPDX-License-Identifier: GPL-2.0
+config FSL_ENETC
+	tristate "ENETC PF driver"
+	depends on PCI && PCI_MSI && (ARCH_LAYERSCAPE || COMPILE_TEST)
+	help
+	  This driver supports NXP ENETC gigabit ethernet controller PCIe
+	  physical function (PF) devices, managing ENETC Ports at a privileged
+	  level.
+
+	  If compiled as module (M), the module name is fsl-enetc.
+
+config FSL_ENETC_VF
+	tristate "ENETC VF driver"
+	depends on PCI && PCI_MSI && (ARCH_LAYERSCAPE || COMPILE_TEST)
+	help
+	  This driver supports NXP ENETC gigabit ethernet controller PCIe
+	  virtual function (VF) devices enabled by the ENETC PF driver.
+
+	  If compiled as module (M), the module name is fsl-enetc-vf.

drivers/net/ethernet/freescale/enetc/Makefile

+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_FSL_ENETC) += fsl-enetc.o
+fsl-enetc-$(CONFIG_FSL_ENETC) += enetc.o enetc_cbdr.o enetc_ethtool.o
+fsl-enetc-objs := enetc_pf.o $(fsl-enetc-y)
+
+obj-$(CONFIG_FSL_ENETC_VF) += fsl-enetc-vf.o
+
+ifeq ($(CONFIG_FSL_ENETC)$(CONFIG_FSL_ENETC_VF), yy)
+fsl-enetc-vf-objs := enetc_vf.o
+else
+fsl-enetc-vf-$(CONFIG_FSL_ENETC_VF) += enetc.o enetc_cbdr.o \
+				       enetc_ethtool.o
+fsl-enetc-vf-objs := enetc_vf.o $(fsl-enetc-vf-y)
+endif

