From: Madalin Bucur <madalin.bucur@freescale.com>
To: <netdev@vger.kernel.org>
CC: <linuxppc-dev@lists.ozlabs.org>, <linux-kernel@vger.kernel.org>,
        <davem@davemloft.net>, <scottwood@freescale.com>,
        <igal.liberman@freescale.com>, <roy.pledge@freescale.com>,
        <ppc@mindchasers.com>, <joe@perches.com>, <pebolle@tiscali.nl>,
        <joakim.tjernlund@transmode.se>, <gregkh@linuxfoundation.org>,
        Madalin Bucur <madalin.bucur@freescale.com>
Subject: [net-next v4 2/8] dpaa_eth: add support for DPAA Ethernet
Date: Mon, 2 Nov 2015 19:31:34 +0200
Message-ID: <1446485500-9782-3-git-send-email-madalin.bucur@freescale.com>
In-Reply-To: <1446485500-9782-1-git-send-email-madalin.bucur@freescale.com>
References: <1446485500-9782-1-git-send-email-madalin.bucur@freescale.com>
Reply-To: <madalin.bucur@freescale.com>
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This introduces the Freescale Data Path Acceleration Architecture
(DPAA) Ethernet driver (dpaa_eth) that builds upon the DPAA QMan,
BMan, PAMU and FMan drivers to deliver Ethernet connectivity on
the Freescale DPAA QorIQ platforms.

Signed-off-by: Madalin Bucur <madalin.bucur@freescale.com>
---
 drivers/net/ethernet/freescale/Kconfig             |    2 +
 drivers/net/ethernet/freescale/Makefile            |    1 +
 drivers/net/ethernet/freescale/dpaa/Kconfig        |   22 +
 drivers/net/ethernet/freescale/dpaa/Makefile       |   11 +
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c     |  819 ++++++++++++
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.h     |  432 +++++++
 .../net/ethernet/freescale/dpaa/dpaa_eth_common.c  | 1299 ++++++++++++++++++++
 .../net/ethernet/freescale/dpaa/dpaa_eth_common.h  |   98 ++
 drivers/net/ethernet/freescale/dpaa/dpaa_eth_sg.c  |  408 ++++++
 9 files changed, 3092 insertions(+)
 create mode 100644 drivers/net/ethernet/freescale/dpaa/Kconfig
 create mode 100644 drivers/net/ethernet/freescale/dpaa/Makefile
 create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
 create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
 create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c
 create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.h
 create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_eth_sg.c

diff --git a/drivers/net/ethernet/freescale/Kconfig b/drivers/net/ethernet/freescale/Kconfig
index f3f89cc..92198be 100644
--- a/drivers/net/ethernet/freescale/Kconfig
+++ b/drivers/net/ethernet/freescale/Kconfig
@@ -92,4 +92,6 @@ config GIANFAR
 	  and MPC86xx family of chips, the eTSEC on LS1021A and the FEC
 	  on the 8540.
 
+source "drivers/net/ethernet/freescale/dpaa/Kconfig"
+
 endif # NET_VENDOR_FREESCALE
diff --git a/drivers/net/ethernet/freescale/Makefile b/drivers/net/ethernet/freescale/Makefile
index 4097c58..ae13dc5 100644
--- a/drivers/net/ethernet/freescale/Makefile
+++ b/drivers/net/ethernet/freescale/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_FS_ENET) += fs_enet/
 obj-$(CONFIG_FSL_PQ_MDIO) += fsl_pq_mdio.o
 obj-$(CONFIG_FSL_XGMAC_MDIO) += xgmac_mdio.o
 obj-$(CONFIG_GIANFAR) += gianfar_driver.o
+obj-$(CONFIG_FSL_DPAA_ETH) += dpaa/
 obj-$(CONFIG_PTP_1588_CLOCK_GIANFAR) += gianfar_ptp.o
 gianfar_driver-objs := gianfar.o \
 		gianfar_ethtool.o
diff --git a/drivers/net/ethernet/freescale/dpaa/Kconfig b/drivers/net/ethernet/freescale/dpaa/Kconfig
new file mode 100644
index 0000000..022d5aa
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/Kconfig
@@ -0,0 +1,22 @@
+menuconfig FSL_DPAA_ETH
+	tristate "DPAA Ethernet"
+	depends on FSL_SOC && FSL_BMAN && FSL_QMAN && FSL_FMAN
+	select PHYLIB
+	select FSL_FMAN_MAC
+	---help---
+	  Data Path Acceleration Architecture Ethernet driver,
+	  supporting the Freescale QorIQ chips.
+	  Depends on Freescale Buffer Manager and Queue Manager
+	  driver and Frame Manager Driver.
+
+if FSL_DPAA_ETH
+
+config FSL_DPAA_ETH_FRIENDLY_IF_NAME
+	bool "Use fmX-macY names for the DPAA interfaces"
+	default y
+	---help---
+	  The DPAA Ethernet netdevices are created for each FMan port available
+	  on a certain board. Enable this to get interface names derived from
+	  the underlying FMan hardware for a simple identification.
+
+endif # FSL_DPAA_ETH
diff --git a/drivers/net/ethernet/freescale/dpaa/Makefile b/drivers/net/ethernet/freescale/dpaa/Makefile
new file mode 100644
index 0000000..3847ec7
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for the Freescale DPAA Ethernet controllers
+#
+
+# Include FMan headers
+FMAN        = $(srctree)/drivers/net/ethernet/freescale/fman
+ccflags-y += -I$(FMAN)
+
+obj-$(CONFIG_FSL_DPAA_ETH) += fsl_dpa.o
+
+fsl_dpa-objs += dpaa_eth.o dpaa_eth_sg.o dpaa_eth_common.o
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
new file mode 100644
index 0000000..8381616
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
@@ -0,0 +1,819 @@
+/* Copyright 2008 - 2015 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *	 notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *	 notice, this list of conditions and the following disclaimer in the
+ *	 documentation and/or other materials provided with the distribution.
+ *     * Neither the name of Freescale Semiconductor nor the
+ *	 names of its contributors may be used to endorse or promote products
+ *	 derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <linux/kthread.h>
+#include <linux/io.h>
+#include <linux/if_arp.h>
+#include <linux/if_vlan.h>
+#include <linux/icmp.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/udp.h>
+#include <linux/tcp.h>
+#include <linux/net.h>
+#include <linux/if_ether.h>
+#include <linux/highmem.h>
+#include <linux/percpu.h>
+#include <linux/dma-mapping.h>
+#include <soc/fsl/bman.h>
+
+#include "fman.h"
+#include "fman_port.h"
+
+#include "mac.h"
+#include "dpaa_eth.h"
+#include "dpaa_eth_common.h"
+
+/* Valid checksum indication */
+#define DPA_CSUM_VALID		0xFFFF
+
+#define DPA_DESCRIPTION "FSL DPAA Ethernet driver"
+
+#define DPAA_INGRESS_CS_THRESHOLD 0x10000000
+/* Ingress congestion threshold on FMan ports
+ * The size in bytes of the ingress tail-drop threshold on FMan ports.
+ * Traffic piling up above this value will be rejected by QMan and discarded
+ * by FMan.
+ */
+
+static u8 debug = -1;
+module_param(debug, byte, S_IRUGO);
+MODULE_PARM_DESC(debug, "Module/Driver verbosity level");
+
+/* This has to work in tandem with the DPA_CS_THRESHOLD_xxx values. */
+static u16 tx_timeout = 1000;
+module_param(tx_timeout, ushort, S_IRUGO);
+MODULE_PARM_DESC(tx_timeout, "The Tx timeout in ms");
+
+/* BM */
+
+#define DPAA_ETH_MAX_PAD (L1_CACHE_BYTES * 8)
+
+static u8 dpa_priv_common_bpid;
+
+static void _dpa_rx_error(struct net_device *net_dev,
+			  const struct dpa_priv_s *priv,
+			  struct dpa_percpu_priv_s *percpu_priv,
+			  const struct qm_fd *fd,
+			  u32 fqid)
+{
+	/* limit common, possibly innocuous Rx FIFO Overflow errors'
+	 * interference with zero-loss convergence benchmark results.
+	 */
+	if (likely(fd->status & FM_FD_ERR_PHYSICAL))
+		pr_warn_once("non-zero error counters in fman statistics (sysfs)\n");
+	else
+		if (net_ratelimit())
+			netif_err(priv, hw, net_dev, "Err FD status = 0x%08x\n",
+				  fd->status & FM_FD_STAT_RX_ERRORS);
+
+	percpu_priv->stats.rx_errors++;
+
+	dpa_fd_release(net_dev, fd);
+}
+
+static void _dpa_tx_error(struct net_device *net_dev,
+			  const struct dpa_priv_s *priv,
+			  struct dpa_percpu_priv_s *percpu_priv,
+			  const struct qm_fd *fd,
+			  u32 fqid)
+{
+	struct sk_buff *skb;
+
+	if (net_ratelimit())
+		netif_warn(priv, hw, net_dev, "FD status = 0x%08x\n",
+			   fd->status & FM_FD_STAT_TX_ERRORS);
+
+	percpu_priv->stats.tx_errors++;
+
+	/* If we intended the buffers from this frame to go into the bpools
+	 * when the FMan transmit was done, we need to put it in manually.
+	 */
+	if (fd->bpid != 0xff) {
+		dpa_fd_release(net_dev, fd);
+		return;
+	}
+
+	skb = _dpa_cleanup_tx_fd(priv, fd);
+	dev_kfree_skb(skb);
+}
+
+static int dpaa_eth_poll(struct napi_struct *napi, int budget)
+{
+	struct dpa_napi_portal *np =
+			container_of(napi, struct dpa_napi_portal, napi);
+
+	int cleaned = qman_p_poll_dqrr(np->p, budget);
+
+	if (cleaned < budget) {
+		int tmp;
+
+		napi_complete(napi);
+		tmp = qman_p_irqsource_add(np->p, QM_PIRQ_DQRI);
+		DPA_ERR_ON(tmp);
+	} else if (np->down) {
+		qman_p_irqsource_add(np->p, QM_PIRQ_DQRI);
+	}
+
+	return cleaned;
+}
+
+static void _dpa_tx_conf(struct net_device *net_dev,
+			 const struct dpa_priv_s *priv,
+			 struct dpa_percpu_priv_s *percpu_priv,
+			 const struct qm_fd *fd,
+			 u32 fqid)
+{
+	struct sk_buff	*skb;
+
+	if (unlikely(fd->status & FM_FD_STAT_TX_ERRORS) != 0) {
+		if (net_ratelimit())
+			netif_warn(priv, hw, net_dev, "FD status = 0x%08x\n",
+				   fd->status & FM_FD_STAT_TX_ERRORS);
+
+		percpu_priv->stats.tx_errors++;
+	}
+
+	skb = _dpa_cleanup_tx_fd(priv, fd);
+
+	dev_kfree_skb(skb);
+}
+
+static enum qman_cb_dqrr_result
+priv_rx_error_dqrr(struct qman_portal *portal,
+		   struct qman_fq *fq,
+		   const struct qm_dqrr_entry *dq)
+{
+	struct net_device *net_dev;
+	struct dpa_priv_s *priv;
+	struct dpa_percpu_priv_s *percpu_priv;
+	int *count_ptr;
+
+	net_dev = ((struct dpa_fq *)fq)->net_dev;
+	priv = netdev_priv(net_dev);
+
+	percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+	count_ptr = raw_cpu_ptr(priv->dpa_bp->percpu_count);
+
+	if (dpaa_eth_napi_schedule(percpu_priv, portal))
+		return qman_cb_dqrr_stop;
+
+	if (unlikely(dpaa_eth_refill_bpools(priv->dpa_bp, count_ptr)))
+		/* Unable to refill the buffer pool due to insufficient
+		 * system memory. Just release the frame back into the pool,
+		 * otherwise we'll soon end up with an empty buffer pool.
+		 */
+		dpa_fd_release(net_dev, &dq->fd);
+	else
+		_dpa_rx_error(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
+
+	return qman_cb_dqrr_consume;
+}
+
+static enum qman_cb_dqrr_result
+priv_rx_default_dqrr(struct qman_portal *portal,
+		     struct qman_fq *fq,
+		     const struct qm_dqrr_entry *dq)
+{
+	struct net_device *net_dev;
+	struct dpa_priv_s *priv;
+	struct dpa_percpu_priv_s *percpu_priv;
+	int *count_ptr;
+	struct dpa_bp *dpa_bp;
+
+	net_dev = ((struct dpa_fq *)fq)->net_dev;
+	priv = netdev_priv(net_dev);
+	dpa_bp = priv->dpa_bp;
+
+	/* IRQ handler, non-migratable; safe to use raw_cpu_ptr here */
+	percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+	count_ptr = raw_cpu_ptr(dpa_bp->percpu_count);
+
+	if (unlikely(dpaa_eth_napi_schedule(percpu_priv, portal)))
+		return qman_cb_dqrr_stop;
+
+	/* Vale of plenty: make sure we didn't run out of buffers */
+
+	if (unlikely(dpaa_eth_refill_bpools(dpa_bp, count_ptr)))
+		/* Unable to refill the buffer pool due to insufficient
+		 * system memory. Just release the frame back into the pool,
+		 * otherwise we'll soon end up with an empty buffer pool.
