Merge branch 'mvneta-64bit'

Gregory CLEMENT says:

====================
Support Armada 37xx SoC (ARMv8 64-bits) in mvneta driver

The Armada 37xx is a new ARMv8 SoC from Marvell using same network
controller as the older Armada 370/38x/XP SoCs. This series adapts the
driver in order to be able to use it on this new SoC. The main changes
are:

- 64-bits support: the first patches allow using the driver on a 64-bit
architecture.

- MBUS support: the mbus configuration is different on Armada 37xx
from the older SoCs.

- per cpu interrupt: Armada 37xx do not support per cpu interrupt for
the NETA IP, the non-per-CPU behavior was added back.

The first patch is an optimization in the rx path in swbm mode.
The second patch remove unnecessary allocation for HWBM.
The first item is solved by patches 4 and 5.
The 2 last items are solved by patch 6.
In patch 7 the dt support is added.

Beside Armada 37xx, this series have been again tested on Armada XP
and Armada 38x (with Hardware Buffer Management and with Software
Buffer Management).

This is the 6th version of the series:
- 1st version:
http://lists.infradead.org/pipermail/linux-arm-kernel/2016-November/469588.html

- 2nd version:
http://lists.infradead.org/pipermail/linux-arm-kernel/2016-November/470476.html

- 3rd version:
http://lists.infradead.org/pipermail/linux-arm-kernel/2016-November/470901.html

- 4th version:
http://lists.infradead.org/pipermail/linux-arm-kernel/2016-November/471039.html

- 5th version:
http://lists.infradead.org/pipermail/linux-arm-kernel/2016-November/471478.html

Changelog:
v5 -> v6:
- Added Tested-by from Marcin Wojtas on the series
- Added Reviewed-by from Jisheng Zhang on patch 3
- Fix eth1 phy mode for Armada 3720 DB board on patch 7

v4 -> v5:
- remove unnecessary cast in patch 3

v3 -> v4:
- Adding new patch: "net: mvneta: do not allocate buffer in rxq init
with HWBM"

- Simplify the HWBM case in patch 3 as suggested by Marcin

v2 -> v3:
- Adding patch 1 "Optimize rx path for small frame"

- Fix the kbuild error by moving the "phys_addr += pp->rx_offset_correction;"
line from patch 2 to patch 3 where rx_offset_correction is introduced.

- Move the memory allocation of the buf_virt_addr of the rxq to be
called by the probe function in order to avoid a memory leak.
====================

Signed-off-by: David S. Miller <[e-mail]>

Documentation/devicetree/bindings/net/marvell-armada-370-neta.txt

···
-* Marvell Armada 370 / Armada XP Ethernet Controller (NETA)
+* Marvell Armada 370 / Armada XP / Armada 3700 Ethernet Controller (NETA)
 
 Required properties:
-- compatible: "marvell,armada-370-neta" or "marvell,armada-xp-neta".
+- compatible: could be one of the followings
+	"marvell,armada-370-neta"
+	"marvell,armada-xp-neta"
+	"marvell,armada-3700-neta"
 - reg: address and length of the register set for the device.
 - interrupts: interrupt for the device
 - phy: See ethernet.txt file in the same directory.

arch/arm64/boot/dts/marvell/armada-3720-db.dts

···
 &pcie0 {
 	status = "okay";
 };
+
+&mdio {
+	status = "okay";
+	phy0: ethernet-phy@0 {
+		reg = <0>;
+	};
+
+	phy1: ethernet-phy@1 {
+		reg = <1>;
+	};
+};
+
+&eth0 {
+	phy-mode = "rgmii-id";
+	phy = <&phy0>;
+	status = "okay";
+};
+
+&eth1 {
+	phy-mode = "sgmii";
+	phy = <&phy1>;
+	status = "okay";
+};

arch/arm64/boot/dts/marvell/armada-37xx.dtsi

···
 				};
 			};
 
