dpaa_eth: add support for DPAA Ethernet

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

6 files changed, 2850 insertions, 0 deletions

diff --git a/drivers/net/ethernet/freescale/Kconfig b/drivers/net/ethernet/freescale/Kconfig
index d1ca45fbb164..aa3f615886b4 100644
--- a/drivers/net/ethernet/freescale/Kconfig
+++ b/drivers/net/ethernet/freescale/Kconfig
@@ -93,4 +93,6 @@ 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 cbe21dc7e37e..4a13115155c9 100644
--- a/drivers/net/ethernet/freescale/Makefile
+++ b/drivers/net/ethernet/freescale/Makefile
@@ -22,3 +22,4 @@ obj-$(CONFIG_UCC_GETH) += ucc_geth_driver.o
 ucc_geth_driver-objs := ucc_geth.o ucc_geth_ethtool.o
 
 obj-$(CONFIG_FSL_FMAN) += fman/
+obj-$(CONFIG_FSL_DPAA_ETH) += dpaa/
diff --git a/drivers/net/ethernet/freescale/dpaa/Kconfig b/drivers/net/ethernet/freescale/dpaa/Kconfig
new file mode 100644
index 000000000000..f3a3454805f9
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/Kconfig
@@ -0,0 +1,10 @@
+menuconfig FSL_DPAA_ETH
+	tristate "DPAA Ethernet"
+	depends on FSL_SOC && FSL_DPAA && 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.
diff --git a/drivers/net/ethernet/freescale/dpaa/Makefile b/drivers/net/ethernet/freescale/dpaa/Makefile
new file mode 100644
index 000000000000..fc76029281c7
--- /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
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 000000000000..8b9b0720f8b1
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
@@ -0,0 +1,2682 @@
+/* Copyright 2008 - 2016 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_platform.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.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/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/highmem.h>
+#include <linux/percpu.h>
+#include <linux/dma-mapping.h>
+#include <linux/sort.h>
+#include <soc/fsl/bman.h>
+#include <soc/fsl/qman.h>
+
+#include "fman.h"
+#include "fman_port.h"
+#include "mac.h"
+#include "dpaa_eth.h"
+
+static int debug = -1;
+module_param(debug, int, 0444);
+MODULE_PARM_DESC(debug, "Module/Driver verbosity level (0=none,...,16=all)");
+
+static u16 tx_timeout = 1000;
+module_param(tx_timeout, ushort, 0444);
+MODULE_PARM_DESC(tx_timeout, "The Tx timeout in ms");
+
+#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)
+
+#define DPAA_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | \
+			  NETIF_MSG_LINK | NETIF_MSG_IFUP | \
+			  NETIF_MSG_IFDOWN)
+
+#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.
+ */
+
+/* Size in bytes of the FQ taildrop threshold */
+#define DPAA_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
+ */
+
+/* Largest value that the FQD's OAL field can hold */
+#define FSL_QMAN_MAX_OAL	127
+
+/* Default alignment for start of data in an Rx FD */
+#define DPAA_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 */
+/* L4 Type field: UDP */
+#define FM_L4_PARSE_RESULT_UDP	0x40
+/* L4 Type field: TCP */
+#define FM_L4_PARSE_RESULT_TCP	0x20
+
+#define DPAA_SGT_MAX_ENTRIES 16 /* maximum number of entries in SG Table */
+#define DPAA_BUFF_RELEASE_MAX 8 /* maximum number of buffers released at once */
+
+#define FSL_DPAA_BPID_INV		0xff
+#define FSL_DPAA_ETH_MAX_BUF_COUNT	128
+#define FSL_DPAA_ETH_REFILL_THRESHOLD	80
+
+#define DPAA_TX_PRIV_DATA_SIZE	16
+#define DPAA_PARSE_RESULTS_SIZE sizeof(struct fman_prs_result)
+#define DPAA_TIME_STAMP_SIZE 8
+#define DPAA_HASH_RESULTS_SIZE 8
+#define DPAA_RX_PRIV_DATA_SIZE	(u16)(DPAA_TX_PRIV_DATA_SIZE + \
+					dpaa_rx_extra_headroom)
+
+#define DPAA_ETH_RX_QUEUES	128
+
+#define DPAA_ENQUEUE_RETRIES	100000
+
+enum port_type {RX, TX};
+
+struct fm_port_fqs {
+	struct dpaa_fq *tx_defq;
+	struct dpaa_fq *tx_errq;
+	struct dpaa_fq *rx_defq;
+	struct dpaa_fq *rx_errq;
+};
+
+/* All the dpa bps in use at any moment */
+static struct dpaa_bp *dpaa_bp_array[BM_MAX_NUM_OF_POOLS];
+
+/* The raw buffer size must be cacheline aligned */
+#define DPAA_BP_RAW_SIZE 4096
+/* When using more than one buffer pool, the raw sizes are as follows:
+ * 1 bp: 4KB
+ * 2 bp: 2KB, 4KB
+ * 3 bp: 1KB, 2KB, 4KB
+ * 4 bp: 1KB, 2KB, 4KB, 8KB
+ */
+static inline size_t bpool_buffer_raw_size(u8 index, u8 cnt)
+{
+	size_t res = DPAA_BP_RAW_SIZE / 4;
+	u8 i;
+
+	for (i = (cnt < 3) ? cnt : 3; i < 3 + index; i++)
+		res *= 2;
+	return res;
+}
+
+/* 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, so we reserve some more space for start-of-buffer
+ * alignment.
+ */
+#define dpaa_bp_size(raw_size) SKB_WITH_OVERHEAD((raw_size) - SMP_CACHE_BYTES)
+
+static int dpaa_max_frm;
+
+static int dpaa_rx_extra_headroom;
+
+#define dpaa_get_max_mtu()	\
+	(dpaa_max_frm - (VLAN_ETH_HLEN + ETH_FCS_LEN))
+
+static int dpaa_netdev_init(struct net_device *net_dev,
+			    const struct net_device_ops *dpaa_ops,
+			    u16 tx_timeout)
+{
+	struct dpaa_priv *priv = netdev_priv(net_dev);
+	struct device *dev = net_dev->dev.parent;
+	struct dpaa_percpu_priv *percpu_priv;
+	const u8 *mac_addr;
+	int i, err;
+
+	/* 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 = dpaa_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->min_mtu = ETH_MIN_MTU;
+	net_dev->max_mtu = dpaa_get_max_mtu();
+
+	net_dev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+				 NETIF_F_LLTX);
+
+	net_dev->hw_features |= NETIF_F_SG | NETIF_F_HIGHDMA;
+	/* The kernels enables GSO automatically, if we declare NETIF_F_SG.
+	 * For conformity, we'll still declare GSO explicitly.
+	 */
+	net_dev->features |= NETIF_F_GSO;
+
+	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;
+}
+
+static int dpaa_stop(struct net_device *net_dev)
+{
+	struct mac_device *mac_dev;
+	struct dpaa_priv *priv;
+	int i, err, error;
+
+	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 (net_dev->phydev)
+		phy_disconnect(net_dev->phydev);
+	net_dev->phydev = NULL;
+
+	return err;
+}
+
+static void dpaa_tx_timeout(struct net_device *net_dev)
+{
+	struct dpaa_percpu_priv *percpu_priv;
+	const struct dpaa_priv	*priv;
+
+	priv = netdev_priv(net_dev);
+	percpu_priv = this_cpu_ptr(priv->percpu_priv);
+
+	netif_crit(priv, timer, net_dev, "Transmit timeout latency: %u ms\n",
+		   jiffies_to_msecs(jiffies - dev_trans_start(net_dev)));
+
+	percpu_priv->stats.tx_errors++;
+}
+
+/* Calculates the statistics for the given device by adding the statistics
+ * collected by each CPU.