+		 */
+		dpa_fd_release(net_dev, &dq->fd);
+	else
+		_dpa_rx(net_dev, portal, priv, percpu_priv, &dq->fd, fq->fqid,
+			count_ptr);
+
+	return qman_cb_dqrr_consume;
+}
+
+static enum qman_cb_dqrr_result
+priv_tx_conf_error_dqrr(struct qman_portal *portal,
+			struct qman_fq *fq,
+			const struct qm_dqrr_entry *dq)
+{
+	struct net_device *net_dev;
+	struct dpa_priv_s *priv;
+	struct dpa_percpu_priv_s *percpu_priv;
+
+	net_dev = ((struct dpa_fq *)fq)->net_dev;
+	priv = netdev_priv(net_dev);
+
+	percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+
+	if (dpaa_eth_napi_schedule(percpu_priv, portal))
+		return qman_cb_dqrr_stop;
+
+	_dpa_tx_error(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
+
+	return qman_cb_dqrr_consume;
+}
+
+static enum qman_cb_dqrr_result
+priv_tx_conf_default_dqrr(struct qman_portal *portal,
+			  struct qman_fq *fq,
+			  const struct qm_dqrr_entry *dq)
+{
+	struct net_device *net_dev;
+	struct dpa_priv_s *priv;
+	struct dpa_percpu_priv_s *percpu_priv;
+
+	net_dev = ((struct dpa_fq *)fq)->net_dev;
+	priv = netdev_priv(net_dev);
+
+	/* Non-migratable context, safe to use raw_cpu_ptr */
+	percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+
+	if (dpaa_eth_napi_schedule(percpu_priv, portal))
+		return qman_cb_dqrr_stop;
+
+	_dpa_tx_conf(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
+
+	return qman_cb_dqrr_consume;
+}
+
+static void priv_ern(struct qman_portal *portal,
+		     struct qman_fq *fq,
+		     const struct qm_mr_entry *msg)
+{
+	struct net_device *net_dev;
+	const struct dpa_priv_s *priv;
+	struct sk_buff *skb;
+	struct dpa_percpu_priv_s *percpu_priv;
+	const struct qm_fd *fd = &msg->ern.fd;
+
+	net_dev = ((struct dpa_fq *)fq)->net_dev;
+	priv = netdev_priv(net_dev);
+	/* Non-migratable context, safe to use raw_cpu_ptr */
+	percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+
+	percpu_priv->stats.tx_dropped++;
+	percpu_priv->stats.tx_fifo_errors++;
+
+	/* If we intended this buffer to go into the pool
+	 * when the FM was done, we need to put it in
+	 * manually.
+	 */
+	if (msg->ern.fd.bpid != 0xff) {
+		dpa_fd_release(net_dev, fd);
+		return;
+	}
+
+	skb = _dpa_cleanup_tx_fd(priv, fd);
+	dev_kfree_skb_any(skb);
+}
+
+static const struct dpa_fq_cbs_t private_fq_cbs = {
+	.rx_defq = { .cb = { .dqrr = priv_rx_default_dqrr } },
+	.tx_defq = { .cb = { .dqrr = priv_tx_conf_default_dqrr } },
+	.rx_errq = { .cb = { .dqrr = priv_rx_error_dqrr } },
+	.tx_errq = { .cb = { .dqrr = priv_tx_conf_error_dqrr } },
+	.egress_ern = { .cb = { .ern = priv_ern } }
+};
+
+static void dpaa_eth_napi_enable(struct dpa_priv_s *priv)
+{
+	struct dpa_percpu_priv_s *percpu_priv;
+	int i, j;
+
+	for_each_possible_cpu(i) {
+		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+
+		for (j = 0; j < qman_portal_max; j++) {
+			percpu_priv->np[j].down = 0;
+			napi_enable(&percpu_priv->np[j].napi);
+		}
+	}
+}
+
+static void dpaa_eth_napi_disable(struct dpa_priv_s *priv)
+{
+	struct dpa_percpu_priv_s *percpu_priv;
+	int i, j;
+
+	for_each_possible_cpu(i) {
+		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+
+		for (j = 0; j < qman_portal_max; j++) {
+			percpu_priv->np[j].down = 1;
+			napi_disable(&percpu_priv->np[j].napi);
+		}
+	}
+}
+
+static int dpa_eth_priv_start(struct net_device *net_dev)
+{
+	struct dpa_priv_s *priv;
+	int err;
+
+	priv = netdev_priv(net_dev);
+	dpaa_eth_napi_enable(priv);
+
+	err = dpa_start(net_dev);
+	if (err < 0)
+		dpaa_eth_napi_disable(priv);
+
+	return err;
+}
+
+static int dpa_eth_priv_stop(struct net_device *net_dev)
+{
+	struct dpa_priv_s *priv;
+	int err;
+
+	err = dpa_stop(net_dev);
+
+	priv = netdev_priv(net_dev);
+	dpaa_eth_napi_disable(priv);
+
+	return err;
+}
+
+static const struct net_device_ops dpa_private_ops = {
+	.ndo_open = dpa_eth_priv_start,
+	.ndo_start_xmit = dpa_tx,
+	.ndo_stop = dpa_eth_priv_stop,
+	.ndo_tx_timeout = dpa_timeout,
+	.ndo_get_stats64 = dpa_get_stats64,
+	.ndo_set_mac_address = dpa_set_mac_address,
+	.ndo_validate_addr = eth_validate_addr,
+	.ndo_change_mtu = dpa_change_mtu,
+	.ndo_set_rx_mode = dpa_set_rx_mode,
+	.ndo_init = dpa_ndo_init,
+	.ndo_set_features = dpa_set_features,
+	.ndo_fix_features = dpa_fix_features,
+};
+
+static int dpa_private_napi_add(struct net_device *net_dev)
+{
+	struct dpa_priv_s *priv = netdev_priv(net_dev);
+	struct dpa_percpu_priv_s *percpu_priv;
+	int i, cpu;
+
+	for_each_possible_cpu(cpu) {
+		percpu_priv = per_cpu_ptr(priv->percpu_priv, cpu);
+
+		percpu_priv->np = devm_kzalloc(net_dev->dev.parent,
+			qman_portal_max * sizeof(struct dpa_napi_portal),
+			GFP_KERNEL);
+
+		if (!percpu_priv->np)
+			return -ENOMEM;
+
+		for (i = 0; i < qman_portal_max; i++)
+			netif_napi_add(net_dev, &percpu_priv->np[i].napi,
+				       dpaa_eth_poll, NAPI_POLL_WEIGHT);
+	}
+
+	return 0;
+}
+
+void dpa_private_napi_del(struct net_device *net_dev)
+{
+	struct dpa_priv_s *priv = netdev_priv(net_dev);
+	struct dpa_percpu_priv_s *percpu_priv;
+	int i, cpu;
+
+	for_each_possible_cpu(cpu) {
+		percpu_priv = per_cpu_ptr(priv->percpu_priv, cpu);
+
+		if (percpu_priv->np) {
+			for (i = 0; i < qman_portal_max; i++)
+				netif_napi_del(&percpu_priv->np[i].napi);
+
+			devm_kfree(net_dev->dev.parent, percpu_priv->np);
+		}
+	}
+}
+
+static int dpa_private_netdev_init(struct net_device *net_dev)
+{
+	int i;
+	struct dpa_priv_s *priv = netdev_priv(net_dev);
+	struct dpa_percpu_priv_s *percpu_priv;
+	const u8 *mac_addr;
+
+	/* Although we access another CPU's private data here
+	 * we do it at initialization so it is safe
+	 */
+	for_each_possible_cpu(i) {
+		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+		percpu_priv->net_dev = net_dev;
+	}
+
+	net_dev->netdev_ops = &dpa_private_ops;
+	mac_addr = priv->mac_dev->addr;
+
+	net_dev->mem_start = priv->mac_dev->res->start;
+	net_dev->mem_end = priv->mac_dev->res->end;
+
+	net_dev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+				 NETIF_F_LLTX);
+
+	net_dev->features |= NETIF_F_GSO;
+
+	return dpa_netdev_init(net_dev, mac_addr, tx_timeout);
+}
+
+static struct dpa_bp *dpa_priv_bp_probe(struct device *dev)
+{
+	struct dpa_bp *dpa_bp;
+
+	dpa_bp = devm_kzalloc(dev, sizeof(*dpa_bp), GFP_KERNEL);
+	if (!dpa_bp)
+		return ERR_PTR(-ENOMEM);
+
+	dpa_bp->percpu_count = devm_alloc_percpu(dev, *dpa_bp->percpu_count);
+	dpa_bp->config_count = FSL_DPAA_ETH_MAX_BUF_COUNT;
+
+	dpa_bp->seed_cb = dpa_bp_priv_seed;
+	dpa_bp->free_buf_cb = _dpa_bp_free_pf;
+
+	return dpa_bp;
+}
+
+/* Place all ingress FQs (Rx Default, Rx Error) in a dedicated CGR.
+ * We won't be sending congestion notifications to FMan; for now, we just use
+ * this CGR to generate enqueue rejections to FMan in order to drop the frames
+ * before they reach our ingress queues and eat up memory.
+ */
+static int dpaa_eth_priv_ingress_cgr_init(struct dpa_priv_s *priv)
+{
+	struct qm_mcc_initcgr initcgr;
+	u32 cs_th;
+	int err;
+
+	err = qman_alloc_cgrid(&priv->ingress_cgr.cgrid);
+	if (err < 0) {
+		pr_err("Error %d allocating CGR ID\n", err);
+		goto out_error;
+	}
+
+	/* Enable CS TD, but disable Congestion State Change Notifications. */
+	initcgr.we_mask = QM_CGR_WE_CS_THRES;
+	initcgr.cgr.cscn_en = QM_CGR_EN;
+	cs_th = DPAA_INGRESS_CS_THRESHOLD;
+	qm_cgr_cs_thres_set64(&initcgr.cgr.cs_thres, cs_th, 1);
+
+	initcgr.we_mask |= QM_CGR_WE_CSTD_EN;
+	initcgr.cgr.cstd_en = QM_CGR_EN;
+
+	/* This is actually a hack, because this CGR will be associated with
+	 * our affine SWP. However, we'll place our ingress FQs in it.
+	 */
+	err = qman_create_cgr(&priv->ingress_cgr, QMAN_CGR_FLAG_USE_INIT,
+			      &initcgr);
+	if (err < 0) {
+		pr_err("Error %d creating ingress CGR with ID %d\n", err,
+		       priv->ingress_cgr.cgrid);
+		qman_release_cgrid(priv->ingress_cgr.cgrid);
+		goto out_error;
+	}
+	pr_debug("Created ingress CGR %d for netdev with hwaddr %pM\n",
+		 priv->ingress_cgr.cgrid, priv->mac_dev->addr);
+
+	/* struct qman_cgr allows special cgrid values (i.e. outside the 0..255
+	 * range), but we have no common initialization path between the
+	 * different variants of the DPAA Eth driver, so we do it here rather
+	 * than modifying every other variant than "private Eth".
+	 */
+	priv->use_ingress_cgr = true;
+
+out_error:
+	return err;
+}
+
+static int dpa_priv_bp_create(struct net_device *net_dev, struct dpa_bp *dpa_bp,
+			      size_t count)
+{
+	struct dpa_priv_s *priv = netdev_priv(net_dev);
+	int i;
+
+	netif_dbg(priv, probe, net_dev,
+		  "Using private BM buffer pools\n");
+
+	priv->bp_count = count;
+
+	for (i = 0; i < count; i++) {
+		int err;
+
+		err = dpa_bp_alloc(&dpa_bp[i]);
+		if (err < 0) {
+			dpa_bp_free(priv);
+			priv->dpa_bp = NULL;
+			return err;
+		}
+
+		priv->dpa_bp = &dpa_bp[i];
+	}
+
+	dpa_priv_common_bpid = priv->dpa_bp->bpid;
+	return 0;
+}
+
+static const struct of_device_id dpa_match[];
+
+static int
+dpaa_eth_priv_probe(struct platform_device *pdev)
+{
+	int err = 0, i, channel;
+	struct device *dev;
+	struct dpa_bp *dpa_bp;
+	struct dpa_fq *dpa_fq, *tmp;
+	size_t count = 1;
+	struct net_device *net_dev = NULL;
+	struct dpa_priv_s *priv = NULL;
+	struct dpa_percpu_priv_s *percpu_priv;
+	struct fm_port_fqs port_fqs;
+	struct dpa_buffer_layout_s *buf_layout = NULL;
+	struct mac_device *mac_dev;
+	struct task_struct *kth;
+
+	dev = &pdev->dev;
+
+	/* Get the buffer pool assigned to this interface;
+	 * run only once the default pool probing code
+	 */
+	dpa_bp = (dpa_bpid2pool(dpa_priv_common_bpid)) ? :
+			dpa_priv_bp_probe(dev);
+	if (IS_ERR(dpa_bp))
+		return PTR_ERR(dpa_bp);
+
+	/* Allocate this early, so we can store relevant information in
+	 * the private area
+	 */
+	net_dev = alloc_etherdev_mq(sizeof(*priv), DPAA_ETH_TX_QUEUES);
+	if (!net_dev) {
+		dev_err(dev, "alloc_etherdev_mq() failed\n");
+		goto alloc_etherdev_mq_failed;
+	}
+
+#ifdef CONFIG_FSL_DPAA_ETH_FRIENDLY_IF_NAME
+	snprintf(net_dev->name, IFNAMSIZ, "fm%d-mac%d",
+		 dpa_mac_fman_index_get(pdev),
+		 dpa_mac_hw_index_get(pdev));
+#endif
+
+	/* Do this here, so we can be verbose early */
+	SET_NETDEV_DEV(net_dev, dev);
+	dev_set_drvdata(dev, net_dev);
+
+	priv = netdev_priv(net_dev);
+	priv->net_dev = net_dev;
+
+	priv->msg_enable = netif_msg_init(debug, -1);
+
+	mac_dev = dpa_mac_dev_get(pdev);
+	if (IS_ERR(mac_dev) || !mac_dev) {
+		err = PTR_ERR(mac_dev);
+		goto mac_probe_failed;
+	}
+
+	/* We have physical ports, so we need to establish
+	 * the buffer layout.
+	 */
+	buf_layout = devm_kzalloc(dev, 2 * sizeof(*buf_layout),
+				  GFP_KERNEL);
+	if (!buf_layout)
+		goto alloc_failed;
+
+	dpa_set_buffers_layout(mac_dev, buf_layout);
+
+	/* For private ports, need to compute the size of the default
+	 * buffer pool, based on FMan port buffer layout;also update
+	 * the maximum buffer size for private ports if necessary
+	 */
+	dpa_bp->size = dpa_bp_size(&buf_layout[RX]);
+
+	INIT_LIST_HEAD(&priv->dpa_fq_list);
+
+	memset(&port_fqs, 0, sizeof(port_fqs));
+
+	err = dpa_fq_probe_mac(dev, &priv->dpa_fq_list, &port_fqs, true, RX);
+	if (!err)
+		err = dpa_fq_probe_mac(dev, &priv->dpa_fq_list,
+				       &port_fqs, true, TX);
+
+	if (err < 0)
+		goto fq_probe_failed;
+
+	/* bp init */
+
+	err = dpa_priv_bp_create(net_dev, dpa_bp, count);
+
+	if (err < 0)
+		goto bp_create_failed;
+
+	priv->mac_dev = mac_dev;
+
+	channel = dpa_get_channel();
+
+	if (channel < 0) {
+		err = channel;
+		goto get_channel_failed;
+	}
+
+	priv->channel = (u16)channel;
+
+	/* Start a thread that will walk the cpus with affine portals
+	 * and add this pool channel to each's dequeue mask.
