Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2280 insertions, 0 deletions

diff --git a/drivers/net/ethernet/ti/netcp_core.c b/drivers/net/ethernet/ti/netcp_core.c
new file mode 100644
index 000000000..9eb9eaff4
--- /dev/null
+++ b/drivers/net/ethernet/ti/netcp_core.c
@@ -0,0 +1,2280 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Keystone NetCP Core driver
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated
+ * Authors:	Sandeep Nair <sandeep_n@ti.com>
+ *		Sandeep Paulraj <s-paulraj@ti.com>
+ *		Cyril Chemparathy <cyril@ti.com>
+ *		Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *		Murali Karicheri <m-karicheri2@ti.com>
+ *		Wingman Kwok <w-kwok2@ti.com>
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_net.h>
+#include <linux/of_address.h>
+#include <linux/if_vlan.h>
+#include <linux/pm_runtime.h>
+#include <linux/platform_device.h>
+#include <linux/soc/ti/knav_qmss.h>
+#include <linux/soc/ti/knav_dma.h>
+
+#include "netcp.h"
+
+#define NETCP_SOP_OFFSET	(NET_IP_ALIGN + NET_SKB_PAD)
+#define NETCP_TX_TIMEOUT	(5 * HZ)
+#define NETCP_PACKET_SIZE	(ETH_FRAME_LEN + ETH_FCS_LEN)
+#define NETCP_MIN_PACKET_SIZE	ETH_ZLEN
+#define NETCP_MAX_MCAST_ADDR	16
+
+#define NETCP_EFUSE_REG_INDEX	0
+
+#define NETCP_MOD_PROBE_SKIPPED	1
+#define NETCP_MOD_PROBE_FAILED	2
+
+#define NETCP_DEBUG (NETIF_MSG_HW	| NETIF_MSG_WOL		|	\
+		    NETIF_MSG_DRV	| NETIF_MSG_LINK	|	\
+		    NETIF_MSG_IFUP	| NETIF_MSG_INTR	|	\
+		    NETIF_MSG_PROBE	| NETIF_MSG_TIMER	|	\
+		    NETIF_MSG_IFDOWN	| NETIF_MSG_RX_ERR	|	\
+		    NETIF_MSG_TX_ERR	| NETIF_MSG_TX_DONE	|	\
+		    NETIF_MSG_PKTDATA	| NETIF_MSG_TX_QUEUED	|	\
+		    NETIF_MSG_RX_STATUS)
+
+#define NETCP_EFUSE_ADDR_SWAP	2
+
+#define knav_queue_get_id(q)	knav_queue_device_control(q, \
+				KNAV_QUEUE_GET_ID, (unsigned long)NULL)
+
+#define knav_queue_enable_notify(q) knav_queue_device_control(q,	\
+					KNAV_QUEUE_ENABLE_NOTIFY,	\
+					(unsigned long)NULL)
+
+#define knav_queue_disable_notify(q) knav_queue_device_control(q,	\
+					KNAV_QUEUE_DISABLE_NOTIFY,	\
+					(unsigned long)NULL)
+
+#define knav_queue_get_count(q)	knav_queue_device_control(q, \
+				KNAV_QUEUE_GET_COUNT, (unsigned long)NULL)
+
+#define for_each_netcp_module(module)			\
+	list_for_each_entry(module, &netcp_modules, module_list)
+
+#define for_each_netcp_device_module(netcp_device, inst_modpriv) \
+	list_for_each_entry(inst_modpriv, \
+		&((netcp_device)->modpriv_head), inst_list)
+
+#define for_each_module(netcp, intf_modpriv)			\
+	list_for_each_entry(intf_modpriv, &netcp->module_head, intf_list)
+
+/* Module management structures */
+struct netcp_device {
+	struct list_head	device_list;
+	struct list_head	interface_head;
+	struct list_head	modpriv_head;
+	struct device		*device;
+};
+
+struct netcp_inst_modpriv {
+	struct netcp_device	*netcp_device;
+	struct netcp_module	*netcp_module;
+	struct list_head	inst_list;
+	void			*module_priv;
+};
+
+struct netcp_intf_modpriv {
+	struct netcp_intf	*netcp_priv;
+	struct netcp_module	*netcp_module;
+	struct list_head	intf_list;
+	void			*module_priv;
+};
+
+struct netcp_tx_cb {
+	void	*ts_context;
+	void	(*txtstamp)(void *context, struct sk_buff *skb);
+};
+
+static LIST_HEAD(netcp_devices);
+static LIST_HEAD(netcp_modules);
+static DEFINE_MUTEX(netcp_modules_lock);
+
+static int netcp_debug_level = -1;
+module_param(netcp_debug_level, int, 0);
+MODULE_PARM_DESC(netcp_debug_level, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)");
+
+/* Helper functions - Get/Set */
+static void get_pkt_info(dma_addr_t *buff, u32 *buff_len, dma_addr_t *ndesc,
+			 struct knav_dma_desc *desc)
+{
+	*buff_len = le32_to_cpu(desc->buff_len);
+	*buff = le32_to_cpu(desc->buff);
+	*ndesc = le32_to_cpu(desc->next_desc);
+}
+
+static void get_desc_info(u32 *desc_info, u32 *pkt_info,
+			  struct knav_dma_desc *desc)
+{
+	*desc_info = le32_to_cpu(desc->desc_info);
+	*pkt_info = le32_to_cpu(desc->packet_info);
+}
+
+static u32 get_sw_data(int index, struct knav_dma_desc *desc)
+{
+	/* No Endian conversion needed as this data is untouched by hw */
+	return desc->sw_data[index];
+}
+
+/* use these macros to get sw data */
+#define GET_SW_DATA0(desc) get_sw_data(0, desc)
+#define GET_SW_DATA1(desc) get_sw_data(1, desc)