+ */
+static struct rtnl_link_stats64 *dpaa_get_stats64(struct net_device *net_dev,
+						  struct rtnl_link_stats64 *s)
+{
+	int numstats = sizeof(struct rtnl_link_stats64) / sizeof(u64);
+	struct dpaa_priv *priv = netdev_priv(net_dev);
+	struct dpaa_percpu_priv *percpu_priv;
+	u64 *netstats = (u64 *)s;
+	u64 *cpustats;
+	int i, j;
+
+	for_each_possible_cpu(i) {
+		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+
+		cpustats = (u64 *)&percpu_priv->stats;
+
+		/* add stats from all CPUs */
+		for (j = 0; j < numstats; j++)
+			netstats[j] += cpustats[j];
+	}
+
+	return s;
+}
+
+static struct mac_device *dpaa_mac_dev_get(struct platform_device *pdev)
+{
+	struct platform_device *of_dev;
+	struct dpaa_eth_data *eth_data;
+	struct device *dpaa_dev, *dev;
+	struct device_node *mac_node;
+	struct mac_device *mac_dev;
+
+	dpaa_dev = &pdev->dev;
+	eth_data = dpaa_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(dpaa_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(dpaa_dev, "dev_get_drvdata(%s) failed\n",
+			dev_name(dev));
+		return ERR_PTR(-EINVAL);
+	}
+
+	return mac_dev;
+}
+
+static int dpaa_set_mac_address(struct net_device *net_dev, void *addr)
+{
+	const struct dpaa_priv *priv;
+	struct mac_device *mac_dev;
+	struct sockaddr old_addr;
+	int err;
+
+	priv = netdev_priv(net_dev);
+
+	memcpy(old_addr.sa_data, net_dev->dev_addr,  ETH_ALEN);
+
+	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);
+		/* reverting to previous address */
+		eth_mac_addr(net_dev, &old_addr);
+
+		return err;
+	}
+
+	return 0;
+}
+
+static void dpaa_set_rx_mode(struct net_device *net_dev)
+{
+	const struct dpaa_priv	*priv;
+	int err;
+
+	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);
+}
+
+static struct dpaa_bp *dpaa_bpid2pool(int bpid)
+{
+	if (WARN_ON(bpid < 0 || bpid >= BM_MAX_NUM_OF_POOLS))
+		return NULL;
+
+	return dpaa_bp_array[bpid];
+}
+
+/* checks if this bpool is already allocated */
+static bool dpaa_bpid2pool_use(int bpid)
+{
+	if (dpaa_bpid2pool(bpid)) {
+		atomic_inc(&dpaa_bp_array[bpid]->refs);
+		return true;
+	}
+
+	return false;
+}
+
+/* called only once per bpid by dpaa_bp_alloc_pool() */
+static void dpaa_bpid2pool_map(int bpid, struct dpaa_bp *dpaa_bp)
+{
+	dpaa_bp_array[bpid] = dpaa_bp;
+	atomic_set(&dpaa_bp->refs, 1);
+}
+
+static int dpaa_bp_alloc_pool(struct dpaa_bp *dpaa_bp)
+{
+	int err;
+
+	if (dpaa_bp->size == 0 || dpaa_bp->config_count == 0) {
+		pr_err("%s: Buffer pool is not properly initialized! Missing size or initial number of buffers\n",
+		       __func__);
+		return -EINVAL;
+	}
+
+	/* If the pool is already specified, we only create one per bpid */
+	if (dpaa_bp->bpid != FSL_DPAA_BPID_INV &&
+	    dpaa_bpid2pool_use(dpaa_bp->bpid))
+		return 0;
+
+	if (dpaa_bp->bpid == FSL_DPAA_BPID_INV) {
+		dpaa_bp->pool = bman_new_pool();
+		if (!dpaa_bp->pool) {
+			pr_err("%s: bman_new_pool() failed\n",
+			       __func__);
+			return -ENODEV;
+		}
+
+		dpaa_bp->bpid = (u8)bman_get_bpid(dpaa_bp->pool);
+	}
+
+	if (dpaa_bp->seed_cb) {
+		err = dpaa_bp->seed_cb(dpaa_bp);
+		if (err)
+			goto pool_seed_failed;
+	}
+
+	dpaa_bpid2pool_map(dpaa_bp->bpid, dpaa_bp);
+
+	return 0;
+
+pool_seed_failed:
+	pr_err("%s: pool seeding failed\n", __func__);
+	bman_free_pool(dpaa_bp->pool);
+
+	return err;
+}
+
+/* remove and free all the buffers from the given buffer pool */
+static void dpaa_bp_drain(struct dpaa_bp *bp)
+{
+	u8 num = 8;
+	int ret;
+
+	do {
+		struct bm_buffer bmb[8];
+		int i;
+
+		ret = bman_acquire(bp->pool, bmb, num);
+		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;
+			}
+		}
+
+		if (bp->free_buf_cb)
+			for (i = 0; i < num; i++)
+				bp->free_buf_cb(bp, &bmb[i]);
+	} while (ret > 0);
+}
+
+static void dpaa_bp_free(struct dpaa_bp *dpaa_bp)
+{
+	struct dpaa_bp *bp = dpaa_bpid2pool(dpaa_bp->bpid);
+
+	/* the mapping between bpid and dpaa_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)
+		dpaa_bp_drain(bp);
+
+	dpaa_bp_array[bp->bpid] = NULL;
+	bman_free_pool(bp->pool);
+}
+
+static void dpaa_bps_free(struct dpaa_priv *priv)
+{
+	int i;
+
+	for (i = 0; i < DPAA_BPS_NUM; i++)
+		dpaa_bp_free(priv->dpaa_bps[i]);
+}
+
+/* Use multiple WQs for FQ assignment:
+ *	- Tx Confirmation queues go to WQ1.
+ *	- 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).
+ *	- Rx Default and Tx queues go to WQ3 (no differentiation between
+ *	  Rx and Tx traffic).
+ * 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 dpaa_assign_wq(struct dpaa_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_ERROR:
+	case FQ_TYPE_TX_ERROR:
+		fq->wq = 2;
+		break;
+	case FQ_TYPE_RX_DEFAULT:
+	case FQ_TYPE_TX:
+		fq->wq = 3;
+		break;
+	default:
+		WARN(1, "Invalid FQ type %d for FQID %d!\n",
+		     fq->fq_type, fq->fqid);
+	}
+}
+
+static struct dpaa_fq *dpaa_fq_alloc(struct device *dev,
+				     u32 start, u32 count,
+				     struct list_head *list,
+				     enum dpaa_fq_type fq_type)
+{
+	struct dpaa_fq *dpaa_fq;
+	int i;
+
+	dpaa_fq = devm_kzalloc(dev, sizeof(*dpaa_fq) * count,
+			       GFP_KERNEL);
+	if (!dpaa_fq)
+		return NULL;
+
+	for (i = 0; i < count; i++) {
+		dpaa_fq[i].fq_type = fq_type;
+		dpaa_fq[i].fqid = start ? start + i : 0;
+		list_add_tail(&dpaa_fq[i].list, list);
+	}
+
+	for (i = 0; i < count; i++)
+		dpaa_assign_wq(dpaa_fq + i);
+
+	return dpaa_fq;
+}
+
+static int dpaa_alloc_all_fqs(struct device *dev, struct list_head *list,
+			      struct fm_port_fqs *port_fqs)
+{
+	struct dpaa_fq *dpaa_fq;
+
+	dpaa_fq = dpaa_fq_alloc(dev, 0, 1, list, FQ_TYPE_RX_ERROR);
+	if (!dpaa_fq)
+		goto fq_alloc_failed;
+
+	port_fqs->rx_errq = &dpaa_fq[0];
+
+	dpaa_fq = dpaa_fq_alloc(dev, 0, 1, list, FQ_TYPE_RX_DEFAULT);
+	if (!dpaa_fq)
+		goto fq_alloc_failed;
+
+	port_fqs->rx_defq = &dpaa_fq[0];
+
+	if (!dpaa_fq_alloc(dev, 0, DPAA_ETH_TXQ_NUM, list, FQ_TYPE_TX_CONF_MQ))
+		goto fq_alloc_failed;
+
+	dpaa_fq = dpaa_fq_alloc(dev, 0, 1, list, FQ_TYPE_TX_ERROR);
+	if (!dpaa_fq)
+		goto fq_alloc_failed;
+
+	port_fqs->tx_errq = &dpaa_fq[0];
+
+	dpaa_fq = dpaa_fq_alloc(dev, 0, 1, list, FQ_TYPE_TX_CONFIRM);
+	if (!dpaa_fq)
+		goto fq_alloc_failed;
+
+	port_fqs->tx_defq = &dpaa_fq[0];
+
+	if (!dpaa_fq_alloc(dev, 0, DPAA_ETH_TXQ_NUM, list, FQ_TYPE_TX))
+		goto fq_alloc_failed;
+
+	return 0;
+
+fq_alloc_failed:
+	dev_err(dev, "dpaa_fq_alloc() failed\n");
+	return -ENOMEM;
+}
+
+static u32 rx_pool_channel;
+static DEFINE_SPINLOCK(rx_pool_channel_init);
+
+static int dpaa_get_channel(void)
+{
+	spin_lock(&rx_pool_channel_init);
+	if (!rx_pool_channel) {
+		u32 pool;
+		int ret;
+
+		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;
+}
+
+static void dpaa_release_channel(void)
+{
+	qman_release_pool(rx_pool_channel);
+}
+
+static void dpaa_eth_add_channel(u16 channel)
+{
+	u32 pool = QM_SDQCR_CHANNELS_POOL_CONV(channel);
+	const cpumask_t *cpus = qman_affine_cpus();
+	struct qman_portal *portal;
+	int cpu;
+
+	for_each_cpu(cpu, cpus) {
+		portal = qman_get_affine_portal(cpu);
+		qman_p_static_dequeue_add(portal, pool);
+	}
+}
+
+/* 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 dpaa_priv *priv = (struct dpaa_priv *)container_of(cgr,
+		struct dpaa_priv, cgr_data.cgr);
+
+	if (congested)
+		netif_tx_stop_all_queues(priv->net_dev);
+	else
+		netif_tx_wake_all_queues(priv->net_dev);
+}
+
+static int dpaa_eth_cgr_init(struct dpaa_priv *priv)
+{
+	struct qm_mcc_initcgr initcgr;
+	u32 cs_th;
+	int err;
+
+	err = qman_alloc_cgrid(&priv->cgr_data.cgr.cgrid);
+	if (err < 0) {
+		if (netif_msg_drv(priv))
+			pr_err("%s: Error %d allocating CGR ID\n",
+			       __func__, 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) {
+		if (netif_msg_drv(priv))
+			pr_err("%s: Error %d creating CGR with ID %d\n",
+			       __func__, err, priv->cgr_data.cgr.cgrid);
+		qman_release_cgrid(priv->cgr_data.cgr.cgrid);
+		goto out_error;
+	}
+	if (netif_msg_drv(priv))
+		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 dpaa_setup_ingress(const struct dpaa_priv *priv,
+				      struct dpaa_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 dpaa_setup_egress(const struct dpaa_priv *priv,
+				     struct dpaa_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;
+	}
+}
+
+static void dpaa_fq_setup(struct dpaa_priv *priv,
+			  const struct dpaa_fq_cbs *fq_cbs,
+			  struct fman_port *tx_port)
+{
+	int egress_cnt = 0, conf_cnt = 0, num_portals = 0, cpu;
+	const cpumask_t *affine_cpus = qman_affine_cpus();
+	u16 portals[NR_CPUS];
+	struct dpaa_fq *fq;
+
+	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->dpaa_fq_list, list) {
+		switch (fq->fq_type) {