+	 */
+	kth = kthread_run(dpaa_eth_add_channel,
+			  (void *)(unsigned long)priv->channel,
+			  "dpaa_%p:%d", net_dev, priv->channel);
+	if (!kth) {
+		err = -ENOMEM;
+		goto add_channel_failed;
+	}
+
+	dpa_fq_setup(priv, &private_fq_cbs, priv->mac_dev->port[TX]);
+
+	/* Create a congestion group for this netdev, with
+	 * dynamically-allocated CGR ID.
+	 * Must be executed after probing the MAC, but before
+	 * assigning the egress FQs to the CGRs.
+	 */
+	err = dpaa_eth_cgr_init(priv);
+	if (err < 0) {
+		dev_err(dev, "Error initializing CGR\n");
+		goto tx_cgr_init_failed;
+	}
+	err = dpaa_eth_priv_ingress_cgr_init(priv);
+	if (err < 0) {
+		dev_err(dev, "Error initializing ingress CGR\n");
+		goto rx_cgr_init_failed;
+	}
+
+	/* Add the FQs to the interface, and make them active */
+	list_for_each_entry_safe(dpa_fq, tmp, &priv->dpa_fq_list, list) {
+		err = dpa_fq_init(dpa_fq, false);
+		if (err < 0)
+			goto fq_alloc_failed;
+	}
+
+	priv->buf_layout = buf_layout;
+	priv->tx_headroom = dpa_get_headroom(&priv->buf_layout[TX]);
+	priv->rx_headroom = dpa_get_headroom(&priv->buf_layout[RX]);
+
+	/* All real interfaces need their ports initialized */
+	dpaa_eth_init_ports(mac_dev, dpa_bp, count, &port_fqs,
+			    buf_layout, dev);
+
+	priv->percpu_priv = devm_alloc_percpu(dev, *priv->percpu_priv);
+
+	if (!priv->percpu_priv) {
+		dev_err(dev, "devm_alloc_percpu() failed\n");
+		err = -ENOMEM;
+		goto alloc_percpu_failed;
+	}
+	for_each_possible_cpu(i) {
+		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+		memset(percpu_priv, 0, sizeof(*percpu_priv));
+	}
+
+	/* Initialize NAPI */
+	err = dpa_private_napi_add(net_dev);
+
+	if (err < 0)
+		goto napi_add_failed;
+
+	err = dpa_private_netdev_init(net_dev);
+
+	if (err < 0)
+		goto netdev_init_failed;
+
+	pr_info("Probed interface %s\n", net_dev->name);
+
+	return 0;
+
+netdev_init_failed:
+napi_add_failed:
+	dpa_private_napi_del(net_dev);
+alloc_percpu_failed:
+	dpa_fq_free(dev, &priv->dpa_fq_list);
+fq_alloc_failed:
+	qman_delete_cgr_safe(&priv->ingress_cgr);
+	qman_release_cgrid(priv->ingress_cgr.cgrid);
+rx_cgr_init_failed:
+	qman_delete_cgr_safe(&priv->cgr_data.cgr);
+	qman_release_cgrid(priv->cgr_data.cgr.cgrid);
+tx_cgr_init_failed:
+add_channel_failed:
+get_channel_failed:
+	dpa_bp_free(priv);
+bp_create_failed:
+fq_probe_failed:
+alloc_failed:
+mac_probe_failed:
+	dev_set_drvdata(dev, NULL);
+	free_netdev(net_dev);
+alloc_etherdev_mq_failed:
+	if (atomic_read(&dpa_bp->refs) == 0)
+		devm_kfree(dev, dpa_bp);
+
+	return err;
+}
+
+static struct platform_device_id dpa_devtype[] = {
+	{
+		.name = "dpaa-ethernet",
+		.driver_data = 0,
+	}, {
+	}
+};
+MODULE_DEVICE_TABLE(platform, dpa_devtype);
+
+static struct platform_driver dpa_driver = {
+	.driver = {
+		.name = KBUILD_MODNAME,
+	},
+	.id_table = dpa_devtype,
+	.probe = dpaa_eth_priv_probe,
+	.remove = dpa_remove
+};
+
+static int __init dpa_load(void)
+{
+	int err;
+
+	pr_info(DPA_DESCRIPTION "\n");
+
+	/* initialise dpaa_eth mirror values */
+	dpa_rx_extra_headroom = fman_get_rx_extra_headroom();
+	dpa_max_frm = fman_get_max_frm();
+
+	err = platform_driver_register(&dpa_driver);
+	if (err < 0)
+		pr_err("Error, platform_driver_register() = %d\n", err);
+
+	return err;
+}
+module_init(dpa_load);
+
+static void __exit dpa_unload(void)
+{
+	platform_driver_unregister(&dpa_driver);
+
+	/* Only one channel is used and needs to be relased after all
+	 * interfaces are removed
+	 */
+	dpa_release_channel();
+}
+module_exit(dpa_unload);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Andy Fleming <afleming@freescale.com>");
+MODULE_DESCRIPTION(DPA_DESCRIPTION);
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
new file mode 100644
index 0000000..1cc8682
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
@@ -0,0 +1,432 @@
+/* Copyright 2008 - 2015 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *	 notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *	 notice, this list of conditions and the following disclaimer in the
+ *	 documentation and/or other materials provided with the distribution.
+ *     * Neither the name of Freescale Semiconductor nor the
+ *	 names of its contributors may be used to endorse or promote products
+ *	 derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __DPA_H
+#define __DPA_H
+
+#include <linux/netdevice.h>
+#include <soc/fsl/qman.h>
+
+#include "fman.h"
+#include "mac.h"
+
+extern int dpa_rx_extra_headroom;
+extern int dpa_max_frm;
+
+#define dpa_get_rx_extra_headroom() dpa_rx_extra_headroom
+#define dpa_get_max_frm() dpa_max_frm
+
+#define dpa_get_max_mtu()	\
+	(dpa_get_max_frm() - (VLAN_ETH_HLEN + ETH_FCS_LEN))
+
+/* Simple enum of FQ types - used for array indexing */
+enum port_type {RX, TX};
+
+struct dpa_buffer_layout_s {
+	u16 priv_data_size;
+	bool parse_results;
+	bool time_stamp;
+	bool hash_results;
+	u16 data_align;
+};
+
+#define DPA_ERR_ON(cond)
+
+#define DPA_TX_PRIV_DATA_SIZE	16
+#define DPA_PARSE_RESULTS_SIZE sizeof(struct fman_prs_result)
+#define DPA_TIME_STAMP_SIZE 8
+#define DPA_HASH_RESULTS_SIZE 8
+#define DPA_RX_PRIV_DATA_SIZE	(DPA_TX_PRIV_DATA_SIZE + \
+					dpa_get_rx_extra_headroom())
+
+#define FM_FD_STAT_RX_ERRORS						\
+	(FM_FD_ERR_DMA | FM_FD_ERR_PHYSICAL	| \
+	 FM_FD_ERR_SIZE | FM_FD_ERR_CLS_DISCARD | \
+	 FM_FD_ERR_EXTRACTION | FM_FD_ERR_NO_SCHEME	| \
+	 FM_FD_ERR_PRS_TIMEOUT | FM_FD_ERR_PRS_ILL_INSTRUCT | \
+	 FM_FD_ERR_PRS_HDR_ERR)
+
+#define FM_FD_STAT_TX_ERRORS \
+	(FM_FD_ERR_UNSUPPORTED_FORMAT | \
+	 FM_FD_ERR_LENGTH | FM_FD_ERR_DMA)
+
+/* The raw buffer size must be cacheline aligned.
+ * Normally we use 2K buffers.
+ */
+#define DPA_BP_RAW_SIZE		2048
+
+/* This is what FMan is ever allowed to use.
+ * FMan-DMA requires 16-byte alignment for Rx buffers, but SKB_DATA_ALIGN is
+ * even stronger (SMP_CACHE_BYTES-aligned), so we just get away with that,
+ * via SKB_WITH_OVERHEAD(). We can't rely on netdev_alloc_frag() giving us
+ * half-page-aligned buffers (can we?), so we reserve some more space
+ * for start-of-buffer alignment.
+ */
+#define dpa_bp_size(buffer_layout)	(SKB_WITH_OVERHEAD(DPA_BP_RAW_SIZE) - \
+						SMP_CACHE_BYTES)
+/* We must ensure that skb_shinfo is always cacheline-aligned. */
+#define DPA_SKB_SIZE(size)	((size) & ~(SMP_CACHE_BYTES - 1))
+
+/* Largest value that the FQD's OAL field can hold.
+ * This is DPAA-1.x specific.
+ */
+#define FSL_QMAN_MAX_OAL	127
+
+/* Default alignment for start of data in an Rx FD */
+#define DPA_FD_DATA_ALIGNMENT  16
+
+/* Values for the L3R field of the FM Parse Results
+ */
+/* L3 Type field: First IP Present IPv4 */
+#define FM_L3_PARSE_RESULT_IPV4	0x8000
+/* L3 Type field: First IP Present IPv6 */
+#define FM_L3_PARSE_RESULT_IPV6	0x4000
+
+/* Values for the L4R field of the FM Parse Results
+ * See $8.8.4.7.20 - L4 HXS - L4 Results from DPAA-Rev2 Reference Manual.
+ */
+/* L4 Type field: UDP */
+#define FM_L4_PARSE_RESULT_UDP	0x40
+/* L4 Type field: TCP */
+#define FM_L4_PARSE_RESULT_TCP	0x20
+
+/* number of Tx queues to FMan */
+#define DPAA_ETH_TX_QUEUES	NR_CPUS
+
+#define DPAA_ETH_RX_QUEUES	128
+
+#define FSL_DPAA_ETH_MAX_BUF_COUNT	128
+#define FSL_DPAA_ETH_REFILL_THRESHOLD	80
+
+/* More detailed FQ types - used for fine-grained WQ assignments */
+enum dpa_fq_type {
+	FQ_TYPE_RX_DEFAULT = 1, /* Rx Default FQs */
+	FQ_TYPE_RX_ERROR,	/* Rx Error FQs */
+	FQ_TYPE_RX_PCD,		/* User-defined PCDs */
+	FQ_TYPE_TX,		/* "Real" Tx FQs */
+	FQ_TYPE_TX_CONFIRM,	/* Tx default Conf FQ (actually an Rx FQ) */
+	FQ_TYPE_TX_CONF_MQ,	/* Tx conf FQs (one for each Tx FQ) */
+	FQ_TYPE_TX_ERROR,	/* Tx Error FQs (these are actually Rx FQs) */
+};
+
+struct dpa_fq {
+	struct qman_fq fq_base;
+	struct list_head list;
+	struct net_device *net_dev;
+	bool init;
+	u32 fqid;
+	u32 flags;
+	u16 channel;
+	u8 wq;
+	enum dpa_fq_type fq_type;
+};
+
+struct dpa_fq_cbs_t {
+	struct qman_fq rx_defq;
+	struct qman_fq tx_defq;
+	struct qman_fq rx_errq;
+	struct qman_fq tx_errq;
+	struct qman_fq egress_ern;
+};
+
+struct fqid_cell {
+	u32 start;
+	u32 count;
+};
+
+struct dpa_bp {
+	struct bman_pool *pool;
+	u8 bpid;
+	struct device *dev;
+	/* the buffer pools used for the private ports are initialized
+	 * with config_count buffers for each CPU; at runtime the
+	 * number of buffers per CPU is constantly brought back to this
+	 * level
+	 */
+	int config_count;
+	size_t size;
+	bool seed_pool;
+	/* physical address of the contiguous memory used by the pool to store
+	 * the buffers
+	 */
+	dma_addr_t paddr;
+	/* virtual address of the contiguous memory used by the pool to store
+	 * the buffers
+	 */
+	void __iomem *vaddr;
+	/* current number of buffers in the bpool alloted to this CPU */
+	int __percpu *percpu_count;
+	atomic_t refs;
+	/* some bpools need to be seeded before use by this cb */
+	int (*seed_cb)(struct dpa_bp *);
+	/* some bpools need to be emptied before freeing; this cb is used
+	 * for freeing of individual buffers taken from the pool
+	 */
+	void (*free_buf_cb)(void *addr);
+};
+
+struct dpa_napi_portal {
+	struct napi_struct napi;
+	struct qman_portal *p;
+	bool down;
+};
+
+struct dpa_percpu_priv_s {
+	struct net_device *net_dev;
+	struct dpa_napi_portal *np;
+	struct rtnl_link_stats64 stats;
+};
+
+struct dpa_priv_s {
+	struct dpa_percpu_priv_s __percpu *percpu_priv;
+	struct dpa_bp *dpa_bp;
+	/* Store here the needed Tx headroom for convenience and speed
+	 * (even though it can be computed based on the fields of buf_layout)
+	 */
+	u16 tx_headroom;
+	struct net_device *net_dev;
+	struct mac_device *mac_dev;
+	struct qman_fq *egress_fqs[DPAA_ETH_TX_QUEUES];
+	struct qman_fq *conf_fqs[DPAA_ETH_TX_QUEUES];
+
+	size_t bp_count;
+
+	u16 channel;	/* "fsl,qman-channel-id" */
+	struct list_head dpa_fq_list;
+
+	u32 msg_enable;	/* net_device message level */
+
+	struct {
+		/* All egress queues to a given net device belong to one
+		 * (and the same) congestion group.
+		 */
+		struct qman_cgr cgr;
+	} cgr_data;
+	/* Use a per-port CGR for ingress traffic. */
+	bool use_ingress_cgr;
+	struct qman_cgr ingress_cgr;
+
+	struct dpa_buffer_layout_s *buf_layout;
+	u16 rx_headroom;
+};
+
+struct fm_port_fqs {
+	struct dpa_fq *tx_defq;
+	struct dpa_fq *tx_errq;
+	struct dpa_fq *rx_defq;
+	struct dpa_fq *rx_errq;
+};
+
+int dpa_bp_priv_seed(struct dpa_bp *dpa_bp);
+int dpaa_eth_refill_bpools(struct dpa_bp *dpa_bp, int *count_ptr);
+void _dpa_rx(struct net_device *net_dev,
+	     struct qman_portal *portal,
+	     const struct dpa_priv_s *priv,
+	     struct dpa_percpu_priv_s *percpu_priv,
+	     const struct qm_fd *fd,
+	     u32 fqid,
+	     int *count_ptr);
+int dpa_tx(struct sk_buff *skb, struct net_device *net_dev);
+struct sk_buff *_dpa_cleanup_tx_fd(const struct dpa_priv_s *priv,
+				   const struct qm_fd *fd);
+
+/* Turn on HW checksum computation for this outgoing frame.