drivers/net/ethernet/freescale/enetc/enetc.c

+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/* Copyright 2017-2019 NXP */
+
+#include "enetc.h"
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/of_mdio.h>
+
+/* ENETC overhead: optional extension BD + 1 BD gap */
+#define ENETC_TXBDS_NEEDED(val)	((val) + 2)
+/* max # of chained Tx BDs is 15, including head and extension BD */
+#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);
+
+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;
+	}
+
+	count = enetc_map_tx_buffs(tx_ring, skb);
+	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 bool enetc_tx_csum(struct sk_buff *skb, union enetc_tx_bd *txbd)
+{
+	int l3_start, l3_hsize;
+	u16 l3_flags, l4_flags;
+
+	if (skb->ip_summed != CHECKSUM_PARTIAL)
+		return false;
+
+	switch (skb->csum_offset) {
+	case offsetof(struct tcphdr, check):
+		l4_flags = ENETC_TXBD_L4_TCP;
+		break;
+	case offsetof(struct udphdr, check):
+		l4_flags = ENETC_TXBD_L4_UDP;
+		break;
+	default:
+		skb_checksum_help(skb);
+		return false;
+	}
+
+	l3_start = skb_network_offset(skb);
+	l3_hsize = skb_network_header_len(skb);
+
+	l3_flags = 0;
+	if (skb->protocol == htons(ETH_P_IPV6))
+		l3_flags = ENETC_TXBD_L3_IPV6;
+
+	/* write BD fields */
+	txbd->l3_csoff = enetc_txbd_l3_csoff(l3_start, l3_hsize, l3_flags);
+	txbd->l4_csoff = l4_flags;
+
+	return true;
+}
+
+static void enetc_unmap_tx_buff(struct enetc_bdr *tx_ring,
+				struct enetc_tx_swbd *tx_swbd)
+{
+	if (tx_swbd->is_dma_page)
+		dma_unmap_page(tx_ring->dev, tx_swbd->dma,
+			       tx_swbd->len, DMA_TO_DEVICE);
+	else
+		dma_unmap_single(tx_ring->dev, tx_swbd->dma,
+				 tx_swbd->len, DMA_TO_DEVICE);
+	tx_swbd->dma = 0;
+}
+
+static void enetc_free_tx_skb(struct enetc_bdr *tx_ring,
+			      struct enetc_tx_swbd *tx_swbd)
+{
+	if (tx_swbd->dma)
+		enetc_unmap_tx_buff(tx_ring, tx_swbd);
+
+	if (tx_swbd->skb) {
+		dev_kfree_skb_any(tx_swbd->skb);
+		tx_swbd->skb = NULL;
+	}
+}
+
+static int enetc_map_tx_buffs(struct enetc_bdr *tx_ring, struct sk_buff *skb)
+{
+	struct enetc_tx_swbd *tx_swbd;
+	struct skb_frag_struct *frag;
+	int len = skb_headlen(skb);
+	union enetc_tx_bd temp_bd;
+	union enetc_tx_bd *txbd;
+	bool do_vlan, do_tstamp;
+	int i, count = 0;
+	unsigned int f;
+	dma_addr_t dma;
+	u8 flags = 0;
+
+	i = tx_ring->next_to_use;
+	txbd = ENETC_TXBD(*tx_ring, i);
+	prefetchw(txbd);
+
+	dma = dma_map_single(tx_ring->dev, skb->data, len, DMA_TO_DEVICE);
+	if (unlikely(dma_mapping_error(tx_ring->dev, dma)))
+		goto dma_err;
+
+	temp_bd.addr = cpu_to_le64(dma);
+	temp_bd.buf_len = cpu_to_le16(len);
+	temp_bd.lstatus = 0;
+
+	tx_swbd = &tx_ring->tx_swbd[i];
+	tx_swbd->dma = dma;
+	tx_swbd->len = len;
+	tx_swbd->is_dma_page = 0;
+	count++;
+
+	do_vlan = skb_vlan_tag_present(skb);
+	do_tstamp = skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP;
+
+	if (do_vlan || do_tstamp)
+		flags |= ENETC_TXBD_FLAGS_EX;
+
+	if (enetc_tx_csum(skb, &temp_bd))
+		flags |= ENETC_TXBD_FLAGS_CSUM | ENETC_TXBD_FLAGS_L4CS;
+
+	/* first BD needs frm_len and offload flags set */
+	temp_bd.frm_len = cpu_to_le16(skb->len);
+	temp_bd.flags = flags;
+
+	if (flags & ENETC_TXBD_FLAGS_EX) {
+		u8 e_flags = 0;
+		*txbd = temp_bd;
+		enetc_clear_tx_bd(&temp_bd);
+
+		/* add extension BD for VLAN and/or timestamping */
+		flags = 0;
+		tx_swbd++;
+		txbd++;
+		i++;
+		if (unlikely(i == tx_ring->bd_count)) {
+			i = 0;
+			tx_swbd = tx_ring->tx_swbd;
+			txbd = ENETC_TXBD(*tx_ring, 0);
+		}
+		prefetchw(txbd);
+
+		if (do_vlan) {
+			temp_bd.ext.vid = cpu_to_le16(skb_vlan_tag_get(skb));
+			temp_bd.ext.tpid = 0; /* < C-TAG */
+			e_flags |= ENETC_TXBD_E_FLAGS_VLAN_INS;
+		}
+
+		if (do_tstamp) {
+			skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+			e_flags |= ENETC_TXBD_E_FLAGS_TWO_STEP_PTP;
+		}
+
+		temp_bd.ext.e_flags = e_flags;
+		count++;
+	}
+
+	frag = &skb_shinfo(skb)->frags[0];
+	for (f = 0; f < skb_shinfo(skb)->nr_frags; f++, frag++) {
+		len = skb_frag_size(frag);
+		dma = skb_frag_dma_map(tx_ring->dev, frag, 0, len,
+				       DMA_TO_DEVICE);
+		if (dma_mapping_error(tx_ring->dev, dma))
+			goto dma_err;
+
+		*txbd = temp_bd;
+		enetc_clear_tx_bd(&temp_bd);
+
+		flags = 0;
+		tx_swbd++;
+		txbd++;
+		i++;
+		if (unlikely(i == tx_ring->bd_count)) {
+			i = 0;
+			tx_swbd = tx_ring->tx_swbd;
+			txbd = ENETC_TXBD(*tx_ring, 0);
+		}
+		prefetchw(txbd);
+
+		temp_bd.addr = cpu_to_le64(dma);
+		temp_bd.buf_len = cpu_to_le16(len);
+
+		tx_swbd->dma = dma;
+		tx_swbd->len = len;
+		tx_swbd->is_dma_page = 1;
+		count++;
+	}
+
+	/* last BD needs 'F' bit set */
+	flags |= ENETC_TXBD_FLAGS_F;
+	temp_bd.flags = flags;
+	*txbd = temp_bd;
+
+	tx_ring->tx_swbd[i].skb = skb;
+
+	enetc_bdr_idx_inc(tx_ring, &i);
+	tx_ring->next_to_use = i;
+
+	/* let H/W know BD ring has been updated */
+	enetc_wr_reg(tx_ring->tpir, i); /* includes wmb() */
+
+	return count;
+
+dma_err:
+	dev_err(tx_ring->dev, "DMA map error");
+
+	do {
+		tx_swbd = &tx_ring->tx_swbd[i];
+		enetc_free_tx_skb(tx_ring, tx_swbd);
+		if (i == 0)
+			i = tx_ring->bd_count;
+		i--;
+	} while (count--);
+
+	return 0;
+}
+
+static irqreturn_t enetc_msix(int irq, void *data)
+{
+	struct enetc_int_vector	*v = data;
+	int i;
+
+	/* disable interrupts */
+	enetc_wr_reg(v->rbier, 0);
+
+	for_each_set_bit(i, &v->tx_rings_map, v->count_tx_rings)
+		enetc_wr_reg(v->tbier_base + ENETC_BDR_OFF(i), 0);
+
+	napi_schedule_irqoff(&v->napi);
+
+	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 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;
+
+	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 (!complete)
+		return budget;
+
+	napi_complete_done(napi, work_done);
+
+	/* enable interrupts */
+	enetc_wr_reg(v->rbier, ENETC_RBIER_RXTIE);
+
+	for_each_set_bit(i, &v->tx_rings_map, v->count_tx_rings)
+		enetc_wr_reg(v->tbier_base + ENETC_BDR_OFF(i),
+			     ENETC_TBIER_TXTIE);
+
+	return work_done;
+}
+
+static int enetc_bd_ready_count(struct enetc_bdr *tx_ring, int ci)
+{
+	int pi = enetc_rd_reg(tx_ring->tcir) & ENETC_TBCIR_IDX_MASK;
+
+	return pi >= ci ? pi - ci : tx_ring->bd_count - ci + pi;
+}
+
+static bool enetc_clean_tx_ring(struct enetc_bdr *tx_ring, int napi_budget)
+{
+	struct net_device *ndev = tx_ring->ndev;
+	int tx_frm_cnt = 0, tx_byte_cnt = 0;
+	struct enetc_tx_swbd *tx_swbd;
+	int i, bds_to_clean;
+
+	i = tx_ring->next_to_clean;
+	tx_swbd = &tx_ring->tx_swbd[i];
+	bds_to_clean = enetc_bd_ready_count(tx_ring, i);
+
+	while (bds_to_clean && tx_frm_cnt < ENETC_DEFAULT_TX_WORK) {
+		bool is_eof = !!tx_swbd->skb;
+
+		enetc_unmap_tx_buff(tx_ring, tx_swbd);
+		if (is_eof) {
+			napi_consume_skb(tx_swbd->skb, napi_budget);
+			tx_swbd->skb = NULL;
+		}
+
+		tx_byte_cnt += tx_swbd->len;
+
+		bds_to_clean--;
+		tx_swbd++;
+		i++;
+		if (unlikely(i == tx_ring->bd_count)) {
+			i = 0;
+			tx_swbd = tx_ring->tx_swbd;
+		}
+
+		/* BD iteration loop end */
+		if (is_eof) {
+			tx_frm_cnt++;
+			/* re-arm interrupt source */
+			enetc_wr_reg(tx_ring->idr, BIT(tx_ring->index) |
+				     BIT(16 + tx_ring->index));
+		}
+
+		if (unlikely(!bds_to_clean))
+			bds_to_clean = enetc_bd_ready_count(tx_ring, i);
+	}
+
+	tx_ring->next_to_clean = i;
+	tx_ring->stats.packets += tx_frm_cnt;
+	tx_ring->stats.bytes += tx_byte_cnt;
+
+	if (unlikely(tx_frm_cnt && netif_carrier_ok(ndev) &&
+		     __netif_subqueue_stopped(ndev, tx_ring->index) &&
+		     (enetc_bd_unused(tx_ring) >= ENETC_TXBDS_MAX_NEEDED))) {
+		netif_wake_subqueue(ndev, tx_ring->index);
+	}
+
+	return tx_frm_cnt != ENETC_DEFAULT_TX_WORK;
+}
+
+static bool enetc_new_page(struct enetc_bdr *rx_ring,
+			   struct enetc_rx_swbd *rx_swbd)
+{
+	struct page *page;
+	dma_addr_t addr;
+
+	page = dev_alloc_page();
+	if (unlikely(!page))
+		return false;
+
+	addr = dma_map_page(rx_ring->dev, page, 0, PAGE_SIZE, DMA_FROM_DEVICE);
+	if (unlikely(dma_mapping_error(rx_ring->dev, addr))) {
+		__free_page(page);
+
+		return false;
+	}
+
+	rx_swbd->dma = addr;
+	rx_swbd->page = page;
+	rx_swbd->page_offset = ENETC_RXB_PAD;
+
+	return true;
+}
+
+static int enetc_refill_rx_ring(struct enetc_bdr *rx_ring, const int buff_cnt)
+{
+	struct enetc_rx_swbd *rx_swbd;
+	union enetc_rx_bd *rxbd;
+	int i, j;
+
+	i = rx_ring->next_to_use;
+	rx_swbd = &rx_ring->rx_swbd[i];
+	rxbd = ENETC_RXBD(*rx_ring, i);
+
+	for (j = 0; j < buff_cnt; j++) {
+		/* try reuse page */
+		if (unlikely(!rx_swbd->page)) {
+			if (unlikely(!enetc_new_page(rx_ring, rx_swbd))) {
+				rx_ring->stats.rx_alloc_errs++;
+				break;
+			}
+		}
+
+		/* update RxBD */
+		rxbd->w.addr = cpu_to_le64(rx_swbd->dma +
+					   rx_swbd->page_offset);
+		/* clear 'R" as well */
+		rxbd->r.lstatus = 0;
+
+		rx_swbd++;
+		rxbd++;
+		i++;
+		if (unlikely(i == rx_ring->bd_count)) {
+			i = 0;
+			rx_swbd = rx_ring->rx_swbd;
+			rxbd = ENETC_RXBD(*rx_ring, 0);
+		}
+	}
+
+	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(rx_ring->rcir, i);
+	}
+
+	return j;
+}
+
+static void enetc_get_offloads(struct enetc_bdr *rx_ring,
+			       union enetc_rx_bd *rxbd, struct sk_buff *skb)
+{
+	/* TODO: add tstamp, hashing */
+	if (rx_ring->ndev->features & NETIF_F_RXCSUM) {
+		u16 inet_csum = le16_to_cpu(rxbd->r.inet_csum);
+
+		skb->csum = csum_unfold((__force __sum16)~htons(inet_csum));
+		skb->ip_summed = CHECKSUM_COMPLETE;
+	}
+
+	/* copy VLAN to skb, if one is extracted, for now we assume it's a
+	 * standard TPID, but HW also supports custom values
+	 */
+	if (le16_to_cpu(rxbd->r.flags) & ENETC_RXBD_FLAG_VLAN)
+		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
+				       le16_to_cpu(rxbd->r.vlan_opt));
+}
+
+static void enetc_process_skb(struct enetc_bdr *rx_ring,
+			      struct sk_buff *skb)
+{
+	skb_record_rx_queue(skb, rx_ring->index);
+	skb->protocol = eth_type_trans(skb, rx_ring->ndev);
+}
+
+static bool enetc_page_reusable(struct page *page)
+{
+	return (!page_is_pfmemalloc(page) && page_ref_count(page) == 1);
+}
+
+static void enetc_reuse_page(struct enetc_bdr *rx_ring,
+			     struct enetc_rx_swbd *old)
+{
+	struct enetc_rx_swbd *new;
+
+	new = &rx_ring->rx_swbd[rx_ring->next_to_alloc];
+
+	/* next buf that may reuse a page */
+	enetc_bdr_idx_inc(rx_ring, &rx_ring->next_to_alloc);
+
+	/* copy page reference */
+	*new = *old;
+}
+
+static struct enetc_rx_swbd *enetc_get_rx_buff(struct enetc_bdr *rx_ring,
+					       int i, u16 size)
+{
+	struct enetc_rx_swbd *rx_swbd = &rx_ring->rx_swbd[i];
+
+	dma_sync_single_range_for_cpu(rx_ring->dev, rx_swbd->dma,
+				      rx_swbd->page_offset,
+				      size, DMA_FROM_DEVICE);
+	return rx_swbd;
+}
+
+static void enetc_put_rx_buff(struct enetc_bdr *rx_ring,
+			      struct enetc_rx_swbd *rx_swbd)
+{
+	if (likely(enetc_page_reusable(rx_swbd->page))) {
+		rx_swbd->page_offset ^= ENETC_RXB_TRUESIZE;
+		page_ref_inc(rx_swbd->page);
+
+		enetc_reuse_page(rx_ring, rx_swbd);
+
+		/* sync for use by the device */
+		dma_sync_single_range_for_device(rx_ring->dev, rx_swbd->dma,
+						 rx_swbd->page_offset,
+						 ENETC_RXB_DMA_SIZE,
+						 DMA_FROM_DEVICE);
+	} else {
+		dma_unmap_page(rx_ring->dev, rx_swbd->dma,