+		case FQ_TYPE_RX_DEFAULT:
+			dpaa_setup_ingress(priv, fq, &fq_cbs->rx_defq);
+			break;
+		case FQ_TYPE_RX_ERROR:
+			dpaa_setup_ingress(priv, fq, &fq_cbs->rx_errq);
+			break;
+		case FQ_TYPE_TX:
+			dpaa_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_TXQ_NUM)
+				priv->egress_fqs[egress_cnt++] = &fq->fq_base;
+			break;
+		case FQ_TYPE_TX_CONF_MQ:
+			priv->conf_fqs[conf_cnt++] = &fq->fq_base;
+			/* fall through */
+		case FQ_TYPE_TX_CONFIRM:
+			dpaa_setup_ingress(priv, fq, &fq_cbs->tx_defq);
+			break;
+		case FQ_TYPE_TX_ERROR:
+			dpaa_setup_ingress(priv, fq, &fq_cbs->tx_errq);
+			break;
+		default:
+			dev_warn(priv->net_dev->dev.parent,
+				 "Unknown FQ type detected!\n");
+			break;
+		}
+	}
+
+	 /* Make sure all CPUs receive a corresponding Tx queue. */
+	while (egress_cnt < DPAA_ETH_TXQ_NUM) {
+		list_for_each_entry(fq, &priv->dpaa_fq_list, list) {
+			if (fq->fq_type != FQ_TYPE_TX)
+				continue;
+			priv->egress_fqs[egress_cnt++] = &fq->fq_base;
+			if (egress_cnt == DPAA_ETH_TXQ_NUM)
+				break;
+		}
+	}
+}
+
+static inline int dpaa_tx_fq_to_id(const struct dpaa_priv *priv,
+				   struct qman_fq *tx_fq)
+{
+	int i;
+
+	for (i = 0; i < DPAA_ETH_TXQ_NUM; i++)
+		if (priv->egress_fqs[i] == tx_fq)
+			return i;
+
+	return -EINVAL;
+}
+
+static int dpaa_fq_init(struct dpaa_fq *dpaa_fq, bool td_enable)
+{
+	const struct dpaa_priv	*priv;
+	struct qman_fq *confq = NULL;
+	struct qm_mcc_initfq initfq;
+	struct device *dev;
+	struct qman_fq *fq;
+	int queue_id;
+	int err;
+
+	priv = netdev_priv(dpaa_fq->net_dev);
+	dev = dpaa_fq->net_dev->dev.parent;
+
+	if (dpaa_fq->fqid == 0)
+		dpaa_fq->flags |= QMAN_FQ_FLAG_DYNAMIC_FQID;
+
+	dpaa_fq->init = !(dpaa_fq->flags & QMAN_FQ_FLAG_NO_MODIFY);
+
+	err = qman_create_fq(dpaa_fq->fqid, dpaa_fq->flags, &dpaa_fq->fq_base);
+	if (err) {
+		dev_err(dev, "qman_create_fq() failed\n");
+		return err;
+	}
+	fq = &dpaa_fq->fq_base;
+
+	if (dpaa_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 (dpaa_fq->fq_type == FQ_TYPE_TX_CONFIRM)
+			initfq.fqd.fq_ctrl |= QM_FQCTRL_HOLDACTIVE;
+
+		/* FQ placement */
+		initfq.we_mask |= QM_INITFQ_WE_DESTWQ;
+
+		qm_fqd_set_destwq(&initfq.fqd, dpaa_fq->channel, dpaa_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 (dpaa_fq->fq_type == FQ_TYPE_TX ||
+		    dpaa_fq->fq_type == FQ_TYPE_TX_CONFIRM ||
+		    dpaa_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;
+			qm_fqd_set_oac(&initfq.fqd, QM_OAC_CG);
+			qm_fqd_set_oal(&initfq.fqd,
+				       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_set_taildrop(&initfq.fqd, DPAA_FQ_TD, 1);
+			initfq.fqd.fq_ctrl = QM_FQCTRL_TDE;
+		}
+
+		if (dpaa_fq->fq_type == FQ_TYPE_TX) {
+			queue_id = dpaa_tx_fq_to_id(priv, &dpaa_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 the ingress queues in our "ingress CGR". */
+		if (priv->use_ingress_cgr &&
+		    (dpaa_fq->fq_type == FQ_TYPE_RX_DEFAULT ||
+		     dpaa_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;
+			qm_fqd_set_oac(&initfq.fqd, QM_OAC_CG);
+			qm_fqd_set_oal(&initfq.fqd,
+				       min(sizeof(struct sk_buff) +
+				       priv->tx_headroom,
+				       (size_t)FSL_QMAN_MAX_OAL));
+		}
+
+		/* Initialization common to all ingress queues */
+		if (dpaa_fq->flags & QMAN_FQ_FLAG_NO_ENQUEUE) {
+			initfq.we_mask |= QM_INITFQ_WE_CONTEXTA;
+			initfq.fqd.fq_ctrl |=
+				QM_FQCTRL_HOLDACTIVE;
+			initfq.fqd.context_a.stashing.exclusive =
+				QM_STASHING_EXCL_DATA | QM_STASHING_EXCL_CTX |
+				QM_STASHING_EXCL_ANNOTATION;
+			qm_fqd_set_stashing(&initfq.fqd, 1, 2,
+					    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);
+			return err;
+		}
+	}
+
+	dpaa_fq->fqid = qman_fq_fqid(fq);
+
+	return 0;
+}
+
+static int dpaa_fq_free_entry(struct device *dev, struct qman_fq *fq)
+{
+	const struct dpaa_priv  *priv;
+	struct dpaa_fq *dpaa_fq;
+	int err, error;
+
+	err = 0;
+
+	dpaa_fq = container_of(fq, struct dpaa_fq, fq_base);
+	priv = netdev_priv(dpaa_fq->net_dev);
+
+	if (dpaa_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);
+	list_del(&dpaa_fq->list);
+
+	return err;
+}
+
+static int dpaa_fq_free(struct device *dev, struct list_head *list)
+{
+	struct dpaa_fq *dpaa_fq, *tmp;
+	int err, error;
+
+	err = 0;
+	list_for_each_entry_safe(dpaa_fq, tmp, list, list) {
+		error = dpaa_fq_free_entry(dev, (struct qman_fq *)dpaa_fq);
+		if (error < 0 && err >= 0)
+			err = error;
+	}
+
+	return err;
+}
+
+static void dpaa_eth_init_tx_port(struct fman_port *port, struct dpaa_fq *errq,
+				  struct dpaa_fq *defq,
+				  struct dpaa_buffer_layout *buf_layout)
+{
+	struct fman_buffer_prefix_content buf_prefix_content;
+	struct fman_port_params params;
+	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 = true;
+	buf_prefix_content.pass_hash_result = true;
+	buf_prefix_content.pass_time_stamp = false;
+	buf_prefix_content.data_align = DPAA_FD_DATA_ALIGNMENT;
+
+	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_err("%s: fman_port_config failed\n", __func__);
+
+	err = fman_port_cfg_buf_prefix_content(port, &buf_prefix_content);
+	if (err)
+		pr_err("%s: fman_port_cfg_buf_prefix_content failed\n",
+		       __func__);
+
+	err = fman_port_init(port);
+	if (err)
+		pr_err("%s: fm_port_init failed\n", __func__);
+}
+
+static void dpaa_eth_init_rx_port(struct fman_port *port, struct dpaa_bp **bps,
+				  size_t count, struct dpaa_fq *errq,
+				  struct dpaa_fq *defq,
+				  struct dpaa_buffer_layout *buf_layout)
+{
+	struct fman_buffer_prefix_content buf_prefix_content;
+	struct fman_port_rx_params *rx_p;
+	struct fman_port_params params;
+	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 = true;
+	buf_prefix_content.pass_hash_result = true;
+	buf_prefix_content.pass_time_stamp = false;
+	buf_prefix_content.data_align = DPAA_FD_DATA_ALIGNMENT;
+
+	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 =  bps[i]->bpid;
+		rx_p->ext_buf_pools.ext_buf_pool[i].size = (u16)bps[i]->size;
+	}
+
+	err = fman_port_config(port, &params);
+	if (err)
+		pr_err("%s: fman_port_config failed\n", __func__);
+
+	err = fman_port_cfg_buf_prefix_content(port, &buf_prefix_content);
+	if (err)
+		pr_err("%s: fman_port_cfg_buf_prefix_content failed\n",
+		       __func__);
+
+	err = fman_port_init(port);
+	if (err)
+		pr_err("%s: fm_port_init failed\n", __func__);
+}
+
+static void dpaa_eth_init_ports(struct mac_device *mac_dev,
+				struct dpaa_bp **bps, size_t count,
+				struct fm_port_fqs *port_fqs,
+				struct dpaa_buffer_layout *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, bps, count, port_fqs->rx_errq,
+			      port_fqs->rx_defq, &buf_layout[RX]);
+}
+
+static int dpaa_bman_release(const struct dpaa_bp *dpaa_bp,
+			     struct bm_buffer *bmb, int cnt)
+{
+	int err;
+
+	err = bman_release(dpaa_bp->pool, bmb, cnt);
+	/* Should never occur, address anyway to avoid leaking the buffers */
+	if (unlikely(WARN_ON(err)) && dpaa_bp->free_buf_cb)
+		while (cnt-- > 0)
+			dpaa_bp->free_buf_cb(dpaa_bp, &bmb[cnt]);
+
+	return cnt;
+}
+
+static void dpaa_release_sgt_members(struct qm_sg_entry *sgt)
+{
+	struct bm_buffer bmb[DPAA_BUFF_RELEASE_MAX];
+	struct dpaa_bp *dpaa_bp;
+	int i = 0, j;
+
+	memset(bmb, 0, sizeof(bmb));
+
+	do {
+		dpaa_bp = dpaa_bpid2pool(sgt[i].bpid);
+		if (!dpaa_bp)
+			return;
+
+		j = 0;
+		do {
+			WARN_ON(qm_sg_entry_is_ext(&sgt[i]));
+
+			bm_buffer_set64(&bmb[j], qm_sg_entry_get64(&sgt[i]));
+
+			j++; i++;
+		} while (j < ARRAY_SIZE(bmb) &&
+				!qm_sg_entry_is_final(&sgt[i - 1]) &&
+				sgt[i - 1].bpid == sgt[i].bpid);
+
+		dpaa_bman_release(dpaa_bp, bmb, j);
+	} while (!qm_sg_entry_is_final(&sgt[i - 1]));
+}
+
+static void dpaa_fd_release(const struct net_device *net_dev,
+			    const struct qm_fd *fd)
+{
+	struct qm_sg_entry *sgt;
+	struct dpaa_bp *dpaa_bp;
+	struct bm_buffer bmb;
+	dma_addr_t addr;
+	void *vaddr;
+
+	bmb.data = 0;
+	bm_buffer_set64(&bmb, qm_fd_addr(fd));
+
+	dpaa_bp = dpaa_bpid2pool(fd->bpid);
+	if (!dpaa_bp)
+		return;
+
+	if (qm_fd_get_format(fd) == qm_fd_sg) {
+		vaddr = phys_to_virt(qm_fd_addr(fd));
+		sgt = vaddr + qm_fd_get_offset(fd);
+
+		dma_unmap_single(dpaa_bp->dev, qm_fd_addr(fd), dpaa_bp->size,
+				 DMA_FROM_DEVICE);
+
+		dpaa_release_sgt_members(sgt);
+
+		addr = dma_map_single(dpaa_bp->dev, vaddr, dpaa_bp->size,
+				      DMA_FROM_DEVICE);
+		if (dma_mapping_error(dpaa_bp->dev, addr)) {
+			dev_err(dpaa_bp->dev, "DMA mapping failed");
+			return;
+		}
+		bm_buffer_set64(&bmb, addr);
+	}
+
+	dpaa_bman_release(dpaa_bp, &bmb, 1);
+}
+
+/* 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).