+#define GET_SW_DATA2(desc) get_sw_data(2, desc)
+#define GET_SW_DATA3(desc) get_sw_data(3, desc)
+
+static void get_org_pkt_info(dma_addr_t *buff, u32 *buff_len,
+			     struct knav_dma_desc *desc)
+{
+	*buff = le32_to_cpu(desc->orig_buff);
+	*buff_len = le32_to_cpu(desc->orig_len);
+}
+
+static void get_words(dma_addr_t *words, int num_words, __le32 *desc)
+{
+	int i;
+
+	for (i = 0; i < num_words; i++)
+		words[i] = le32_to_cpu(desc[i]);
+}
+
+static void set_pkt_info(dma_addr_t buff, u32 buff_len, u32 ndesc,
+			 struct knav_dma_desc *desc)
+{
+	desc->buff_len = cpu_to_le32(buff_len);
+	desc->buff = cpu_to_le32(buff);
+	desc->next_desc = cpu_to_le32(ndesc);
+}
+
+static void set_desc_info(u32 desc_info, u32 pkt_info,
+			  struct knav_dma_desc *desc)
+{
+	desc->desc_info = cpu_to_le32(desc_info);
+	desc->packet_info = cpu_to_le32(pkt_info);
+}
+
+static void set_sw_data(int index, u32 data, struct knav_dma_desc *desc)
+{
+	/* No Endian conversion needed as this data is untouched by hw */
+	desc->sw_data[index] = data;
+}
+
+/* use these macros to set sw data */
+#define SET_SW_DATA0(data, desc) set_sw_data(0, data, desc)
+#define SET_SW_DATA1(data, desc) set_sw_data(1, data, desc)
+#define SET_SW_DATA2(data, desc) set_sw_data(2, data, desc)
+#define SET_SW_DATA3(data, desc) set_sw_data(3, data, desc)
+
+static void set_org_pkt_info(dma_addr_t buff, u32 buff_len,
+			     struct knav_dma_desc *desc)
+{
+	desc->orig_buff = cpu_to_le32(buff);
+	desc->orig_len = cpu_to_le32(buff_len);
+}
+
+static void set_words(u32 *words, int num_words, __le32 *desc)
+{
+	int i;
+
+	for (i = 0; i < num_words; i++)
+		desc[i] = cpu_to_le32(words[i]);
+}
+
+/* Read the e-fuse value as 32 bit values to be endian independent */
+static int emac_arch_get_mac_addr(char *x, void __iomem *efuse_mac, u32 swap)
+{
+	unsigned int addr0, addr1;
+
+	addr1 = readl(efuse_mac + 4);
+	addr0 = readl(efuse_mac);
+
+	switch (swap) {
+	case NETCP_EFUSE_ADDR_SWAP:
+		addr0 = addr1;
+		addr1 = readl(efuse_mac);
+		break;
+	default:
+		break;
+	}
+
+	x[0] = (addr1 & 0x0000ff00) >> 8;
+	x[1] = addr1 & 0x000000ff;
+	x[2] = (addr0 & 0xff000000) >> 24;
+	x[3] = (addr0 & 0x00ff0000) >> 16;
+	x[4] = (addr0 & 0x0000ff00) >> 8;
+	x[5] = addr0 & 0x000000ff;
+
+	return 0;
+}
+
+/* Module management routines */
+static int netcp_register_interface(struct netcp_intf *netcp)
+{
+	int ret;
+
+	ret = register_netdev(netcp->ndev);
+	if (!ret)
+		netcp->netdev_registered = true;
+	return ret;
+}
+
+static int netcp_module_probe(struct netcp_device *netcp_device,
+			      struct netcp_module *module)
+{
+	struct device *dev = netcp_device->device;
+	struct device_node *devices, *interface, *node = dev->of_node;
+	struct device_node *child;
+	struct netcp_inst_modpriv *inst_modpriv;
+	struct netcp_intf *netcp_intf;
+	struct netcp_module *tmp;
+	bool primary_module_registered = false;
+	int ret;
+
+	/* Find this module in the sub-tree for this device */
+	devices = of_get_child_by_name(node, "netcp-devices");
+	if (!devices) {
+		dev_err(dev, "could not find netcp-devices node\n");
+		return NETCP_MOD_PROBE_SKIPPED;
+	}
+
+	for_each_available_child_of_node(devices, child) {
+		const char *name;
+		char node_name[32];
+
+		if (of_property_read_string(child, "label", &name) < 0) {
+			snprintf(node_name, sizeof(node_name), "%pOFn", child);
+			name = node_name;
+		}
+		if (!strcasecmp(module->name, name))
+			break;
+	}
+
+	of_node_put(devices);
+	/* If module not used for this device, skip it */
+	if (!child) {
+		dev_warn(dev, "module(%s) not used for device\n", module->name);
+		return NETCP_MOD_PROBE_SKIPPED;
+	}
+
+	inst_modpriv = devm_kzalloc(dev, sizeof(*inst_modpriv), GFP_KERNEL);
+	if (!inst_modpriv) {
+		of_node_put(child);
+		return -ENOMEM;
+	}
+
+	inst_modpriv->netcp_device = netcp_device;
+	inst_modpriv->netcp_module = module;
+	list_add_tail(&inst_modpriv->inst_list, &netcp_device->modpriv_head);
+
+	ret = module->probe(netcp_device, dev, child,
+			    &inst_modpriv->module_priv);
+	of_node_put(child);
+	if (ret) {
+		dev_err(dev, "Probe of module(%s) failed with %d\n",
+			module->name, ret);
+		list_del(&inst_modpriv->inst_list);
+		devm_kfree(dev, inst_modpriv);