+			       PAGE_SIZE, DMA_FROM_DEVICE);
+	}
+
+	rx_swbd->page = NULL;
+}
+
+static struct sk_buff *enetc_map_rx_buff_to_skb(struct enetc_bdr *rx_ring,
+						int i, u16 size)
+{
+	struct enetc_rx_swbd *rx_swbd = enetc_get_rx_buff(rx_ring, i, size);
+	struct sk_buff *skb;
+	void *ba;
+
+	ba = page_address(rx_swbd->page) + rx_swbd->page_offset;
+	skb = build_skb(ba - ENETC_RXB_PAD, ENETC_RXB_TRUESIZE);
+	if (unlikely(!skb)) {
+		rx_ring->stats.rx_alloc_errs++;
+		return NULL;
+	}
+
+	skb_reserve(skb, ENETC_RXB_PAD);
+	__skb_put(skb, size);
+
+	enetc_put_rx_buff(rx_ring, rx_swbd);
+
+	return skb;
+}
+
+static void enetc_add_rx_buff_to_skb(struct enetc_bdr *rx_ring, int i,
+				     u16 size, struct sk_buff *skb)
+{
+	struct enetc_rx_swbd *rx_swbd = enetc_get_rx_buff(rx_ring, i, size);
+
+	skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_swbd->page,
+			rx_swbd->page_offset, size, ENETC_RXB_TRUESIZE);
+
+	enetc_put_rx_buff(rx_ring, rx_swbd);
+}
+
+#define ENETC_RXBD_BUNDLE 16 /* # of BDs to update at once */
+
+static int enetc_clean_rx_ring(struct enetc_bdr *rx_ring,
+			       struct napi_struct *napi, int work_limit)
+{
+	int rx_frm_cnt = 0, rx_byte_cnt = 0;
+	int cleaned_cnt, i;
+
+	cleaned_cnt = enetc_bd_unused(rx_ring);
+	/* next descriptor to process */
+	i = rx_ring->next_to_clean;
+
+	while (likely(rx_frm_cnt < work_limit)) {
+		union enetc_rx_bd *rxbd;
+		struct sk_buff *skb;
+		u32 bd_status;
+		u16 size;
+
+		if (cleaned_cnt >= ENETC_RXBD_BUNDLE) {
+			int count = enetc_refill_rx_ring(rx_ring, cleaned_cnt);
+
+			cleaned_cnt -= count;
+		}
+
+		rxbd = ENETC_RXBD(*rx_ring, i);
+		bd_status = le32_to_cpu(rxbd->r.lstatus);
+		if (!bd_status)
+			break;
+
+		enetc_wr_reg(rx_ring->idr, BIT(rx_ring->index));
+		dma_rmb(); /* for reading other rxbd fields */
+		size = le16_to_cpu(rxbd->r.buf_len);
+		skb = enetc_map_rx_buff_to_skb(rx_ring, i, size);
+		if (!skb)
+			break;
+
+		enetc_get_offloads(rx_ring, rxbd, skb);
+
+		cleaned_cnt++;
+		rxbd++;
+		i++;
+		if (unlikely(i == rx_ring->bd_count)) {
+			i = 0;
+			rxbd = ENETC_RXBD(*rx_ring, 0);
+		}
+
+		if (unlikely(bd_status &
+			     ENETC_RXBD_LSTATUS(ENETC_RXBD_ERR_MASK))) {
+			dev_kfree_skb(skb);
+			while (!(bd_status & ENETC_RXBD_LSTATUS_F)) {
+				dma_rmb();
+				bd_status = le32_to_cpu(rxbd->r.lstatus);
+				rxbd++;
+				i++;
+				if (unlikely(i == rx_ring->bd_count)) {
+					i = 0;
+					rxbd = ENETC_RXBD(*rx_ring, 0);
+				}
+			}
+
+			rx_ring->ndev->stats.rx_dropped++;
+			rx_ring->ndev->stats.rx_errors++;
+
+			break;
+		}
+
+		/* not last BD in frame? */
+		while (!(bd_status & ENETC_RXBD_LSTATUS_F)) {
+			bd_status = le32_to_cpu(rxbd->r.lstatus);
+			size = ENETC_RXB_DMA_SIZE;
+
+			if (bd_status & ENETC_RXBD_LSTATUS_F) {
+				dma_rmb();
+				size = le16_to_cpu(rxbd->r.buf_len);
+			}
+
+			enetc_add_rx_buff_to_skb(rx_ring, i, size, skb);
+
+			cleaned_cnt++;
+			rxbd++;
+			i++;
+			if (unlikely(i == rx_ring->bd_count)) {
+				i = 0;
+				rxbd = ENETC_RXBD(*rx_ring, 0);
+			}
+		}
+
+		rx_byte_cnt += skb->len;
+
+		enetc_process_skb(rx_ring, skb);
+
+		napi_gro_receive(napi, skb);
+
+		rx_frm_cnt++;
+	}
+
+	rx_ring->next_to_clean = i;
+
+	rx_ring->stats.packets += rx_frm_cnt;
+	rx_ring->stats.bytes += rx_byte_cnt;
+
+	return rx_frm_cnt;
+}
+
+/* Probing and Init */
+void enetc_get_si_caps(struct enetc_si *si)
+{
+	struct enetc_hw *hw = &si->hw;
+	u32 val;
+
+	/* find out how many of various resources we have to work with */
+	val = enetc_rd(hw, ENETC_SICAPR0);
+	si->num_rx_rings = (val >> 16) & 0xff;
+	si->num_tx_rings = val & 0xff;
+}
+
+static int enetc_dma_alloc_bdr(struct enetc_bdr *r, size_t bd_size)
+{
+	r->bd_base = dma_alloc_coherent(r->dev, r->bd_count * bd_size,
+					&r->bd_dma_base, GFP_KERNEL);
+	if (!r->bd_base)
+		return -ENOMEM;
+
+	/* h/w requires 128B alignment */
+	if (!IS_ALIGNED(r->bd_dma_base, 128)) {
+		dma_free_coherent(r->dev, r->bd_count * bd_size, r->bd_base,
+				  r->bd_dma_base);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int enetc_alloc_txbdr(struct enetc_bdr *txr)
+{
+	int err;
+
+	txr->tx_swbd = vzalloc(txr->bd_count * sizeof(struct enetc_tx_swbd));
+	if (!txr->tx_swbd)
+		return -ENOMEM;
+
+	err = enetc_dma_alloc_bdr(txr, sizeof(union enetc_tx_bd));
+	if (err) {
+		vfree(txr->tx_swbd);
+		return err;
+	}
+
+	txr->next_to_clean = 0;
+	txr->next_to_use = 0;
+
+	return 0;
+}
+
+static void enetc_free_txbdr(struct enetc_bdr *txr)
+{
+	int size, i;
+
+	for (i = 0; i < txr->bd_count; i++)
+		enetc_free_tx_skb(txr, &txr->tx_swbd[i]);
+
+	size = txr->bd_count * sizeof(union enetc_tx_bd);
+
+	dma_free_coherent(txr->dev, size, txr->bd_base, txr->bd_dma_base);
+	txr->bd_base = NULL;
+
+	vfree(txr->tx_swbd);
+	txr->tx_swbd = NULL;
+}
+
+static int enetc_alloc_tx_resources(struct enetc_ndev_priv *priv)
+{
+	int i, err;
+
+	for (i = 0; i < priv->num_tx_rings; i++) {
+		err = enetc_alloc_txbdr(priv->tx_ring[i]);
+
+		if (err)
+			goto fail;
+	}
+
+	return 0;
+
+fail:
+	while (i-- > 0)
+		enetc_free_txbdr(priv->tx_ring[i]);
+
+	return err;
+}
+
+static void enetc_free_tx_resources(struct enetc_ndev_priv *priv)
+{
+	int i;
+
+	for (i = 0; i < priv->num_tx_rings; i++)
+		enetc_free_txbdr(priv->tx_ring[i]);
+}
+
+static int enetc_alloc_rxbdr(struct enetc_bdr *rxr)
+{
+	int err;
+
+	rxr->rx_swbd = vzalloc(rxr->bd_count * sizeof(struct enetc_rx_swbd));
+	if (!rxr->rx_swbd)
+		return -ENOMEM;
+
+	err = enetc_dma_alloc_bdr(rxr, sizeof(union enetc_rx_bd));
+	if (err) {
+		vfree(rxr->rx_swbd);
+		return err;
+	}
+
+	rxr->next_to_clean = 0;
+	rxr->next_to_use = 0;
+	rxr->next_to_alloc = 0;
+
+	return 0;
+}
+
+static void enetc_free_rxbdr(struct enetc_bdr *rxr)
+{
+	int size;
+
+	size = rxr->bd_count * sizeof(union enetc_rx_bd);
+
+	dma_free_coherent(rxr->dev, size, rxr->bd_base, rxr->bd_dma_base);
+	rxr->bd_base = NULL;
+
+	vfree(rxr->rx_swbd);
+	rxr->rx_swbd = NULL;
+}
+
+static int enetc_alloc_rx_resources(struct enetc_ndev_priv *priv)
+{
+	int i, err;
+
+	for (i = 0; i < priv->num_rx_rings; i++) {
+		err = enetc_alloc_rxbdr(priv->rx_ring[i]);
+
+		if (err)
+			goto fail;
+	}
+
+	return 0;
+
+fail:
+	while (i-- > 0)
+		enetc_free_rxbdr(priv->rx_ring[i]);
+
+	return err;
+}
+
+static void enetc_free_rx_resources(struct enetc_ndev_priv *priv)
+{
+	int i;
+
+	for (i = 0; i < priv->num_rx_rings; i++)
+		enetc_free_rxbdr(priv->rx_ring[i]);
+}
+
+static void enetc_free_tx_ring(struct enetc_bdr *tx_ring)
+{
+	int i;
+
+	if (!tx_ring->tx_swbd)
+		return;
+
+	for (i = 0; i < tx_ring->bd_count; i++) {
+		struct enetc_tx_swbd *tx_swbd = &tx_ring->tx_swbd[i];
+
+		enetc_free_tx_skb(tx_ring, tx_swbd);
+	}
+
+	tx_ring->next_to_clean = 0;
+	tx_ring->next_to_use = 0;
+}
+
+static void enetc_free_rx_ring(struct enetc_bdr *rx_ring)
+{
+	int i;
+
+	if (!rx_ring->rx_swbd)
+		return;
+
+	for (i = 0; i < rx_ring->bd_count; i++) {
+		struct enetc_rx_swbd *rx_swbd = &rx_ring->rx_swbd[i];
+
+		if (!rx_swbd->page)
+			continue;
+
+		dma_unmap_page(rx_ring->dev, rx_swbd->dma,
+			       PAGE_SIZE, DMA_FROM_DEVICE);
+		__free_page(rx_swbd->page);
+		rx_swbd->page = NULL;
+	}
+
+	rx_ring->next_to_clean = 0;
+	rx_ring->next_to_use = 0;
+	rx_ring->next_to_alloc = 0;
+}
+
+static void enetc_free_rxtx_rings(struct enetc_ndev_priv *priv)
+{
+	int i;
+
+	for (i = 0; i < priv->num_rx_rings; i++)
+		enetc_free_rx_ring(priv->rx_ring[i]);
+
+	for (i = 0; i < priv->num_tx_rings; i++)
+		enetc_free_tx_ring(priv->tx_ring[i]);
+}
+
+static 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;
+}
+
+static 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;
+}
+
+static 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;
+}
+
+static void enetc_clear_cbdr(struct enetc_hw *hw)
+{
+	enetc_wr(hw, ENETC_SICBDRMR, 0);
+}
+
+static int enetc_configure_si(struct enetc_ndev_priv *priv)
+{
+	struct enetc_si *si = priv->si;
+	struct enetc_hw *hw = &si->hw;
+
+	enetc_setup_cbdr(hw, &si->cbd_ring);
+	/* set SI cache attributes */
+	enetc_wr(hw, ENETC_SICAR0,
+		 ENETC_SICAR_RD_COHERENT | ENETC_SICAR_WR_COHERENT);
+	enetc_wr(hw, ENETC_SICAR1, ENETC_SICAR_MSI);
+	/* enable SI */
+	enetc_wr(hw, ENETC_SIMR, ENETC_SIMR_EN);
+
+	return 0;
+}
+
+void enetc_init_si_rings_params(struct enetc_ndev_priv *priv)
+{
+	struct enetc_si *si = priv->si;
+	int cpus = num_online_cpus();
+
+	priv->tx_bd_count = ENETC_BDR_DEFAULT_SIZE;
+	priv->rx_bd_count = ENETC_BDR_DEFAULT_SIZE;
+
+	/* Enable all available TX rings in order to configure as many
+	 * priorities as possible, when needed.
+	 * TODO: Make # of TX rings run-time configurable
+	 */
+	priv->num_rx_rings = min_t(int, cpus, si->num_rx_rings);
+	priv->num_tx_rings = si->num_tx_rings;
+	priv->bdr_int_num = cpus;
+
+	/* 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;
+
+	err = enetc_configure_si(priv);
+	if (err)
+		goto err_config_si;
+
+	return 0;
+
+err_config_si:
+	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);
+}
+
+static void enetc_setup_txbdr(struct enetc_hw *hw, struct enetc_bdr *tx_ring)
+{
+	int idx = tx_ring->index;
+	u32 tbmr;
+
+	enetc_txbdr_wr(hw, idx, ENETC_TBBAR0,
+		       lower_32_bits(tx_ring->bd_dma_base));
+
+	enetc_txbdr_wr(hw, idx, ENETC_TBBAR1,
+		       upper_32_bits(tx_ring->bd_dma_base));
+
+	WARN_ON(!IS_ALIGNED(tx_ring->bd_count, 64)); /* multiple of 64 */
+	enetc_txbdr_wr(hw, idx, ENETC_TBLENR,
+		       ENETC_RTBLENR_LEN(tx_ring->bd_count));
+
+	/* clearing PI/CI registers for Tx not supported, adjust sw indexes */
+	tx_ring->next_to_use = enetc_txbdr_rd(hw, idx, ENETC_TBPIR);
+	tx_ring->next_to_clean = enetc_txbdr_rd(hw, idx, ENETC_TBCIR);
+
+	/* enable Tx ints by setting pkt thr to 1 */
+	enetc_txbdr_wr(hw, idx, ENETC_TBICIR0, ENETC_TBICIR0_ICEN | 0x1);
+
+	tbmr = ENETC_TBMR_EN;
+	if (tx_ring->ndev->features & NETIF_F_HW_VLAN_CTAG_TX)
+		tbmr |= ENETC_TBMR_VIH;
+
+	/* enable ring */
+	enetc_txbdr_wr(hw, idx, ENETC_TBMR, tbmr);
+
+	tx_ring->tpir = hw->reg + ENETC_BDR(TX, idx, ENETC_TBPIR);
+	tx_ring->tcir = hw->reg + ENETC_BDR(TX, idx, ENETC_TBCIR);
+	tx_ring->idr = hw->reg + ENETC_SITXIDR;
+}
+
+static void enetc_setup_rxbdr(struct enetc_hw *hw, struct enetc_bdr *rx_ring)
+{
+	int idx = rx_ring->index;
+	u32 rbmr;
+
+	enetc_rxbdr_wr(hw, idx, ENETC_RBBAR0,
+		       lower_32_bits(rx_ring->bd_dma_base));
+
+	enetc_rxbdr_wr(hw, idx, ENETC_RBBAR1,
+		       upper_32_bits(rx_ring->bd_dma_base));
+
+	WARN_ON(!IS_ALIGNED(rx_ring->bd_count, 64)); /* multiple of 64 */
+	enetc_rxbdr_wr(hw, idx, ENETC_RBLENR,
+		       ENETC_RTBLENR_LEN(rx_ring->bd_count));
+
+	enetc_rxbdr_wr(hw, idx, ENETC_RBBSR, ENETC_RXB_DMA_SIZE);
+
+	enetc_rxbdr_wr(hw, idx, ENETC_RBPIR, 0);
+
+	/* enable Rx ints by setting pkt thr to 1 */
+	enetc_rxbdr_wr(hw, idx, ENETC_RBICIR0, ENETC_RBICIR0_ICEN | 0x1);
+
+	rbmr = ENETC_RBMR_EN;
+	if (rx_ring->ndev->features & NETIF_F_HW_VLAN_CTAG_RX)
+		rbmr |= ENETC_RBMR_VTE;
+
+	rx_ring->rcir = hw->reg + ENETC_BDR(RX, idx, ENETC_RBCIR);
+	rx_ring->idr = hw->reg + ENETC_SIRXIDR;
+
+	enetc_refill_rx_ring(rx_ring, enetc_bd_unused(rx_ring));
+
+	/* enable ring */