+ */
+static int dpaa_enable_tx_csum(struct dpaa_priv *priv,
+			       struct sk_buff *skb,
+			       struct qm_fd *fd,
+			       char *parse_results)
+{
+	struct fman_prs_result *parse_result;
+	u16 ethertype = ntohs(skb->protocol);
+	struct ipv6hdr *ipv6h = NULL;
+	struct iphdr *iph;
+	int retval = 0;
+	u8 l4_proto;
+
+	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);
+		WARN_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);
+		WARN_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:
+		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;
+}
+
+static int dpaa_bp_add_8_bufs(const struct dpaa_bp *dpaa_bp)
+{
+	struct device *dev = dpaa_bp->dev;
+	struct bm_buffer bmb[8];
+	dma_addr_t addr;
+	void *new_buf;
+	u8 i;
+
+	for (i = 0; i < 8; i++) {
+		new_buf = netdev_alloc_frag(dpaa_bp->raw_size);
+		if (unlikely(!new_buf)) {
+			dev_err(dev, "netdev_alloc_frag() failed, size %zu\n",
+				dpaa_bp->raw_size);
+			goto release_previous_buffs;
+		}
+		new_buf = PTR_ALIGN(new_buf, SMP_CACHE_BYTES);
+
+		addr = dma_map_single(dev, new_buf,
+				      dpaa_bp->size, DMA_FROM_DEVICE);
+		if (unlikely(dma_mapping_error(dev, addr))) {
+			dev_err(dpaa_bp->dev, "DMA map failed");
+			goto release_previous_buffs;
+		}
+
+		bmb[i].data = 0;
+		bm_buffer_set64(&bmb[i], addr);
+	}
+
+release_bufs:
+	return dpaa_bman_release(dpaa_bp, bmb, i);
+
+release_previous_buffs:
+	WARN_ONCE(1, "dpaa_eth: failed to add buffers 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;
+}
+
+static int dpaa_bp_seed(struct dpaa_bp *dpaa_bp)
+{
+	int i;
+
+	/* Give each CPU an allotment of "config_count" buffers */
+	for_each_possible_cpu(i) {
+		int *count_ptr = per_cpu_ptr(dpaa_bp->percpu_count, 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 < dpaa_bp->config_count; j += 8)
+			*count_ptr += dpaa_bp_add_8_bufs(dpaa_bp);
+	}
+	return 0;
+}
+
+/* Add buffers/(pages) for Rx processing whenever bpool count falls below
+ * REFILL_THRESHOLD.
+ */
+static int dpaa_eth_refill_bpool(struct dpaa_bp *dpaa_bp, int *countptr)
+{
+	int count = *countptr;
+	int new_bufs;
+
+	if (unlikely(count < FSL_DPAA_ETH_REFILL_THRESHOLD)) {
+		do {
+			new_bufs = dpaa_bp_add_8_bufs(dpaa_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;
+}
+
+static int dpaa_eth_refill_bpools(struct dpaa_priv *priv)
+{
+	struct dpaa_bp *dpaa_bp;
+	int *countptr;
+	int res, i;
+
+	for (i = 0; i < DPAA_BPS_NUM; i++) {
+		dpaa_bp = priv->dpaa_bps[i];
+		if (!dpaa_bp)
+			return -EINVAL;
+		countptr = this_cpu_ptr(dpaa_bp->percpu_count);
+		res  = dpaa_eth_refill_bpool(dpaa_bp, countptr);
+		if (res)
+			return res;
+	}
+	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.
+ */
+static struct sk_buff *dpaa_cleanup_tx_fd(const struct dpaa_priv *priv,
+					  const struct qm_fd *fd)
+{
+	const enum dma_data_direction dma_dir = DMA_TO_DEVICE;
+	struct device *dev = priv->net_dev->dev.parent;
+	dma_addr_t addr = qm_fd_addr(fd);
+	const struct qm_sg_entry *sgt;
+	struct sk_buff **skbh, *skb;
+	int nr_frags, i;
+
+	skbh = (struct sk_buff **)phys_to_virt(addr);
+	skb = *skbh;
+
+	if (unlikely(qm_fd_get_format(fd) == qm_fd_sg)) {
+		nr_frags = skb_shinfo(skb)->nr_frags;
+		dma_unmap_single(dev, addr, qm_fd_get_offset(fd) +
+				 sizeof(struct qm_sg_entry) * (1 + nr_frags),
+				 dma_dir);
+
+		/* The sgt buffer has been allocated with netdev_alloc_frag(),
+		 * it's from lowmem.
+		 */
+		sgt = phys_to_virt(addr + qm_fd_get_offset(fd));
+
+		/* sgt[0] is from lowmem, was dma_map_single()-ed */
+		dma_unmap_single(dev, qm_sg_addr(&sgt[0]),
+				 qm_sg_entry_get_len(&sgt[0]), dma_dir);
+
+		/* remaining pages were mapped with skb_frag_dma_map() */
+		for (i = 1; i < nr_frags; i++) {
+			WARN_ON(qm_sg_entry_is_ext(&sgt[i]));
+
+			dma_unmap_page(dev, qm_sg_addr(&sgt[i]),
+				       qm_sg_entry_get_len(&sgt[i]), dma_dir);
+		}
+
+		/* Free the page frag that we allocated on Tx */
+		skb_free_frag(phys_to_virt(addr));
+	} else {
+		dma_unmap_single(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 dpaa_priv *priv,
+					const struct qm_fd *fd)
+{
+	ssize_t fd_off = qm_fd_get_offset(fd);
+	dma_addr_t addr = qm_fd_addr(fd);
+	struct dpaa_bp *dpaa_bp;
+	struct sk_buff *skb;
+	void *vaddr;
+
+	vaddr = phys_to_virt(addr);
+	WARN_ON(!IS_ALIGNED((unsigned long)vaddr, SMP_CACHE_BYTES));
+
+	dpaa_bp = dpaa_bpid2pool(fd->bpid);
+	if (!dpaa_bp)
+		goto free_buffer;
+
+	skb = build_skb(vaddr, dpaa_bp->size +
+			SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
+	if (unlikely(!skb)) {
+		WARN_ONCE(1, "Build skb failure on Rx\n");
+		goto free_buffer;
+	}
+	WARN_ON(fd_off != priv->rx_headroom);
+	skb_reserve(skb, fd_off);
+	skb_put(skb, qm_fd_get_length(fd));
+
+	skb->ip_summed = CHECKSUM_NONE;
+
+	return skb;
+
+free_buffer:
+	skb_free_frag(vaddr);
+	return NULL;
+}
+
+/* Build an skb with the data of the first S/G entry in the linear portion and
+ * the rest of the frame as skb fragments.
+ *
+ * The page fragment holding the S/G Table is recycled here.