+			eth0: ethernet@30000 {
+				   compatible = "marvell,armada-3700-neta";
+				   reg = <0x30000 0x4000>;
+				   interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
+				   clocks = <&sb_periph_clk 8>;
+				   status = "disabled";
+			};
+
+			mdio: mdio@32004 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				compatible = "marvell,orion-mdio";
+				reg = <0x32004 0x4>;
+			};
+
+			eth1: ethernet@40000 {
+				compatible = "marvell,armada-3700-neta";
+				reg = <0x40000 0x4000>;
+				interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&sb_periph_clk 7>;
+				status = "disabled";
+			};
+
 			usb3: usb@58000 {
 				compatible = "marvell,armada3700-xhci",
 				"generic-xhci";

drivers/net/ethernet/marvell/Kconfig

···
 config MVNETA_BM_ENABLE
 	tristate "Marvell Armada 38x/XP network interface BM support"
 	depends on MVNETA
+	depends on !64BIT
 	---help---
 	  This driver supports auxiliary block of the network
 	  interface units in the Marvell ARMADA XP and ARMADA 38x SoC
···
 	  buffer management.
 
 config MVNETA
-	tristate "Marvell Armada 370/38x/XP network interface support"
-	depends on PLAT_ORION || COMPILE_TEST
+	tristate "Marvell Armada 370/38x/XP/37xx network interface support"
+	depends on ARCH_MVEBU || COMPILE_TEST
 	depends on HAS_DMA
-	depends on !64BIT
 	select MVMDIO
 	select FIXED_PHY
 	---help---
 	  This driver supports the network interface units in the
-	  Marvell ARMADA XP, ARMADA 370 and ARMADA 38x SoC family.
+	  Marvell ARMADA XP, ARMADA 370, ARMADA 38x and
+	  ARMADA 37xx SoC family.
 
 	  Note that this driver is distinct from the mv643xx_eth
 	  driver, which should be used for the older Marvell SoCs
···
 
 config MVNETA_BM
 	tristate
+	depends on !64BIT
 	default y if MVNETA=y && MVNETA_BM_ENABLE!=n
 	default MVNETA_BM_ENABLE
 	select HWBM

drivers/net/ethernet/marvell/mvneta.c

···
 /* descriptor aligned size */
 #define MVNETA_DESC_ALIGNED_SIZE	32
 
+/* Number of bytes to be taken into account by HW when putting incoming data
+ * to the buffers. It is needed in case NET_SKB_PAD exceeds maximum packet
+ * offset supported in MVNETA_RXQ_CONFIG_REG(q) registers.
+ */
+#define MVNETA_RX_PKT_OFFSET_CORRECTION		64
+
 #define MVNETA_RX_PKT_SIZE(mtu) \
 	ALIGN((mtu) + MVNETA_MH_SIZE + MVNETA_VLAN_TAG_LEN + \
 	      ETH_HLEN + ETH_FCS_LEN,			     \
···
 	spinlock_t lock;
 	bool is_stopped;
 
+	u32 cause_rx_tx;
+	struct napi_struct napi;
+
 	/* Core clock */
 	struct clk *clk;
 	/* AXI clock */
···
 	u64 ethtool_stats[ARRAY_SIZE(mvneta_statistics)];
 
 	u32 indir[MVNETA_RSS_LU_TABLE_SIZE];
+
+	/* Flags for special SoC configurations */
+	bool neta_armada3700;
+	u16 rx_offset_correction;
 };
 
 /* The mvneta_tx_desc and mvneta_rx_desc structures describe the
···
 
 	u32 pkts_coal;
 	u32 time_coal;
+
+	/* Virtual address of the RX buffer */
+	void  **buf_virt_addr;
 
 	/* Virtual address of the RX DMA descriptors array */
 	struct mvneta_rx_desc *descs;
···
 	return 0;
 }
 
-/* Assign and initialize pools for port. In case of fail
- * buffer manager will remain disabled for current port.
- */
-static int mvneta_bm_port_init(struct platform_device *pdev,
-			       struct mvneta_port *pp)
+static  int mvneta_bm_port_mbus_init(struct mvneta_port *pp)
 {
-	struct device_node *dn = pdev->dev.of_node;
-	u32 long_pool_id, short_pool_id, wsize;
+	u32 wsize;
 	u8 target, attr;
 	int err;
 