+	enetc_rxbdr_wr(hw, idx, ENETC_RBMR, rbmr);
+}
+
+static void enetc_setup_bdrs(struct enetc_ndev_priv *priv)
+{
+	int i;
+
+	for (i = 0; i < priv->num_tx_rings; i++)
+		enetc_setup_txbdr(&priv->si->hw, priv->tx_ring[i]);
+
+	for (i = 0; i < priv->num_rx_rings; i++)
+		enetc_setup_rxbdr(&priv->si->hw, priv->rx_ring[i]);
+}
+
+static void enetc_clear_rxbdr(struct enetc_hw *hw, struct enetc_bdr *rx_ring)
+{
+	int idx = rx_ring->index;
+
+	/* disable EN bit on ring */
+	enetc_rxbdr_wr(hw, idx, ENETC_RBMR, 0);
+}
+
+static void enetc_clear_txbdr(struct enetc_hw *hw, struct enetc_bdr *tx_ring)
+{
+	int delay = 8, timeout = 100;
+	int idx = tx_ring->index;
+
+	/* disable EN bit on ring */
+	enetc_txbdr_wr(hw, idx, ENETC_TBMR, 0);
+
+	/* wait for busy to clear */
+	while (delay < timeout &&
+	       enetc_txbdr_rd(hw, idx, ENETC_TBSR) & ENETC_TBSR_BUSY) {
+		msleep(delay);
+		delay *= 2;
+	}
+
+	if (delay >= timeout)
+		netdev_warn(tx_ring->ndev, "timeout for tx ring #%d clear\n",
+			    idx);
+}
+
+static void enetc_clear_bdrs(struct enetc_ndev_priv *priv)
+{
+	int i;
+
+	for (i = 0; i < priv->num_tx_rings; i++)
+		enetc_clear_txbdr(&priv->si->hw, priv->tx_ring[i]);
+
+	for (i = 0; i < priv->num_rx_rings; i++)
+		enetc_clear_rxbdr(&priv->si->hw, priv->rx_ring[i]);
+
+	udelay(1);
+}
+
+static int enetc_setup_irqs(struct enetc_ndev_priv *priv)
+{
+	struct pci_dev *pdev = priv->si->pdev;
+	cpumask_t cpu_mask;
+	int i, j, err;
+
+	for (i = 0; i < priv->bdr_int_num; i++) {
+		int irq = pci_irq_vector(pdev, ENETC_BDR_INT_BASE_IDX + i);
+		struct enetc_int_vector *v = priv->int_vector[i];
+		int entry = ENETC_BDR_INT_BASE_IDX + i;
+		struct enetc_hw *hw = &priv->si->hw;
+
+		snprintf(v->name, sizeof(v->name), "%s-rxtx%d",
+			 priv->ndev->name, i);
+		err = request_irq(irq, enetc_msix, 0, v->name, v);
+		if (err) {
+			dev_err(priv->dev, "request_irq() failed!\n");
+			goto irq_err;
+		}
+
+		v->tbier_base = hw->reg + ENETC_BDR(TX, 0, ENETC_TBIER);
+		v->rbier = hw->reg + ENETC_BDR(RX, i, ENETC_RBIER);
+
+		enetc_wr(hw, ENETC_SIMSIRRV(i), entry);
+
+		for (j = 0; j < v->count_tx_rings; j++) {
+			int idx = v->tx_ring[j].index;
+
+			enetc_wr(hw, ENETC_SIMSITRV(idx), entry);
+		}
+		cpumask_clear(&cpu_mask);
+		cpumask_set_cpu(i % num_online_cpus(), &cpu_mask);
+		irq_set_affinity_hint(irq, &cpu_mask);
+	}
+
+	return 0;
+
+irq_err:
+	while (i--) {
+		int irq = pci_irq_vector(pdev, ENETC_BDR_INT_BASE_IDX + i);
+
+		irq_set_affinity_hint(irq, NULL);
+		free_irq(irq, priv->int_vector[i]);
+	}
+
+	return err;
+}
+
+static void enetc_free_irqs(struct enetc_ndev_priv *priv)
+{
+	struct pci_dev *pdev = priv->si->pdev;
+	int i;
+
+	for (i = 0; i < priv->bdr_int_num; i++) {
+		int irq = pci_irq_vector(pdev, ENETC_BDR_INT_BASE_IDX + i);
+
+		irq_set_affinity_hint(irq, NULL);
+		free_irq(irq, priv->int_vector[i]);
+	}
+}
+
+static void enetc_enable_interrupts(struct enetc_ndev_priv *priv)
+{
+	int i;
+
+	/* enable Tx & Rx event indication */
+	for (i = 0; i < priv->num_rx_rings; i++) {
+		enetc_rxbdr_wr(&priv->si->hw, i,
+			       ENETC_RBIER, ENETC_RBIER_RXTIE);
+	}
+
+	for (i = 0; i < priv->num_tx_rings; i++) {
+		enetc_txbdr_wr(&priv->si->hw, i,
+			       ENETC_TBIER, ENETC_TBIER_TXTIE);
+	}
+}
+
+static void enetc_disable_interrupts(struct enetc_ndev_priv *priv)
+{
+	int i;
+
+	for (i = 0; i < priv->num_tx_rings; i++)
+		enetc_txbdr_wr(&priv->si->hw, i, ENETC_TBIER, 0);
+
+	for (i = 0; i < priv->num_rx_rings; i++)
+		enetc_rxbdr_wr(&priv->si->hw, i, ENETC_RBIER, 0);
+}
+
+static void adjust_link(struct net_device *ndev)
+{
+	struct phy_device *phydev = ndev->phydev;
+
+	phy_print_status(phydev);
+}
+
+static int enetc_phy_connect(struct net_device *ndev)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct phy_device *phydev;
+
+	if (!priv->phy_node)
+		return 0; /* phy-less mode */
+
+	phydev = of_phy_connect(ndev, priv->phy_node, &adjust_link,
+				0, priv->if_mode);
+	if (!phydev) {
+		dev_err(&ndev->dev, "could not attach to PHY\n");
+		return -ENODEV;
+	}
+
+	phy_attached_info(phydev);
+
+	return 0;
+}
+
+int enetc_open(struct net_device *ndev)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	int i, err;
+
+	err = enetc_setup_irqs(priv);
+	if (err)
+		return err;
+
+	err = enetc_phy_connect(ndev);
+	if (err)
+		goto err_phy_connect;
+
+	err = enetc_alloc_tx_resources(priv);
+	if (err)
+		goto err_alloc_tx;
+
+	err = enetc_alloc_rx_resources(priv);
+	if (err)
+		goto err_alloc_rx;
+
+	enetc_setup_bdrs(priv);
+
+	err = netif_set_real_num_tx_queues(ndev, priv->num_tx_rings);
+	if (err)
+		goto err_set_queues;
+
+	err = netif_set_real_num_rx_queues(ndev, priv->num_rx_rings);
+	if (err)
+		goto err_set_queues;
+
+	for (i = 0; i < priv->bdr_int_num; i++)
+		napi_enable(&priv->int_vector[i]->napi);
+
+	enetc_enable_interrupts(priv);
+
+	if (ndev->phydev)
+		phy_start(ndev->phydev);
+	else
+		netif_carrier_on(ndev);
+
+	netif_tx_start_all_queues(ndev);
+
+	return 0;
+
+err_set_queues:
+	enetc_free_rx_resources(priv);
+err_alloc_rx:
+	enetc_free_tx_resources(priv);
+err_alloc_tx:
+	if (ndev->phydev)
+		phy_disconnect(ndev->phydev);
+err_phy_connect:
+	enetc_free_irqs(priv);
+
+	return err;
+}
+
+int enetc_close(struct net_device *ndev)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	int i;
+
+	netif_tx_stop_all_queues(ndev);
+
+	if (ndev->phydev) {
+		phy_stop(ndev->phydev);
+		phy_disconnect(ndev->phydev);
+	} else {
+		netif_carrier_off(ndev);
+	}
+
+	for (i = 0; i < priv->bdr_int_num; i++) {
+		napi_synchronize(&priv->int_vector[i]->napi);
+		napi_disable(&priv->int_vector[i]->napi);
+	}
+
+	enetc_disable_interrupts(priv);
+	enetc_clear_bdrs(priv);
+
+	enetc_free_rxtx_rings(priv);
+	enetc_free_rx_resources(priv);
+	enetc_free_tx_resources(priv);
+	enetc_free_irqs(priv);
+
+	return 0;
+}
+
+struct net_device_stats *enetc_get_stats(struct net_device *ndev)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct net_device_stats *stats = &ndev->stats;
+	unsigned long packets = 0, bytes = 0;
+	int i;
+
+	for (i = 0; i < priv->num_rx_rings; i++) {
+		packets += priv->rx_ring[i]->stats.packets;
+		bytes	+= priv->rx_ring[i]->stats.bytes;
+	}
+
+	stats->rx_packets = packets;
+	stats->rx_bytes = bytes;
+	bytes = 0;
+	packets = 0;
+
+	for (i = 0; i < priv->num_tx_rings; i++) {
+		packets += priv->tx_ring[i]->stats.packets;
+		bytes	+= priv->tx_ring[i]->stats.bytes;
+	}
+
+	stats->tx_packets = packets;
+	stats->tx_bytes = bytes;
+
+	return stats;
+}
+
+int enetc_alloc_msix(struct enetc_ndev_priv *priv)
+{
+	struct pci_dev *pdev = priv->si->pdev;
+	int size, v_tx_rings;
+	int i, n, err, nvec;
+
+	nvec = ENETC_BDR_INT_BASE_IDX + priv->bdr_int_num;
+	/* allocate MSIX for both messaging and Rx/Tx interrupts */
+	n = pci_alloc_irq_vectors(pdev, nvec, nvec, PCI_IRQ_MSIX);
+
+	if (n < 0)
+		return n;
+
+	if (n != nvec)
+		return -EPERM;
+
+	/* # of tx rings per int vector */
+	v_tx_rings = priv->num_tx_rings / priv->bdr_int_num;
+	size = sizeof(struct enetc_int_vector) +
+	       sizeof(struct enetc_bdr) * v_tx_rings;
+
+	for (i = 0; i < priv->bdr_int_num; i++) {
+		struct enetc_int_vector *v;
+		struct enetc_bdr *bdr;
+		int j;
+
+		v = kzalloc(size, GFP_KERNEL);
+		if (!v) {
+			err = -ENOMEM;
+			goto fail;
+		}
+
+		priv->int_vector[i] = v;
+
+		netif_napi_add(priv->ndev, &v->napi, enetc_poll,
+			       NAPI_POLL_WEIGHT);
+		v->count_tx_rings = v_tx_rings;
+
+		for (j = 0; j < v_tx_rings; j++) {
+			int idx;
+
+			/* default tx ring mapping policy */
+			if (priv->bdr_int_num == ENETC_MAX_BDR_INT)
+				idx = 2 * j + i; /* 2 CPUs */
+			else
+				idx = j + i * v_tx_rings; /* default */
+
+			__set_bit(idx, &v->tx_rings_map);
+			bdr = &v->tx_ring[j];
+			bdr->index = idx;
+			bdr->ndev = priv->ndev;
+			bdr->dev = priv->dev;
+			bdr->bd_count = priv->tx_bd_count;
+			priv->tx_ring[idx] = bdr;
+		}
+
+		bdr = &v->rx_ring;
+		bdr->index = i;
+		bdr->ndev = priv->ndev;
+		bdr->dev = priv->dev;
+		bdr->bd_count = priv->rx_bd_count;
+		priv->rx_ring[i] = bdr;
+	}
+
+	return 0;
+
+fail:
+	while (i--) {
+		netif_napi_del(&priv->int_vector[i]->napi);
+		kfree(priv->int_vector[i]);
+	}
+
+	pci_free_irq_vectors(pdev);
+
+	return err;
+}
+
+void enetc_free_msix(struct enetc_ndev_priv *priv)
+{
+	int i;
+
+	for (i = 0; i < priv->bdr_int_num; i++) {
+		struct enetc_int_vector *v = priv->int_vector[i];
+
+		netif_napi_del(&v->napi);
+	}
+
+	for (i = 0; i < priv->num_rx_rings; i++)
+		priv->rx_ring[i] = NULL;
+
+	for (i = 0; i < priv->num_tx_rings; i++)
+		priv->tx_ring[i] = NULL;
+
+	for (i = 0; i < priv->bdr_int_num; i++) {
+		kfree(priv->int_vector[i]);
+		priv->int_vector[i] = NULL;
+	}
+
+	/* disable all MSIX for this device */
+	pci_free_irq_vectors(priv->si->pdev);
+}
+
+static void enetc_kfree_si(struct enetc_si *si)
+{
+	char *p = (char *)si - si->pad;
+
+	kfree(p);
+}
+
+static void enetc_detect_errata(struct enetc_si *si)
+{
+	if (si->pdev->revision == ENETC_REV1)
+		si->errata = ENETC_ERR_TXCSUM | ENETC_ERR_VLAN_ISOL |
+			     ENETC_ERR_UCMCSWP;
+}
+
+int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv)
+{
+	struct enetc_si *si, *p;
+	struct enetc_hw *hw;
+	size_t alloc_size;
+	int err, len;
+
+	pcie_flr(pdev);
+	err = pci_enable_device_mem(pdev);
+	if (err) {
+		dev_err(&pdev->dev, "device enable failed\n");
+		return err;
+	}
+
+	/* set up for high or low dma */
+	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (err) {
+		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+		if (err) {
+			dev_err(&pdev->dev,
+				"DMA configuration failed: 0x%x\n", err);
+			goto err_dma;
+		}
+	}
+
+	err = pci_request_mem_regions(pdev, name);
+	if (err) {
+		dev_err(&pdev->dev, "pci_request_regions failed err=%d\n", err);
+		goto err_pci_mem_reg;
+	}
+
+	pci_set_master(pdev);
+
+	alloc_size = sizeof(struct enetc_si);
+	if (sizeof_priv) {
+		/* align priv to 32B */
+		alloc_size = ALIGN(alloc_size, ENETC_SI_ALIGN);
+		alloc_size += sizeof_priv;
+	}
+	/* force 32B alignment for enetc_si */
+	alloc_size += ENETC_SI_ALIGN - 1;
+
+	p = kzalloc(alloc_size, GFP_KERNEL);
+	if (!p) {
+		err = -ENOMEM;
+		goto err_alloc_si;
+	}
+
+	si = PTR_ALIGN(p, ENETC_SI_ALIGN);
+	si->pad = (char *)si - (char *)p;
+
+	pci_set_drvdata(pdev, si);
+	si->pdev = pdev;
+	hw = &si->hw;
+
+	len = pci_resource_len(pdev, ENETC_BAR_REGS);
+	hw->reg = ioremap(pci_resource_start(pdev, ENETC_BAR_REGS), len);
+	if (!hw->reg) {
+		err = -ENXIO;
+		dev_err(&pdev->dev, "ioremap() failed\n");
+		goto err_ioremap;
+	}
+	if (len > ENETC_PORT_BASE)
+		hw->port = hw->reg + ENETC_PORT_BASE;
+	if (len > ENETC_GLOBAL_BASE)
+		hw->global = hw->reg + ENETC_GLOBAL_BASE;
+
+	enetc_detect_errata(si);
+
+	return 0;
+
+err_ioremap:
+	enetc_kfree_si(si);
+err_alloc_si:
+	pci_release_mem_regions(pdev);
+err_pci_mem_reg:
+err_dma:
+	pci_disable_device(pdev);
+
+	return err;
+}
+
+void enetc_pci_remove(struct pci_dev *pdev)
+{
+	struct enetc_si *si = pci_get_drvdata(pdev);
+	struct enetc_hw *hw = &si->hw;
+
+	iounmap(hw->reg);
+	enetc_kfree_si(si);
+	pci_release_mem_regions(pdev);
+	pci_disable_device(pdev);
+}