+ */
+static struct sk_buff *sg_fd_to_skb(const struct dpaa_priv *priv,
+				    const struct qm_fd *fd)
+{
+	ssize_t fd_off = qm_fd_get_offset(fd);
+	dma_addr_t addr = qm_fd_addr(fd);
+	const struct qm_sg_entry *sgt;
+	struct page *page, *head_page;
+	struct dpaa_bp *dpaa_bp;
+	void *vaddr, *sg_vaddr;
+	int frag_off, frag_len;
+	struct sk_buff *skb;
+	dma_addr_t sg_addr;
+	int page_offset;
+	unsigned int sz;
+	int *count_ptr;
+	int i;
+
+	vaddr = phys_to_virt(addr);
+	WARN_ON(!IS_ALIGNED((unsigned long)vaddr, SMP_CACHE_BYTES));
+
+	/* Iterate through the SGT entries and add data buffers to the skb */
+	sgt = vaddr + fd_off;
+	for (i = 0; i < DPAA_SGT_MAX_ENTRIES; i++) {
+		/* Extension bit is not supported */
+		WARN_ON(qm_sg_entry_is_ext(&sgt[i]));
+
+		sg_addr = qm_sg_addr(&sgt[i]);
+		sg_vaddr = phys_to_virt(sg_addr);
+		WARN_ON(!IS_ALIGNED((unsigned long)sg_vaddr,
+				    SMP_CACHE_BYTES));
+
+		/* We may use multiple Rx pools */
+		dpaa_bp = dpaa_bpid2pool(sgt[i].bpid);
+		if (!dpaa_bp)
+			goto free_buffers;
+
+		count_ptr = this_cpu_ptr(dpaa_bp->percpu_count);
+		dma_unmap_single(dpaa_bp->dev, sg_addr, dpaa_bp->size,
+				 DMA_FROM_DEVICE);
+		if (i == 0) {
+			sz = dpaa_bp->size +
+				SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+			skb = build_skb(sg_vaddr, sz);
+			if (WARN_ON(unlikely(!skb)))
+				goto free_buffers;
+
+			skb->ip_summed = CHECKSUM_NONE;
+
+			/* Make sure forwarded skbs will have enough space
+			 * on Tx, if extra headers are added.
+			 */
+			WARN_ON(fd_off != priv->rx_headroom);
+			skb_reserve(skb, fd_off);
+			skb_put(skb, qm_sg_entry_get_len(&sgt[i]));
+		} else {
+			/* Not the first S/G entry; all data from buffer will
+			 * be added in an skb fragment; fragment index is offset
+			 * by one since first S/G entry was incorporated in the
+			 * linear part of the skb.
+			 *
+			 * Caution: 'page' may be a tail page.
+			 */
+			page = virt_to_page(sg_vaddr);
+			head_page = virt_to_head_page(sg_vaddr);
+
+			/* Compute offset in (possibly tail) page */
+			page_offset = ((unsigned long)sg_vaddr &
+					(PAGE_SIZE - 1)) +
+				(page_address(page) - page_address(head_page));
+			/* page_offset only refers to the beginning of sgt[i];
+			 * but the buffer itself may have an internal offset.
+			 */
+			frag_off = qm_sg_entry_get_off(&sgt[i]) + page_offset;
+			frag_len = qm_sg_entry_get_len(&sgt[i]);
+			/* skb_add_rx_frag() does no checking on the page; if
+			 * we pass it a tail page, we'll end up with
+			 * bad page accounting and eventually with segafults.
+			 */
+			skb_add_rx_frag(skb, i - 1, head_page, frag_off,
+					frag_len, dpaa_bp->size);
+		}
+		/* Update the pool count for the current {cpu x bpool} */
+		(*count_ptr)--;
+
+		if (qm_sg_entry_is_final(&sgt[i]))
+			break;
+	}
+	WARN_ONCE(i == DPAA_SGT_MAX_ENTRIES, "No final bit on SGT\n");
+
+	/* free the SG table buffer */
+	skb_free_frag(vaddr);
+
+	return skb;
+
+free_buffers:
+	/* compensate sw bpool counter changes */
+	for (i--; i > 0; i--) {
+		dpaa_bp = dpaa_bpid2pool(sgt[i].bpid);
+		if (dpaa_bp) {
+			count_ptr = this_cpu_ptr(dpaa_bp->percpu_count);
+			(*count_ptr)++;
+		}
+	}
+	/* free all the SG entries */
+	for (i = 0; i < DPAA_SGT_MAX_ENTRIES ; i++) {
+		sg_addr = qm_sg_addr(&sgt[i]);
+		sg_vaddr = phys_to_virt(sg_addr);
+		skb_free_frag(sg_vaddr);
+		dpaa_bp = dpaa_bpid2pool(sgt[i].bpid);
+		if (dpaa_bp) {
+			count_ptr = this_cpu_ptr(dpaa_bp->percpu_count);
+			(*count_ptr)--;
+		}
+
+		if (qm_sg_entry_is_final(&sgt[i]))
+			break;
+	}
+	/* free the SGT fragment */
+	skb_free_frag(vaddr);
+
+	return NULL;
+}
+
+static int skb_to_contig_fd(struct dpaa_priv *priv,
+			    struct sk_buff *skb, struct qm_fd *fd,
+			    int *offset)
+{
+	struct net_device *net_dev = priv->net_dev;
+	struct device *dev = net_dev->dev.parent;
+	enum dma_data_direction dma_dir;
+	unsigned char *buffer_start;
+	struct sk_buff **skbh;
+	dma_addr_t addr;
+	int err;
+
+	/* We are guaranteed to have at least tx_headroom bytes
+	 * available, so just use that for offset.
+	 */
+	fd->bpid = FSL_DPAA_BPID_INV;
+	buffer_start = skb->data - priv->tx_headroom;
+	dma_dir = DMA_TO_DEVICE;
+
+	skbh = (struct sk_buff **)buffer_start;
+	*skbh = skb;
+
+	/* 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 = dpaa_enable_tx_csum(priv, skb, fd,
+				  ((char *)skbh) + DPAA_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 */
+	qm_fd_set_contig(fd, priv->tx_headroom, 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(dev, skbh,
+			      skb_tail_pointer(skb) - buffer_start, dma_dir);
+	if (unlikely(dma_mapping_error(dev, addr))) {
+		if (net_ratelimit())
+			netif_err(priv, tx_err, net_dev, "dma_map_single() failed\n");
+		return -EINVAL;
+	}
+	qm_fd_addr_set64(fd, addr);
+
+	return 0;
+}
+
+static int skb_to_sg_fd(struct dpaa_priv *priv,
+			struct sk_buff *skb, struct qm_fd *fd)
+{
+	const enum dma_data_direction dma_dir = DMA_TO_DEVICE;
+	const int nr_frags = skb_shinfo(skb)->nr_frags;
+	struct net_device *net_dev = priv->net_dev;
+	struct device *dev = net_dev->dev.parent;
+	struct qm_sg_entry *sgt;
+	struct sk_buff **skbh;
+	int i, j, err, sz;
+	void *buffer_start;
+	skb_frag_t *frag;
+	dma_addr_t addr;
+	size_t frag_len;
+	void *sgt_buf;
+
+	/* get a page frag to store the SGTable */
+	sz = SKB_DATA_ALIGN(priv->tx_headroom +
+		sizeof(struct qm_sg_entry) * (1 + nr_frags));
+	sgt_buf = netdev_alloc_frag(sz);
+	if (unlikely(!sgt_buf)) {
+		netdev_err(net_dev, "netdev_alloc_frag() failed for size %d\n",
+			   sz);
+		return -ENOMEM;
+	}
+
+	/* 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 = dpaa_enable_tx_csum(priv, skb, fd,
+				  sgt_buf + DPAA_TX_PRIV_DATA_SIZE);
+	if (unlikely(err < 0)) {
+		if (net_ratelimit())
+			netif_err(priv, tx_err, net_dev, "HW csum error: %d\n",
+				  err);
+		goto csum_failed;
+	}
+
+	sgt = (struct qm_sg_entry *)(sgt_buf + priv->tx_headroom);
+	qm_sg_entry_set_len(&sgt[0], skb_headlen(skb));
+	sgt[0].bpid = FSL_DPAA_BPID_INV;
+	sgt[0].offset = 0;
+	addr = dma_map_single(dev, skb->data,
+			      skb_headlen(skb), dma_dir);
+	if (unlikely(dma_mapping_error(dev, addr))) {
+		dev_err(dev, "DMA mapping failed");
+		err = -EINVAL;
+		goto sg0_map_failed;
+	}
+	qm_sg_entry_set64(&sgt[0], addr);
+
+	/* populate the rest of SGT entries */
+	frag = &skb_shinfo(skb)->frags[0];
+	frag_len = frag->size;
+	for (i = 1; i <= nr_frags; i++, frag++) {
+		WARN_ON(!skb_frag_page(frag));
+		addr = skb_frag_dma_map(dev, frag, 0,
+					frag_len, dma_dir);
+		if (unlikely(dma_mapping_error(dev, addr))) {
+			dev_err(dev, "DMA mapping failed");
+			err = -EINVAL;
+			goto sg_map_failed;
+		}
+
+		qm_sg_entry_set_len(&sgt[i], frag_len);
+		sgt[i].bpid = FSL_DPAA_BPID_INV;
+		sgt[i].offset = 0;
+
+		/* keep the offset in the address */
+		qm_sg_entry_set64(&sgt[i], addr);
+		frag_len = frag->size;
+	}
+	qm_sg_entry_set_f(&sgt[i - 1], frag_len);
+
+	qm_fd_set_sg(fd, priv->tx_headroom, skb->len);
+
+	/* DMA map the SGT page */
+	buffer_start = (void *)sgt - priv->tx_headroom;
+	skbh = (struct sk_buff **)buffer_start;
+	*skbh = skb;
+
+	addr = dma_map_single(dev, buffer_start, priv->tx_headroom +
+			      sizeof(struct qm_sg_entry) * (1 + nr_frags),
+			      dma_dir);
+	if (unlikely(dma_mapping_error(dev, addr))) {
+		dev_err(dev, "DMA mapping failed");
+		err = -EINVAL;
+		goto sgt_map_failed;
+	}
+
+	fd->bpid = FSL_DPAA_BPID_INV;
+	fd->cmd |= FM_FD_CMD_FCO;
+	qm_fd_addr_set64(fd, addr);
+
+	return 0;
+
+sgt_map_failed:
+sg_map_failed:
+	for (j = 0; j < i; j++)
+		dma_unmap_page(dev, qm_sg_addr(&sgt[j]),
+			       qm_sg_entry_get_len(&sgt[j]), dma_dir);
+sg0_map_failed:
+csum_failed:
+	skb_free_frag(sgt_buf);
+
+	return err;
+}
+
+static inline int dpaa_xmit(struct dpaa_priv *priv,
+			    struct rtnl_link_stats64 *percpu_stats,
+			    int queue,
+			    struct qm_fd *fd)
+{
+	struct qman_fq *egress_fq;
+	int err, i;
+
+	egress_fq = priv->egress_fqs[queue];
+	if (fd->bpid == FSL_DPAA_BPID_INV)
+		fd->cmd |= qman_fq_fqid(priv->conf_fqs[queue]);
+
+	for (i = 0; i < DPAA_ENQUEUE_RETRIES; i++) {
+		err = qman_enqueue(egress_fq, fd);
+		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 += qm_fd_get_length(fd);
+
+	return 0;
+}
+
+static int dpaa_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
+{
+	const int queue_mapping = skb_get_queue_mapping(skb);
+	bool nonlinear = skb_is_nonlinear(skb);
+	struct rtnl_link_stats64 *percpu_stats;
+	struct dpaa_percpu_priv *percpu_priv;
+	struct dpaa_priv *priv;
+	struct qm_fd fd;
+	int offset = 0;
+	int err = 0;
+
+	priv = netdev_priv(net_dev);
+	percpu_priv = this_cpu_ptr(priv->percpu_priv);
+	percpu_stats = &percpu_priv->stats;
+
+	qm_fd_clear_fd(&fd);
+
+	if (!nonlinear) {
+		/* 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;
+
+		WARN_ON(skb_is_nonlinear(skb));
+	}
+
+	/* MAX_SKB_FRAGS is equal or larger than our dpaa_SGT_MAX_ENTRIES;
+	 * make sure we don't feed FMan with more fragments than it supports.