+ * If the current protocol is not something we support in this regard
+ * (or if the stack has already computed the SW checksum), we do nothing.
+ *
+ * Returns 0 if all goes well (or HW csum doesn't apply), and a negative value
+ * otherwise.
+ *
+ * Note that this function may modify the fd->cmd field and the skb data buffer
+ * (the Parse Results area).
+ */
+int dpa_enable_tx_csum(struct dpa_priv_s *priv, struct sk_buff *skb,
+		       struct qm_fd *fd, char *parse_results);
+
+static inline int dpaa_eth_napi_schedule(struct dpa_percpu_priv_s *percpu_priv,
+					 struct qman_portal *portal)
+{
+	/* In case of threaded ISR for RT enable kernel,
+	 * in_irq() does not return appropriate value, so use
+	 * in_serving_softirq to distinguish softirq or irq context.
+	 */
+	if (unlikely(in_irq() || !in_serving_softirq())) {
+		/* Disable QMan IRQ and invoke NAPI */
+		int ret = qman_p_irqsource_remove(portal, QM_PIRQ_DQRI);
+
+		if (likely(!ret)) {
+			const struct qman_portal_config *pc =
+					qman_p_get_portal_config(portal);
+			struct dpa_napi_portal *np =
+					&percpu_priv->np[pc->channel];
+
+			np->p = portal;
+			napi_schedule(&np->napi);
+			return 1;
+		}
+	}
+	return 0;
+}
+
+static inline ssize_t __const dpa_fd_length(const struct qm_fd *fd)
+{
+	return fd->length20;
+}
+
+static inline ssize_t __const dpa_fd_offset(const struct qm_fd *fd)
+{
+	return fd->offset;
+}
+
+/* Verifies if the skb length is below the interface MTU */
+static inline int dpa_check_rx_mtu(struct sk_buff *skb, int mtu)
+{
+	if (unlikely(skb->len > mtu))
+		if ((skb->protocol != htons(ETH_P_8021Q)) ||
+		    (skb->len > mtu + 4))
+			return -1;
+
+	return 0;
+}
+
+static inline u16 dpa_get_headroom(struct dpa_buffer_layout_s *bl)
+{
+	u16 headroom;
+	/* The frame headroom must accommodate:
+	 * - the driver private data area
+	 * - parse results, hash results, timestamp if selected
+	 * If either hash results or time stamp are selected, both will
+	 * be copied to/from the frame headroom, as TS is located between PR and
+	 * HR in the IC and IC copy size has a granularity of 16bytes
+	 * (see description of FMBM_RICP and FMBM_TICP registers in DPAARM)
+	 *
+	 * Also make sure the headroom is a multiple of data_align bytes
+	 */
+	headroom = (u16)(bl->priv_data_size +
+		   (bl->parse_results ? DPA_PARSE_RESULTS_SIZE : 0) +
+		   (bl->hash_results || bl->time_stamp ?
+		    DPA_TIME_STAMP_SIZE + DPA_HASH_RESULTS_SIZE : 0));
+
+	return bl->data_align ? ALIGN(headroom, bl->data_align) : headroom;
+}
+
+void dpa_private_napi_del(struct net_device *net_dev);
+
+static inline void clear_fd(struct qm_fd *fd)
+{
+	fd->opaque_addr = 0;
+	fd->opaque = 0;
+	fd->cmd = 0;
+}
+
+static inline int _dpa_tx_fq_to_id(const struct dpa_priv_s *priv,
+				   struct qman_fq *tx_fq)
+{
+	int i;
+
+	for (i = 0; i < DPAA_ETH_TX_QUEUES; i++)
+		if (priv->egress_fqs[i] == tx_fq)
+			return i;
+
+	return -EINVAL;
+}
+
+static inline int dpa_xmit(struct dpa_priv_s *priv,
+			   struct rtnl_link_stats64 *percpu_stats,
+			   int queue,
+			   struct qm_fd *fd)
+{
+	int err, i;
+	struct qman_fq *egress_fq;
+
+	egress_fq = priv->egress_fqs[queue];
+	if (fd->bpid == 0xff)
+		fd->cmd |= qman_fq_fqid(priv->conf_fqs[queue]);
+
+	for (i = 0; i < 100000; i++) {
+		err = qman_enqueue(egress_fq, fd, 0);
+		if (err != -EBUSY)
+			break;
+	}
+
+	if (unlikely(err < 0)) {
+		percpu_stats->tx_errors++;
+		percpu_stats->tx_fifo_errors++;
+		return err;
+	}
+
+	percpu_stats->tx_packets++;
+	percpu_stats->tx_bytes += dpa_fd_length(fd);
+
+	return 0;
+}
+
+/* Use multiple WQs for FQ assignment:
+ *	- Tx Confirmation queues go to WQ1.
+ *	- Rx Default and Tx queues go to WQ3 (no differentiation between
+ *	  Rx and Tx traffic).
+ *	- Rx Error and Tx Error queues go to WQ2 (giving them a better chance
+ *	  to be scheduled, in case there are many more FQs in WQ3).
+ * This ensures that Tx-confirmed buffers are timely released. In particular,
+ * it avoids congestion on the Tx Confirm FQs, which can pile up PFDRs if they
+ * are greatly outnumbered by other FQs in the system, while
+ * dequeue scheduling is round-robin.
+ */
+static inline void _dpa_assign_wq(struct dpa_fq *fq)
+{
+	switch (fq->fq_type) {
+	case FQ_TYPE_TX_CONFIRM:
+	case FQ_TYPE_TX_CONF_MQ:
+		fq->wq = 1;
+		break;
+	case FQ_TYPE_RX_DEFAULT:
+	case FQ_TYPE_TX:
+		fq->wq = 3;
+		break;
+	case FQ_TYPE_RX_ERROR:
+	case FQ_TYPE_TX_ERROR:
+		fq->wq = 2;
+		break;
+	default:
+		WARN(1, "Invalid FQ type %d for FQID %d!\n",
+		     fq->fq_type, fq->fqid);
+	}
+}
+
+/* Use the queue selected by XPS */
+#define dpa_get_queue_mapping(skb) \
+	skb_get_queue_mapping(skb)
+
+static inline void _dpa_bp_free_pf(void *addr)
+{
+	put_page(virt_to_head_page(addr));
+}
+
+#endif	/* __DPA_H */
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c
new file mode 100644
index 0000000..963be4d8
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c
@@ -0,0 +1,1299 @@
+/* Copyright 2008 - 2015 Freescale Semiconductor, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *	 notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *	 notice, this list of conditions and the following disclaimer in the
+ *	 documentation and/or other materials provided with the distribution.
+ *     * Neither the name of Freescale Semiconductor nor the
+ *	 names of its contributors may be used to endorse or promote products
+ *	 derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/of_net.h>
+#include <linux/etherdevice.h>
+#include <linux/kthread.h>
+#include <linux/percpu.h>
+#include <linux/highmem.h>
+#include <linux/sort.h>
+#include <soc/fsl/qman.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/if_vlan.h>
+#include "dpaa_eth.h"
+#include "dpaa_eth_common.h"
+#include "mac.h"
+
+/* Size in bytes of the FQ taildrop threshold */
+#define DPA_FQ_TD 0x200000
+
+#define DPAA_CS_THRESHOLD_1G 0x06000000
+/* Egress congestion threshold on 1G ports, range 0x1000 .. 0x10000000
+ * The size in bytes of the egress Congestion State notification threshold on
+ * 1G ports. The 1G dTSECs can quite easily be flooded by cores doing Tx in a
+ * tight loop (e.g. by sending UDP datagrams at "while(1) speed"),
+ * and the larger the frame size, the more acute the problem.
+ * So we have to find a balance between these factors:
+ * - avoiding the device staying congested for a prolonged time (risking
+ *   the netdev watchdog to fire - see also the tx_timeout module param);
+ * - affecting performance of protocols such as TCP, which otherwise
+ *   behave well under the congestion notification mechanism;
+ * - preventing the Tx cores from tightly-looping (as if the congestion
+ *   threshold was too low to be effective);
+ * - running out of memory if the CS threshold is set too high.
+ */
+
+#define DPAA_CS_THRESHOLD_10G 0x10000000
+/* The size in bytes of the egress Congestion State notification threshold on
+ * 10G ports, range 0x1000 .. 0x10000000
+ */
+
+static struct dpa_bp *dpa_bp_array[64];
+
+int dpa_max_frm;
+
+int dpa_rx_extra_headroom;
+
+static const struct fqid_cell tx_confirm_fqids[] = {
+	{0, DPAA_ETH_TX_QUEUES}
+};
+
+static const struct fqid_cell default_fqids[][3] = {
+	[RX] = { {0, 1}, {0, 1}, {0, DPAA_ETH_RX_QUEUES} },
+	[TX] = { {0, 1}, {0, 1}, {0, DPAA_ETH_TX_QUEUES} }
+};
+
+int dpa_netdev_init(struct net_device *net_dev,
+		    const u8 *mac_addr,
+		    u16 tx_timeout)
+{
+	int err;
+	struct dpa_priv_s *priv = netdev_priv(net_dev);
+	struct device *dev = net_dev->dev.parent;
+
+	net_dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
+	/* we do not want shared skbs on TX */
+	net_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+
+	net_dev->features |= net_dev->hw_features;
+	net_dev->vlan_features = net_dev->features;
+
+	memcpy(net_dev->perm_addr, mac_addr, net_dev->addr_len);
+	memcpy(net_dev->dev_addr, mac_addr, net_dev->addr_len);
+
+	net_dev->needed_headroom = priv->tx_headroom;
+	net_dev->watchdog_timeo = msecs_to_jiffies(tx_timeout);
+
+	/* start without the RUNNING flag, phylib controls it later */
+	netif_carrier_off(net_dev);
+
+	err = register_netdev(net_dev);
+	if (err < 0) {
+		dev_err(dev, "register_netdev() = %d\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+int dpa_start(struct net_device *net_dev)
+{
+	int err, i;
+	struct dpa_priv_s *priv;
+	struct mac_device *mac_dev;
+
+	priv = netdev_priv(net_dev);
+	mac_dev = priv->mac_dev;
+
+	err = mac_dev->init_phy(net_dev, priv->mac_dev);
+	if (err < 0) {
+		netif_err(priv, ifup, net_dev, "init_phy() = %d\n", err);
+		return err;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(mac_dev->port); i++) {
+		err = fman_port_enable(mac_dev->port[i]);
+		if (err)
+			goto mac_start_failed;
+	}
+
+	err = priv->mac_dev->start(mac_dev);
+	if (err < 0) {
+		netif_err(priv, ifup, net_dev, "mac_dev->start() = %d\n", err);
+		goto mac_start_failed;
+	}
+
+	netif_tx_start_all_queues(net_dev);
+
+	return 0;
+
+mac_start_failed:
+	for (i = 0; i < ARRAY_SIZE(mac_dev->port); i++)
+		fman_port_disable(mac_dev->port[i]);
+
+	return err;
+}
+
+int dpa_stop(struct net_device *net_dev)
+{
+	int i, err, error;
+	struct dpa_priv_s *priv;
+	struct mac_device *mac_dev;
+
+	priv = netdev_priv(net_dev);
+	mac_dev = priv->mac_dev;
+
+	netif_tx_stop_all_queues(net_dev);
+	/* Allow the Fman (Tx) port to process in-flight frames before we
+	 * try switching it off.
+	 */
+	usleep_range(5000, 10000);
+
+	err = mac_dev->stop(mac_dev);
+	if (err < 0)
+		netif_err(priv, ifdown, net_dev, "mac_dev->stop() = %d\n",
+			  err);
+
+	for (i = 0; i < ARRAY_SIZE(mac_dev->port); i++) {
+		error = fman_port_disable(mac_dev->port[i]);
+		if (error)
+			err = error;
+	}
+
+	if (mac_dev->phy_dev)
+		phy_disconnect(mac_dev->phy_dev);
+	mac_dev->phy_dev = NULL;
+
+	return err;
+}
+
+void dpa_timeout(struct net_device *net_dev)
+{
+	const struct dpa_priv_s	*priv;
+	struct dpa_percpu_priv_s *percpu_priv;
+
+	priv = netdev_priv(net_dev);
+	percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+
+	netif_crit(priv, timer, net_dev, "Transmit timeout latency: %u ms\n",
+		   jiffies_to_msecs(jiffies - net_dev->trans_start));
+
+	percpu_priv->stats.tx_errors++;
+}
+
+/* Calculates the statistics for the given device by adding the statistics
+ * collected by each CPU.
+ */
+struct rtnl_link_stats64 *dpa_get_stats64(struct net_device *net_dev,
+					  struct rtnl_link_stats64 *stats)
+{
+	struct dpa_priv_s *priv = netdev_priv(net_dev);
+	u64 *cpustats;
+	u64 *netstats = (u64 *)stats;
+	int i, j;
+	struct dpa_percpu_priv_s *percpu_priv;
+	int numstats = sizeof(struct rtnl_link_stats64) / sizeof(u64);
+
+	for_each_possible_cpu(i) {
+		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+
+		cpustats = (u64 *)&percpu_priv->stats;
+
+		for (j = 0; j < numstats; j++)
+			netstats[j] += cpustats[j];
+	}
+
+	return stats;
+}
+
+int dpa_change_mtu(struct net_device *net_dev, int new_mtu)
+{
+	const int max_mtu = dpa_get_max_mtu();
+
+	/* Make sure we don't exceed the Ethernet controller's MAXFRM */
+	if (new_mtu < 68 || new_mtu > max_mtu) {
+		netdev_err(net_dev, "Invalid L3 mtu %d (must be between %d and %d).\n",
+			   new_mtu, 68, max_mtu);
+		return -EINVAL;
+	}
+	net_dev->mtu = new_mtu;
+
+	return 0;
+}
+
+/* .ndo_init callback */
+int dpa_ndo_init(struct net_device *net_dev)
+{
+	/* If fsl_fm_max_frm is set to a higher value than the all-common 1500,
+	 * we choose conservatively and let the user explicitly set a higher
+	 * MTU via ifconfig. Otherwise, the user may end up with different MTUs
+	 * in the same LAN.
+	 * If on the other hand fsl_fm_max_frm has been chosen below 1500,
+	 * start with the maximum allowed.