···
 	if (err < 0) {
 		netdev_info(pp->dev, "fail to configure mbus window to BM\n");
 		return err;
+	}
+	return 0;
+}
+
+/* Assign and initialize pools for port. In case of fail
+ * buffer manager will remain disabled for current port.
+ */
+static int mvneta_bm_port_init(struct platform_device *pdev,
+			       struct mvneta_port *pp)
+{
+	struct device_node *dn = pdev->dev.of_node;
+	u32 long_pool_id, short_pool_id;
+
+	if (!pp->neta_armada3700) {
+		int ret;
+
+		ret = mvneta_bm_port_mbus_init(pp);
+		if (ret)
+			return ret;
 	}
 
 	if (of_property_read_u32(dn, "bm,pool-long", &long_pool_id)) {
···
 	for_each_present_cpu(cpu) {
 		int rxq_map = 0, txq_map = 0;
 		int rxq, txq;
+		if (!pp->neta_armada3700) {
+			for (rxq = 0; rxq < rxq_number; rxq++)
+				if ((rxq % max_cpu) == cpu)
+					rxq_map |= MVNETA_CPU_RXQ_ACCESS(rxq);
 
-		for (rxq = 0; rxq < rxq_number; rxq++)
-			if ((rxq % max_cpu) == cpu)
-				rxq_map |= MVNETA_CPU_RXQ_ACCESS(rxq);
+			for (txq = 0; txq < txq_number; txq++)
+				if ((txq % max_cpu) == cpu)
+					txq_map |= MVNETA_CPU_TXQ_ACCESS(txq);
 
-		for (txq = 0; txq < txq_number; txq++)
-			if ((txq % max_cpu) == cpu)
-				txq_map |= MVNETA_CPU_TXQ_ACCESS(txq);
+			/* With only one TX queue we configure a special case
+			 * which will allow to get all the irq on a single
+			 * CPU
+			 */
+			if (txq_number == 1)
+				txq_map = (cpu == pp->rxq_def) ?
+					MVNETA_CPU_TXQ_ACCESS(1) : 0;
 
-		/* With only one TX queue we configure a special case
-		 * which will allow to get all the irq on a single
-		 * CPU
-		 */
-		if (txq_number == 1)
-			txq_map = (cpu == pp->rxq_def) ?
-				MVNETA_CPU_TXQ_ACCESS(1) : 0;
+		} else {
+			txq_map = MVNETA_CPU_TXQ_ACCESS_ALL_MASK;
+			rxq_map = MVNETA_CPU_RXQ_ACCESS_ALL_MASK;
+		}
 
 		mvreg_write(pp, MVNETA_CPU_MAP(cpu), rxq_map | txq_map);
 	}
···
 
 /* Handle rx descriptor fill by setting buf_cookie and buf_phys_addr */
 static void mvneta_rx_desc_fill(struct mvneta_rx_desc *rx_desc,
-				u32 phys_addr, u32 cookie)
+				u32 phys_addr, void *virt_addr,
+				struct mvneta_rx_queue *rxq)
 {
-	rx_desc->buf_cookie = cookie;
+	int i;
+
 	rx_desc->buf_phys_addr = phys_addr;
+	i = rx_desc - rxq->descs;
+	rxq->buf_virt_addr[i] = virt_addr;
 }
 
 /* Decrement sent descriptors counter */
···
 
 /* Refill processing for SW buffer management */
 static int mvneta_rx_refill(struct mvneta_port *pp,
-			    struct mvneta_rx_desc *rx_desc)
+			    struct mvneta_rx_desc *rx_desc,
+			    struct mvneta_rx_queue *rxq)
 
 {
 	dma_addr_t phys_addr;
···
 		return -ENOMEM;
 	}
 
-	mvneta_rx_desc_fill(rx_desc, phys_addr, (u32)data);
+	phys_addr += pp->rx_offset_correction;
+	mvneta_rx_desc_fill(rx_desc, phys_addr, data, rxq);
 	return 0;
 }
 
···
 
 	for (i = 0; i < rxq->size; i++) {
 		struct mvneta_rx_desc *rx_desc = rxq->descs + i;
-		void *data = (void *)rx_desc->buf_cookie;
+		void *data = rxq->buf_virt_addr[i];
 
 		dma_unmap_single(pp->dev->dev.parent, rx_desc->buf_phys_addr,
 				 MVNETA_RX_BUF_SIZE(pp->pkt_size), DMA_FROM_DEVICE);
···
 		unsigned char *data;
 		dma_addr_t phys_addr;
 		u32 rx_status, frag_size;
-		int rx_bytes, err;
+		int rx_bytes, err, index;
 