+		return NETCP_MOD_PROBE_FAILED;
+	}
+
+	/* Attach modules only if the primary module is probed */
+	for_each_netcp_module(tmp) {
+		if (tmp->primary)
+			primary_module_registered = true;
+	}
+
+	if (!primary_module_registered)
+		return 0;
+
+	/* Attach module to interfaces */
+	list_for_each_entry(netcp_intf, &netcp_device->interface_head,
+			    interface_list) {
+		struct netcp_intf_modpriv *intf_modpriv;
+
+		intf_modpriv = devm_kzalloc(dev, sizeof(*intf_modpriv),
+					    GFP_KERNEL);
+		if (!intf_modpriv)
+			return -ENOMEM;
+
+		interface = of_parse_phandle(netcp_intf->node_interface,
+					     module->name, 0);
+
+		if (!interface) {
+			devm_kfree(dev, intf_modpriv);
+			continue;
+		}
+
+		intf_modpriv->netcp_priv = netcp_intf;
+		intf_modpriv->netcp_module = module;
+		list_add_tail(&intf_modpriv->intf_list,
+			      &netcp_intf->module_head);
+
+		ret = module->attach(inst_modpriv->module_priv,
+				     netcp_intf->ndev, interface,
+				     &intf_modpriv->module_priv);
+		of_node_put(interface);
+		if (ret) {
+			dev_dbg(dev, "Attach of module %s declined with %d\n",
+				module->name, ret);
+			list_del(&intf_modpriv->intf_list);
+			devm_kfree(dev, intf_modpriv);
+			continue;
+		}
+	}
+
+	/* Now register the interface with netdev */
+	list_for_each_entry(netcp_intf,
+			    &netcp_device->interface_head,
+			    interface_list) {
+		/* If interface not registered then register now */
+		if (!netcp_intf->netdev_registered) {
+			ret = netcp_register_interface(netcp_intf);
+			if (ret)
+				return -ENODEV;
+		}
+	}
+	return 0;
+}
+
+int netcp_register_module(struct netcp_module *module)
+{
+	struct netcp_device *netcp_device;
+	struct netcp_module *tmp;
+	int ret;
+
+	if (!module->name) {
+		WARN(1, "error registering netcp module: no name\n");
+		return -EINVAL;
+	}
+
+	if (!module->probe) {
+		WARN(1, "error registering netcp module: no probe\n");
+		return -EINVAL;
+	}
+
+	mutex_lock(&netcp_modules_lock);
+
+	for_each_netcp_module(tmp) {
+		if (!strcasecmp(tmp->name, module->name)) {
+			mutex_unlock(&netcp_modules_lock);
+			return -EEXIST;
+		}
+	}
+	list_add_tail(&module->module_list, &netcp_modules);
+
+	list_for_each_entry(netcp_device, &netcp_devices, device_list) {
+		ret = netcp_module_probe(netcp_device, module);
+		if (ret < 0)
+			goto fail;
+	}
+	mutex_unlock(&netcp_modules_lock);
+	return 0;
+
+fail:
+	mutex_unlock(&netcp_modules_lock);
+	netcp_unregister_module(module);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(netcp_register_module);
+
+static void netcp_release_module(struct netcp_device *netcp_device,
+				 struct netcp_module *module)
+{
+	struct netcp_inst_modpriv *inst_modpriv, *inst_tmp;
+	struct netcp_intf *netcp_intf, *netcp_tmp;
+	struct device *dev = netcp_device->device;
+
+	/* Release the module from each interface */
+	list_for_each_entry_safe(netcp_intf, netcp_tmp,
+				 &netcp_device->interface_head,
+				 interface_list) {
+		struct netcp_intf_modpriv *intf_modpriv, *intf_tmp;
+
+		list_for_each_entry_safe(intf_modpriv, intf_tmp,
+					 &netcp_intf->module_head,
+					 intf_list) {
+			if (intf_modpriv->netcp_module == module) {
+				module->release(intf_modpriv->module_priv);
+				list_del(&intf_modpriv->intf_list);
+				devm_kfree(dev, intf_modpriv);
+				break;
+			}
+		}
+	}
+
+	/* Remove the module from each instance */
+	list_for_each_entry_safe(inst_modpriv, inst_tmp,
+				 &netcp_device->modpriv_head, inst_list) {
+		if (inst_modpriv->netcp_module == module) {
+			module->remove(netcp_device,
+				       inst_modpriv->module_priv);
+			list_del(&inst_modpriv->inst_list);
+			devm_kfree(dev, inst_modpriv);
+			break;
+		}
+	}
+}
+
+void netcp_unregister_module(struct netcp_module *module)
+{
+	struct netcp_device *netcp_device;
+	struct netcp_module *module_tmp;
+
+	mutex_lock(&netcp_modules_lock);
+
+	list_for_each_entry(netcp_device, &netcp_devices, device_list) {
+		netcp_release_module(netcp_device, module);
+	}
+
+	/* Remove the module from the module list */
+	for_each_netcp_module(module_tmp) {
+		if (module == module_tmp) {
+			list_del(&module->module_list);
+			break;
+		}
+	}
+
+	mutex_unlock(&netcp_modules_lock);
+}
+EXPORT_SYMBOL_GPL(netcp_unregister_module);