+	 */
+	int init_mtu = min(dpa_get_max_mtu(), ETH_DATA_LEN);
+
+	netdev_dbg(net_dev, "Setting initial MTU on net device: %d\n",
+		   init_mtu);
+	net_dev->mtu = init_mtu;
+
+	return 0;
+}
+
+int dpa_set_features(struct net_device *dev, netdev_features_t features)
+{
+	/* Not much to do here for now */
+	dev->features = features;
+	return 0;
+}
+
+netdev_features_t dpa_fix_features(struct net_device *dev,
+				   netdev_features_t features)
+{
+	netdev_features_t unsupported_features = 0;
+
+	/* In theory we should never be requested to enable features that
+	 * we didn't set in netdev->features and netdev->hw_features at probe
+	 * time, but double check just to be on the safe side.
+	 * We don't support enabling Rx csum through ethtool yet
+	 */
+	unsupported_features |= NETIF_F_RXCSUM;
+
+	features &= ~unsupported_features;
+
+	return features;
+}
+
+int dpa_remove(struct platform_device *pdev)
+{
+	int err;
+	struct device *dev;
+	struct net_device *net_dev;
+	struct dpa_priv_s *priv;
+
+	dev = &pdev->dev;
+	net_dev = dev_get_drvdata(dev);
+
+	priv = netdev_priv(net_dev);
+
+	dev_set_drvdata(dev, NULL);
+	unregister_netdev(net_dev);
+
+	err = dpa_fq_free(dev, &priv->dpa_fq_list);
+
+	qman_delete_cgr_safe(&priv->ingress_cgr);
+	qman_release_cgrid(priv->ingress_cgr.cgrid);
+	qman_delete_cgr_safe(&priv->cgr_data.cgr);
+	qman_release_cgrid(priv->cgr_data.cgr.cgrid);
+
+	dpa_private_napi_del(net_dev);
+
+	dpa_bp_free(priv);
+
+	if (priv->buf_layout)
+		devm_kfree(dev, priv->buf_layout);
+
+	free_netdev(net_dev);
+
+	return err;
+}
+
+struct mac_device *dpa_mac_dev_get(struct platform_device *pdev)
+{
+	struct device *dpa_dev, *dev;
+	struct device_node *mac_node;
+	struct platform_device *of_dev;
+	struct mac_device *mac_dev;
+	struct dpaa_eth_data *eth_data;
+
+	dpa_dev = &pdev->dev;
+	eth_data = dpa_dev->platform_data;
+	if (!eth_data)
+		return ERR_PTR(-ENODEV);
+
+	mac_node = eth_data->mac_node;
+
+	of_dev = of_find_device_by_node(mac_node);
+	if (!of_dev) {
+		dev_err(dpa_dev, "of_find_device_by_node(%s) failed\n",
+			mac_node->full_name);
+		of_node_put(mac_node);
+		return ERR_PTR(-EINVAL);
+	}
+	of_node_put(mac_node);
+
+	dev = &of_dev->dev;
+
+	mac_dev = dev_get_drvdata(dev);
+	if (!mac_dev) {
+		dev_err(dpa_dev, "dev_get_drvdata(%s) failed\n",
+			dev_name(dev));
+		return ERR_PTR(-EINVAL);
+	}
+
+	return mac_dev;
+}
+
+int dpa_mac_hw_index_get(struct platform_device *pdev)
+{
+	struct device *dpa_dev;
+	struct dpaa_eth_data *eth_data;
+
+	dpa_dev = &pdev->dev;
+	eth_data = dpa_dev->platform_data;
+
+	return eth_data->mac_hw_id;
+}
+
+int dpa_mac_fman_index_get(struct platform_device *pdev)
+{
+	struct device *dpa_dev;
+	struct dpaa_eth_data *eth_data;
+
+	dpa_dev = &pdev->dev;
+	eth_data = dpa_dev->platform_data;
+
+	return eth_data->fman_hw_id;
+}
+
+int dpa_set_mac_address(struct net_device *net_dev, void *addr)
+{
+	const struct dpa_priv_s	*priv;
+	int err;
+	struct mac_device *mac_dev;
+
+	priv = netdev_priv(net_dev);
+
+	err = eth_mac_addr(net_dev, addr);
+	if (err < 0) {
+		netif_err(priv, drv, net_dev, "eth_mac_addr() = %d\n", err);
+		return err;
+	}
+
+	mac_dev = priv->mac_dev;
+
+	err = mac_dev->change_addr(mac_dev->fman_mac,
+				   (enet_addr_t *)net_dev->dev_addr);
+	if (err < 0) {
+		netif_err(priv, drv, net_dev, "mac_dev->change_addr() = %d\n",
+			  err);
+		return err;
+	}
+
+	return 0;
+}
+
+void dpa_set_rx_mode(struct net_device *net_dev)
+{
+	int err;
+	const struct dpa_priv_s	*priv;
+
+	priv = netdev_priv(net_dev);
+
+	if (!!(net_dev->flags & IFF_PROMISC) != priv->mac_dev->promisc) {
+		priv->mac_dev->promisc = !priv->mac_dev->promisc;
+		err = priv->mac_dev->set_promisc(priv->mac_dev->fman_mac,
+						 priv->mac_dev->promisc);
+		if (err < 0)
+			netif_err(priv, drv, net_dev,
+				  "mac_dev->set_promisc() = %d\n",
+				  err);
+	}
+
+	err = priv->mac_dev->set_multi(net_dev, priv->mac_dev);
+	if (err < 0)
+		netif_err(priv, drv, net_dev, "mac_dev->set_multi() = %d\n",
+			  err);
+}
+
+void dpa_set_buffers_layout(struct mac_device *mac_dev,
+			    struct dpa_buffer_layout_s *layout)
+{
+	/* Rx */
+	layout[RX].priv_data_size = (u16)DPA_RX_PRIV_DATA_SIZE;
+	layout[RX].parse_results = true;
+	layout[RX].hash_results = true;
+	layout[RX].data_align = DPA_FD_DATA_ALIGNMENT;
+
+	/* Tx */
+	layout[TX].priv_data_size = DPA_TX_PRIV_DATA_SIZE;
+	layout[TX].parse_results = true;
+	layout[TX].hash_results = true;
+	layout[TX].data_align = DPA_FD_DATA_ALIGNMENT;
+}
+
+int dpa_bp_alloc(struct dpa_bp *dpa_bp)
+{
+	int err;
+	struct bman_pool_params bp_params;
+	struct platform_device *pdev;
+
+	if (dpa_bp->size == 0 || dpa_bp->config_count == 0) {
+		pr_err("Buffer pool is not properly initialized! Missing size or initial number of buffers");
+		return -EINVAL;
+	}
+
+	memset(&bp_params, 0, sizeof(struct bman_pool_params));
+
+	/* If the pool is already specified, we only create one per bpid */
+	if (dpa_bpid2pool_use(dpa_bp->bpid))
+		return 0;
+
+	if (dpa_bp->bpid == 0)
+		bp_params.flags |= BMAN_POOL_FLAG_DYNAMIC_BPID;
+	else
+		bp_params.bpid = dpa_bp->bpid;
+
+	dpa_bp->pool = bman_new_pool(&bp_params);
+	if (!dpa_bp->pool) {
+		pr_err("bman_new_pool() failed\n");
+		return -ENODEV;
+	}
+
+	dpa_bp->bpid = (u8)bman_get_params(dpa_bp->pool)->bpid;
+
+	pdev = platform_device_register_simple("DPAA_bpool",
+					       dpa_bp->bpid, NULL, 0);
+	if (IS_ERR(pdev)) {
+		err = PTR_ERR(pdev);
+		goto pdev_register_failed;
+	}
+
+	err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(40));
+	if (err)
+		goto pdev_mask_failed;
+
+	dpa_bp->dev = &pdev->dev;
+
+	if (dpa_bp->seed_cb) {
+		err = dpa_bp->seed_cb(dpa_bp);
+		if (err)
+			goto pool_seed_failed;
+	}
+
+	dpa_bpid2pool_map(dpa_bp->bpid, dpa_bp);
+
+	return 0;
+
+pool_seed_failed:
+pdev_mask_failed:
+	platform_device_unregister(pdev);
+pdev_register_failed:
+	bman_free_pool(dpa_bp->pool);
+
+	return err;
+}
+
+void dpa_bp_drain(struct dpa_bp *bp)
+{
+	int ret;
+	u8 num = 8;
+
+	do {
+		struct bm_buffer bmb[8];
+		int i;
+
+		ret = bman_acquire(bp->pool, bmb, num, 0);
+		if (ret < 0) {
+			if (num == 8) {
+				/* we have less than 8 buffers left;
+				 * drain them one by one
+				 */
+				num = 1;
+				ret = 1;
+				continue;
+			} else {
+				/* Pool is fully drained */
+				break;
+			}
+		}
+
+		for (i = 0; i < num; i++) {
+			dma_addr_t addr = bm_buf_addr(&bmb[i]);
+
+			dma_unmap_single(bp->dev, addr, bp->size,
+					 DMA_BIDIRECTIONAL);
+
+			bp->free_buf_cb(phys_to_virt(addr));
+		}
+	} while (ret > 0);
+}
+
+static void _dpa_bp_free(struct dpa_bp *dpa_bp)
+{
+	struct dpa_bp *bp = dpa_bpid2pool(dpa_bp->bpid);
+
+	/* the mapping between bpid and dpa_bp is done very late in the
+	 * allocation procedure; if something failed before the mapping, the bp
+	 * was not configured, therefore we don't need the below instructions
+	 */
+	if (!bp)
+		return;
+
+	if (!atomic_dec_and_test(&bp->refs))
+		return;
+
+	if (bp->free_buf_cb)
+		dpa_bp_drain(bp);
+
+	dpa_bp_array[bp->bpid] = NULL;
+	bman_free_pool(bp->pool);
+
+	if (bp->dev)
+		platform_device_unregister(to_platform_device(bp->dev));
+}
+
+void dpa_bp_free(struct dpa_priv_s *priv)
+{
+	int i;
+
+	for (i = 0; i < priv->bp_count; i++)
+		_dpa_bp_free(&priv->dpa_bp[i]);
+}
+
+struct dpa_bp *dpa_bpid2pool(int bpid)
+{
+	return dpa_bp_array[bpid];
+}
+
+void dpa_bpid2pool_map(int bpid, struct dpa_bp *dpa_bp)
+{
+	dpa_bp_array[bpid] = dpa_bp;
+	atomic_set(&dpa_bp->refs, 1);
+}
+
+bool dpa_bpid2pool_use(int bpid)
+{
+	if (dpa_bpid2pool(bpid)) {
+		atomic_inc(&dpa_bp_array[bpid]->refs);
+		return true;
+	}
+
+	return false;
+}
+
+struct dpa_fq *dpa_fq_alloc(struct device *dev,
+			    const struct fqid_cell *fqids,
+			    struct list_head *list,
+			    enum dpa_fq_type fq_type)
+{
+	int i;
+	struct dpa_fq *dpa_fq;
+
+	dpa_fq = devm_kzalloc(dev, sizeof(*dpa_fq) * fqids->count, GFP_KERNEL);
+	if (!dpa_fq)
+		return NULL;
+
+	for (i = 0; i < fqids->count; i++) {
+		dpa_fq[i].fq_type = fq_type;
+		dpa_fq[i].fqid = fqids->start ? fqids->start + i : 0;
+		list_add_tail(&dpa_fq[i].list, list);
+	}
+
+	for (i = 0; i < fqids->count; i++)
+		_dpa_assign_wq(dpa_fq + i);
+
+	return dpa_fq;
+}
+
+int dpa_fq_probe_mac(struct device *dev, struct list_head *list,
+		     struct fm_port_fqs *port_fqs,
+		     bool alloc_tx_conf_fqs,
+		     enum port_type ptype)
+{
+	const struct fqid_cell *fqids;
+	struct dpa_fq *dpa_fq;
+	int num_ranges;
+	int i;
+
+	if (ptype == TX && alloc_tx_conf_fqs) {
+		if (!dpa_fq_alloc(dev, tx_confirm_fqids, list,
+				  FQ_TYPE_TX_CONF_MQ))
+			goto fq_alloc_failed;
+	}
+
+	fqids = default_fqids[ptype];
+	num_ranges = 3;
+
+	for (i = 0; i < num_ranges; i++) {
+		switch (i) {
+		case 0:
+			/* The first queue is the error queue */
+			if (fqids[i].count != 1)
+				goto invalid_error_queue;
+
+			dpa_fq = dpa_fq_alloc(dev, &fqids[i], list,
+					      ptype == RX ?
+						FQ_TYPE_RX_ERROR :
+						FQ_TYPE_TX_ERROR);
+			if (!dpa_fq)
+				goto fq_alloc_failed;
+
+			if (ptype == RX)
+				port_fqs->rx_errq = &dpa_fq[0];
+			else
+				port_fqs->tx_errq = &dpa_fq[0];
+			break;
+		case 1:
+			/* the second queue is the default queue */
+			if (fqids[i].count != 1)
+				goto invalid_default_queue;
+
+			dpa_fq = dpa_fq_alloc(dev, &fqids[i], list,
+					      ptype == RX ?
+						FQ_TYPE_RX_DEFAULT :
+						FQ_TYPE_TX_CONFIRM);
+			if (!dpa_fq)
+				goto fq_alloc_failed;
+
+			if (ptype == RX)
+				port_fqs->rx_defq = &dpa_fq[0];
+			else
+				port_fqs->tx_defq = &dpa_fq[0];
+			break;
+		default:
+			/* all subsequent queues are Tx */
+			if (!dpa_fq_alloc(dev, &fqids[i], list, FQ_TYPE_TX))
+				goto fq_alloc_failed;
+			break;
+		}
+	}
+
+	return 0;
+
+fq_alloc_failed:
+	dev_err(dev, "dpa_fq_alloc() failed\n");
+	return -ENOMEM;
+
+invalid_default_queue:
+invalid_error_queue:
+	dev_err(dev, "Too many default or error queues\n");
+	return -EINVAL;
+}
+
+static u32 rx_pool_channel;
+static DEFINE_SPINLOCK(rx_pool_channel_init);
+
+int dpa_get_channel(void)
+{
+	spin_lock(&rx_pool_channel_init);
+	if (!rx_pool_channel) {
+		u32 pool;
+		int ret = qman_alloc_pool(&pool);
+
+		if (!ret)
+			rx_pool_channel = pool;
+	}
+	spin_unlock(&rx_pool_channel_init);
+	if (!rx_pool_channel)
+		return -ENOMEM;
+	return rx_pool_channel;
+}
+
+void dpa_release_channel(void)
+{
+	qman_release_pool(rx_pool_channel);
+}
+
+int dpaa_eth_add_channel(void *__arg)
+{
+	const cpumask_t *cpus = qman_affine_cpus();
+	u32 pool = QM_SDQCR_CHANNELS_POOL_CONV((u16)(unsigned long)__arg);
+	int cpu;
+	struct qman_portal *portal;
+
+	for_each_cpu(cpu, cpus) {
+		portal = (struct qman_portal *)qman_get_affine_portal(cpu);
+		qman_p_static_dequeue_add(portal, pool);
+	}
+	return 0;
+}
+
+/* Congestion group state change notification callback.