 		rx_done++;
 		rx_status = rx_desc->status;
 		rx_bytes = rx_desc->data_size - (ETH_FCS_LEN + MVNETA_MH_SIZE);
-		data = (unsigned char *)rx_desc->buf_cookie;
+		index = rx_desc - rxq->descs;
+		data = rxq->buf_virt_addr[index];
 		phys_addr = rx_desc->buf_phys_addr;
 
 		if (!mvneta_rxq_desc_is_first_last(rx_status) ||
···
 				goto err_drop_frame;
 
 			dma_sync_single_range_for_cpu(dev->dev.parent,
-						      rx_desc->buf_phys_addr,
+						      phys_addr,
 						      MVNETA_MH_SIZE + NET_SKB_PAD,
 						      rx_bytes,
 						      DMA_FROM_DEVICE);
···
 		}
 
 		/* Refill processing */
-		err = mvneta_rx_refill(pp, rx_desc);
+		err = mvneta_rx_refill(pp, rx_desc, rxq);
 		if (err) {
 			netdev_err(dev, "Linux processing - Can't refill\n");
 			rxq->missed++;
···
 		rx_done++;
 		rx_status = rx_desc->status;
 		rx_bytes = rx_desc->data_size - (ETH_FCS_LEN + MVNETA_MH_SIZE);
-		data = (unsigned char *)rx_desc->buf_cookie;
+		data = (u8 *)(uintptr_t)rx_desc->buf_cookie;
 		phys_addr = rx_desc->buf_phys_addr;
 		pool_id = MVNETA_RX_GET_BM_POOL_ID(rx_desc);
 		bm_pool = &pp->bm_priv->bm_pools[pool_id];
···
 /* Interrupt handling - the callback for request_irq() */
 static irqreturn_t mvneta_isr(int irq, void *dev_id)
 {
+	struct mvneta_port *pp = (struct mvneta_port *)dev_id;
+
+	mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0);
+	napi_schedule(&pp->napi);
+
+	return IRQ_HANDLED;
+}
+
+/* Interrupt handling - the callback for request_percpu_irq() */
+static irqreturn_t mvneta_percpu_isr(int irq, void *dev_id)
+{
 	struct mvneta_pcpu_port *port = (struct mvneta_pcpu_port *)dev_id;
 
 	disable_percpu_irq(port->pp->dev->irq);
···
 	struct mvneta_pcpu_port *port = this_cpu_ptr(pp->ports);
 
 	if (!netif_running(pp->dev)) {
-		napi_complete(&port->napi);
+		napi_complete(napi);
 		return rx_done;
 	}
 
···
 	 */
 	rx_queue = fls(((cause_rx_tx >> 8) & 0xff));
 
-	cause_rx_tx |= port->cause_rx_tx;
+	cause_rx_tx |= pp->neta_armada3700 ? pp->cause_rx_tx :
+		port->cause_rx_tx;
 
 	if (rx_queue) {
 		rx_queue = rx_queue - 1;
···
 
 	if (budget > 0) {
 		cause_rx_tx = 0;
-		napi_complete(&port->napi);
-		enable_percpu_irq(pp->dev->irq, 0);
+		napi_complete(napi);
+
+		if (pp->neta_armada3700) {
+			unsigned long flags;
+
+			local_irq_save(flags);
+			mvreg_write(pp, MVNETA_INTR_NEW_MASK,
+				    MVNETA_RX_INTR_MASK(rxq_number) |
+				    MVNETA_TX_INTR_MASK(txq_number) |
+				    MVNETA_MISCINTR_INTR_MASK);
+			local_irq_restore(flags);
+		} else {
+			enable_percpu_irq(pp->dev->irq, 0);
+		}
 	}
 
-	port->cause_rx_tx = cause_rx_tx;
+	if (pp->neta_armada3700)
+		pp->cause_rx_tx = cause_rx_tx;
+	else
+		port->cause_rx_tx = cause_rx_tx;
+
 	return rx_done;
 }
 
···
 
 	for (i = 0; i < num; i++) {
 		memset(rxq->descs + i, 0, sizeof(struct mvneta_rx_desc));
-		if (mvneta_rx_refill(pp, rxq->descs + i) != 0) {
+		if (mvneta_rx_refill(pp, rxq->descs + i, rxq) != 0) {
 			netdev_err(pp->dev, "%s:rxq %d, %d of %d buffs  filled\n",
 				__func__, rxq->id, i, num);
 			break;
···
 	mvreg_write(pp, MVNETA_RXQ_SIZE_REG(rxq->id), rxq->size);
 