+
+void *netcp_module_get_intf_data(struct netcp_module *module,
+				 struct netcp_intf *intf)
+{
+	struct netcp_intf_modpriv *intf_modpriv;
+
+	list_for_each_entry(intf_modpriv, &intf->module_head, intf_list)
+		if (intf_modpriv->netcp_module == module)
+			return intf_modpriv->module_priv;
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(netcp_module_get_intf_data);
+
+/* Module TX and RX Hook management */
+struct netcp_hook_list {
+	struct list_head	 list;
+	netcp_hook_rtn		*hook_rtn;
+	void			*hook_data;
+	int			 order;
+};
+
+int netcp_register_txhook(struct netcp_intf *netcp_priv, int order,
+			  netcp_hook_rtn *hook_rtn, void *hook_data)
+{
+	struct netcp_hook_list *entry;
+	struct netcp_hook_list *next;
+	unsigned long flags;
+
+	entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
+	if (!entry)
+		return -ENOMEM;
+
+	entry->hook_rtn  = hook_rtn;
+	entry->hook_data = hook_data;
+	entry->order     = order;
+
+	spin_lock_irqsave(&netcp_priv->lock, flags);
+	list_for_each_entry(next, &netcp_priv->txhook_list_head, list) {
+		if (next->order > order)
+			break;
+	}
+	__list_add(&entry->list, next->list.prev, &next->list);
+	spin_unlock_irqrestore(&netcp_priv->lock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(netcp_register_txhook);
+
+int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order,
+			    netcp_hook_rtn *hook_rtn, void *hook_data)
+{
+	struct netcp_hook_list *next, *n;
+	unsigned long flags;
+
+	spin_lock_irqsave(&netcp_priv->lock, flags);
+	list_for_each_entry_safe(next, n, &netcp_priv->txhook_list_head, list) {
+		if ((next->order     == order) &&
+		    (next->hook_rtn  == hook_rtn) &&
+		    (next->hook_data == hook_data)) {
+			list_del(&next->list);
+			spin_unlock_irqrestore(&netcp_priv->lock, flags);
+			devm_kfree(netcp_priv->dev, next);
+			return 0;
+		}
+	}
+	spin_unlock_irqrestore(&netcp_priv->lock, flags);
+	return -ENOENT;
+}
+EXPORT_SYMBOL_GPL(netcp_unregister_txhook);
+
+int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order,
+			  netcp_hook_rtn *hook_rtn, void *hook_data)
+{
+	struct netcp_hook_list *entry;
+	struct netcp_hook_list *next;
+	unsigned long flags;
+
+	entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
+	if (!entry)
+		return -ENOMEM;
+
+	entry->hook_rtn  = hook_rtn;
+	entry->hook_data = hook_data;
+	entry->order     = order;
+
+	spin_lock_irqsave(&netcp_priv->lock, flags);
+	list_for_each_entry(next, &netcp_priv->rxhook_list_head, list) {
+		if (next->order > order)
+			break;
+	}
+	__list_add(&entry->list, next->list.prev, &next->list);
+	spin_unlock_irqrestore(&netcp_priv->lock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(netcp_register_rxhook);
+
+int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order,
+			    netcp_hook_rtn *hook_rtn, void *hook_data)
+{
+	struct netcp_hook_list *next, *n;
+	unsigned long flags;
+
+	spin_lock_irqsave(&netcp_priv->lock, flags);
+	list_for_each_entry_safe(next, n, &netcp_priv->rxhook_list_head, list) {
+		if ((next->order     == order) &&
+		    (next->hook_rtn  == hook_rtn) &&
+		    (next->hook_data == hook_data)) {
+			list_del(&next->list);
+			spin_unlock_irqrestore(&netcp_priv->lock, flags);
+			devm_kfree(netcp_priv->dev, next);
+			return 0;
+		}
+	}
+	spin_unlock_irqrestore(&netcp_priv->lock, flags);
+
+	return -ENOENT;
+}
+EXPORT_SYMBOL_GPL(netcp_unregister_rxhook);
+
+static void netcp_frag_free(bool is_frag, void *ptr)
+{
+	if (is_frag)
+		skb_free_frag(ptr);
+	else
+		kfree(ptr);
+}
+
+static void netcp_free_rx_desc_chain(struct netcp_intf *netcp,
+				     struct knav_dma_desc *desc)
+{
+	struct knav_dma_desc *ndesc;
+	dma_addr_t dma_desc, dma_buf;
+	unsigned int buf_len, dma_sz = sizeof(*ndesc);
+	void *buf_ptr;
+	u32 tmp;
+
+	get_words(&dma_desc, 1, &desc->next_desc);
+
+	while (dma_desc) {
+		ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
+		if (unlikely(!ndesc)) {
+			dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
+			break;
+		}
+		get_pkt_info(&dma_buf, &tmp, &dma_desc, ndesc);
+		/* warning!!!! We are retrieving the virtual ptr in the sw_data
+		 * field as a 32bit value. Will not work on 64bit machines
+		 */
+		buf_ptr = (void *)GET_SW_DATA0(ndesc);