+ * Stops the device's egress queues while they are congested and
+ * wakes them upon exiting congested state.
+ * Also updates some CGR-related stats.
+ */
+static void dpaa_eth_cgscn(struct qman_portal *qm, struct qman_cgr *cgr,
+			   int congested)
+{
+	struct dpa_priv_s *priv = (struct dpa_priv_s *)container_of(cgr,
+		struct dpa_priv_s, cgr_data.cgr);
+
+	if (congested)
+		netif_tx_stop_all_queues(priv->net_dev);
+	else
+		netif_tx_wake_all_queues(priv->net_dev);
+}
+
+int dpaa_eth_cgr_init(struct dpa_priv_s *priv)
+{
+	struct qm_mcc_initcgr initcgr;
+	u32 cs_th;
+	int err;
+
+	err = qman_alloc_cgrid(&priv->cgr_data.cgr.cgrid);
+	if (err < 0) {
+		pr_err("Error %d allocating CGR ID\n", err);
+		goto out_error;
+	}
+	priv->cgr_data.cgr.cb = dpaa_eth_cgscn;
+
+	/* Enable Congestion State Change Notifications and CS taildrop */
+	initcgr.we_mask = QM_CGR_WE_CSCN_EN | QM_CGR_WE_CS_THRES;
+	initcgr.cgr.cscn_en = QM_CGR_EN;
+
+	/* Set different thresholds based on the MAC speed.
+	 * This may turn suboptimal if the MAC is reconfigured at a speed
+	 * lower than its max, e.g. if a dTSEC later negotiates a 100Mbps link.
+	 * In such cases, we ought to reconfigure the threshold, too.
+	 */
+	if (priv->mac_dev->if_support & SUPPORTED_10000baseT_Full)
+		cs_th = DPAA_CS_THRESHOLD_10G;
+	else
+		cs_th = DPAA_CS_THRESHOLD_1G;
+	qm_cgr_cs_thres_set64(&initcgr.cgr.cs_thres, cs_th, 1);
+
+	initcgr.we_mask |= QM_CGR_WE_CSTD_EN;
+	initcgr.cgr.cstd_en = QM_CGR_EN;
+
+	err = qman_create_cgr(&priv->cgr_data.cgr, QMAN_CGR_FLAG_USE_INIT,
+			      &initcgr);
+	if (err < 0) {
+		pr_err("Error %d creating CGR with ID %d\n", err,
+		       priv->cgr_data.cgr.cgrid);
+		qman_release_cgrid(priv->cgr_data.cgr.cgrid);
+		goto out_error;
+	}
+	pr_debug("Created CGR %d for netdev with hwaddr %pM on QMan channel %d\n",
+		 priv->cgr_data.cgr.cgrid, priv->mac_dev->addr,
+		 priv->cgr_data.cgr.chan);
+
+out_error:
+	return err;
+}
+
+static inline void dpa_setup_ingress(const struct dpa_priv_s *priv,
+				     struct dpa_fq *fq,
+				     const struct qman_fq *template)
+{
+	fq->fq_base = *template;
+	fq->net_dev = priv->net_dev;
+
+	fq->flags = QMAN_FQ_FLAG_NO_ENQUEUE;
+	fq->channel = priv->channel;
+}
+
+static inline void dpa_setup_egress(const struct dpa_priv_s *priv,
+				    struct dpa_fq *fq,
+				    struct fman_port *port,
+				    const struct qman_fq *template)
+{
+	fq->fq_base = *template;
+	fq->net_dev = priv->net_dev;
+
+	if (port) {
+		fq->flags = QMAN_FQ_FLAG_TO_DCPORTAL;
+		fq->channel = (u16)fman_port_get_qman_channel_id(port);
+	} else {
+		fq->flags = QMAN_FQ_FLAG_NO_MODIFY;
+	}
+}
+
+void dpa_fq_setup(struct dpa_priv_s *priv, const struct dpa_fq_cbs_t *fq_cbs,
+		  struct fman_port *tx_port)
+{
+	struct dpa_fq *fq;
+	u16 portals[NR_CPUS];
+	int cpu, num_portals = 0;
+	const cpumask_t *affine_cpus = qman_affine_cpus();
+	int egress_cnt = 0, conf_cnt = 0;
+
+	for_each_cpu(cpu, affine_cpus)
+		portals[num_portals++] = qman_affine_channel(cpu);
+	if (num_portals == 0)
+		dev_err(priv->net_dev->dev.parent,
+			"No Qman software (affine) channels found");
+
+	/* Initialize each FQ in the list */
+	list_for_each_entry(fq, &priv->dpa_fq_list, list) {
+		switch (fq->fq_type) {
+		case FQ_TYPE_RX_DEFAULT:
+			DPA_ERR_ON(!priv->mac_dev);
+			dpa_setup_ingress(priv, fq, &fq_cbs->rx_defq);
+			break;
+		case FQ_TYPE_RX_ERROR:
+			DPA_ERR_ON(!priv->mac_dev);
+			dpa_setup_ingress(priv, fq, &fq_cbs->rx_errq);
+			break;
+		case FQ_TYPE_TX:
+			dpa_setup_egress(priv, fq, tx_port,
+					 &fq_cbs->egress_ern);
+			/* If we have more Tx queues than the number of cores,
+			 * just ignore the extra ones.
+			 */
+			if (egress_cnt < DPAA_ETH_TX_QUEUES)
+				priv->egress_fqs[egress_cnt++] = &fq->fq_base;
+			break;
+		case FQ_TYPE_TX_CONFIRM:
+			DPA_ERR_ON(!priv->mac_dev);
+			dpa_setup_ingress(priv, fq, &fq_cbs->tx_defq);
+			break;
+		case FQ_TYPE_TX_CONF_MQ:
+			DPA_ERR_ON(!priv->mac_dev);
+			dpa_setup_ingress(priv, fq, &fq_cbs->tx_defq);
+			priv->conf_fqs[conf_cnt++] = &fq->fq_base;
+			break;
+		case FQ_TYPE_TX_ERROR:
+			DPA_ERR_ON(!priv->mac_dev);
+			dpa_setup_ingress(priv, fq, &fq_cbs->tx_errq);
+			break;
+		default:
+			dev_warn(priv->net_dev->dev.parent,
+				 "Unknown FQ type detected!\n");
+			break;
+		}
+	}
+
+	/* The number of Tx queues may be smaller than the number of cores, if
+	 * the Tx queue range is specified in the device tree instead of being
+	 * dynamically allocated.
+	 * Make sure all CPUs receive a corresponding Tx queue.
+	 */
+	while (egress_cnt < DPAA_ETH_TX_QUEUES) {
+		list_for_each_entry(fq, &priv->dpa_fq_list, list) {
+			if (fq->fq_type != FQ_TYPE_TX)
+				continue;
+			priv->egress_fqs[egress_cnt++] = &fq->fq_base;
+			if (egress_cnt == DPAA_ETH_TX_QUEUES)
+				break;
+		}
+	}
+}
+
+int dpa_fq_init(struct dpa_fq *dpa_fq, bool td_enable)
+{
+	int err;
+	const struct dpa_priv_s	*priv;
+	struct device *dev;
+	struct qman_fq *fq;
+	struct qm_mcc_initfq initfq;
+	struct qman_fq *confq = NULL;
+	int queue_id;
+
+	priv = netdev_priv(dpa_fq->net_dev);
+	dev = dpa_fq->net_dev->dev.parent;
+
+	if (dpa_fq->fqid == 0)
+		dpa_fq->flags |= QMAN_FQ_FLAG_DYNAMIC_FQID;
+
+	dpa_fq->init = !(dpa_fq->flags & QMAN_FQ_FLAG_NO_MODIFY);
+
+	err = qman_create_fq(dpa_fq->fqid, dpa_fq->flags, &dpa_fq->fq_base);
+	if (err) {
+		dev_err(dev, "qman_create_fq() failed\n");
+		return err;
+	}
+	fq = &dpa_fq->fq_base;
+
+	if (dpa_fq->init) {
+		memset(&initfq, 0, sizeof(initfq));
+
+		initfq.we_mask = QM_INITFQ_WE_FQCTRL;
+		/* Note: we may get to keep an empty FQ in cache */
+		initfq.fqd.fq_ctrl = QM_FQCTRL_PREFERINCACHE;
+
+		/* Try to reduce the number of portal interrupts for
+		 * Tx Confirmation FQs.
+		 */
+		if (dpa_fq->fq_type == FQ_TYPE_TX_CONFIRM)
+			initfq.fqd.fq_ctrl |= QM_FQCTRL_HOLDACTIVE;
+
+		/* FQ placement */
+		initfq.we_mask |= QM_INITFQ_WE_DESTWQ;
+
+		initfq.fqd.dest.channel	= dpa_fq->channel;
+		initfq.fqd.dest.wq = dpa_fq->wq;
+
+		/* Put all egress queues in a congestion group of their own.
+		 * Sensu stricto, the Tx confirmation queues are Rx FQs,
+		 * rather than Tx - but they nonetheless account for the
+		 * memory footprint on behalf of egress traffic. We therefore
+		 * place them in the netdev's CGR, along with the Tx FQs.
+		 */
+		if (dpa_fq->fq_type == FQ_TYPE_TX ||
+		    dpa_fq->fq_type == FQ_TYPE_TX_CONFIRM ||
+		    dpa_fq->fq_type == FQ_TYPE_TX_CONF_MQ) {
+			initfq.we_mask |= QM_INITFQ_WE_CGID;
+			initfq.fqd.fq_ctrl |= QM_FQCTRL_CGE;
+			initfq.fqd.cgid = (u8)priv->cgr_data.cgr.cgrid;
+			/* Set a fixed overhead accounting, in an attempt to
+			 * reduce the impact of fixed-size skb shells and the
+			 * driver's needed headroom on system memory. This is
+			 * especially the case when the egress traffic is
+			 * composed of small datagrams.
+			 * Unfortunately, QMan's OAL value is capped to an
+			 * insufficient value, but even that is better than
+			 * no overhead accounting at all.
+			 */
+			initfq.we_mask |= QM_INITFQ_WE_OAC;
+			initfq.fqd.oac_init.oac = QM_OAC_CG;
+			initfq.fqd.oac_init.oal =
+				(signed char)(min(sizeof(struct sk_buff) +
+						  priv->tx_headroom,
+						  (size_t)FSL_QMAN_MAX_OAL));
+		}
+
+		if (td_enable) {
+			initfq.we_mask |= QM_INITFQ_WE_TDTHRESH;
+			qm_fqd_taildrop_set(&initfq.fqd.td,
+					    DPA_FQ_TD, 1);
+			initfq.fqd.fq_ctrl = QM_FQCTRL_TDE;
+		}
+
+		/* Configure the Tx confirmation queue, now that we know
+		 * which Tx queue it pairs with.
+		 */
+		if (dpa_fq->fq_type == FQ_TYPE_TX) {
+			queue_id = _dpa_tx_fq_to_id(priv, &dpa_fq->fq_base);
+			if (queue_id >= 0)
+				confq = priv->conf_fqs[queue_id];
+			if (confq) {
+				initfq.we_mask |= QM_INITFQ_WE_CONTEXTA;
+			/* ContextA: OVOM=1(use contextA2 bits instead of ICAD)
+			 *	     A2V=1 (contextA A2 field is valid)
+			 *	     A0V=1 (contextA A0 field is valid)
+			 *	     B0V=1 (contextB field is valid)
+			 * ContextA A2: EBD=1 (deallocate buffers inside FMan)
+			 * ContextB B0(ASPID): 0 (absolute Virtual Storage ID)
+			 */
+				initfq.fqd.context_a.hi = 0x1e000000;
+				initfq.fqd.context_a.lo = 0x80000000;
+			}
+		}
+
+		/* Put all *private* ingress queues in our "ingress CGR". */
+		if (priv->use_ingress_cgr &&
+		    (dpa_fq->fq_type == FQ_TYPE_RX_DEFAULT ||
+		     dpa_fq->fq_type == FQ_TYPE_RX_ERROR)) {
+			initfq.we_mask |= QM_INITFQ_WE_CGID;
+			initfq.fqd.fq_ctrl |= QM_FQCTRL_CGE;
+			initfq.fqd.cgid = (u8)priv->ingress_cgr.cgrid;
+			/* Set a fixed overhead accounting, just like for the
+			 * egress CGR.