 	/* Set Offset */
-	mvneta_rxq_offset_set(pp, rxq, NET_SKB_PAD);
+	mvneta_rxq_offset_set(pp, rxq, NET_SKB_PAD - pp->rx_offset_correction);
 
 	/* Set coalescing pkts and time */
 	mvneta_rx_pkts_coal_set(pp, rxq, rxq->pkts_coal);
···
 		mvneta_rxq_buf_size_set(pp, rxq,
 					MVNETA_RX_BUF_SIZE(pp->pkt_size));
 		mvneta_rxq_bm_disable(pp, rxq);
+		mvneta_rxq_fill(pp, rxq, rxq->size);
 	} else {
 		mvneta_rxq_bm_enable(pp, rxq);
 		mvneta_rxq_long_pool_set(pp, rxq);
 		mvneta_rxq_short_pool_set(pp, rxq);
+		mvneta_rxq_non_occup_desc_add(pp, rxq, rxq->size);
 	}
-
-	mvneta_rxq_fill(pp, rxq, rxq->size);
 
 	return 0;
 }
···
 	/* start the Rx/Tx activity */
 	mvneta_port_enable(pp);
 
-	/* Enable polling on the port */
-	for_each_online_cpu(cpu) {
-		struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu);
+	if (!pp->neta_armada3700) {
+		/* Enable polling on the port */
+		for_each_online_cpu(cpu) {
+			struct mvneta_pcpu_port *port =
+				per_cpu_ptr(pp->ports, cpu);
 
-		napi_enable(&port->napi);
+			napi_enable(&port->napi);
+		}
+	} else {
+		napi_enable(&pp->napi);
 	}
 
 	/* Unmask interrupts. It has to be done from each CPU */
···
 
 	phy_stop(ndev->phydev);
 
-	for_each_online_cpu(cpu) {
-		struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu);
+	if (!pp->neta_armada3700) {
+		for_each_online_cpu(cpu) {
+			struct mvneta_pcpu_port *port =
+				per_cpu_ptr(pp->ports, cpu);
 
-		napi_disable(&port->napi);
+			napi_disable(&port->napi);
+		}
+	} else {
+		napi_disable(&pp->napi);
 	}
 
 	netif_carrier_off(pp->dev);
···
 		goto err_cleanup_rxqs;
 
 	/* Connect to port interrupt line */
-	ret = request_percpu_irq(pp->dev->irq, mvneta_isr,
-				 MVNETA_DRIVER_NAME, pp->ports);
+	if (pp->neta_armada3700)
+		ret = request_irq(pp->dev->irq, mvneta_isr, 0,
+				  dev->name, pp);
+	else
+		ret = request_percpu_irq(pp->dev->irq, mvneta_percpu_isr,
+					 dev->name, pp->ports);
 	if (ret) {
 		netdev_err(pp->dev, "cannot request irq %d\n", pp->dev->irq);
 		goto err_cleanup_txqs;
 	}
 
-	/* Enable per-CPU interrupt on all the CPU to handle our RX
-	 * queue interrupts
-	 */
-	on_each_cpu(mvneta_percpu_enable, pp, true);
+	if (!pp->neta_armada3700) {
+		/* Enable per-CPU interrupt on all the CPU to handle our RX
+		 * queue interrupts
+		 */
+		on_each_cpu(mvneta_percpu_enable, pp, true);
 
-	pp->is_stopped = false;
-	/* Register a CPU notifier to handle the case where our CPU
-	 * might be taken offline.
-	 */
-	ret = cpuhp_state_add_instance_nocalls(online_hpstate,
-					       &pp->node_online);
-	if (ret)
-		goto err_free_irq;
+		pp->is_stopped = false;
+		/* Register a CPU notifier to handle the case where our CPU
+		 * might be taken offline.
+		 */
+		ret = cpuhp_state_add_instance_nocalls(online_hpstate,
+						       &pp->node_online);
+		if (ret)
+			goto err_free_irq;
 