drivers/net/ethernet/freescale/enetc/enetc.h

+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+/* Copyright 2017-2019 NXP */
+
+#include <linux/timer.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/dma-mapping.h>
+#include <linux/skbuff.h>
+#include <linux/ethtool.h>
+#include <linux/if_vlan.h>
+#include <linux/phy.h>
+
+#include "enetc_hw.h"
+
+#define ENETC_MAC_MAXFRM_SIZE	9600
+#define ENETC_MAX_MTU		(ENETC_MAC_MAXFRM_SIZE - \
+				(ETH_FCS_LEN + ETH_HLEN + VLAN_HLEN))
+
+struct enetc_tx_swbd {
+	struct sk_buff *skb;
+	dma_addr_t dma;
+	u16 len;
+	u16 is_dma_page;
+};
+
+#define ENETC_RX_MAXFRM_SIZE	ENETC_MAC_MAXFRM_SIZE
+#define ENETC_RXB_TRUESIZE	2048 /* PAGE_SIZE >> 1 */
+#define ENETC_RXB_PAD		NET_SKB_PAD /* add extra space if needed */
+#define ENETC_RXB_DMA_SIZE	\
+	(SKB_WITH_OVERHEAD(ENETC_RXB_TRUESIZE) - ENETC_RXB_PAD)
+
+struct enetc_rx_swbd {
+	dma_addr_t dma;
+	struct page *page;
+	u16 page_offset;
+};
+
+struct enetc_ring_stats {
+	unsigned int packets;
+	unsigned int bytes;
+	unsigned int rx_alloc_errs;
+};
+
+#define ENETC_BDR_DEFAULT_SIZE	1024
+#define ENETC_DEFAULT_TX_WORK	256
+
+struct enetc_bdr {
+	struct device *dev; /* for DMA mapping */
+	struct net_device *ndev;
+	void *bd_base; /* points to Rx or Tx BD ring */
+	union {
+		void __iomem *tpir;
+		void __iomem *rcir;
+	};
+	u16 index;
+	int bd_count; /* # of BDs */
+	int next_to_use;
+	int next_to_clean;
+	union {
+		struct enetc_tx_swbd *tx_swbd;
+		struct enetc_rx_swbd *rx_swbd;
+	};
+	union {
+		void __iomem *tcir; /* Tx */
+		int next_to_alloc; /* Rx */
+	};
+	void __iomem *idr; /* Interrupt Detect Register pointer */
+
+	struct enetc_ring_stats stats;
+
+	dma_addr_t bd_dma_base;
+} ____cacheline_aligned_in_smp;
+
+static inline void enetc_bdr_idx_inc(struct enetc_bdr *bdr, int *i)
+{
+	if (unlikely(++*i == bdr->bd_count))
+		*i = 0;
+}
+
+static inline int enetc_bd_unused(struct enetc_bdr *bdr)
+{
+	if (bdr->next_to_clean > bdr->next_to_use)
+		return bdr->next_to_clean - bdr->next_to_use - 1;
+
+	return bdr->bd_count + bdr->next_to_clean - bdr->next_to_use - 1;
+}
+
+/* Control BD ring */
+#define ENETC_CBDR_DEFAULT_SIZE	64
+struct enetc_cbdr {
+	void *bd_base; /* points to Rx or Tx BD ring */
+	void __iomem *pir;
+	void __iomem *cir;
+
+	int bd_count; /* # of BDs */
+	int next_to_use;
+	int next_to_clean;
+
+	dma_addr_t bd_dma_base;
+};
+
+#define ENETC_TXBD(BDR, i) (&(((union enetc_tx_bd *)((BDR).bd_base))[i]))
+#define ENETC_RXBD(BDR, i) (&(((union enetc_rx_bd *)((BDR).bd_base))[i]))
+
+#define ENETC_REV1	0x1
+enum enetc_errata {
+	ENETC_ERR_TXCSUM	= BIT(0),
+	ENETC_ERR_VLAN_ISOL	= BIT(1),
+	ENETC_ERR_UCMCSWP	= BIT(2),
+};
+
+/* PCI IEP device data */
+struct enetc_si {
+	struct pci_dev *pdev;
+	struct enetc_hw hw;
+	enum enetc_errata errata;
+
+	struct net_device *ndev; /* back ref. */
+
+	struct enetc_cbdr cbd_ring;
+
+	int num_rx_rings; /* how many rings are available in the SI */
+	int num_tx_rings;
+	unsigned short pad;
+};
+
+#define ENETC_SI_ALIGN	32
+
+static inline void *enetc_si_priv(const struct enetc_si *si)
+{
+	return (char *)si + ALIGN(sizeof(struct enetc_si), ENETC_SI_ALIGN);
+}
+
+static inline bool enetc_si_is_pf(struct enetc_si *si)
+{
+	return !!(si->hw.port);
+}
+
+#define ENETC_MAX_NUM_TXQS	8
+#define ENETC_INT_NAME_MAX	(IFNAMSIZ + 8)
+
+struct enetc_int_vector {
+	void __iomem *rbier;
+	void __iomem *tbier_base;
+	unsigned long tx_rings_map;
+	int count_tx_rings;
+	struct napi_struct napi;
+	char name[ENETC_INT_NAME_MAX];
+
+	struct enetc_bdr rx_ring ____cacheline_aligned_in_smp;
+	struct enetc_bdr tx_ring[0];
+};
+
+#define ENETC_MAX_BDR_INT	2 /* fixed to max # of available cpus */
+
+struct enetc_ndev_priv {
+	struct net_device *ndev;
+	struct device *dev; /* dma-mapping device */
+	struct enetc_si *si;
+
+	int bdr_int_num; /* number of Rx/Tx ring interrupts */
+	struct enetc_int_vector *int_vector[ENETC_MAX_BDR_INT];
+	u16 num_rx_rings, num_tx_rings;
+	u16 rx_bd_count, tx_bd_count;
+
+	u16 msg_enable;
+
+	struct enetc_bdr *tx_ring[16];
+	struct enetc_bdr *rx_ring[16];
+
+	struct device_node *phy_node;
+	phy_interface_t if_mode;
+};
+
+#define ENETC_CBD(R, i)	(&(((struct enetc_cbd *)((R).bd_base))[i]))
+
+#define ENETC_CBDR_TIMEOUT	1000 /* usecs */
+
+/* SI common */
+int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv);
+void enetc_pci_remove(struct pci_dev *pdev);
+int enetc_alloc_msix(struct enetc_ndev_priv *priv);
+void enetc_free_msix(struct enetc_ndev_priv *priv);
+void enetc_get_si_caps(struct enetc_si *si);
+void enetc_init_si_rings_params(struct enetc_ndev_priv *priv);
+int enetc_alloc_si_resources(struct enetc_ndev_priv *priv);
+void enetc_free_si_resources(struct enetc_ndev_priv *priv);
+
+int enetc_open(struct net_device *ndev);
+int enetc_close(struct net_device *ndev);
+netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev);
+struct net_device_stats *enetc_get_stats(struct net_device *ndev);
+/* ethtool */
+void enetc_set_ethtool_ops(struct net_device *ndev);
+
+/* control buffer descriptor ring (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);

drivers/net/ethernet/freescale/enetc/enetc_cbdr.c

+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/* Copyright 2017-2019 NXP */
+
+#include "enetc.h"
+
+static void enetc_clean_cbdr(struct enetc_si *si)
+{
+	struct enetc_cbdr *ring = &si->cbd_ring;
+	struct enetc_cbd *dest_cbd;
+	int i, status;
+
+	i = ring->next_to_clean;
+
+	while (enetc_rd_reg(ring->cir) != i) {
+		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",
+				 status, dest_cbd->cmd);
+
+		memset(dest_cbd, 0, sizeof(*dest_cbd));
+
+		i = (i + 1) % ring->bd_count;
+	}
+
+	ring->next_to_clean = i;
+}
+
+static int enetc_cbd_unused(struct enetc_cbdr *r)
+{
+	return (r->next_to_clean - r->next_to_use - 1 + r->bd_count) %
+		r->bd_count;
+}
+
+static int enetc_send_cmd(struct enetc_si *si, struct enetc_cbd *cbd)
+{
+	struct enetc_cbdr *ring = &si->cbd_ring;
+	int timeout = ENETC_CBDR_TIMEOUT;
+	struct enetc_cbd *dest_cbd;
+	int i;
+
+	if (unlikely(!ring->bd_base))
+		return -EIO;
+
+	if (unlikely(!enetc_cbd_unused(ring)))
+		enetc_clean_cbdr(si);
+
+	i = ring->next_to_use;
+	dest_cbd = ENETC_CBD(*ring, i);
+
+	/* copy command to the ring */
+	*dest_cbd = *cbd;
+	i = (i + 1) % ring->bd_count;
+
+	ring->next_to_use = i;
+	/* let H/W know BD ring has been updated */
+	enetc_wr_reg(ring->pir, i);
+
+	do {
+		if (enetc_rd_reg(ring->cir) == i)
+			break;
+		udelay(10); /* cannot sleep, rtnl_lock() */
+		timeout -= 10;
+	} while (timeout);
+
+	if (!timeout)
+		return -EBUSY;
+
+	enetc_clean_cbdr(si);
+
+	return 0;
+}
+
+int enetc_clear_mac_flt_entry(struct enetc_si *si, int index)
+{
+	struct enetc_cbd cbd;
+
+	memset(&cbd, 0, sizeof(cbd));
+
+	cbd.cls = 1;
+	cbd.status_flags = ENETC_CBD_FLAGS_SF;
+	cbd.index = cpu_to_le16(index);
+
+	return enetc_send_cmd(si, &cbd);
+}
+
+int enetc_set_mac_flt_entry(struct enetc_si *si, int index,
+			    char *mac_addr, int si_map)
+{
+	struct enetc_cbd cbd;
+	u32 upper;
+	u16 lower;
+
+	memset(&cbd, 0, sizeof(cbd));
+
+	/* fill up the "set" descriptor */
+	cbd.cls = 1;
+	cbd.status_flags = ENETC_CBD_FLAGS_SF;
+	cbd.index = cpu_to_le16(index);
+	cbd.opt[3] = cpu_to_le32(si_map);
+	/* enable entry */
+	cbd.opt[0] = cpu_to_le32(BIT(31));
+
+	upper = *(const u32 *)mac_addr;
+	lower = *(const u16 *)(mac_addr + 4);
+	cbd.addr[0] = cpu_to_le32(upper);
+	cbd.addr[1] = cpu_to_le32(lower);
+
+	return enetc_send_cmd(si, &cbd);
+}