+		buf_len = (int)GET_SW_DATA1(desc);
+		dma_unmap_page(netcp->dev, dma_buf, PAGE_SIZE, DMA_FROM_DEVICE);
+		__free_page(buf_ptr);
+		knav_pool_desc_put(netcp->rx_pool, desc);
+	}
+	/* warning!!!! We are retrieving the virtual ptr in the sw_data
+	 * field as a 32bit value. Will not work on 64bit machines
+	 */
+	buf_ptr = (void *)GET_SW_DATA0(desc);
+	buf_len = (int)GET_SW_DATA1(desc);
+
+	if (buf_ptr)
+		netcp_frag_free(buf_len <= PAGE_SIZE, buf_ptr);
+	knav_pool_desc_put(netcp->rx_pool, desc);
+}
+
+static void netcp_empty_rx_queue(struct netcp_intf *netcp)
+{
+	struct netcp_stats *rx_stats = &netcp->stats;
+	struct knav_dma_desc *desc;
+	unsigned int dma_sz;
+	dma_addr_t dma;
+
+	for (; ;) {
+		dma = knav_queue_pop(netcp->rx_queue, &dma_sz);
+		if (!dma)
+			break;
+
+		desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);
+		if (unlikely(!desc)) {
+			dev_err(netcp->ndev_dev, "%s: failed to unmap Rx desc\n",
+				__func__);
+			rx_stats->rx_errors++;
+			continue;
+		}
+		netcp_free_rx_desc_chain(netcp, desc);
+		rx_stats->rx_dropped++;
+	}
+}
+
+static int netcp_process_one_rx_packet(struct netcp_intf *netcp)
+{
+	struct netcp_stats *rx_stats = &netcp->stats;
+	unsigned int dma_sz, buf_len, org_buf_len;
+	struct knav_dma_desc *desc, *ndesc;
+	unsigned int pkt_sz = 0, accum_sz;
+	struct netcp_hook_list *rx_hook;
+	dma_addr_t dma_desc, dma_buff;
+	struct netcp_packet p_info;
+	struct sk_buff *skb;
+	void *org_buf_ptr;
+	u32 tmp;
+
+	dma_desc = knav_queue_pop(netcp->rx_queue, &dma_sz);
+	if (!dma_desc)
+		return -1;
+
+	desc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
+	if (unlikely(!desc)) {
+		dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
+		return 0;
+	}
+
+	get_pkt_info(&dma_buff, &buf_len, &dma_desc, desc);
+	/* warning!!!! We are retrieving the virtual ptr in the sw_data
+	 * field as a 32bit value. Will not work on 64bit machines
+	 */
+	org_buf_ptr = (void *)GET_SW_DATA0(desc);
+	org_buf_len = (int)GET_SW_DATA1(desc);
+
+	if (unlikely(!org_buf_ptr)) {
+		dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");
+		goto free_desc;
+	}
+
+	pkt_sz &= KNAV_DMA_DESC_PKT_LEN_MASK;
+	accum_sz = buf_len;
+	dma_unmap_single(netcp->dev, dma_buff, buf_len, DMA_FROM_DEVICE);
+
+	/* Build a new sk_buff for the primary buffer */
+	skb = build_skb(org_buf_ptr, org_buf_len);
+	if (unlikely(!skb)) {
+		dev_err(netcp->ndev_dev, "build_skb() failed\n");
+		goto free_desc;
+	}
+
+	/* update data, tail and len */
+	skb_reserve(skb, NETCP_SOP_OFFSET);
+	__skb_put(skb, buf_len);
+
+	/* Fill in the page fragment list */
+	while (dma_desc) {
+		struct page *page;
+
+		ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
+		if (unlikely(!ndesc)) {
+			dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
+			goto free_desc;
+		}
+
+		get_pkt_info(&dma_buff, &buf_len, &dma_desc, ndesc);
+		/* warning!!!! We are retrieving the virtual ptr in the sw_data
+		 * field as a 32bit value. Will not work on 64bit machines
+		 */
+		page = (struct page *)GET_SW_DATA0(ndesc);
+
+		if (likely(dma_buff && buf_len && page)) {
+			dma_unmap_page(netcp->dev, dma_buff, PAGE_SIZE,
+				       DMA_FROM_DEVICE);
+		} else {
+			dev_err(netcp->ndev_dev, "Bad Rx desc dma_buff(%pad), len(%d), page(%p)\n",
+				&dma_buff, buf_len, page);
+			goto free_desc;
+		}
+
+		skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
+				offset_in_page(dma_buff), buf_len, PAGE_SIZE);
+		accum_sz += buf_len;
+
+		/* Free the descriptor */
+		knav_pool_desc_put(netcp->rx_pool, ndesc);
+	}
+
+	/* check for packet len and warn */
+	if (unlikely(pkt_sz != accum_sz))
+		dev_dbg(netcp->ndev_dev, "mismatch in packet size(%d) & sum of fragments(%d)\n",
+			pkt_sz, accum_sz);
+
+	/* Newer version of the Ethernet switch can trim the Ethernet FCS
+	 * from the packet and is indicated in hw_cap. So trim it only for
+	 * older h/w
+	 */
+	if (!(netcp->hw_cap & ETH_SW_CAN_REMOVE_ETH_FCS))
+		__pskb_trim(skb, skb->len - ETH_FCS_LEN);
+
+	/* Call each of the RX hooks */
+	p_info.skb = skb;
+	skb->dev = netcp->ndev;
+	p_info.rxtstamp_complete = false;
+	get_desc_info(&tmp, &p_info.eflags, desc);
+	p_info.epib = desc->epib;
+	p_info.psdata = (u32 __force *)desc->psdata;