-	ret = cpuhp_state_add_instance_nocalls(CPUHP_NET_MVNETA_DEAD,
-					       &pp->node_dead);
-	if (ret)
-		goto err_free_online_hp;
+		ret = cpuhp_state_add_instance_nocalls(CPUHP_NET_MVNETA_DEAD,
+						       &pp->node_dead);
+		if (ret)
+			goto err_free_online_hp;
+	}
 
 	/* In default link is down */
 	netif_carrier_off(pp->dev);
···
 	return 0;
 
 err_free_dead_hp:
-	cpuhp_state_remove_instance_nocalls(CPUHP_NET_MVNETA_DEAD,
-					    &pp->node_dead);
+	if (!pp->neta_armada3700)
+		cpuhp_state_remove_instance_nocalls(CPUHP_NET_MVNETA_DEAD,
+						    &pp->node_dead);
 err_free_online_hp:
-	cpuhp_state_remove_instance_nocalls(online_hpstate, &pp->node_online);
+	if (!pp->neta_armada3700)
+		cpuhp_state_remove_instance_nocalls(online_hpstate,
+						    &pp->node_online);
 err_free_irq:
-	on_each_cpu(mvneta_percpu_disable, pp, true);
-	free_percpu_irq(pp->dev->irq, pp->ports);
+	if (pp->neta_armada3700) {
+		free_irq(pp->dev->irq, pp);
+	} else {
+		on_each_cpu(mvneta_percpu_disable, pp, true);
+		free_percpu_irq(pp->dev->irq, pp->ports);
+	}
 err_cleanup_txqs:
 	mvneta_cleanup_txqs(pp);
 err_cleanup_rxqs:
···
 {
 	struct mvneta_port *pp = netdev_priv(dev);
 
-	/* Inform that we are stopping so we don't want to setup the
-	 * driver for new CPUs in the notifiers. The code of the
-	 * notifier for CPU online is protected by the same spinlock,
-	 * so when we get the lock, the notifer work is done.
-	 */
-	spin_lock(&pp->lock);
-	pp->is_stopped = true;
-	spin_unlock(&pp->lock);
+	if (!pp->neta_armada3700) {
+		/* Inform that we are stopping so we don't want to setup the
+		 * driver for new CPUs in the notifiers. The code of the
+		 * notifier for CPU online is protected by the same spinlock,
+		 * so when we get the lock, the notifer work is done.
+		 */
+		spin_lock(&pp->lock);
+		pp->is_stopped = true;
+		spin_unlock(&pp->lock);
 
-	mvneta_stop_dev(pp);
-	mvneta_mdio_remove(pp);
+		mvneta_stop_dev(pp);
+		mvneta_mdio_remove(pp);
 
 	cpuhp_state_remove_instance_nocalls(online_hpstate, &pp->node_online);
 	cpuhp_state_remove_instance_nocalls(CPUHP_NET_MVNETA_DEAD,
 					    &pp->node_dead);
-	on_each_cpu(mvneta_percpu_disable, pp, true);
-	free_percpu_irq(dev->irq, pp->ports);
+		on_each_cpu(mvneta_percpu_disable, pp, true);
+		free_percpu_irq(dev->irq, pp->ports);
+	} else {
+		mvneta_stop_dev(pp);
+		mvneta_mdio_remove(pp);
+		free_irq(dev->irq, pp);
+	}
+
 	mvneta_cleanup_rxqs(pp);
 	mvneta_cleanup_txqs(pp);
 
···
 				   const u8 *key, const u8 hfunc)
 {
 	struct mvneta_port *pp = netdev_priv(dev);
+
+	/* Current code for Armada 3700 doesn't support RSS features yet */
+	if (pp->neta_armada3700)
+		return -EOPNOTSUPP;
+
 	/* We require at least one supported parameter to be changed
 	 * and no change in any of the unsupported parameters
 	 */
···
 				   u8 *hfunc)
 {
 	struct mvneta_port *pp = netdev_priv(dev);
+
+	/* Current code for Armada 3700 doesn't support RSS features yet */
+	if (pp->neta_armada3700)
+		return -EOPNOTSUPP;
 
 	if (hfunc)
 		*hfunc = ETH_RSS_HASH_TOP;
···
 		rxq->size = pp->rx_ring_size;
 		rxq->pkts_coal = MVNETA_RX_COAL_PKTS;
 		rxq->time_coal = MVNETA_RX_COAL_USEC;
+		rxq->buf_virt_addr = devm_kmalloc(pp->dev->dev.parent,
+						  rxq->size * sizeof(void *),
+						  GFP_KERNEL);
+		if (!rxq->buf_virt_addr)
+			return -ENOMEM;
 	}
 
 	return 0;
···
 	win_enable = 0x3f;
 	win_protect = 0;
 