drivers/net/ethernet/freescale/enetc/enetc_ethtool.c

+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/* Copyright 2017-2019 NXP */
+
+#include <linux/net_tstamp.h>
+#include <linux/module.h>
+#include "enetc.h"
+
+static const u32 enetc_si_regs[] = {
+	ENETC_SIMR, ENETC_SIPMAR0, ENETC_SIPMAR1, ENETC_SICBDRMR,
+	ENETC_SICBDRSR,	ENETC_SICBDRBAR0, ENETC_SICBDRBAR1, ENETC_SICBDRPIR,
+	ENETC_SICBDRCIR, ENETC_SICBDRLENR, ENETC_SICAPR0, ENETC_SICAPR1,
+	ENETC_SIUEFDCR
+};
+
+static const u32 enetc_txbdr_regs[] = {
+	ENETC_TBMR, ENETC_TBSR, ENETC_TBBAR0, ENETC_TBBAR1,
+	ENETC_TBPIR, ENETC_TBCIR, ENETC_TBLENR, ENETC_TBIER
+};
+
+static const u32 enetc_rxbdr_regs[] = {
+	ENETC_RBMR, ENETC_RBSR, ENETC_RBBSR, ENETC_RBCIR, ENETC_RBBAR0,
+	ENETC_RBBAR1, ENETC_RBPIR, ENETC_RBLENR, ENETC_RBICIR0, ENETC_RBIER
+};
+
+static const u32 enetc_port_regs[] = {
+	ENETC_PMR, ENETC_PSR, ENETC_PSIPMR, ENETC_PSIPMAR0(0),
+	ENETC_PSIPMAR1(0), ENETC_PTXMBAR, ENETC_PCAPR0, ENETC_PCAPR1,
+	ENETC_PSICFGR0(0), ENETC_PTCMSDUR(0), ENETC_PM0_CMD_CFG,
+	ENETC_PM0_MAXFRM, ENETC_PM0_IF_MODE
+};
+
+static int enetc_get_reglen(struct net_device *ndev)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct enetc_hw *hw = &priv->si->hw;
+	int len;
+
+	len = ARRAY_SIZE(enetc_si_regs);
+	len += ARRAY_SIZE(enetc_txbdr_regs) * priv->num_tx_rings;
+	len += ARRAY_SIZE(enetc_rxbdr_regs) * priv->num_rx_rings;
+
+	if (hw->port)
+		len += ARRAY_SIZE(enetc_port_regs);
+
+	len *= sizeof(u32) * 2; /* store 2 entries per reg: addr and value */
+
+	return len;
+}
+
+static void enetc_get_regs(struct net_device *ndev, struct ethtool_regs *regs,
+			   void *regbuf)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct enetc_hw *hw = &priv->si->hw;
+	u32 *buf = (u32 *)regbuf;
+	int i, j;
+	u32 addr;
+
+	for (i = 0; i < ARRAY_SIZE(enetc_si_regs); i++) {
+		*buf++ = enetc_si_regs[i];
+		*buf++ = enetc_rd(hw, enetc_si_regs[i]);
+	}
+
+	for (i = 0; i < priv->num_tx_rings; i++) {
+		for (j = 0; j < ARRAY_SIZE(enetc_txbdr_regs); j++) {
+			addr = ENETC_BDR(TX, i, enetc_txbdr_regs[j]);
+
+			*buf++ = addr;
+			*buf++ = enetc_rd(hw, addr);
+		}
+	}
+
+	for (i = 0; i < priv->num_rx_rings; i++) {
+		for (j = 0; j < ARRAY_SIZE(enetc_rxbdr_regs); j++) {
+			addr = ENETC_BDR(RX, i, enetc_rxbdr_regs[j]);
+
+			*buf++ = addr;
+			*buf++ = enetc_rd(hw, addr);
+		}
+	}
+
+	if (!hw->port)
+		return;
+
+	for (i = 0; i < ARRAY_SIZE(enetc_port_regs); i++) {
+		addr = ENETC_PORT_BASE + enetc_port_regs[i];
+		*buf++ = addr;
+		*buf++ = enetc_rd(hw, addr);
+	}
+}
+
+static void enetc_get_ringparam(struct net_device *ndev,
+				struct ethtool_ringparam *ring)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+
+	ring->rx_pending = priv->rx_bd_count;
+	ring->tx_pending = priv->tx_bd_count;
+
+	/* do some h/w sanity checks for BDR length */
+	if (netif_running(ndev)) {
+		struct enetc_hw *hw = &priv->si->hw;
+		u32 val = enetc_rxbdr_rd(hw, 0, ENETC_RBLENR);
+
+		if (val != priv->rx_bd_count)
+			netif_err(priv, hw, ndev, "RxBDR[RBLENR] = %d!\n", val);
+
+		val = enetc_txbdr_rd(hw, 0, ENETC_TBLENR);
+
+		if (val != priv->tx_bd_count)
+			netif_err(priv, hw, ndev, "TxBDR[TBLENR] = %d!\n", val);
+	}
+}
+
+static const struct ethtool_ops enetc_pf_ethtool_ops = {
+	.get_regs_len = enetc_get_reglen,
+	.get_regs = enetc_get_regs,
+	.get_ringparam = enetc_get_ringparam,
+	.get_link_ksettings = phy_ethtool_get_link_ksettings,
+	.set_link_ksettings = phy_ethtool_set_link_ksettings,
+};
+
+static const struct ethtool_ops enetc_vf_ethtool_ops = {
+	.get_regs_len = enetc_get_reglen,
+	.get_regs = enetc_get_regs,
+	.get_ringparam = enetc_get_ringparam,
+};
+
+void enetc_set_ethtool_ops(struct net_device *ndev)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+
+	if (enetc_si_is_pf(priv->si))
+		ndev->ethtool_ops = &enetc_pf_ethtool_ops;
+	else
+		ndev->ethtool_ops = &enetc_vf_ethtool_ops;
+}

drivers/net/ethernet/freescale/enetc/enetc_hw.h

+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+/* Copyright 2017-2019 NXP */
+
+#include <linux/bitops.h>
+
+/* ENETC device IDs */
+#define ENETC_DEV_ID_PF	0xe100
+#define ENETC_DEV_ID_VF	0xef00
+
+/* ENETC register block BAR */
+#define ENETC_BAR_REGS	0
+
+/** SI regs, offset: 0h */
+#define ENETC_SIMR	0
+#define ENETC_SIMR_EN	BIT(31)
+#define ENETC_SICTR0	0x18
+#define ENETC_SICTR1	0x1c
+#define ENETC_SIPCAPR0	0x20
+#define ENETC_SIPCAPR1	0x24
+#define ENETC_SITGTGR	0x30
+#define ENETC_SIRBGCR	0x38
+/* cache attribute registers for transactions initiated by ENETC */
+#define ENETC_SICAR0	0x40
+#define ENETC_SICAR1	0x44
+#define ENETC_SICAR2	0x48
+/* rd snoop, no alloc
+ * wr snoop, no alloc, partial cache line update for BDs and full cache line
+ * update for data
+ */
+#define ENETC_SICAR_RD_COHERENT	0x2b2b0000
+#define ENETC_SICAR_WR_COHERENT	0x00006727
+#define ENETC_SICAR_MSI	0x00300030 /* rd/wr device, no snoop, no alloc */
+
+#define ENETC_SIPMAR0	0x80
+#define ENETC_SIPMAR1	0x84
+
+/* Control BDR regs */
+#define ENETC_SICBDRMR		0x800
+#define ENETC_SICBDRSR		0x804	/* RO */
+#define ENETC_SICBDRBAR0	0x810
+#define ENETC_SICBDRBAR1	0x814
+#define ENETC_SICBDRPIR		0x818
+#define ENETC_SICBDRCIR		0x81c
+#define ENETC_SICBDRLENR	0x820
+
+#define ENETC_SICAPR0	0x900
+#define ENETC_SICAPR1	0x904
+
+#define ENETC_PSIIER	0xa00
+#define ENETC_PSIIER_MR_MASK	GENMASK(2, 1)
+#define ENETC_PSIIDR	0xa08
+#define ENETC_SITXIDR	0xa18
+#define ENETC_SIRXIDR	0xa28
+#define ENETC_SIMSIVR	0xa30
+
+#define ENETC_SIMSITRV(n) (0xB00 + (n) * 0x4)
+#define ENETC_SIMSIRRV(n) (0xB80 + (n) * 0x4)
+
+#define ENETC_SIUEFDCR	0xe28
+
+/** SI BDR sub-blocks, n = 0..7 */
+enum enetc_bdr_type {TX, RX};
+#define ENETC_BDR_OFF(i)	((i) * 0x200)
+#define ENETC_BDR(t, i, r)	(0x8000 + (t) * 0x100 + ENETC_BDR_OFF(i) + (r))
+/* RX BDR reg offsets */
+#define ENETC_RBMR	0
+#define ENETC_RBMR_BDS	BIT(2)
+#define ENETC_RBMR_VTE	BIT(5)
+#define ENETC_RBMR_EN	BIT(31)
+#define ENETC_RBSR	0x4
+#define ENETC_RBBSR	0x8
+#define ENETC_RBCIR	0xc
+#define ENETC_RBBAR0	0x10
+#define ENETC_RBBAR1	0x14
+#define ENETC_RBPIR	0x18
+#define ENETC_RBLENR	0x20
+#define ENETC_RBIER	0xa0
+#define ENETC_RBIER_RXTIE	BIT(0)
+#define ENETC_RBIDR	0xa4
+#define ENETC_RBICIR0	0xa8
+#define ENETC_RBICIR0_ICEN	BIT(31)
+
+/* TX BDR reg offsets */
+#define ENETC_TBMR	0
+#define ENETC_TBSR_BUSY	BIT(0)
+#define ENETC_TBMR_VIH	BIT(9)
+#define ENETC_TBMR_PRIO_MASK		GENMASK(2, 0)
+#define ENETC_TBMR_PRIO_SET(val)	val
+#define ENETC_TBMR_EN	BIT(31)
+#define ENETC_TBSR	0x4
+#define ENETC_TBBAR0	0x10
+#define ENETC_TBBAR1	0x14
+#define ENETC_TBPIR	0x18
+#define ENETC_TBCIR	0x1c
+#define ENETC_TBCIR_IDX_MASK	0xffff
+#define ENETC_TBLENR	0x20
+#define ENETC_TBIER	0xa0
+#define ENETC_TBIER_TXTIE	BIT(0)
+#define ENETC_TBIDR	0xa4
+#define ENETC_TBICIR0	0xa8
+#define ENETC_TBICIR0_ICEN	BIT(31)
+
+#define ENETC_RTBLENR_LEN(n)	((n) & ~0x7)
+
+/* Port regs, offset: 1_0000h */
+#define ENETC_PORT_BASE		0x10000
+#define ENETC_PMR		0x0000
+#define ENETC_PMR_EN	GENMASK(18, 16)
+#define ENETC_PSR		0x0004 /* RO */
+#define ENETC_PSIPMR		0x0018
+#define ENETC_PSIPMR_SET_UP(n)	BIT(n) /* n = SI index */
+#define ENETC_PSIPMR_SET_MP(n)	BIT((n) + 16)
+#define ENETC_PSIPVMR		0x001c
+#define ENETC_VLAN_PROMISC_MAP_ALL	0x7
+#define ENETC_PSIPVMR_SET_VP(simap)	((simap) & 0x7)
+#define ENETC_PSIPVMR_SET_VUTA(simap)	(((simap) & 0x7) << 16)
+#define ENETC_PSIPMAR0(n)	(0x0100 + (n) * 0x8) /* n = SI index */
+#define ENETC_PSIPMAR1(n)	(0x0104 + (n) * 0x8)
+#define ENETC_PVCLCTR		0x0208
+#define ENETC_VLAN_TYPE_C	BIT(0)
+#define ENETC_VLAN_TYPE_S	BIT(1)
+#define ENETC_PVCLCTR_OVTPIDL(bmp)	((bmp) & 0xff) /* VLAN_TYPE */
+#define ENETC_PSIVLANR(n)	(0x0240 + (n) * 4) /* n = SI index */
+#define ENETC_PSIVLAN_EN	BIT(31)
+#define ENETC_PSIVLAN_SET_QOS(val)	((u32)(val) << 12)
+#define ENETC_PTXMBAR		0x0608
+#define ENETC_PCAPR0		0x0900
+#define ENETC_PCAPR0_RXBDR(val)	((val) >> 24)
+#define ENETC_PCAPR0_TXBDR(val)	(((val) >> 16) & 0xff)
+#define ENETC_PCAPR1		0x0904
+#define ENETC_PSICFGR0(n)	(0x0940 + (n) * 0xc)  /* n = SI index */
+#define ENETC_PSICFGR0_SET_TXBDR(val)	((val) & 0xff)
+#define ENETC_PSICFGR0_SET_RXBDR(val)	(((val) & 0xff) << 16)
+#define ENETC_PSICFGR0_VTE	BIT(12)
+#define ENETC_PSICFGR0_SIVIE	BIT(14)
+#define ENETC_PSICFGR0_ASE	BIT(15)
+#define ENETC_PSICFGR0_SIVC(bmp)	(((bmp) & 0xff) << 24) /* VLAN_TYPE */
+
+#define ENETC_PTCCBSR0(n)	(0x1110 + (n) * 8) /* n = 0 to 7*/
+#define ENETC_PTCCBSR1(n)	(0x1114 + (n) * 8) /* n = 0 to 7*/
+#define ENETC_PSIVLANFMR	0x1700
+#define ENETC_PSIVLANFMR_VS	BIT(0)
+#define ENETC_PFPMR		0x1900
+#define ENETC_PFPMR_PMACE	BIT(1)
+#define ENETC_PFPMR_MWLM	BIT(0)
+#define ENETC_PSIUMHFR0(n, err)	(((err) ? 0x1d08 : 0x1d00) + (n) * 0x10)
+#define ENETC_PSIUMHFR1(n)	(0x1d04 + (n) * 0x10)
+#define ENETC_PSIMMHFR0(n, err)	(((err) ? 0x1d00 : 0x1d08) + (n) * 0x10)
+#define ENETC_PSIMMHFR1(n)	(0x1d0c + (n) * 0x10)
+#define ENETC_PSIVHFR0(n)	(0x1e00 + (n) * 8) /* n = SI index */
+#define ENETC_PSIVHFR1(n)	(0x1e04 + (n) * 8) /* n = SI index */
+#define ENETC_MMCSR		0x1f00
+#define ENETC_MMCSR_ME		BIT(16)
+#define ENETC_PTCMSDUR(n)	(0x2020 + (n) * 4) /* n = TC index [0..7] */
+
+#define ENETC_PM0_CMD_CFG	0x8008
+#define ENETC_PM1_CMD_CFG	0x9008
+#define ENETC_PM0_TX_EN		BIT(0)
+#define ENETC_PM0_RX_EN		BIT(1)
+#define ENETC_PM0_PROMISC	BIT(4)
+#define ENETC_PM0_CMD_XGLP	BIT(10)
+#define ENETC_PM0_CMD_TXP	BIT(11)
+#define ENETC_PM0_CMD_PHY_TX_EN	BIT(15)
+#define ENETC_PM0_CMD_SFD	BIT(21)
+#define ENETC_PM0_MAXFRM	0x8014
+#define ENETC_SET_TX_MTU(val)	((val) << 16)
+#define ENETC_SET_MAXFRM(val)	((val) & 0xffff)
+#define ENETC_PM0_IF_MODE	0x8300
+#define ENETC_PMO_IFM_RG	BIT(2)
+#define ENETC_PM0_IFM_RLP	(BIT(5) | BIT(11))
+#define ENETC_PM0_IFM_RGAUTO	(BIT(15) | ENETC_PMO_IFM_RG | BIT(1))
+#define ENETC_PM0_IFM_XGMII	BIT(12)
+
+/** Global regs, offset: 2_0000h */
+#define ENETC_GLOBAL_BASE	0x20000
+#define ENETC_G_EIPBRR0		0x0bf8
+#define ENETC_G_EIPBRR1		0x0bfc
+#define ENETC_G_EPFBLPR(n)	(0xd00 + 4 * (n))
+#define ENETC_G_EPFBLPR1_XGMII	0x80000000
+
+/* PCI device info */
+struct enetc_hw {
+	/* SI registers, used by all PCI functions */
+	void __iomem *reg;
+	/* Port registers, PF only */
+	void __iomem *port;
+	/* IP global registers, PF only */
+	void __iomem *global;
+};
+
+/* general register accessors */
+#define enetc_rd_reg(reg)	ioread32((reg))
+#define enetc_wr_reg(reg, val)	iowrite32((val), (reg))
+
+#define enetc_rd(hw, off)		enetc_rd_reg((hw)->reg + (off))
+#define enetc_wr(hw, off, val)		enetc_wr_reg((hw)->reg + (off), val)
+/* port register accessors - PF only */
+#define enetc_port_rd(hw, off)		enetc_rd_reg((hw)->port + (off))
+#define enetc_port_wr(hw, off, val)	enetc_wr_reg((hw)->port + (off), val)
+/* global register accessors - PF only */
+#define enetc_global_rd(hw, off)	enetc_rd_reg((hw)->global + (off))
+#define enetc_global_wr(hw, off, val)	enetc_wr_reg((hw)->global + (off), val)
+/* BDR register accessors, see ENETC_BDR() */
+#define enetc_bdr_rd(hw, t, n, off) \
+				enetc_rd(hw, ENETC_BDR(t, n, off))
+#define enetc_bdr_wr(hw, t, n, off, val) \
+				enetc_wr(hw, ENETC_BDR(t, n, off), val)
+#define enetc_txbdr_rd(hw, n, off) enetc_bdr_rd(hw, TX, n, off)
+#define enetc_rxbdr_rd(hw, n, off) enetc_bdr_rd(hw, RX, n, off)
+#define enetc_txbdr_wr(hw, n, off, val) \
+				enetc_bdr_wr(hw, TX, n, off, val)
+#define enetc_rxbdr_wr(hw, n, off, val) \
+				enetc_bdr_wr(hw, RX, n, off, val)
+
+/* Buffer Descriptors (BD) */
+union enetc_tx_bd {
+	struct {
+		__le64 addr;
+		__le16 buf_len;
+		__le16 frm_len;
+		union {
+			struct {
+				__le16 l3_csoff;
+				u8 l4_csoff;
+				u8 flags;
+			}; /* default layout */
+			__le32 lstatus;
+		};
+	};
+	struct {
+		__le32 tstamp;
+		__le16 tpid;
+		__le16 vid;
+		u8 reserved[6];
+		u8 e_flags;
+		u8 flags;
+	} ext; /* Tx BD extension */
+};
+
+#define ENETC_TXBD_FLAGS_L4CS	BIT(0)
+#define ENETC_TXBD_FLAGS_W	BIT(2)
+#define ENETC_TXBD_FLAGS_CSUM	BIT(3)
+#define ENETC_TXBD_FLAGS_EX	BIT(6)
+#define ENETC_TXBD_FLAGS_F	BIT(7)
+
+static inline void enetc_clear_tx_bd(union enetc_tx_bd *txbd)
+{
+	memset(txbd, 0, sizeof(*txbd));
+}
+
+/* L3 csum flags */
+#define ENETC_TXBD_L3_IPCS	BIT(7)
+#define ENETC_TXBD_L3_IPV6	BIT(15)
+
+#define ENETC_TXBD_L3_START_MASK	GENMASK(6, 0)
+#define ENETC_TXBD_L3_SET_HSIZE(val)	((((val) >> 2) & 0x7f) << 8)
+
+/* Extension flags */
+#define ENETC_TXBD_E_FLAGS_VLAN_INS	BIT(0)
+#define ENETC_TXBD_E_FLAGS_TWO_STEP_PTP	BIT(2)
+
+static inline __le16 enetc_txbd_l3_csoff(int start, int hdr_sz, u16 l3_flags)
+{
+	return cpu_to_le16(l3_flags | ENETC_TXBD_L3_SET_HSIZE(hdr_sz) |
+			   (start & ENETC_TXBD_L3_START_MASK));
+}
+
+/* L4 csum flags */
+#define ENETC_TXBD_L4_UDP	BIT(5)
+#define ENETC_TXBD_L4_TCP	BIT(6)
+
+union enetc_rx_bd {
+	struct {
+		__le64 addr;
+		u8 reserved[8];
+	} w;
+	struct {
+		__le16 inet_csum;
+		__le16 parse_summary;
+		__le32 rss_hash;
+		__le16 buf_len;
+		__le16 vlan_opt;
+		union {
+			struct {
+				__le16 flags;
+				__le16 error;
+			};
+			__le32 lstatus;
+		};
+	} r;
+};
+
+#define ENETC_RXBD_LSTATUS_R	BIT(30)
+#define ENETC_RXBD_LSTATUS_F	BIT(31)
+#define ENETC_RXBD_ERR_MASK	0xff
+#define ENETC_RXBD_LSTATUS(flags)	((flags) << 16)
+#define ENETC_RXBD_FLAG_VLAN	BIT(9)
+#define ENETC_RXBD_FLAG_TSTMP	BIT(10)
+
+#define ENETC_MAC_ADDR_FILT_CNT	8 /* # of supported entries per port */
+#define EMETC_MAC_ADDR_FILT_RES	3 /* # of reserved entries at the beginning */
+#define ENETC_MAX_NUM_VFS	2
+
+struct enetc_cbd {
+	union {
+		struct {
+			__le32 addr[2];
+			__le32 opt[4];
+		};
+		__le32 data[6];
+	};
+	__le16 index;
+	__le16 length;
+	u8 cmd;
+	u8 cls;
+	u8 _res;
+	u8 status_flags;
+};
+
+#define ENETC_CBD_FLAGS_SF	BIT(7) /* short format */
+#define ENETC_CBD_STATUS_MASK	0xf
+
+static inline void enetc_get_primary_mac_addr(struct enetc_hw *hw, u8 *addr)
+{
+	*(u32 *)addr = __raw_readl(hw->reg + ENETC_SIPMAR0);
+	*(u16 *)(addr + 4) = __raw_readw(hw->reg + ENETC_SIPMAR1);
+}
+
+#define ENETC_SI_INT_IDX	0
+/* base index for Rx/Tx interrupts */
+#define ENETC_BDR_INT_BASE_IDX	1
+
+/* Common H/W utility functions */
+
+static inline void enetc_enable_rxvlan(struct enetc_hw *hw, int si_idx,
+				       bool en)
+{
+	u32 val = enetc_rxbdr_rd(hw, si_idx, ENETC_RBMR);
+
+	val = (val & ~ENETC_RBMR_VTE) | (en ? ENETC_RBMR_VTE : 0);
+	enetc_rxbdr_wr(hw, si_idx, ENETC_RBMR, val);
+}
+
+static inline void enetc_enable_txvlan(struct enetc_hw *hw, int si_idx,
+				       bool en)
+{
+	u32 val = enetc_txbdr_rd(hw, si_idx, ENETC_TBMR);
+
+	val = (val & ~ENETC_TBMR_VIH) | (en ? ENETC_TBMR_VIH : 0);
+	enetc_txbdr_wr(hw, si_idx, ENETC_TBMR, val);
+}