+	p_info.eflags = ((p_info.eflags >> KNAV_DMA_DESC_EFLAGS_SHIFT) &
+			 KNAV_DMA_DESC_EFLAGS_MASK);
+	list_for_each_entry(rx_hook, &netcp->rxhook_list_head, list) {
+		int ret;
+
+		ret = rx_hook->hook_rtn(rx_hook->order, rx_hook->hook_data,
+					&p_info);
+		if (unlikely(ret)) {
+			dev_err(netcp->ndev_dev, "RX hook %d failed: %d\n",
+				rx_hook->order, ret);
+			/* Free the primary descriptor */
+			rx_stats->rx_dropped++;
+			knav_pool_desc_put(netcp->rx_pool, desc);
+			dev_kfree_skb(skb);
+			return 0;
+		}
+	}
+	/* Free the primary descriptor */
+	knav_pool_desc_put(netcp->rx_pool, desc);
+
+	u64_stats_update_begin(&rx_stats->syncp_rx);
+	rx_stats->rx_packets++;
+	rx_stats->rx_bytes += skb->len;
+	u64_stats_update_end(&rx_stats->syncp_rx);
+
+	/* push skb up the stack */
+	skb->protocol = eth_type_trans(skb, netcp->ndev);
+	netif_receive_skb(skb);
+	return 0;
+
+free_desc:
+	netcp_free_rx_desc_chain(netcp, desc);
+	rx_stats->rx_errors++;
+	return 0;
+}
+
+static int netcp_process_rx_packets(struct netcp_intf *netcp,
+				    unsigned int budget)
+{
+	int i;
+
+	for (i = 0; (i < budget) && !netcp_process_one_rx_packet(netcp); i++)
+		;
+	return i;
+}
+
+/* Release descriptors and attached buffers from Rx FDQ */
+static void netcp_free_rx_buf(struct netcp_intf *netcp, int fdq)
+{
+	struct knav_dma_desc *desc;
+	unsigned int buf_len, dma_sz;
+	dma_addr_t dma;
+	void *buf_ptr;
+
+	/* Allocate descriptor */
+	while ((dma = knav_queue_pop(netcp->rx_fdq[fdq], &dma_sz))) {
+		desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);
+		if (unlikely(!desc)) {
+			dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
+			continue;
+		}
+
+		get_org_pkt_info(&dma, &buf_len, desc);
+		/* warning!!!! We are retrieving the virtual ptr in the sw_data
+		 * field as a 32bit value. Will not work on 64bit machines
+		 */
+		buf_ptr = (void *)GET_SW_DATA0(desc);
+
+		if (unlikely(!dma)) {
+			dev_err(netcp->ndev_dev, "NULL orig_buff in desc\n");
+			knav_pool_desc_put(netcp->rx_pool, desc);
+			continue;
+		}
+
+		if (unlikely(!buf_ptr)) {
+			dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");
+			knav_pool_desc_put(netcp->rx_pool, desc);
+			continue;
+		}
+
+		if (fdq == 0) {
+			dma_unmap_single(netcp->dev, dma, buf_len,
+					 DMA_FROM_DEVICE);
+			netcp_frag_free((buf_len <= PAGE_SIZE), buf_ptr);
+		} else {
+			dma_unmap_page(netcp->dev, dma, buf_len,
+				       DMA_FROM_DEVICE);
+			__free_page(buf_ptr);
+		}
+
+		knav_pool_desc_put(netcp->rx_pool, desc);
+	}
+}
+
+static void netcp_rxpool_free(struct netcp_intf *netcp)
+{
+	int i;
+
+	for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
+	     !IS_ERR_OR_NULL(netcp->rx_fdq[i]); i++)
+		netcp_free_rx_buf(netcp, i);
+
+	if (knav_pool_count(netcp->rx_pool) != netcp->rx_pool_size)
+		dev_err(netcp->ndev_dev, "Lost Rx (%d) descriptors\n",
+			netcp->rx_pool_size - knav_pool_count(netcp->rx_pool));
+
+	knav_pool_destroy(netcp->rx_pool);
+	netcp->rx_pool = NULL;
+}
+
+static int netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq)
+{
+	struct knav_dma_desc *hwdesc;
+	unsigned int buf_len, dma_sz;
+	u32 desc_info, pkt_info;
+	struct page *page;
+	dma_addr_t dma;
+	void *bufptr;
+	u32 sw_data[2];
+
+	/* Allocate descriptor */
+	hwdesc = knav_pool_desc_get(netcp->rx_pool);
+	if (IS_ERR_OR_NULL(hwdesc)) {
+		dev_dbg(netcp->ndev_dev, "out of rx pool desc\n");
+		return -ENOMEM;
+	}
+
+	if (likely(fdq == 0)) {
+		unsigned int primary_buf_len;
+		/* Allocate a primary receive queue entry */
+		buf_len = NETCP_PACKET_SIZE + NETCP_SOP_OFFSET;
+		primary_buf_len = SKB_DATA_ALIGN(buf_len) +
+				SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+
+		bufptr = netdev_alloc_frag(primary_buf_len);
+		sw_data[1] = primary_buf_len;
+
+		if (unlikely(!bufptr)) {
+			dev_warn_ratelimited(netcp->ndev_dev,
+					     "Primary RX buffer alloc failed\n");
+			goto fail;
+		}
+		dma = dma_map_single(netcp->dev, bufptr, buf_len,
+				     DMA_TO_DEVICE);
+		if (unlikely(dma_mapping_error(netcp->dev, dma)))
+			goto fail;
+
+		/* warning!!!! We are saving the virtual ptr in the sw_data
+		 * field as a 32bit value. Will not work on 64bit machines
+		 */
+		sw_data[0] = (u32)bufptr;
+	} else {