+	 */
+	if (nonlinear &&
+	    likely(skb_shinfo(skb)->nr_frags < DPAA_SGT_MAX_ENTRIES)) {
+		/* Just create a S/G fd based on the skb */
+		err = skb_to_sg_fd(priv, skb, &fd);
+	} else {
+		/* If the egress skb contains more fragments than we support
+		 * we have no choice but to linearize it ourselves.
+		 */
+		if (unlikely(nonlinear) && __skb_linearize(skb))
+			goto enomem;
+
+		/* Finally, create a contig FD from this skb */
+		err = skb_to_contig_fd(priv, skb, &fd, &offset);
+	}
+	if (unlikely(err < 0))
+		goto skb_to_fd_failed;
+
+	if (likely(dpaa_xmit(priv, percpu_stats, queue_mapping, &fd) == 0))
+		return NETDEV_TX_OK;
+
+	dpaa_cleanup_tx_fd(priv, &fd);
+skb_to_fd_failed:
+enomem:
+	percpu_stats->tx_errors++;
+	dev_kfree_skb(skb);
+	return NETDEV_TX_OK;
+}
+
+static void dpaa_rx_error(struct net_device *net_dev,
+			  const struct dpaa_priv *priv,
+			  struct dpaa_percpu_priv *percpu_priv,
+			  const struct qm_fd *fd,
+			  u32 fqid)
+{
+	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++;
+
+	dpaa_fd_release(net_dev, fd);
+}
+
+static void dpaa_tx_error(struct net_device *net_dev,
+			  const struct dpaa_priv *priv,
+			  struct dpaa_percpu_priv *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++;
+
+	skb = dpaa_cleanup_tx_fd(priv, fd);
+	dev_kfree_skb(skb);
+}
+
+static int dpaa_eth_poll(struct napi_struct *napi, int budget)
+{
+	struct dpaa_napi_portal *np =
+			container_of(napi, struct dpaa_napi_portal, napi);
+
+	int cleaned = qman_p_poll_dqrr(np->p, budget);
+
+	if (cleaned < budget) {
+		napi_complete(napi);
+		qman_p_irqsource_add(np->p, QM_PIRQ_DQRI);
+
+	} else if (np->down) {
+		qman_p_irqsource_add(np->p, QM_PIRQ_DQRI);
+	}
+
+	return cleaned;
+}
+
+static void dpaa_tx_conf(struct net_device *net_dev,
+			 const struct dpaa_priv *priv,
+			 struct dpaa_percpu_priv *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 = dpaa_cleanup_tx_fd(priv, fd);
+
+	consume_skb(skb);
+}
+
+static inline int dpaa_eth_napi_schedule(struct dpaa_percpu_priv *percpu_priv,
+					 struct qman_portal *portal)
+{
+	if (unlikely(in_irq() || !in_serving_softirq())) {
+		/* Disable QMan IRQ and invoke NAPI */
+		qman_p_irqsource_remove(portal, QM_PIRQ_DQRI);
+
+		percpu_priv->np.p = portal;
+		napi_schedule(&percpu_priv->np.napi);
+		return 1;
+	}
+	return 0;
+}
+
+static enum qman_cb_dqrr_result rx_error_dqrr(struct qman_portal *portal,
+					      struct qman_fq *fq,
+					      const struct qm_dqrr_entry *dq)
+{
+	struct dpaa_fq *dpaa_fq = container_of(fq, struct dpaa_fq, fq_base);
+	struct dpaa_percpu_priv *percpu_priv;
+	struct net_device *net_dev;
+	struct dpaa_bp *dpaa_bp;
+	struct dpaa_priv *priv;
+
+	net_dev = dpaa_fq->net_dev;
+	priv = netdev_priv(net_dev);
+	dpaa_bp = dpaa_bpid2pool(dq->fd.bpid);
+	if (!dpaa_bp)
+		return qman_cb_dqrr_consume;
+
+	percpu_priv = this_cpu_ptr(priv->percpu_priv);
+
+	if (dpaa_eth_napi_schedule(percpu_priv, portal))
+		return qman_cb_dqrr_stop;
+
+	if (dpaa_eth_refill_bpools(priv))
+		/* 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.
+		 */
+		dpaa_fd_release(net_dev, &dq->fd);
+	else
+		dpaa_rx_error(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
+
+	return qman_cb_dqrr_consume;
+}
+
+static enum qman_cb_dqrr_result rx_default_dqrr(struct qman_portal *portal,
+						struct qman_fq *fq,
+						const struct qm_dqrr_entry *dq)
+{
+	struct rtnl_link_stats64 *percpu_stats;
+	struct dpaa_percpu_priv *percpu_priv;
+	const struct qm_fd *fd = &dq->fd;
+	dma_addr_t addr = qm_fd_addr(fd);
+	enum qm_fd_format fd_format;
+	struct net_device *net_dev;
+	u32 fd_status = fd->status;
+	struct dpaa_bp *dpaa_bp;
+	struct dpaa_priv *priv;
+	unsigned int skb_len;
+	struct sk_buff *skb;
+	int *count_ptr;
+
+	net_dev = ((struct dpaa_fq *)fq)->net_dev;
+	priv = netdev_priv(net_dev);
+	dpaa_bp = dpaa_bpid2pool(dq->fd.bpid);
+	if (!dpaa_bp)
+		return qman_cb_dqrr_consume;
+
+	percpu_priv = this_cpu_ptr(priv->percpu_priv);
+	percpu_stats = &percpu_priv->stats;
+
+	if (unlikely(dpaa_eth_napi_schedule(percpu_priv, portal)))
+		return qman_cb_dqrr_stop;
+
+	/* Make sure we didn't run out of buffers */
+	if (unlikely(dpaa_eth_refill_bpools(priv))) {
+		/* 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.
+		 */
+		dpaa_fd_release(net_dev, &dq->fd);
+		return qman_cb_dqrr_consume;
+	}
+
+	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++;
+		dpaa_fd_release(net_dev, fd);
+		return qman_cb_dqrr_consume;
+	}
+
+	dpaa_bp = dpaa_bpid2pool(fd->bpid);
+	if (!dpaa_bp)
+		return qman_cb_dqrr_consume;
+
+	dma_unmap_single(dpaa_bp->dev, addr, dpaa_bp->size, DMA_FROM_DEVICE);
+
+	/* prefetch the first 64 bytes of the frame or the SGT start */
+	prefetch(phys_to_virt(addr) + qm_fd_get_offset(fd));
+
+	fd_format = qm_fd_get_format(fd);
+	/* The only FD types that we may receive are contig and S/G */
+	WARN_ON((fd_format != qm_fd_contig) && (fd_format != qm_fd_sg));
+
+	/* Account for either the contig buffer or the SGT buffer (depending on
+	 * which case we were in) having been removed from the pool.