+			 */
+			initfq.we_mask |= QM_INITFQ_WE_OAC;
+			initfq.fqd.oac_init.oac = QM_OAC_CG;
+			initfq.fqd.oac_init.oal =
+				(signed char)(min(sizeof(struct sk_buff) +
+				priv->tx_headroom, (size_t)FSL_QMAN_MAX_OAL));
+		}
+
+		/* Initialization common to all ingress queues */
+		if (dpa_fq->flags & QMAN_FQ_FLAG_NO_ENQUEUE) {
+			initfq.we_mask |= QM_INITFQ_WE_CONTEXTA;
+			initfq.fqd.fq_ctrl |=
+				QM_FQCTRL_CTXASTASHING | QM_FQCTRL_AVOIDBLOCK;
+			initfq.fqd.context_a.stashing.exclusive =
+				QM_STASHING_EXCL_DATA | QM_STASHING_EXCL_CTX |
+				QM_STASHING_EXCL_ANNOTATION;
+			initfq.fqd.context_a.stashing.data_cl = 2;
+			initfq.fqd.context_a.stashing.annotation_cl = 1;
+			initfq.fqd.context_a.stashing.context_cl =
+				DIV_ROUND_UP(sizeof(struct qman_fq), 64);
+		}
+
+		err = qman_init_fq(fq, QMAN_INITFQ_FLAG_SCHED, &initfq);
+		if (err < 0) {
+			dev_err(dev, "qman_init_fq(%u) = %d\n",
+				qman_fq_fqid(fq), err);
+			qman_destroy_fq(fq, 0);
+			return err;
+		}
+	}
+
+	dpa_fq->fqid = qman_fq_fqid(fq);
+
+	return 0;
+}
+
+static int _dpa_fq_free(struct device *dev, struct qman_fq *fq)
+{
+	int err, error;
+	struct dpa_fq *dpa_fq;
+	const struct dpa_priv_s	*priv;
+
+	err = 0;
+
+	dpa_fq = container_of(fq, struct dpa_fq, fq_base);
+	priv = netdev_priv(dpa_fq->net_dev);
+
+	if (dpa_fq->init) {
+		err = qman_retire_fq(fq, NULL);
+		if (err < 0 && netif_msg_drv(priv))
+			dev_err(dev, "qman_retire_fq(%u) = %d\n",
+				qman_fq_fqid(fq), err);
+
+		error = qman_oos_fq(fq);
+		if (error < 0 && netif_msg_drv(priv)) {
+			dev_err(dev, "qman_oos_fq(%u) = %d\n",
+				qman_fq_fqid(fq), error);
+			if (err >= 0)
+				err = error;
+		}
+	}
+
+	qman_destroy_fq(fq, 0);
+	list_del(&dpa_fq->list);
+
+	return err;
+}
+
+int dpa_fq_free(struct device *dev, struct list_head *list)
+{
+	int err, error;
+	struct dpa_fq *dpa_fq, *tmp;
+
+	err = 0;
+	list_for_each_entry_safe(dpa_fq, tmp, list, list) {
+		error = _dpa_fq_free(dev, (struct qman_fq *)dpa_fq);
+		if (error < 0 && err >= 0)
+			err = error;
+	}
+
+	return err;
+}
+
+static void
+dpaa_eth_init_tx_port(struct fman_port *port, struct dpa_fq *errq,
+		      struct dpa_fq *defq,
+		      struct dpa_buffer_layout_s *buf_layout)
+{
+	struct fman_port_params params;
+	struct fman_buffer_prefix_content buf_prefix_content;
+	int err;
+
+	memset(&params, 0, sizeof(params));
+	memset(&buf_prefix_content, 0, sizeof(buf_prefix_content));
+
+	buf_prefix_content.priv_data_size = buf_layout->priv_data_size;
+	buf_prefix_content.pass_prs_result = buf_layout->parse_results;
+	buf_prefix_content.pass_hash_result = buf_layout->hash_results;
+	buf_prefix_content.pass_time_stamp = buf_layout->time_stamp;
+	buf_prefix_content.data_align = buf_layout->data_align;
+
+	params.specific_params.non_rx_params.err_fqid = errq->fqid;
+	params.specific_params.non_rx_params.dflt_fqid = defq->fqid;
+
+	err = fman_port_config(port, &params);
+	if (err)
+		pr_info("fman_port_config failed\n");
+
+	err = fman_port_cfg_buf_prefix_content(port, &buf_prefix_content);
+	if (err)
+		pr_info("fman_port_cfg_buf_prefix_content failed\n");
+
+	err = fman_port_init(port);
+	if (err)
+		pr_err("fm_port_init failed\n");
+}
+
+static void
+dpaa_eth_init_rx_port(struct fman_port *port, struct dpa_bp *bp,
+		      size_t count, struct dpa_fq *errq, struct dpa_fq *defq,
+		      struct dpa_buffer_layout_s *buf_layout)
+{
+	struct fman_port_params params;
+	struct fman_buffer_prefix_content buf_prefix_content;
+	struct fman_port_rx_params *rx_p;
+	int i, err;
+
+	memset(&params, 0, sizeof(params));
+	memset(&buf_prefix_content, 0, sizeof(buf_prefix_content));
+
+	buf_prefix_content.priv_data_size = buf_layout->priv_data_size;
+	buf_prefix_content.pass_prs_result = buf_layout->parse_results;
+	buf_prefix_content.pass_hash_result = buf_layout->hash_results;
+	buf_prefix_content.pass_time_stamp = buf_layout->time_stamp;
+	buf_prefix_content.data_align = buf_layout->data_align;
+
+	rx_p = &params.specific_params.rx_params;
+	rx_p->err_fqid = errq->fqid;
+	rx_p->dflt_fqid = defq->fqid;
+
+	count = min(ARRAY_SIZE(rx_p->ext_buf_pools.ext_buf_pool), count);
+	rx_p->ext_buf_pools.num_of_pools_used = (u8)count;
+	for (i = 0; i < count; i++) {
+		rx_p->ext_buf_pools.ext_buf_pool[i].id =  bp[i].bpid;
+		rx_p->ext_buf_pools.ext_buf_pool[i].size = (u16)bp[i].size;
+	}
+
+	err = fman_port_config(port, &params);
+	if (err)
+		pr_info("fman_port_config failed\n");
+
+	err = fman_port_cfg_buf_prefix_content(port, &buf_prefix_content);
+	if (err)
+		pr_info("fman_port_cfg_buf_prefix_content failed\n");
+
+	err = fman_port_init(port);
+	if (err)
+		pr_err("fm_port_init failed\n");
+}
+
+void dpaa_eth_init_ports(struct mac_device *mac_dev,
+			 struct dpa_bp *bp, size_t count,
+			 struct fm_port_fqs *port_fqs,
+			 struct dpa_buffer_layout_s *buf_layout,
+			 struct device *dev)
+{
+	struct fman_port *rxport = mac_dev->port[RX];
+	struct fman_port *txport = mac_dev->port[TX];
+
+	dpaa_eth_init_tx_port(txport, port_fqs->tx_errq,
+			      port_fqs->tx_defq, &buf_layout[TX]);
+	dpaa_eth_init_rx_port(rxport, bp, count, port_fqs->rx_errq,
+			      port_fqs->rx_defq, &buf_layout[RX]);
+}
+
+void dpa_fd_release(const struct net_device *net_dev, const struct qm_fd *fd)
+{
+	struct dpa_bp *dpa_bp;
+	struct bm_buffer bmb;
+
+	memset(&bmb, 0, sizeof(bmb));
+	bm_buffer_set64(&bmb, fd->addr);
+
+	dpa_bp = dpa_bpid2pool(fd->bpid);
+	DPA_ERR_ON(!dpa_bp);
+
+	DPA_ERR_ON(fd->format == qm_fd_sg);
+
+	while (bman_release(dpa_bp->pool, &bmb, 1, 0))
+		cpu_relax();
+}
+
+/* Turn on HW checksum computation for this outgoing frame.
+ * If the current protocol is not something we support in this regard
+ * (or if the stack has already computed the SW checksum), we do nothing.
+ *
+ * Returns 0 if all goes well (or HW csum doesn't apply), and a negative value
+ * otherwise.
+ *
+ * Note that this function may modify the fd->cmd field and the skb data buffer
+ * (the Parse Results area).
+ */
+int dpa_enable_tx_csum(struct dpa_priv_s *priv,
+		       struct sk_buff *skb,
+		       struct qm_fd *fd,
+		       char *parse_results)
+{
+	struct fman_prs_result *parse_result;
+	struct iphdr *iph;
+	struct ipv6hdr *ipv6h = NULL;
+	u8 l4_proto;
+	u16 ethertype = ntohs(skb->protocol);
+	int retval = 0;
+
+	if (skb->ip_summed != CHECKSUM_PARTIAL)
+		return 0;
+
+	/* Note: L3 csum seems to be already computed in sw, but we can't choose
+	 * L4 alone from the FM configuration anyway.
+	 */
+
+	/* Fill in some fields of the Parse Results array, so the FMan
+	 * can find them as if they came from the FMan Parser.
+	 */
+	parse_result = (struct fman_prs_result *)parse_results;
+
+	/* If we're dealing with VLAN, get the real Ethernet type */
+	if (ethertype == ETH_P_8021Q) {
+		/* We can't always assume the MAC header is set correctly
+		 * by the stack, so reset to beginning of skb->data
+		 */
+		skb_reset_mac_header(skb);
+		ethertype = ntohs(vlan_eth_hdr(skb)->h_vlan_encapsulated_proto);
+	}
+
+	/* Fill in the relevant L3 parse result fields
+	 * and read the L4 protocol type
+	 */
+	switch (ethertype) {
+	case ETH_P_IP:
+		parse_result->l3r = cpu_to_be16(FM_L3_PARSE_RESULT_IPV4);
+		iph = ip_hdr(skb);
+		DPA_ERR_ON(!iph);
+		l4_proto = iph->protocol;
+		break;
+	case ETH_P_IPV6:
+		parse_result->l3r = cpu_to_be16(FM_L3_PARSE_RESULT_IPV6);
+		ipv6h = ipv6_hdr(skb);
+		DPA_ERR_ON(!ipv6h);
+		l4_proto = ipv6h->nexthdr;
+		break;
+	default:
+		/* We shouldn't even be here */
+		if (net_ratelimit())
+			netif_alert(priv, tx_err, priv->net_dev,
+				    "Can't compute HW csum for L3 proto 0x%x\n",
+				    ntohs(skb->protocol));
+		retval = -EIO;
+		goto return_error;
+	}
+
+	/* Fill in the relevant L4 parse result fields */
+	switch (l4_proto) {
+	case IPPROTO_UDP:
+		parse_result->l4r = FM_L4_PARSE_RESULT_UDP;
+		break;
+	case IPPROTO_TCP:
+		parse_result->l4r = FM_L4_PARSE_RESULT_TCP;
+		break;
+	default:
+		/* This can as well be a BUG() */
+		if (net_ratelimit())
+			netif_alert(priv, tx_err, priv->net_dev,
+				    "Can't compute HW csum for L4 proto 0x%x\n",
+				    l4_proto);
+		retval = -EIO;
+		goto return_error;
+	}
+
+	/* At index 0 is IPOffset_1 as defined in the Parse Results */
+	parse_result->ip_off[0] = (u8)skb_network_offset(skb);
+	parse_result->l4_off = (u8)skb_transport_offset(skb);
+
+	/* Enable L3 (and L4, if TCP or UDP) HW checksum. */
+	fd->cmd |= FM_FD_CMD_RPD | FM_FD_CMD_DTC;
+
+	/* On P1023 and similar platforms fd->cmd interpretation could
+	 * be disabled by setting CONTEXT_A bit ICMD; currently this bit
+	 * is not set so we do not need to check; in the future, if/when
+	 * using context_a we need to check this bit
+	 */
+
+return_error:
+	return retval;
+}
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.h b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.h
new file mode 100644
index 0000000..68843c0
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.h
@@ -0,0 +1,98 @@
+/* Copyright 2008 - 2015 Freescale Semiconductor, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *	 notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *	 notice, this list of conditions and the following disclaimer in the
+ *	 documentation and/or other materials provided with the distribution.
+ *     * Neither the name of Freescale Semiconductor nor the
+ *	 names of its contributors may be used to endorse or promote products
+ *	 derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __DPAA_ETH_COMMON_H
+#define __DPAA_ETH_COMMON_H
+
+#include <linux/etherdevice.h>
+#include <soc/fsl/bman.h>
+#include <linux/of_platform.h>
+
+#include "dpaa_eth.h"
+
+#define DPA_BUFF_RELEASE_MAX 8 /* maximum number of buffers released at once */
+
+/* used in napi related functions */
+extern u16 qman_portal_max;
+
+int dpa_netdev_init(struct net_device *net_dev,
+		    const u8 *mac_addr,
+		    u16 tx_timeout);
+int dpa_start(struct net_device *net_dev);
+int dpa_stop(struct net_device *net_dev);
+void dpa_timeout(struct net_device *net_dev);
+struct rtnl_link_stats64 *dpa_get_stats64(struct net_device *net_dev,
+					  struct rtnl_link_stats64 *stats);
+int dpa_change_mtu(struct net_device *net_dev, int new_mtu);
+int dpa_ndo_init(struct net_device *net_dev);
+int dpa_set_features(struct net_device *dev, netdev_features_t features);
+netdev_features_t dpa_fix_features(struct net_device *dev,
+				   netdev_features_t features);
+int dpa_remove(struct platform_device *pdev);
+struct mac_device *dpa_mac_dev_get(struct platform_device *pdev);
+int dpa_mac_hw_index_get(struct platform_device *pdev);
+int dpa_mac_fman_index_get(struct platform_device *pdev);
+int dpa_set_mac_address(struct net_device *net_dev, void *addr);
+void dpa_set_rx_mode(struct net_device *net_dev);
+void dpa_set_buffers_layout(struct mac_device *mac_dev,
+			    struct dpa_buffer_layout_s *layout);
+int dpa_bp_alloc(struct dpa_bp *dpa_bp);
+void dpa_bp_free(struct dpa_priv_s *priv);
+struct dpa_bp *dpa_bpid2pool(int bpid);
+void dpa_bpid2pool_map(int bpid, struct dpa_bp *dpa_bp);
+bool dpa_bpid2pool_use(int bpid);
+void dpa_bp_drain(struct dpa_bp *bp);
+struct dpa_fq *dpa_fq_alloc(struct device *dev,
+			    const struct fqid_cell *fqids,
+			    struct list_head *list,
+			    enum dpa_fq_type fq_type);
+int dpa_fq_probe_mac(struct device *dev, struct list_head *list,
+		     struct fm_port_fqs *port_fqs,
+		     bool tx_conf_fqs_per_core,
+		     enum port_type ptype);
+int dpa_get_channel(void);
+void dpa_release_channel(void);
+int dpaa_eth_add_channel(void *__arg);
+int dpaa_eth_cgr_init(struct dpa_priv_s *priv);
+void dpa_fq_setup(struct dpa_priv_s *priv, const struct dpa_fq_cbs_t *fq_cbs,
+		  struct fman_port *tx_port);
+int dpa_fq_init(struct dpa_fq *dpa_fq, bool td_enable);
+int dpa_fq_free(struct device *dev, struct list_head *list);
+void dpaa_eth_init_ports(struct mac_device *mac_dev,
+			 struct dpa_bp *bp, size_t count,
+			 struct fm_port_fqs *port_fqs,
+			 struct dpa_buffer_layout_s *buf_layout,
+			 struct device *dev);
+void dpa_fd_release(const struct net_device *net_dev, const struct qm_fd *fd);
+int dpa_enable_tx_csum(struct dpa_priv_s *priv,
+		       struct sk_buff *skb,
+		       struct qm_fd *fd,
+		       char *parse_results);
+#endif	/* __DPAA_ETH_COMMON_H */
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth_sg.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_sg.c
new file mode 100644
index 0000000..115798b
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_sg.c
@@ -0,0 +1,408 @@
+/* Copyright 2012 - 2015 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *	 notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *	 notice, this list of conditions and the following disclaimer in the
+ *	 documentation and/or other materials provided with the distribution.