+		/* Allocate a secondary receive queue entry */
+		page = alloc_page(GFP_ATOMIC | GFP_DMA);
+		if (unlikely(!page)) {
+			dev_warn_ratelimited(netcp->ndev_dev, "Secondary page alloc failed\n");
+			goto fail;
+		}
+		buf_len = PAGE_SIZE;
+		dma = dma_map_page(netcp->dev, page, 0, buf_len, DMA_TO_DEVICE);
+		/* warning!!!! We are saving the virtual ptr in the sw_data
+		 * field as a 32bit value. Will not work on 64bit machines
+		 */
+		sw_data[0] = (u32)page;
+		sw_data[1] = 0;
+	}
+
+	desc_info =  KNAV_DMA_DESC_PS_INFO_IN_DESC;
+	desc_info |= buf_len & KNAV_DMA_DESC_PKT_LEN_MASK;
+	pkt_info =  KNAV_DMA_DESC_HAS_EPIB;
+	pkt_info |= KNAV_DMA_NUM_PS_WORDS << KNAV_DMA_DESC_PSLEN_SHIFT;
+	pkt_info |= (netcp->rx_queue_id & KNAV_DMA_DESC_RETQ_MASK) <<
+		    KNAV_DMA_DESC_RETQ_SHIFT;
+	set_org_pkt_info(dma, buf_len, hwdesc);
+	SET_SW_DATA0(sw_data[0], hwdesc);
+	SET_SW_DATA1(sw_data[1], hwdesc);
+	set_desc_info(desc_info, pkt_info, hwdesc);
+
+	/* Push to FDQs */
+	knav_pool_desc_map(netcp->rx_pool, hwdesc, sizeof(*hwdesc), &dma,
+			   &dma_sz);
+	knav_queue_push(netcp->rx_fdq[fdq], dma, sizeof(*hwdesc), 0);
+	return 0;
+
+fail:
+	knav_pool_desc_put(netcp->rx_pool, hwdesc);
+	return -ENOMEM;
+}
+
+/* Refill Rx FDQ with descriptors & attached buffers */
+static void netcp_rxpool_refill(struct netcp_intf *netcp)
+{
+	u32 fdq_deficit[KNAV_DMA_FDQ_PER_CHAN] = {0};
+	int i, ret = 0;
+
+	/* Calculate the FDQ deficit and refill */
+	for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_fdq[i]; i++) {
+		fdq_deficit[i] = netcp->rx_queue_depths[i] -
+				 knav_queue_get_count(netcp->rx_fdq[i]);
+
+		while (fdq_deficit[i]-- && !ret)
+			ret = netcp_allocate_rx_buf(netcp, i);
+	} /* end for fdqs */
+}
+
+/* NAPI poll */
+static int netcp_rx_poll(struct napi_struct *napi, int budget)
+{
+	struct netcp_intf *netcp = container_of(napi, struct netcp_intf,
+						rx_napi);
+	unsigned int packets;
+
+	packets = netcp_process_rx_packets(netcp, budget);
+
+	netcp_rxpool_refill(netcp);
+	if (packets < budget) {
+		napi_complete_done(&netcp->rx_napi, packets);
+		knav_queue_enable_notify(netcp->rx_queue);
+	}
+
+	return packets;
+}
+
+static void netcp_rx_notify(void *arg)
+{
+	struct netcp_intf *netcp = arg;
+
+	knav_queue_disable_notify(netcp->rx_queue);
+	napi_schedule(&netcp->rx_napi);
+}
+
+static void netcp_free_tx_desc_chain(struct netcp_intf *netcp,
+				     struct knav_dma_desc *desc,
+				     unsigned int desc_sz)
+{
+	struct knav_dma_desc *ndesc = desc;
+	dma_addr_t dma_desc, dma_buf;
+	unsigned int buf_len;
+
+	while (ndesc) {
+		get_pkt_info(&dma_buf, &buf_len, &dma_desc, ndesc);
+
+		if (dma_buf && buf_len)
+			dma_unmap_single(netcp->dev, dma_buf, buf_len,
+					 DMA_TO_DEVICE);
+		else
+			dev_warn(netcp->ndev_dev, "bad Tx desc buf(%pad), len(%d)\n",
+				 &dma_buf, buf_len);
+
+		knav_pool_desc_put(netcp->tx_pool, ndesc);
+		ndesc = NULL;
+		if (dma_desc) {
+			ndesc = knav_pool_desc_unmap(netcp->tx_pool, dma_desc,
+						     desc_sz);
+			if (!ndesc)
+				dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");
+		}
+	}
+}
+
+static int netcp_process_tx_compl_packets(struct netcp_intf *netcp,
+					  unsigned int budget)
+{
+	struct netcp_stats *tx_stats = &netcp->stats;
+	struct knav_dma_desc *desc;
+	struct netcp_tx_cb *tx_cb;
+	struct sk_buff *skb;
+	unsigned int dma_sz;
+	dma_addr_t dma;
+	int pkts = 0;
+
+	while (budget--) {
+		dma = knav_queue_pop(netcp->tx_compl_q, &dma_sz);
+		if (!dma)
+			break;
+		desc = knav_pool_desc_unmap(netcp->tx_pool, dma, dma_sz);
+		if (unlikely(!desc)) {
+			dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");
+			tx_stats->tx_errors++;
+			continue;
+		}
+
+		/* warning!!!! We are retrieving the virtual ptr in the sw_data
+		 * field as a 32bit value. Will not work on 64bit machines
+		 */
+		skb = (struct sk_buff *)GET_SW_DATA0(desc);
+		netcp_free_tx_desc_chain(netcp, desc, dma_sz);
+		if (!skb) {
+			dev_err(netcp->ndev_dev, "No skb in Tx desc\n");
+			tx_stats->tx_errors++;
+			continue;
+		}
+
+		tx_cb = (struct netcp_tx_cb *)skb->cb;
+		if (tx_cb->txtstamp)
+			tx_cb->txtstamp(tx_cb->ts_context, skb);
+
+		if (netif_subqueue_stopped(netcp->ndev, skb) &&
+		    netif_running(netcp->ndev) &&