+	 */
+	count_ptr = this_cpu_ptr(dpaa_bp->percpu_count);
+	(*count_ptr)--;
+
+	if (likely(fd_format == qm_fd_contig))
+		skb = contig_fd_to_skb(priv, fd);
+	else
+		skb = sg_fd_to_skb(priv, fd);
+	if (!skb)
+		return qman_cb_dqrr_consume;
+
+	skb->protocol = eth_type_trans(skb, net_dev);
+
+	skb_len = skb->len;
+
+	if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
+		return qman_cb_dqrr_consume;
+
+	percpu_stats->rx_packets++;
+	percpu_stats->rx_bytes += skb_len;
+
+	return qman_cb_dqrr_consume;
+}
+
+static enum qman_cb_dqrr_result conf_error_dqrr(struct qman_portal *portal,
+						struct qman_fq *fq,
+						const struct qm_dqrr_entry *dq)
+{
+	struct dpaa_percpu_priv *percpu_priv;
+	struct net_device *net_dev;
+	struct dpaa_priv *priv;
+
+	net_dev = ((struct dpaa_fq *)fq)->net_dev;
+	priv = netdev_priv(net_dev);
+
+	percpu_priv = this_cpu_ptr(priv->percpu_priv);
+
+	if (dpaa_eth_napi_schedule(percpu_priv, portal))
+		return qman_cb_dqrr_stop;
+
+	dpaa_tx_error(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
+
+	return qman_cb_dqrr_consume;
+}
+
+static enum qman_cb_dqrr_result conf_dflt_dqrr(struct qman_portal *portal,
+					       struct qman_fq *fq,
+					       const struct qm_dqrr_entry *dq)
+{
+	struct dpaa_percpu_priv *percpu_priv;
+	struct net_device *net_dev;
+	struct dpaa_priv *priv;
+
+	net_dev = ((struct dpaa_fq *)fq)->net_dev;
+	priv = netdev_priv(net_dev);
+
+	percpu_priv = this_cpu_ptr(priv->percpu_priv);
+
+	if (dpaa_eth_napi_schedule(percpu_priv, portal))
+		return qman_cb_dqrr_stop;
+
+	dpaa_tx_conf(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
+
+	return qman_cb_dqrr_consume;
+}
+
+static void egress_ern(struct qman_portal *portal,
+		       struct qman_fq *fq,
+		       const union qm_mr_entry *msg)
+{
+	const struct qm_fd *fd = &msg->ern.fd;
+	struct dpaa_percpu_priv *percpu_priv;
+	const struct dpaa_priv *priv;
+	struct net_device *net_dev;
+	struct sk_buff *skb;
+
+	net_dev = ((struct dpaa_fq *)fq)->net_dev;
+	priv = netdev_priv(net_dev);
+	percpu_priv = this_cpu_ptr(priv->percpu_priv);
+
+	percpu_priv->stats.tx_dropped++;
+	percpu_priv->stats.tx_fifo_errors++;
+
+	skb = dpaa_cleanup_tx_fd(priv, fd);
+	dev_kfree_skb_any(skb);
+}
+
+static const struct dpaa_fq_cbs dpaa_fq_cbs = {
+	.rx_defq = { .cb = { .dqrr = rx_default_dqrr } },
+	.tx_defq = { .cb = { .dqrr = conf_dflt_dqrr } },
+	.rx_errq = { .cb = { .dqrr = rx_error_dqrr } },
+	.tx_errq = { .cb = { .dqrr = conf_error_dqrr } },
+	.egress_ern = { .cb = { .ern = egress_ern } }
+};
+
+static void dpaa_eth_napi_enable(struct dpaa_priv *priv)
+{
+	struct dpaa_percpu_priv *percpu_priv;
+	int i;
+
+	for_each_possible_cpu(i) {
+		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+
+		percpu_priv->np.down = 0;
+		napi_enable(&percpu_priv->np.napi);
+	}
+}
+
+static void dpaa_eth_napi_disable(struct dpaa_priv *priv)
+{
+	struct dpaa_percpu_priv *percpu_priv;
+	int i;
+
+	for_each_possible_cpu(i) {
+		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+
+		percpu_priv->np.down = 1;
+		napi_disable(&percpu_priv->np.napi);
+	}
+}
+
+static int dpaa_open(struct net_device *net_dev)
+{
+	struct mac_device *mac_dev;
+	struct dpaa_priv *priv;
+	int err, i;
+
+	priv = netdev_priv(net_dev);
+	mac_dev = priv->mac_dev;
+	dpaa_eth_napi_enable(priv);
+
+	net_dev->phydev = mac_dev->init_phy(net_dev, priv->mac_dev);
+	if (!net_dev->phydev) {
+		netif_err(priv, ifup, net_dev, "init_phy() failed\n");
+		return -ENODEV;
+	}
+
+	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]);
+
+	dpaa_eth_napi_disable(priv);
+
+	return err;
+}
+
+static int dpaa_eth_stop(struct net_device *net_dev)
+{
+	struct dpaa_priv *priv;
+	int err;
+
+	err = dpaa_stop(net_dev);
+
+	priv = netdev_priv(net_dev);
+	dpaa_eth_napi_disable(priv);
+
+	return err;
+}
+
+static const struct net_device_ops dpaa_ops = {
+	.ndo_open = dpaa_open,
+	.ndo_start_xmit = dpaa_start_xmit,
+	.ndo_stop = dpaa_eth_stop,
+	.ndo_tx_timeout = dpaa_tx_timeout,
+	.ndo_get_stats64 = dpaa_get_stats64,
+	.ndo_set_mac_address = dpaa_set_mac_address,
+	.ndo_validate_addr = eth_validate_addr,
+	.ndo_set_rx_mode = dpaa_set_rx_mode,
+};
+
+static int dpaa_napi_add(struct net_device *net_dev)
+{
+	struct dpaa_priv *priv = netdev_priv(net_dev);
+	struct dpaa_percpu_priv *percpu_priv;
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		percpu_priv = per_cpu_ptr(priv->percpu_priv, cpu);
+
+		netif_napi_add(net_dev, &percpu_priv->np.napi,
+			       dpaa_eth_poll, NAPI_POLL_WEIGHT);
+	}
+
+	return 0;
+}
+
+static void dpaa_napi_del(struct net_device *net_dev)
+{
+	struct dpaa_priv *priv = netdev_priv(net_dev);
+	struct dpaa_percpu_priv *percpu_priv;
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		percpu_priv = per_cpu_ptr(priv->percpu_priv, cpu);
+
+		netif_napi_del(&percpu_priv->np.napi);
+	}
+}
+
+static inline void dpaa_bp_free_pf(const struct dpaa_bp *bp,
+				   struct bm_buffer *bmb)
+{
+	dma_addr_t addr = bm_buf_addr(bmb);
+
+	dma_unmap_single(bp->dev, addr, bp->size, DMA_FROM_DEVICE);
+
+	skb_free_frag(phys_to_virt(addr));
+}
+
+/* Alloc the dpaa_bp struct and configure default values */
+static struct dpaa_bp *dpaa_bp_alloc(struct device *dev)
+{
+	struct dpaa_bp *dpaa_bp;
+
+	dpaa_bp = devm_kzalloc(dev, sizeof(*dpaa_bp), GFP_KERNEL);
+	if (!dpaa_bp)
+		return ERR_PTR(-ENOMEM);
+
+	dpaa_bp->bpid = FSL_DPAA_BPID_INV;
+	dpaa_bp->percpu_count = devm_alloc_percpu(dev, *dpaa_bp->percpu_count);
+	dpaa_bp->config_count = FSL_DPAA_ETH_MAX_BUF_COUNT;
+
+	dpaa_bp->seed_cb = dpaa_bp_seed;
+	dpaa_bp->free_buf_cb = dpaa_bp_free_pf;
+
+	return dpaa_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_ingress_cgr_init(struct dpaa_priv *priv)
+{
+	struct qm_mcc_initcgr initcgr;
+	u32 cs_th;
+	int err;
+
+	err = qman_alloc_cgrid(&priv->ingress_cgr.cgrid);
+	if (err < 0) {
+		if (netif_msg_drv(priv))
+			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 CGR will be associated with the SWP affined to the current CPU.
+	 * However, we'll place all our ingress FQs in it.
+	 */
+	err = qman_create_cgr(&priv->ingress_cgr, QMAN_CGR_FLAG_USE_INIT,
+			      &initcgr);
+	if (err < 0) {
+		if (netif_msg_drv(priv))
+			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;
+	}
+	if (netif_msg_drv(priv))
+		pr_debug("Created ingress CGR %d for netdev with hwaddr %pM\n",
+			 priv->ingress_cgr.cgrid, priv->mac_dev->addr);
+
+	priv->use_ingress_cgr = true;
+
+out_error:
+	return err;
+}
+
+static const struct of_device_id dpaa_match[];
+
+static inline u16 dpaa_get_headroom(struct dpaa_buffer_layout *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 + DPAA_PARSE_RESULTS_SIZE +
+		DPAA_TIME_STAMP_SIZE + DPAA_HASH_RESULTS_SIZE);
+
+	return DPAA_FD_DATA_ALIGNMENT ? ALIGN(headroom,
+					      DPAA_FD_DATA_ALIGNMENT) :
+					headroom;
+}
+
+static int dpaa_eth_probe(struct platform_device *pdev)
+{
+	struct dpaa_bp *dpaa_bps[DPAA_BPS_NUM] = {NULL};
+	struct dpaa_percpu_priv *percpu_priv;
+	struct net_device *net_dev = NULL;
+	struct dpaa_fq *dpaa_fq, *tmp;
+	struct dpaa_priv *priv = NULL;
+	struct fm_port_fqs port_fqs;
+	struct mac_device *mac_dev;
+	int err = 0, i, channel;
+	struct device *dev;
+
+	dev = &pdev->dev;
+
+	/* Allocate this early, so we can store relevant information in
+	 * the private area
+	 */
+	net_dev = alloc_etherdev_mq(sizeof(*priv), DPAA_ETH_TXQ_NUM);
+	if (!net_dev) {
+		dev_err(dev, "alloc_etherdev_mq() failed\n");
+		goto alloc_etherdev_mq_failed;
+	}
+
+	/* 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, DPAA_MSG_DEFAULT);
+
+	mac_dev = dpaa_mac_dev_get(pdev);
+	if (IS_ERR(mac_dev)) {
+		dev_err(dev, "dpaa_mac_dev_get() failed\n");
+		err = PTR_ERR(mac_dev);
+		goto mac_probe_failed;
+	}
+
+	/* 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.