drivers/net/ethernet/freescale/enetc/enetc_pf.c

+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/* Copyright 2017-2019 NXP */
+
+#include <linux/module.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include "enetc_pf.h"
+
+#define ENETC_DRV_VER_MAJ 1
+#define ENETC_DRV_VER_MIN 0
+
+#define ENETC_DRV_VER_STR __stringify(ENETC_DRV_VER_MAJ) "." \
+			  __stringify(ENETC_DRV_VER_MIN)
+static const char enetc_drv_ver[] = ENETC_DRV_VER_STR;
+#define ENETC_DRV_NAME_STR "ENETC PF driver"
+static const char enetc_drv_name[] = ENETC_DRV_NAME_STR;
+
+static void enetc_pf_get_primary_mac_addr(struct enetc_hw *hw, int si, u8 *addr)
+{
+	u32 upper = __raw_readl(hw->port + ENETC_PSIPMAR0(si));
+	u16 lower = __raw_readw(hw->port + ENETC_PSIPMAR1(si));
+
+	*(u32 *)addr = upper;
+	*(u16 *)(addr + 4) = lower;
+}
+
+static void enetc_pf_set_primary_mac_addr(struct enetc_hw *hw, int si,
+					  const u8 *addr)
+{
+	u32 upper = *(const u32 *)addr;
+	u16 lower = *(const u16 *)(addr + 4);
+
+	__raw_writel(upper, hw->port + ENETC_PSIPMAR0(si));
+	__raw_writew(lower, hw->port + ENETC_PSIPMAR1(si));
+}
+
+static int enetc_pf_set_mac_addr(struct net_device *ndev, void *addr)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct sockaddr *saddr = addr;
+
+	if (!is_valid_ether_addr(saddr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	memcpy(ndev->dev_addr, saddr->sa_data, ndev->addr_len);
+	enetc_pf_set_primary_mac_addr(&priv->si->hw, 0, saddr->sa_data);
+
+	return 0;
+}
+
+static void enetc_set_vlan_promisc(struct enetc_hw *hw, char si_map)
+{
+	u32 val = enetc_port_rd(hw, ENETC_PSIPVMR);
+
+	val &= ~ENETC_PSIPVMR_SET_VP(ENETC_VLAN_PROMISC_MAP_ALL);
+	enetc_port_wr(hw, ENETC_PSIPVMR, ENETC_PSIPVMR_SET_VP(si_map) | val);
+}
+
+static bool enetc_si_vlan_promisc_is_on(struct enetc_pf *pf, int si_idx)
+{
+	return pf->vlan_promisc_simap & BIT(si_idx);
+}
+
+static bool enetc_vlan_filter_is_on(struct enetc_pf *pf)
+{
+	int i;
+
+	for_each_set_bit(i, pf->active_vlans, VLAN_N_VID)
+		return true;
+
+	return false;
+}
+
+static void enetc_enable_si_vlan_promisc(struct enetc_pf *pf, int si_idx)
+{
+	pf->vlan_promisc_simap |= BIT(si_idx);
+	enetc_set_vlan_promisc(&pf->si->hw, pf->vlan_promisc_simap);
+}
+
+static void enetc_disable_si_vlan_promisc(struct enetc_pf *pf, int si_idx)
+{
+	pf->vlan_promisc_simap &= ~BIT(si_idx);
+	enetc_set_vlan_promisc(&pf->si->hw, pf->vlan_promisc_simap);
+}
+
+static void enetc_set_isol_vlan(struct enetc_hw *hw, int si, u16 vlan, u8 qos)
+{
+	u32 val = 0;
+
+	if (vlan)
+		val = ENETC_PSIVLAN_EN | ENETC_PSIVLAN_SET_QOS(qos) | vlan;
+
+	enetc_port_wr(hw, ENETC_PSIVLANR(si), val);
+}
+
+static int enetc_mac_addr_hash_idx(const u8 *addr)
+{
+	u64 fold = __swab64(ether_addr_to_u64(addr)) >> 16;
+	u64 mask = 0;
+	int res = 0;
+	int i;
+
+	for (i = 0; i < 8; i++)
+		mask |= BIT_ULL(i * 6);
+
+	for (i = 0; i < 6; i++)
+		res |= (hweight64(fold & (mask << i)) & 0x1) << i;
+
+	return res;
+}
+
+static void enetc_reset_mac_addr_filter(struct enetc_mac_filter *filter)
+{
+	filter->mac_addr_cnt = 0;
+
+	bitmap_zero(filter->mac_hash_table,
+		    ENETC_MADDR_HASH_TBL_SZ);
+}
+
+static void enetc_add_mac_addr_em_filter(struct enetc_mac_filter *filter,
+					 const unsigned char *addr)
+{
+	/* add exact match addr */
+	ether_addr_copy(filter->mac_addr, addr);
+	filter->mac_addr_cnt++;
+}
+
+static void enetc_add_mac_addr_ht_filter(struct enetc_mac_filter *filter,
+					 const unsigned char *addr)
+{
+	int idx = enetc_mac_addr_hash_idx(addr);
+
+	/* add hash table entry */
+	__set_bit(idx, filter->mac_hash_table);
+	filter->mac_addr_cnt++;
+}
+
+static void enetc_clear_mac_ht_flt(struct enetc_si *si, int si_idx, int type)
+{
+	bool err = si->errata & ENETC_ERR_UCMCSWP;
+
+	if (type == UC) {
+		enetc_port_wr(&si->hw, ENETC_PSIUMHFR0(si_idx, err), 0);
+		enetc_port_wr(&si->hw, ENETC_PSIUMHFR1(si_idx), 0);
+	} else { /* MC */
+		enetc_port_wr(&si->hw, ENETC_PSIMMHFR0(si_idx, err), 0);
+		enetc_port_wr(&si->hw, ENETC_PSIMMHFR1(si_idx), 0);
+	}
+}
+
+static void enetc_set_mac_ht_flt(struct enetc_si *si, int si_idx, int type,
+				 u32 *hash)
+{
+	bool err = si->errata & ENETC_ERR_UCMCSWP;
+
+	if (type == UC) {
+		enetc_port_wr(&si->hw, ENETC_PSIUMHFR0(si_idx, err), *hash);
+		enetc_port_wr(&si->hw, ENETC_PSIUMHFR1(si_idx), *(hash + 1));
+	} else { /* MC */
+		enetc_port_wr(&si->hw, ENETC_PSIMMHFR0(si_idx, err), *hash);
+		enetc_port_wr(&si->hw, ENETC_PSIMMHFR1(si_idx), *(hash + 1));
+	}
+}
+
+static void enetc_sync_mac_filters(struct enetc_pf *pf)
+{
+	struct enetc_mac_filter *f = pf->mac_filter;
+	struct enetc_si *si = pf->si;
+	int i, pos;
+
+	pos = EMETC_MAC_ADDR_FILT_RES;
+
+	for (i = 0; i < MADDR_TYPE; i++, f++) {
+		bool em = (f->mac_addr_cnt == 1) && (i == UC);
+		bool clear = !f->mac_addr_cnt;
+
+		if (clear) {
+			if (i == UC)
+				enetc_clear_mac_flt_entry(si, pos);
+
+			enetc_clear_mac_ht_flt(si, 0, i);
+			continue;
+		}
+
+		/* exact match filter */
+		if (em) {
+			int err;
+
+			enetc_clear_mac_ht_flt(si, 0, UC);
+
+			err = enetc_set_mac_flt_entry(si, pos, f->mac_addr,
+						      BIT(0));
+			if (!err)
+				continue;
+
+			/* fallback to HT filtering */
+			dev_warn(&si->pdev->dev, "fallback to HT filt (%d)\n",
+				 err);
+		}
+
+		/* hash table filter, clear EM filter for UC entries */
+		if (i == UC)
+			enetc_clear_mac_flt_entry(si, pos);
+
+		enetc_set_mac_ht_flt(si, 0, i, (u32 *)f->mac_hash_table);
+	}
+}
+
+static void enetc_pf_set_rx_mode(struct net_device *ndev)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct enetc_pf *pf = enetc_si_priv(priv->si);
+	struct enetc_hw *hw = &priv->si->hw;
+	bool uprom = false, mprom = false;
+	struct enetc_mac_filter *filter;
+	struct netdev_hw_addr *ha;
+	u32 psipmr = 0;
+	bool em;
+
+	if (ndev->flags & IFF_PROMISC) {
+		/* enable promisc mode for SI0 (PF) */
+		psipmr = ENETC_PSIPMR_SET_UP(0) | ENETC_PSIPMR_SET_MP(0);
+		uprom = true;
+		mprom = true;
+		/* enable VLAN promisc mode for SI0 */
+		if (!enetc_si_vlan_promisc_is_on(pf, 0))
+			enetc_enable_si_vlan_promisc(pf, 0);
+
+	} else if (ndev->flags & IFF_ALLMULTI) {
+		/* enable multi cast promisc mode for SI0 (PF) */
+		psipmr = ENETC_PSIPMR_SET_MP(0);
+		mprom = true;
+	}
+
+	/* first 2 filter entries belong to PF */
+	if (!uprom) {
+		/* Update unicast filters */
+		filter = &pf->mac_filter[UC];
+		enetc_reset_mac_addr_filter(filter);
+
+		em = (netdev_uc_count(ndev) == 1);
+		netdev_for_each_uc_addr(ha, ndev) {
+			if (em) {
+				enetc_add_mac_addr_em_filter(filter, ha->addr);
+				break;
+			}
+
+			enetc_add_mac_addr_ht_filter(filter, ha->addr);
+		}
+	}
+
+	if (!mprom) {
+		/* Update multicast filters */
+		filter = &pf->mac_filter[MC];
+		enetc_reset_mac_addr_filter(filter);
+
+		netdev_for_each_mc_addr(ha, ndev) {
+			if (!is_multicast_ether_addr(ha->addr))
+				continue;
+
+			enetc_add_mac_addr_ht_filter(filter, ha->addr);
+		}
+	}
+
+	if (!uprom || !mprom)
+		/* update PF entries */
+		enetc_sync_mac_filters(pf);
+
+	psipmr |= enetc_port_rd(hw, ENETC_PSIPMR) &
+		  ~(ENETC_PSIPMR_SET_UP(0) | ENETC_PSIPMR_SET_MP(0));
+	enetc_port_wr(hw, ENETC_PSIPMR, psipmr);
+}
+
+static void enetc_set_vlan_ht_filter(struct enetc_hw *hw, int si_idx,
+				     u32 *hash)
+{
+	enetc_port_wr(hw, ENETC_PSIVHFR0(si_idx), *hash);
+	enetc_port_wr(hw, ENETC_PSIVHFR1(si_idx), *(hash + 1));
+}
+
+static int enetc_vid_hash_idx(unsigned int vid)
+{
+	int res = 0;
+	int i;
+
+	for (i = 0; i < 6; i++)
+		res |= (hweight8(vid & (BIT(i) | BIT(i + 6))) & 0x1) << i;
+
+	return res;
+}
+
+static void enetc_sync_vlan_ht_filter(struct enetc_pf *pf, bool rehash)
+{
+	int i;
+
+	if (rehash) {
+		bitmap_zero(pf->vlan_ht_filter, ENETC_VLAN_HT_SIZE);
+
+		for_each_set_bit(i, pf->active_vlans, VLAN_N_VID) {
+			int hidx = enetc_vid_hash_idx(i);
+
+			__set_bit(hidx, pf->vlan_ht_filter);
+		}
+	}
+
+	enetc_set_vlan_ht_filter(&pf->si->hw, 0, (u32 *)pf->vlan_ht_filter);
+}
+
+static int enetc_vlan_rx_add_vid(struct net_device *ndev, __be16 prot, u16 vid)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct enetc_pf *pf = enetc_si_priv(priv->si);
+	int idx;
+
+	if (enetc_si_vlan_promisc_is_on(pf, 0))
+		enetc_disable_si_vlan_promisc(pf, 0);
+
+	__set_bit(vid, pf->active_vlans);
+
+	idx = enetc_vid_hash_idx(vid);
+	if (!__test_and_set_bit(idx, pf->vlan_ht_filter))
+		enetc_sync_vlan_ht_filter(pf, false);
+
+	return 0;
+}
+
+static int enetc_vlan_rx_del_vid(struct net_device *ndev, __be16 prot, u16 vid)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct enetc_pf *pf = enetc_si_priv(priv->si);
+
+	__clear_bit(vid, pf->active_vlans);
+	enetc_sync_vlan_ht_filter(pf, true);
+
+	if (!enetc_vlan_filter_is_on(pf))
+		enetc_enable_si_vlan_promisc(pf, 0);
+
+	return 0;
+}
+
+static void enetc_set_loopback(struct net_device *ndev, bool en)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct enetc_hw *hw = &priv->si->hw;
+	u32 reg;
+
+	reg = enetc_port_rd(hw, ENETC_PM0_IF_MODE);
+	if (reg & ENETC_PMO_IFM_RG) {
+		/* RGMII mode */
+		reg = (reg & ~ENETC_PM0_IFM_RLP) |
+		      (en ? ENETC_PM0_IFM_RLP : 0);
+		enetc_port_wr(hw, ENETC_PM0_IF_MODE, reg);
+	} else {
+		/* assume SGMII mode */
+		reg = enetc_port_rd(hw, ENETC_PM0_CMD_CFG);
+		reg = (reg & ~ENETC_PM0_CMD_XGLP) |
+		      (en ? ENETC_PM0_CMD_XGLP : 0);
+		reg = (reg & ~ENETC_PM0_CMD_PHY_TX_EN) |
+		      (en ? ENETC_PM0_CMD_PHY_TX_EN : 0);
+		enetc_port_wr(hw, ENETC_PM0_CMD_CFG, reg);
+		enetc_port_wr(hw, ENETC_PM1_CMD_CFG, reg);
+	}
+}
+
+static int enetc_pf_set_vf_mac(struct net_device *ndev, int vf, u8 *mac)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct enetc_pf *pf = enetc_si_priv(priv->si);
+
+	if (vf >= pf->total_vfs)
+		return -EINVAL;
+
+	if (!is_valid_ether_addr(mac))
+		return -EADDRNOTAVAIL;
+
+	enetc_pf_set_primary_mac_addr(&priv->si->hw, vf + 1, mac);
+	return 0;
+}
+
+static int enetc_pf_set_vf_vlan(struct net_device *ndev, int vf, u16 vlan,
+				u8 qos, __be16 proto)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct enetc_pf *pf = enetc_si_priv(priv->si);
+
+	if (priv->si->errata & ENETC_ERR_VLAN_ISOL)
+		return -EOPNOTSUPP;
+
+	if (vf >= pf->total_vfs)
+		return -EINVAL;
+
+	if (proto != htons(ETH_P_8021Q))
+		/* only C-tags supported for now */
+		return -EPROTONOSUPPORT;
+
+	enetc_set_isol_vlan(&priv->si->hw, vf + 1, vlan, qos);
+	return 0;
+}
+
+static int enetc_pf_set_vf_spoofchk(struct net_device *ndev, int vf, bool en)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct enetc_pf *pf = enetc_si_priv(priv->si);
+	u32 cfgr;
+
+	if (vf >= pf->total_vfs)
+		return -EINVAL;
+
+	cfgr = enetc_port_rd(&priv->si->hw, ENETC_PSICFGR0(vf + 1));
+	cfgr = (cfgr & ~ENETC_PSICFGR0_ASE) | (en ? ENETC_PSICFGR0_ASE : 0);
+	enetc_port_wr(&priv->si->hw, ENETC_PSICFGR0(vf + 1), cfgr);
+
+	return 0;
+}
+
+static void enetc_port_setup_primary_mac_address(struct enetc_si *si)
+{
+	unsigned char mac_addr[MAX_ADDR_LEN];
+	struct enetc_pf *pf = enetc_si_priv(si);
+	struct enetc_hw *hw = &si->hw;
+	int i;
+
+	/* check MAC addresses for PF and all VFs, if any is 0 set it ro rand */
+	for (i = 0; i < pf->total_vfs + 1; i++) {
+		enetc_pf_get_primary_mac_addr(hw, i, mac_addr);
+		if (!is_zero_ether_addr(mac_addr))
+			continue;
+		eth_random_addr(mac_addr);
+		dev_info(&si->pdev->dev, "no MAC address specified for SI%d, using %pM\n",
+			 i, mac_addr);
+		enetc_pf_set_primary_mac_addr(hw, i, mac_addr);
+	}
+}
+
+static void enetc_port_si_configure(struct enetc_si *si)
+{
+	struct enetc_pf *pf = enetc_si_priv(si);
+	struct enetc_hw *hw = &si->hw;
+	int num_rings, i;
+	u32 val;
+
+	val = enetc_port_rd(hw, ENETC_PCAPR0);
+	num_rings = min(ENETC_PCAPR0_RXBDR(val), ENETC_PCAPR0_TXBDR(val));
+
+	val = ENETC_PSICFGR0_SET_TXBDR(ENETC_PF_NUM_RINGS);
+	val |= ENETC_PSICFGR0_SET_RXBDR(ENETC_PF_NUM_RINGS);
+
+	if (unlikely(num_rings < ENETC_PF_NUM_RINGS)) {
+		val = ENETC_PSICFGR0_SET_TXBDR(num_rings);
+		val |= ENETC_PSICFGR0_SET_RXBDR(num_rings);
+
+		dev_warn(&si->pdev->dev, "Found %d rings, expected %d!\n",
+			 num_rings, ENETC_PF_NUM_RINGS);
+
+		num_rings = 0;
+	}
+
+	/* Add default one-time settings for SI0 (PF) */
+	val |= ENETC_PSICFGR0_SIVC(ENETC_VLAN_TYPE_C | ENETC_VLAN_TYPE_S);
+
+	enetc_port_wr(hw, ENETC_PSICFGR0(0), val);
+
+	if (num_rings)
+		num_rings -= ENETC_PF_NUM_RINGS;
+
+	/* Configure the SIs for each available VF */
+	val = ENETC_PSICFGR0_SIVC(ENETC_VLAN_TYPE_C | ENETC_VLAN_TYPE_S);
+	val |= ENETC_PSICFGR0_VTE | ENETC_PSICFGR0_SIVIE;
+
+	if (num_rings) {
+		num_rings /= pf->total_vfs;
+		val |= ENETC_PSICFGR0_SET_TXBDR(num_rings);
+		val |= ENETC_PSICFGR0_SET_RXBDR(num_rings);
+	}
+
+	for (i = 0; i < pf->total_vfs; i++)
+		enetc_port_wr(hw, ENETC_PSICFGR0(i + 1), val);
+
+	/* Port level VLAN settings */
+	val = ENETC_PVCLCTR_OVTPIDL(ENETC_VLAN_TYPE_C | ENETC_VLAN_TYPE_S);
+	enetc_port_wr(hw, ENETC_PVCLCTR, val);
+	/* use outer tag for VLAN filtering */
+	enetc_port_wr(hw, ENETC_PSIVLANFMR, ENETC_PSIVLANFMR_VS);
+}
+
+static void enetc_configure_port_mac(struct enetc_hw *hw)
+{
+	enetc_port_wr(hw, ENETC_PM0_MAXFRM,
+		      ENETC_SET_MAXFRM(ENETC_RX_MAXFRM_SIZE));
+
+	enetc_port_wr(hw, ENETC_PTCMSDUR(0), ENETC_MAC_MAXFRM_SIZE);
+	enetc_port_wr(hw, ENETC_PTXMBAR, 2 * ENETC_MAC_MAXFRM_SIZE);
+
+	enetc_port_wr(hw, ENETC_PM0_CMD_CFG, ENETC_PM0_CMD_PHY_TX_EN |
+		      ENETC_PM0_CMD_TXP	| ENETC_PM0_PROMISC |
+		      ENETC_PM0_TX_EN | ENETC_PM0_RX_EN);
+
+	enetc_port_wr(hw, ENETC_PM1_CMD_CFG, ENETC_PM0_CMD_PHY_TX_EN |
+		      ENETC_PM0_CMD_TXP	| ENETC_PM0_PROMISC |
+		      ENETC_PM0_TX_EN | ENETC_PM0_RX_EN);
+	/* set auto-speed for RGMII */
+	if (enetc_port_rd(hw, ENETC_PM0_IF_MODE) & ENETC_PMO_IFM_RG)
+		enetc_port_wr(hw, ENETC_PM0_IF_MODE, ENETC_PM0_IFM_RGAUTO);
+	if (enetc_global_rd(hw, ENETC_G_EPFBLPR(1)) == ENETC_G_EPFBLPR1_XGMII)
+		enetc_port_wr(hw, ENETC_PM0_IF_MODE, ENETC_PM0_IFM_XGMII);
+}
+
+static void enetc_configure_port_pmac(struct enetc_hw *hw)
+{
+	u32 temp;
+
+	/* Set pMAC step lock */
+	temp = enetc_port_rd(hw, ENETC_PFPMR);
+	enetc_port_wr(hw, ENETC_PFPMR,
+		      temp | ENETC_PFPMR_PMACE | ENETC_PFPMR_MWLM);
+
+	temp = enetc_port_rd(hw, ENETC_MMCSR);
+	enetc_port_wr(hw, ENETC_MMCSR, temp | ENETC_MMCSR_ME);
+}
+
+static void enetc_configure_port(struct enetc_pf *pf)
+{
+	struct enetc_hw *hw = &pf->si->hw;
+
+	enetc_configure_port_pmac(hw);
+
+	enetc_configure_port_mac(hw);
+
+	enetc_port_si_configure(pf->si);
+
+	/* fix-up primary MAC addresses, if not set already */
+	enetc_port_setup_primary_mac_address(pf->si);
+
+	/* enforce VLAN promisc mode for all SIs */
+	pf->vlan_promisc_simap = ENETC_VLAN_PROMISC_MAP_ALL;
+	enetc_set_vlan_promisc(hw, pf->vlan_promisc_simap);
+
+	enetc_port_wr(hw, ENETC_PSIPMR, 0);
+
+	/* enable port */
+	enetc_port_wr(hw, ENETC_PMR, ENETC_PMR_EN);
+}
+
+#ifdef CONFIG_PCI_IOV
+static int enetc_sriov_configure(struct pci_dev *pdev, int num_vfs)
+{
+	struct enetc_si *si = pci_get_drvdata(pdev);
+	struct enetc_pf *pf = enetc_si_priv(si);
+	int err;
+
+	if (!num_vfs) {
+		pf->num_vfs = 0;
+		pci_disable_sriov(pdev);
+	} else {
+		pf->num_vfs = num_vfs;
+
+		err = pci_enable_sriov(pdev, num_vfs);
+		if (err) {
+			dev_err(&pdev->dev, "pci_enable_sriov err %d\n", err);
+			goto err_en_sriov;
+		}
+	}
+
+	return num_vfs;
+
+err_en_sriov:
+	pf->num_vfs = 0;
+
+	return err;
+}
+#else
+#define enetc_sriov_configure(pdev, num_vfs)	(void)0
+#endif
+
+static int enetc_pf_set_features(struct net_device *ndev,
+				 netdev_features_t features)
+{
+	netdev_features_t changed = ndev->features ^ features;
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+
+	if (changed & NETIF_F_HW_VLAN_CTAG_RX)
+		enetc_enable_rxvlan(&priv->si->hw, 0,
+				    !!(features & NETIF_F_HW_VLAN_CTAG_RX));
+
+	if (changed & NETIF_F_HW_VLAN_CTAG_TX)
+		enetc_enable_txvlan(&priv->si->hw, 0,
+				    !!(features & NETIF_F_HW_VLAN_CTAG_TX));
+
+	if (changed & NETIF_F_LOOPBACK)
+		enetc_set_loopback(ndev, !!(features & NETIF_F_LOOPBACK));
+
+	return 0;
+}
+
+static const struct net_device_ops enetc_ndev_ops = {
+	.ndo_open		= enetc_open,
+	.ndo_stop		= enetc_close,
+	.ndo_start_xmit		= enetc_xmit,
+	.ndo_get_stats		= enetc_get_stats,
+	.ndo_set_mac_address	= enetc_pf_set_mac_addr,
+	.ndo_set_rx_mode	= enetc_pf_set_rx_mode,
+	.ndo_vlan_rx_add_vid	= enetc_vlan_rx_add_vid,
+	.ndo_vlan_rx_kill_vid	= enetc_vlan_rx_del_vid,
+	.ndo_set_vf_mac		= enetc_pf_set_vf_mac,
+	.ndo_set_vf_vlan	= enetc_pf_set_vf_vlan,
+	.ndo_set_vf_spoofchk	= enetc_pf_set_vf_spoofchk,
+	.ndo_set_features	= enetc_pf_set_features,
+};
+
+static void enetc_pf_netdev_setup(struct enetc_si *si, struct net_device *ndev,
+				  const struct net_device_ops *ndev_ops)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+
+	SET_NETDEV_DEV(ndev, &si->pdev->dev);
+	priv->ndev = ndev;
+	priv->si = si;
+	priv->dev = &si->pdev->dev;
+	si->ndev = ndev;
+
+	priv->msg_enable = (NETIF_MSG_WOL << 1) - 1;
+	ndev->netdev_ops = ndev_ops;
+	enetc_set_ethtool_ops(ndev);
+	ndev->watchdog_timeo = 5 * HZ;
+	ndev->max_mtu = ENETC_MAX_MTU;
+
+	ndev->hw_features = NETIF_F_RXCSUM | NETIF_F_HW_CSUM |
+			    NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
+			    NETIF_F_LOOPBACK;
+	ndev->features = NETIF_F_HIGHDMA | NETIF_F_SG |
+			 NETIF_F_RXCSUM | NETIF_F_HW_CSUM |
+			 NETIF_F_HW_VLAN_CTAG_TX |
+			 NETIF_F_HW_VLAN_CTAG_RX |
+			 NETIF_F_HW_VLAN_CTAG_FILTER;
+
+	if (si->errata & ENETC_ERR_TXCSUM) {
+		ndev->hw_features &= ~NETIF_F_HW_CSUM;
+		ndev->features &= ~NETIF_F_HW_CSUM;
+	}
+
+	ndev->priv_flags |= IFF_UNICAST_FLT;
+
+	/* pick up primary MAC address from SI */
+	enetc_get_primary_mac_addr(&si->hw, ndev->dev_addr);
+}
+
+static int enetc_of_get_phy(struct enetc_ndev_priv *priv)
+{
+	struct device_node *np = priv->dev->of_node;
+	int err;
+
+	if (!np) {
+		dev_err(priv->dev, "missing ENETC port node\n");
+		return -ENODEV;
+	}
+
+	priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
+	if (!priv->phy_node) {
+		if (!of_phy_is_fixed_link(np)) {
+			dev_err(priv->dev, "PHY not specified\n");
+			return -ENODEV;
+		}
+
+		err = of_phy_register_fixed_link(np);
+		if (err < 0) {
+			dev_err(priv->dev, "fixed link registration failed\n");
+			return err;
+		}
+
+		priv->phy_node = of_node_get(np);
+	}
+
+	priv->if_mode = of_get_phy_mode(np);
+	if (priv->if_mode < 0) {
+		dev_err(priv->dev, "missing phy type\n");
+		of_node_put(priv->phy_node);
+		if (of_phy_is_fixed_link(np))
+			of_phy_deregister_fixed_link(np);
+
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void enetc_of_put_phy(struct enetc_ndev_priv *priv)
+{
+	struct device_node *np = priv->dev->of_node;
+
+	if (np && of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
+	if (priv->phy_node)
+		of_node_put(priv->phy_node);
+}
+
+static int enetc_pf_probe(struct pci_dev *pdev,
+			  const struct pci_device_id *ent)
+{
+	struct enetc_ndev_priv *priv;
+	struct net_device *ndev;
+	struct enetc_si *si;
+	struct enetc_pf *pf;
+	int err;
+
+	if (pdev->dev.of_node && !of_device_is_available(pdev->dev.of_node)) {
+		dev_info(&pdev->dev, "device is disabled, skipping\n");
+		return -ENODEV;
+	}
+
+	err = enetc_pci_probe(pdev, KBUILD_MODNAME, sizeof(*pf));
+	if (err) {
+		dev_err(&pdev->dev, "PCI probing failed\n");
+		return err;
+	}
+
+	si = pci_get_drvdata(pdev);
+	if (!si->hw.port || !si->hw.global) {
+		err = -ENODEV;
+		dev_err(&pdev->dev, "could not map PF space, probing a VF?\n");
+		goto err_map_pf_space;
+	}
+
+	pf = enetc_si_priv(si);
+	pf->si = si;
+	pf->total_vfs = pci_sriov_get_totalvfs(pdev);
+
+	enetc_configure_port(pf);
+
+	enetc_get_si_caps(si);
+
+	ndev = alloc_etherdev_mq(sizeof(*priv), ENETC_MAX_NUM_TXQS);
+	if (!ndev) {
+		err = -ENOMEM;
+		dev_err(&pdev->dev, "netdev creation failed\n");
+		goto err_alloc_netdev;
+	}
+
+	enetc_pf_netdev_setup(si, ndev, &enetc_ndev_ops);
+
+	priv = netdev_priv(ndev);
+
+	enetc_init_si_rings_params(priv);
+
+	err = enetc_alloc_si_resources(priv);
+	if (err) {
+		dev_err(&pdev->dev, "SI resource alloc failed\n");
+		goto err_alloc_si_res;
+	}
+
+	err = enetc_alloc_msix(priv);
+	if (err) {
+		dev_err(&pdev->dev, "MSIX alloc failed\n");
+		goto err_alloc_msix;
+	}
+
+	err = enetc_of_get_phy(priv);
+	if (err)
+		dev_warn(&pdev->dev, "Fallback to PHY-less operation\n");
+
+	err = register_netdev(ndev);
+	if (err)
+		goto err_reg_netdev;
+
+	netif_carrier_off(ndev);
+
+	netif_info(priv, probe, ndev, "%s v%s\n",
+		   enetc_drv_name, enetc_drv_ver);
+
+	return 0;
+
+err_reg_netdev:
+	enetc_of_put_phy(priv);
+	enetc_free_msix(priv);
+err_alloc_msix:
+	enetc_free_si_resources(priv);
+err_alloc_si_res:
+	si->ndev = NULL;
+	free_netdev(ndev);
+err_alloc_netdev:
+err_map_pf_space:
+	enetc_pci_remove(pdev);
+
+	return err;
+}
+
+static void enetc_pf_remove(struct pci_dev *pdev)
+{
+	struct enetc_si *si = pci_get_drvdata(pdev);
+	struct enetc_pf *pf = enetc_si_priv(si);
+	struct enetc_ndev_priv *priv;
+
+	if (pf->num_vfs)
+		enetc_sriov_configure(pdev, 0);
+
+	priv = netdev_priv(si->ndev);
+	netif_info(priv, drv, si->ndev, "%s v%s remove\n",
+		   enetc_drv_name, enetc_drv_ver);
+
+	unregister_netdev(si->ndev);
+
+	enetc_of_put_phy(priv);
+
+	enetc_free_msix(priv);
+
+	enetc_free_si_resources(priv);
+
+	free_netdev(si->ndev);
+
+	enetc_pci_remove(pdev);
+}
+
+static const struct pci_device_id enetc_pf_id_table[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_DEV_ID_PF) },
+	{ 0, } /* End of table. */
+};
+MODULE_DEVICE_TABLE(pci, enetc_pf_id_table);
+
+static struct pci_driver enetc_pf_driver = {
+	.name = KBUILD_MODNAME,
+	.id_table = enetc_pf_id_table,
+	.probe = enetc_pf_probe,
+	.remove = enetc_pf_remove,
+#ifdef CONFIG_PCI_IOV
+	.sriov_configure = enetc_sriov_configure,
+#endif
+};
+module_pci_driver(enetc_pf_driver);
+
+MODULE_DESCRIPTION(ENETC_DRV_NAME_STR);
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(ENETC_DRV_VER_STR);