-	for (i = 0; i < dram->num_cs; i++) {
-		const struct mbus_dram_window *cs = dram->cs + i;
-		mvreg_write(pp, MVNETA_WIN_BASE(i), (cs->base & 0xffff0000) |
-			    (cs->mbus_attr << 8) | dram->mbus_dram_target_id);
+	if (dram) {
+		for (i = 0; i < dram->num_cs; i++) {
+			const struct mbus_dram_window *cs = dram->cs + i;
 
-		mvreg_write(pp, MVNETA_WIN_SIZE(i),
-			    (cs->size - 1) & 0xffff0000);
+			mvreg_write(pp, MVNETA_WIN_BASE(i),
+				    (cs->base & 0xffff0000) |
+				    (cs->mbus_attr << 8) |
+				    dram->mbus_dram_target_id);
 
-		win_enable &= ~(1 << i);
-		win_protect |= 3 << (2 * i);
+			mvreg_write(pp, MVNETA_WIN_SIZE(i),
+				    (cs->size - 1) & 0xffff0000);
+
+			win_enable &= ~(1 << i);
+			win_protect |= 3 << (2 * i);
+		}
+	} else {
+		/* For Armada3700 open default 4GB Mbus window, leaving
+		 * arbitration of target/attribute to a different layer
+		 * of configuration.
+		 */
+		mvreg_write(pp, MVNETA_WIN_SIZE(0), 0xffff0000);
+		win_enable &= ~BIT(0);
+		win_protect = 3;
 	}
 
 	mvreg_write(pp, MVNETA_BASE_ADDR_ENABLE, win_enable);
···
 
 	pp->rxq_def = rxq_def;
 
+	/* Set RX packet offset correction for platforms, whose
+	 * NET_SKB_PAD, exceeds 64B. It should be 64B for 64-bit
+	 * platforms and 0B for 32-bit ones.
+	 */
+	pp->rx_offset_correction =
+		max(0, NET_SKB_PAD - MVNETA_RX_PKT_OFFSET_CORRECTION);
+
 	pp->indir[0] = rxq_def;
+
+	/* Get special SoC configurations */
+	if (of_device_is_compatible(dn, "marvell,armada-3700-neta"))
+		pp->neta_armada3700 = true;
 
 	pp->clk = devm_clk_get(&pdev->dev, "core");
 	if (IS_ERR(pp->clk))
···
 	pp->tx_csum_limit = tx_csum_limit;
 
 	dram_target_info = mv_mbus_dram_info();
-	if (dram_target_info)
+	/* Armada3700 requires setting default configuration of Mbus
+	 * windows, however without using filled mbus_dram_target_info
+	 * structure.
+	 */
+	if (dram_target_info || pp->neta_armada3700)
 		mvneta_conf_mbus_windows(pp, dram_target_info);
 
 	pp->tx_ring_size = MVNETA_MAX_TXD;
···
 		goto err_netdev;
 	}
 
-	for_each_present_cpu(cpu) {
-		struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu);
+	/* Armada3700 network controller does not support per-cpu
+	 * operation, so only single NAPI should be initialized.
+	 */
+	if (pp->neta_armada3700) {
+		netif_napi_add(dev, &pp->napi, mvneta_poll, NAPI_POLL_WEIGHT);
+	} else {
+		for_each_present_cpu(cpu) {
+			struct mvneta_pcpu_port *port =
+				per_cpu_ptr(pp->ports, cpu);
 
-		netif_napi_add(dev, &port->napi, mvneta_poll, NAPI_POLL_WEIGHT);
-		port->pp = pp;
+			netif_napi_add(dev, &port->napi, mvneta_poll,
+				       NAPI_POLL_WEIGHT);
+			port->pp = pp;
+		}
 	}
 
 	dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO;
···
 static const struct of_device_id mvneta_match[] = {
 	{ .compatible = "marvell,armada-370-neta" },
 	{ .compatible = "marvell,armada-xp-neta" },
+	{ .compatible = "marvell,armada-3700-neta" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, mvneta_match);