+	 */
+	net_dev->mtu = min(dpaa_get_max_mtu(), ETH_DATA_LEN);
+
+	netdev_dbg(net_dev, "Setting initial MTU on net device: %d\n",
+		   net_dev->mtu);
+
+	priv->buf_layout[RX].priv_data_size = DPAA_RX_PRIV_DATA_SIZE; /* Rx */
+	priv->buf_layout[TX].priv_data_size = DPAA_TX_PRIV_DATA_SIZE; /* Tx */
+
+	/* device used for DMA mapping */
+	arch_setup_dma_ops(dev, 0, 0, NULL, false);
+	err = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(40));
+	if (err) {
+		dev_err(dev, "dma_coerce_mask_and_coherent() failed\n");
+		goto dev_mask_failed;
+	}
+
+	/* bp init */
+	for (i = 0; i < DPAA_BPS_NUM; i++) {
+		int err;
+
+		dpaa_bps[i] = dpaa_bp_alloc(dev);
+		if (IS_ERR(dpaa_bps[i]))
+			return PTR_ERR(dpaa_bps[i]);
+		/* the raw size of the buffers used for reception */
+		dpaa_bps[i]->raw_size = bpool_buffer_raw_size(i, DPAA_BPS_NUM);
+		/* avoid runtime computations by keeping the usable size here */
+		dpaa_bps[i]->size = dpaa_bp_size(dpaa_bps[i]->raw_size);
+		dpaa_bps[i]->dev = dev;
+
+		err = dpaa_bp_alloc_pool(dpaa_bps[i]);
+		if (err < 0) {
+			dpaa_bps_free(priv);
+			priv->dpaa_bps[i] = NULL;
+			goto bp_create_failed;
+		}
+		priv->dpaa_bps[i] = dpaa_bps[i];
+	}
+
+	INIT_LIST_HEAD(&priv->dpaa_fq_list);
+
+	memset(&port_fqs, 0, sizeof(port_fqs));
+
+	err = dpaa_alloc_all_fqs(dev, &priv->dpaa_fq_list, &port_fqs);
+	if (err < 0) {
+		dev_err(dev, "dpaa_alloc_all_fqs() failed\n");
+		goto fq_probe_failed;
+	}
+
+	priv->mac_dev = mac_dev;
+
+	channel = dpaa_get_channel();
+	if (channel < 0) {
+		dev_err(dev, "dpaa_get_channel() failed\n");
+		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.
+	 */
+	dpaa_eth_add_channel(priv->channel);
+
+	dpaa_fq_setup(priv, &dpaa_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_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(dpaa_fq, tmp, &priv->dpaa_fq_list, list) {
+		err = dpaa_fq_init(dpaa_fq, false);
+		if (err < 0)
+			goto fq_alloc_failed;
+	}
+
+	priv->tx_headroom = dpaa_get_headroom(&priv->buf_layout[TX]);
+	priv->rx_headroom = dpaa_get_headroom(&priv->buf_layout[RX]);
+
+	/* All real interfaces need their ports initialized */
+	dpaa_eth_init_ports(mac_dev, dpaa_bps, DPAA_BPS_NUM, &port_fqs,
+			    &priv->buf_layout[0], 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 = dpaa_napi_add(net_dev);
+	if (err < 0)
+		goto napi_add_failed;
+
+	err = dpaa_netdev_init(net_dev, &dpaa_ops, tx_timeout);
+	if (err < 0)
+		goto netdev_init_failed;
+
+	netif_info(priv, probe, net_dev, "Probed interface %s\n",
+		   net_dev->name);
+
+	return 0;
+
+netdev_init_failed:
+napi_add_failed:
+	dpaa_napi_del(net_dev);
+alloc_percpu_failed:
+	dpaa_fq_free(dev, &priv->dpaa_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:
+get_channel_failed:
+	dpaa_bps_free(priv);
+bp_create_failed:
+fq_probe_failed:
+dev_mask_failed:
+mac_probe_failed:
+	dev_set_drvdata(dev, NULL);
+	free_netdev(net_dev);
+alloc_etherdev_mq_failed:
+	for (i = 0; i < DPAA_BPS_NUM && dpaa_bps[i]; i++) {
+		if (atomic_read(&dpaa_bps[i]->refs) == 0)
+			devm_kfree(dev, dpaa_bps[i]);
+	}
+	return err;
+}
+
+static int dpaa_remove(struct platform_device *pdev)
+{
+	struct net_device *net_dev;
+	struct dpaa_priv *priv;
+	struct device *dev;
+	int err;
+
+	dev = &pdev->dev;
+	net_dev = dev_get_drvdata(dev);
+
+	priv = netdev_priv(net_dev);
+
+	dev_set_drvdata(dev, NULL);
+	unregister_netdev(net_dev);
+
+	err = dpaa_fq_free(dev, &priv->dpaa_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);
+
+	dpaa_napi_del(net_dev);
+
+	dpaa_bps_free(priv);
+
+	free_netdev(net_dev);
+
+	return err;
+}
+
+static struct platform_device_id dpaa_devtype[] = {
+	{
+		.name = "dpaa-ethernet",
+		.driver_data = 0,
+	}, {
+	}
+};
+MODULE_DEVICE_TABLE(platform, dpaa_devtype);
+
+static struct platform_driver dpaa_driver = {
+	.driver = {
+		.name = KBUILD_MODNAME,
+	},
+	.id_table = dpaa_devtype,
+	.probe = dpaa_eth_probe,
+	.remove = dpaa_remove
+};
+
+static int __init dpaa_load(void)
+{
+	int err;
+
+	pr_debug("FSL DPAA Ethernet driver\n");
+
+	/* initialize dpaa_eth mirror values */
+	dpaa_rx_extra_headroom = fman_get_rx_extra_headroom();
+	dpaa_max_frm = fman_get_max_frm();
+
+	err = platform_driver_register(&dpaa_driver);
+	if (err < 0)
+		pr_err("Error, platform_driver_register() = %d\n", err);
+
+	return err;
+}
+module_init(dpaa_load);
+
+static void __exit dpaa_unload(void)
+{
+	platform_driver_unregister(&dpaa_driver);
+
+	/* Only one channel is used and needs to be released after all
+	 * interfaces are removed
+	 */
+	dpaa_release_channel();
+}
+module_exit(dpaa_unload);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("FSL DPAA Ethernet driver");
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 000000000000..fe98e089cf4d
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
@@ -0,0 +1,144 @@
+/* Copyright 2008 - 2016 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_H
+#define __DPAA_H
+
+#include <linux/netdevice.h>
+#include <soc/fsl/qman.h>
+#include <soc/fsl/bman.h>
+
+#include "fman.h"
+#include "mac.h"
+
+#define DPAA_ETH_TXQ_NUM	NR_CPUS
+
+#define DPAA_BPS_NUM 3 /* number of bpools per interface */
+
+/* More detailed FQ types - used for fine-grained WQ assignments */
+enum dpaa_fq_type {
+	FQ_TYPE_RX_DEFAULT = 1, /* Rx Default FQs */
+	FQ_TYPE_RX_ERROR,	/* Rx Error FQs */
+	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 dpaa_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 dpaa_fq_type fq_type;
+};
+
+struct dpaa_fq_cbs {
+	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 dpaa_bp {
+	/* device used in the DMA mapping operations */
+	struct device *dev;
+	/* current number of buffers in the buffer pool alloted to each CPU */
+	int __percpu *percpu_count;
+	/* all buffers allocated for this pool have this raw size */
+	size_t raw_size;
+	/* all buffers in this pool have this same usable size */
+	size_t size;
+	/* the buffer pools are initialized with config_count buffers for each
+	 * CPU; at runtime the number of buffers per CPU is constantly brought
+	 * back to this level
+	 */
+	u16 config_count;
+	u8 bpid;
+	struct bman_pool *pool;
+	/* bpool can be seeded before use by this cb */
+	int (*seed_cb)(struct dpaa_bp *);
+	/* bpool can be emptied before freeing by this cb */
+	void (*free_buf_cb)(const struct dpaa_bp *, struct bm_buffer *);
+	atomic_t refs;
+};
+
+struct dpaa_napi_portal {
+	struct napi_struct napi;
+	struct qman_portal *p;
+	bool down;
+};
+
+struct dpaa_percpu_priv {
+	struct net_device *net_dev;
+	struct dpaa_napi_portal np;
+	struct rtnl_link_stats64 stats;
+};
+
+struct dpaa_buffer_layout {
+	u16 priv_data_size;
+};
+
+struct dpaa_priv {
+	struct dpaa_percpu_priv __percpu *percpu_priv;
+	struct dpaa_bp *dpaa_bps[DPAA_BPS_NUM];
+	/* 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_TXQ_NUM];
+	struct qman_fq *conf_fqs[DPAA_ETH_TXQ_NUM];
+
+	u16 channel;
+	struct list_head dpaa_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 dpaa_buffer_layout buf_layout[2];
+	u16 rx_headroom;
+};
+#endif	/* __DPAA_H */