drivers/net/ethernet/freescale/enetc/enetc_pf.h

+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+/* Copyright 2017-2019 NXP */
+
+#include "enetc.h"
+
+#define ENETC_PF_NUM_RINGS	8
+
+enum enetc_mac_addr_type {UC, MC, MADDR_TYPE};
+#define ENETC_MAX_NUM_MAC_FLT	((ENETC_MAX_NUM_VFS + 1) * MADDR_TYPE)
+
+#define ENETC_MADDR_HASH_TBL_SZ	64
+struct enetc_mac_filter {
+	union {
+		char mac_addr[ETH_ALEN];
+		DECLARE_BITMAP(mac_hash_table, ENETC_MADDR_HASH_TBL_SZ);
+	};
+	int mac_addr_cnt;
+};
+
+#define ENETC_VLAN_HT_SIZE	64
+
+struct enetc_pf {
+	struct enetc_si *si;
+	int num_vfs; /* number of active VFs, after sriov_init */
+	int total_vfs; /* max number of VFs, set for PF at probe */
+
+	struct enetc_mac_filter mac_filter[ENETC_MAX_NUM_MAC_FLT];
+
+	char vlan_promisc_simap; /* bitmap of SIs in VLAN promisc mode */
+	DECLARE_BITMAP(vlan_ht_filter, ENETC_VLAN_HT_SIZE);
+	DECLARE_BITMAP(active_vlans, VLAN_N_VID);
+};

drivers/net/ethernet/freescale/enetc/enetc_vf.c

+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/* Copyright 2017-2019 NXP */
+
+#include <linux/module.h>
+#include "enetc.h"
+
+#define ENETC_DRV_VER_MAJ 1
+#define ENETC_DRV_VER_MIN 0
+
+#define ENETC_DRV_VER_STR __stringify(ENETC_DRV_VER_MAJ) "." \
+			  __stringify(ENETC_DRV_VER_MIN)
+static const char enetc_drv_ver[] = ENETC_DRV_VER_STR;
+#define ENETC_DRV_NAME_STR "ENETC VF driver"
+static const char enetc_drv_name[] = ENETC_DRV_NAME_STR;
+
+/* Probing/ Init */
+static const struct net_device_ops enetc_ndev_ops = {
+	.ndo_open		= enetc_open,
+	.ndo_stop		= enetc_close,
+	.ndo_start_xmit		= enetc_xmit,
+	.ndo_get_stats		= enetc_get_stats,
+};
+
+static void enetc_vf_netdev_setup(struct enetc_si *si, struct net_device *ndev,
+				  const struct net_device_ops *ndev_ops)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+
+	SET_NETDEV_DEV(ndev, &si->pdev->dev);
+	priv->ndev = ndev;
+	priv->si = si;
+	priv->dev = &si->pdev->dev;
+	si->ndev = ndev;
+
+	priv->msg_enable = (NETIF_MSG_IFUP << 1) - 1;
+	ndev->netdev_ops = ndev_ops;
+	enetc_set_ethtool_ops(ndev);
+	ndev->watchdog_timeo = 5 * HZ;
+	ndev->max_mtu = ENETC_MAX_MTU;
+
+	ndev->hw_features = NETIF_F_RXCSUM | NETIF_F_HW_CSUM |
+			    NETIF_F_HW_VLAN_CTAG_TX |
+			    NETIF_F_HW_VLAN_CTAG_RX;
+	ndev->features = NETIF_F_HIGHDMA | NETIF_F_SG |
+			 NETIF_F_RXCSUM | NETIF_F_HW_CSUM |
+			 NETIF_F_HW_VLAN_CTAG_TX |
+			 NETIF_F_HW_VLAN_CTAG_RX;
+
+	if (si->errata & ENETC_ERR_TXCSUM) {
+		ndev->hw_features &= ~NETIF_F_HW_CSUM;
+		ndev->features &= ~NETIF_F_HW_CSUM;
+	}
+
+	/* pick up primary MAC address from SI */
+	enetc_get_primary_mac_addr(&si->hw, ndev->dev_addr);
+}
+
+static int enetc_vf_probe(struct pci_dev *pdev,
+			  const struct pci_device_id *ent)
+{
+	struct enetc_ndev_priv *priv;
+	struct net_device *ndev;
+	struct enetc_si *si;
+	int err;
+
+	err = enetc_pci_probe(pdev, KBUILD_MODNAME, 0);
+	if (err) {
+		dev_err(&pdev->dev, "PCI probing failed\n");
+		return err;
+	}
+
+	si = pci_get_drvdata(pdev);
+
+	enetc_get_si_caps(si);
+
+	ndev = alloc_etherdev_mq(sizeof(*priv), ENETC_MAX_NUM_TXQS);
+	if (!ndev) {
+		err = -ENOMEM;
+		dev_err(&pdev->dev, "netdev creation failed\n");
+		goto err_alloc_netdev;
+	}
+
+	enetc_vf_netdev_setup(si, ndev, &enetc_ndev_ops);
+
+	priv = netdev_priv(ndev);
+
+	enetc_init_si_rings_params(priv);
+
+	err = enetc_alloc_si_resources(priv);
+	if (err) {
+		dev_err(&pdev->dev, "SI resource alloc failed\n");
+		goto err_alloc_si_res;
+	}
+
+	err = enetc_alloc_msix(priv);
+	if (err) {
+		dev_err(&pdev->dev, "MSIX alloc failed\n");
+		goto err_alloc_msix;
+	}
+
+	err = register_netdev(ndev);
+	if (err)
+		goto err_reg_netdev;
+
+	netif_carrier_off(ndev);
+
+	netif_info(priv, probe, ndev, "%s v%s\n",
+		   enetc_drv_name, enetc_drv_ver);
+
+	return 0;
+
+err_reg_netdev:
+	enetc_free_msix(priv);
+err_alloc_msix:
+	enetc_free_si_resources(priv);
+err_alloc_si_res:
+	si->ndev = NULL;
+	free_netdev(ndev);
+err_alloc_netdev:
+	enetc_pci_remove(pdev);
+
+	return err;
+}
+
+static void enetc_vf_remove(struct pci_dev *pdev)
+{
+	struct enetc_si *si = pci_get_drvdata(pdev);
+	struct enetc_ndev_priv *priv;
+
+	priv = netdev_priv(si->ndev);
+	netif_info(priv, drv, si->ndev, "%s v%s remove\n",
+		   enetc_drv_name, enetc_drv_ver);
+	unregister_netdev(si->ndev);
+
+	enetc_free_msix(priv);
+
+	enetc_free_si_resources(priv);
+
+	free_netdev(si->ndev);
+
+	enetc_pci_remove(pdev);
+}
+
+static const struct pci_device_id enetc_vf_id_table[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_DEV_ID_VF) },
+	{ 0, } /* End of table. */
+};
+MODULE_DEVICE_TABLE(pci, enetc_vf_id_table);
+
+static struct pci_driver enetc_vf_driver = {
+	.name = KBUILD_MODNAME,
+	.id_table = enetc_vf_id_table,
+	.probe = enetc_vf_probe,
+	.remove = enetc_vf_remove,
+};
+module_pci_driver(enetc_vf_driver);
+
+MODULE_DESCRIPTION(ENETC_DRV_NAME_STR);
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(ENETC_DRV_VER_STR);