+ *     * Neither the name of Freescale Semiconductor nor the
+ *	 names of its contributors may be used to endorse or promote products
+ *	 derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/highmem.h>
+#include <soc/fsl/bman.h>
+
+#include "dpaa_eth.h"
+#include "dpaa_eth_common.h"
+
+/* Convenience macros for storing/retrieving the skb back-pointers.
+ *
+ * NB: @off is an offset from a (struct sk_buff **) pointer!
+ */
+#define DPA_WRITE_SKB_PTR(skb, skbh, addr, off) \
+	{ \
+		skbh = (struct sk_buff **)addr; \
+		*(skbh + (off)) = skb; \
+	}
+#define DPA_READ_SKB_PTR(skb, skbh, addr, off) \
+	{ \
+		skbh = (struct sk_buff **)addr; \
+		skb = *(skbh + (off)); \
+	}
+
+static int _dpa_bp_add_8_bufs(const struct dpa_bp *dpa_bp)
+{
+	struct bm_buffer bmb[8];
+	void *new_buf;
+	dma_addr_t addr;
+	u8 i;
+	struct device *dev = dpa_bp->dev;
+	struct sk_buff *skb, **skbh;
+
+	memset(bmb, 0, sizeof(bmb));
+
+	for (i = 0; i < 8; i++) {
+		/* We'll prepend the skb back-pointer; can't use the DPA
+		 * priv space, because FMan will overwrite it (from offset 0)
+		 * if it ends up being the second, third, etc. fragment
+		 * in a S/G frame.
+		 *
+		 * We only need enough space to store a pointer, but allocate
+		 * an entire cacheline for performance reasons.
+		 */
+		new_buf = netdev_alloc_frag(SMP_CACHE_BYTES + DPA_BP_RAW_SIZE);
+		if (unlikely(!new_buf))
+			goto netdev_alloc_failed;
+		new_buf = PTR_ALIGN(new_buf + SMP_CACHE_BYTES, SMP_CACHE_BYTES);
+
+		skb = build_skb(new_buf, DPA_SKB_SIZE(dpa_bp->size) +
+			SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
+		if (unlikely(!skb)) {
+			put_page(virt_to_head_page(new_buf));
+			goto build_skb_failed;
+		}
+		DPA_WRITE_SKB_PTR(skb, skbh, new_buf, -1);
+
+		addr = dma_map_single(dev, new_buf,
+				      dpa_bp->size, DMA_BIDIRECTIONAL);
+		if (unlikely(dma_mapping_error(dev, addr)))
+			goto dma_map_failed;
+
+		bm_buffer_set64(&bmb[i], addr);
+	}
+
+release_bufs:
+	/* Release the buffers. In case bman is busy, keep trying
+	 * until successful. bman_release() is guaranteed to succeed
+	 * in a reasonable amount of time
+	 */
+	while (unlikely(bman_release(dpa_bp->pool, bmb, i, 0)))
+		cpu_relax();
+	return i;
+
+dma_map_failed:
+	kfree_skb(skb);
+
+build_skb_failed:
+netdev_alloc_failed:
+	net_err_ratelimited("dpa_bp_add_8_bufs() failed\n");
+	WARN_ONCE(1, "Memory allocation failure on Rx\n");
+
+	bm_buffer_set64(&bmb[i], 0);
+	/* Avoid releasing a completely null buffer; bman_release() requires
+	 * at least one buffer.
+	 */
+	if (likely(i))
+		goto release_bufs;
+
+	return 0;
+}
+
+/* Cold path wrapper over _dpa_bp_add_8_bufs(). */
+static void dpa_bp_add_8_bufs(const struct dpa_bp *dpa_bp, int cpu)
+{
+	int *count_ptr = per_cpu_ptr(dpa_bp->percpu_count, cpu);
+	*count_ptr += _dpa_bp_add_8_bufs(dpa_bp);
+}
+
+int dpa_bp_priv_seed(struct dpa_bp *dpa_bp)
+{
+	int i;
+
+	/* Give each CPU an allotment of "config_count" buffers */
+	for_each_possible_cpu(i) {
+		int j;
+
+		/* Although we access another CPU's counters here
+		 * we do it at boot time so it is safe
+		 */
+		for (j = 0; j < dpa_bp->config_count; j += 8)
+			dpa_bp_add_8_bufs(dpa_bp, i);
+	}
+	return 0;
+}
+
+/* Add buffers/(pages) for Rx processing whenever bpool count falls below
+ * REFILL_THRESHOLD.
+ */
+int dpaa_eth_refill_bpools(struct dpa_bp *dpa_bp, int *countptr)
+{
+	int count = *countptr;
+	int new_bufs;
+
+	if (unlikely(count < FSL_DPAA_ETH_REFILL_THRESHOLD)) {
+		do {
+			new_bufs = _dpa_bp_add_8_bufs(dpa_bp);
+			if (unlikely(!new_bufs)) {
+				/* Avoid looping forever if we've temporarily
+				 * run out of memory. We'll try again at the
+				 * next NAPI cycle.
+				 */
+				break;
+			}
+			count += new_bufs;
+		} while (count < FSL_DPAA_ETH_MAX_BUF_COUNT);
+
+		*countptr = count;
+		if (unlikely(count < FSL_DPAA_ETH_MAX_BUF_COUNT))
+			return -ENOMEM;
+	}
+
+	return 0;
+}
+
+/* Cleanup function for outgoing frame descriptors that were built on Tx path,
+ * either contiguous frames or scatter/gather ones.
+ * Skb freeing is not handled here.
+ *
+ * This function may be called on error paths in the Tx function, so guard
+ * against cases when not all fd relevant fields were filled in.
+ *
+ * Return the skb backpointer, since for S/G frames the buffer containing it
+ * gets freed here.
+ */
+struct sk_buff *_dpa_cleanup_tx_fd(const struct dpa_priv_s *priv,
+				   const struct qm_fd *fd)
+{
+	struct dpa_bp *dpa_bp = priv->dpa_bp;
+	dma_addr_t addr = qm_fd_addr(fd);
+	struct sk_buff **skbh;
+	struct sk_buff *skb = NULL;
+	const enum dma_data_direction dma_dir = DMA_TO_DEVICE;
+
+	/* retrieve skb back pointer */
+	DPA_READ_SKB_PTR(skb, skbh, phys_to_virt(addr), 0);
+	dma_unmap_single(dpa_bp->dev, addr,
+			 skb_tail_pointer(skb) - (u8 *)skbh, dma_dir);
+	return skb;
+}
+
+/* Build a linear skb around the received buffer.
+ * We are guaranteed there is enough room at the end of the data buffer to
+ * accommodate the shared info area of the skb.
+ */
+static struct sk_buff *contig_fd_to_skb(const struct dpa_priv_s *priv,
+					const struct qm_fd *fd)
+{
+	struct sk_buff *skb = NULL, **skbh;
+	ssize_t fd_off = dpa_fd_offset(fd);
+	dma_addr_t addr = qm_fd_addr(fd);
+	void *vaddr;
+
+	vaddr = phys_to_virt(addr);
+	DPA_ERR_ON(!IS_ALIGNED((unsigned long)vaddr, SMP_CACHE_BYTES));
+
+	/* Retrieve the skb and adjust data and tail pointers, to make sure
+	 * forwarded skbs will have enough space on Tx if extra headers
+	 * are added.
+	 */
+	DPA_READ_SKB_PTR(skb, skbh, vaddr, -1);
+
+	DPA_ERR_ON(fd_off != priv->rx_headroom);
+	skb_reserve(skb, fd_off);
+	skb_put(skb, dpa_fd_length(fd));
+
+	skb->ip_summed = CHECKSUM_NONE;
+
+	return skb;
+}
+
+void _dpa_rx(struct net_device *net_dev,
+	     struct qman_portal *portal,
+	     const struct dpa_priv_s *priv,
+	     struct dpa_percpu_priv_s *percpu_priv,
+	     const struct qm_fd *fd,
+	     u32 fqid,
+	     int *count_ptr)
+{
+	struct dpa_bp *dpa_bp;
+	struct sk_buff *skb;
+	dma_addr_t addr = qm_fd_addr(fd);
+	u32 fd_status = fd->status;
+	unsigned int skb_len;
+	struct rtnl_link_stats64 *percpu_stats = &percpu_priv->stats;
+
+	if (unlikely(fd_status & FM_FD_STAT_RX_ERRORS) != 0) {
+		if (net_ratelimit())
+			netif_warn(priv, hw, net_dev, "FD status = 0x%08x\n",
+				   fd_status & FM_FD_STAT_RX_ERRORS);
+
+		percpu_stats->rx_errors++;
+		goto _release_frame;
+	}
+
+	dpa_bp = priv->dpa_bp;
+	DPA_ERR_ON(dpa_bp != dpa_bpid2pool(fd->bpid));
+
+	/* prefetch the first 64 bytes of the frame */
+	dma_unmap_single(dpa_bp->dev, addr, dpa_bp->size, DMA_BIDIRECTIONAL);
+	prefetch(phys_to_virt(addr) + dpa_fd_offset(fd));
+
+	/* The only FD type that we may receive is contig */
+	DPA_ERR_ON((fd->format != qm_fd_contig));
+
+	skb = contig_fd_to_skb(priv, fd);
+
+	/* Account for the contig buffer
+	 * having been removed from the pool.
+	 */
+	(*count_ptr)--;
+	skb->protocol = eth_type_trans(skb, net_dev);
+
+	/* IP Reassembled frames are allowed to be larger than MTU */
+	if (unlikely(dpa_check_rx_mtu(skb, net_dev->mtu) &&
+		     !(fd_status & FM_FD_IPR))) {
+		percpu_stats->rx_dropped++;
+		goto drop_bad_frame;
+	}
+
+	skb_len = skb->len;
+
+	if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
+		goto packet_dropped;
+
+	percpu_stats->rx_packets++;
+	percpu_stats->rx_bytes += skb_len;
+
+packet_dropped:
+	return;
+
+drop_bad_frame:
+	dev_kfree_skb(skb);
+	return;
+
+_release_frame:
+	dpa_fd_release(net_dev, fd);
+}
+
+static int skb_to_contig_fd(struct dpa_priv_s *priv,
+			    struct sk_buff *skb, struct qm_fd *fd,
+			    int *count_ptr, int *offset)
+{
+	struct sk_buff **skbh;
+	dma_addr_t addr;
+	struct dpa_bp *dpa_bp = priv->dpa_bp;
+	struct net_device *net_dev = priv->net_dev;
+	int err;
+	enum dma_data_direction dma_dir;
+	unsigned char *buffer_start;
+
+	{
+		/* We are guaranteed to have at least tx_headroom bytes
+		 * available, so just use that for offset.
+		 */
+		fd->bpid = 0xff;
+		buffer_start = skb->data - priv->tx_headroom;
+		fd->offset = priv->tx_headroom;
+		dma_dir = DMA_TO_DEVICE;
+
+		DPA_WRITE_SKB_PTR(skb, skbh, buffer_start, 0);
+	}
+
+	/* Enable L3/L4 hardware checksum computation.
+	 *
+	 * We must do this before dma_map_single(DMA_TO_DEVICE), because we may
+	 * need to write into the skb.
+	 */
+	err = dpa_enable_tx_csum(priv, skb, fd,
+				 ((char *)skbh) + DPA_TX_PRIV_DATA_SIZE);
+	if (unlikely(err < 0)) {
+		if (net_ratelimit())
+			netif_err(priv, tx_err, net_dev, "HW csum error: %d\n",
+				  err);
+		return err;
+	}
+
+	/* Fill in the rest of the FD fields */
+	fd->format = qm_fd_contig;
+	fd->length20 = skb->len;
+	fd->cmd |= FM_FD_CMD_FCO;
+
+	/* Map the entire buffer size that may be seen by FMan, but no more */
+	addr = dma_map_single(dpa_bp->dev, skbh,
+			      skb_tail_pointer(skb) - buffer_start, dma_dir);
+	if (unlikely(dma_mapping_error(dpa_bp->dev, addr))) {
+		if (net_ratelimit())
+			netif_err(priv, tx_err, net_dev, "dma_map_single() failed\n");
+		return -EINVAL;
+	}
+	fd->addr_hi = (u8)upper_32_bits(addr);
+	fd->addr_lo = lower_32_bits(addr);
+
+	return 0;
+}
+
+int dpa_tx(struct sk_buff *skb, struct net_device *net_dev)
+{
+	struct dpa_priv_s *priv;
+	struct qm_fd fd;
+	struct dpa_percpu_priv_s *percpu_priv;
+	struct rtnl_link_stats64 *percpu_stats;
+	int err = 0;
+	const int queue_mapping = dpa_get_queue_mapping(skb);
+	int *countptr, offset = 0;
+
+	priv = netdev_priv(net_dev);
+	/* Non-migratable context, safe to use raw_cpu_ptr */
+	percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+	percpu_stats = &percpu_priv->stats;
+	countptr = raw_cpu_ptr(priv->dpa_bp->percpu_count);
+
+	clear_fd(&fd);
+
+	/* We're going to store the skb backpointer at the beginning
+	 * of the data buffer, so we need a privately owned skb
+	 *
+	 * We've made sure skb is not shared in dev->priv_flags,
+	 * we need to verify the skb head is not cloned
+	 */
+	if (skb_cow_head(skb, priv->tx_headroom))
+		goto enomem;
+
+	DPA_ERR_ON(skb_is_nonlinear(skb));
+
+	/* Finally, create a contig FD from this skb */
+	err = skb_to_contig_fd(priv, skb, &fd, countptr, &offset);
+	if (unlikely(err < 0))
+		goto skb_to_fd_failed;
+
+	if (likely(dpa_xmit(priv, percpu_stats, queue_mapping, &fd) == 0))
+		return NETDEV_TX_OK;
+
+	/* dpa_xmit failed */
+	if (fd.bpid != 0xff) {
+		(*countptr)--;
+		dpa_fd_release(net_dev, &fd);
+		percpu_stats->tx_errors++;
+		return NETDEV_TX_OK;
+	}
+	_dpa_cleanup_tx_fd(priv, &fd);
+skb_to_fd_failed:
+enomem:
+	percpu_stats->tx_errors++;
+	dev_kfree_skb(skb);
+	return NETDEV_TX_OK;
+}
-- 
1.7.11.7

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