+		    (knav_pool_count(netcp->tx_pool) >
+		    netcp->tx_resume_threshold)) {
+			u16 subqueue = skb_get_queue_mapping(skb);
+
+			netif_wake_subqueue(netcp->ndev, subqueue);
+		}
+
+		u64_stats_update_begin(&tx_stats->syncp_tx);
+		tx_stats->tx_packets++;
+		tx_stats->tx_bytes += skb->len;
+		u64_stats_update_end(&tx_stats->syncp_tx);
+		dev_kfree_skb(skb);
+		pkts++;
+	}
+	return pkts;
+}
+
+static int netcp_tx_poll(struct napi_struct *napi, int budget)
+{
+	int packets;
+	struct netcp_intf *netcp = container_of(napi, struct netcp_intf,
+						tx_napi);
+
+	packets = netcp_process_tx_compl_packets(netcp, budget);
+	if (packets < budget) {
+		napi_complete(&netcp->tx_napi);
+		knav_queue_enable_notify(netcp->tx_compl_q);
+	}
+
+	return packets;
+}
+
+static void netcp_tx_notify(void *arg)
+{
+	struct netcp_intf *netcp = arg;
+
+	knav_queue_disable_notify(netcp->tx_compl_q);
+	napi_schedule(&netcp->tx_napi);
+}
+
+static struct knav_dma_desc*
+netcp_tx_map_skb(struct sk_buff *skb, struct netcp_intf *netcp)
+{
+	struct knav_dma_desc *desc, *ndesc, *pdesc;
+	unsigned int pkt_len = skb_headlen(skb);
+	struct device *dev = netcp->dev;
+	dma_addr_t dma_addr;
+	unsigned int dma_sz;
+	int i;
+
+	/* Map the linear buffer */
+	dma_addr = dma_map_single(dev, skb->data, pkt_len, DMA_TO_DEVICE);
+	if (unlikely(dma_mapping_error(dev, dma_addr))) {
+		dev_err(netcp->ndev_dev, "Failed to map skb buffer\n");
+		return NULL;
+	}
+
+	desc = knav_pool_desc_get(netcp->tx_pool);
+	if (IS_ERR_OR_NULL(desc)) {
+		dev_err(netcp->ndev_dev, "out of TX desc\n");
+		dma_unmap_single(dev, dma_addr, pkt_len, DMA_TO_DEVICE);
+		return NULL;
+	}
+
+	set_pkt_info(dma_addr, pkt_len, 0, desc);
+	if (skb_is_nonlinear(skb)) {
+		prefetchw(skb_shinfo(skb));
+	} else {
+		desc->next_desc = 0;
+		goto upd_pkt_len;
+	}
+
+	pdesc = desc;
+
+	/* Handle the case where skb is fragmented in pages */
+	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+		struct page *page = skb_frag_page(frag);
+		u32 page_offset = skb_frag_off(frag);
+		u32 buf_len = skb_frag_size(frag);
+		dma_addr_t desc_dma;
+		u32 desc_dma_32;
+
+		dma_addr = dma_map_page(dev, page, page_offset, buf_len,
+					DMA_TO_DEVICE);
+		if (unlikely(!dma_addr)) {
+			dev_err(netcp->ndev_dev, "Failed to map skb page\n");
+			goto free_descs;
+		}
+
+		ndesc = knav_pool_desc_get(netcp->tx_pool);
+		if (IS_ERR_OR_NULL(ndesc)) {
+			dev_err(netcp->ndev_dev, "out of TX desc for frags\n");
+			dma_unmap_page(dev, dma_addr, buf_len, DMA_TO_DEVICE);
+			goto free_descs;
+		}
+
+		desc_dma = knav_pool_desc_virt_to_dma(netcp->tx_pool, ndesc);
+		set_pkt_info(dma_addr, buf_len, 0, ndesc);
+		desc_dma_32 = (u32)desc_dma;
+		set_words(&desc_dma_32, 1, &pdesc->next_desc);
+		pkt_len += buf_len;
+		if (pdesc != desc)
+			knav_pool_desc_map(netcp->tx_pool, pdesc,
+					   sizeof(*pdesc), &desc_dma, &dma_sz);
+		pdesc = ndesc;
+	}
+	if (pdesc != desc)
+		knav_pool_desc_map(netcp->tx_pool, pdesc, sizeof(*pdesc),
+				   &dma_addr, &dma_sz);
+
+	/* frag list based linkage is not supported for now. */
+	if (skb_shinfo(skb)->frag_list) {
+		dev_err_ratelimited(netcp->ndev_dev, "NETIF_F_FRAGLIST not supported\n");
+		goto free_descs;
+	}
+
+upd_pkt_len:
+	WARN_ON(pkt_len != skb->len);
+
+	pkt_len &= KNAV_DMA_DESC_PKT_LEN_MASK;
+	set_words(&pkt_len, 1, &desc->desc_info);
+	return desc;
+
+free_descs:
+	netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));
+	return NULL;
+}
+
+static int netcp_tx_submit_skb(struct netcp_intf *netcp,
+			       struct sk_buff *skb,
+			       struct knav_dma_desc *desc)
+{
+	struct netcp_tx_pipe *tx_pipe = NULL;
+	struct netcp_hook_list *tx_hook;
+	struct netcp_packet p_info;
+	struct netcp_tx_cb *tx_cb;
+	unsigned int dma_sz;
+	dma_addr_t dma;
+	u32 tmp = 0;
+	int ret = 0;
+
+	p_info.netcp = netcp;
+	p_info.skb = skb;
+	p_info.tx_pipe = NULL;
+	p_info.psdata_len = 0;
+	p_info.ts_context = NULL;
+	p_info.txtstamp = NULL;
+	p_info.epib = desc->epib;
+	p_info.psdata = (u32 __force *)desc->psdata;
+	memset(p_info.epib, 0, KNAV_DMA_NUM_EPIB_WORDS * sizeof(__le32));
+
+	/* Find out where to inject the packet for transmission */
+	list_for_each_entry(tx_hook, &netcp->txhook_list_head, list) {
+		ret = tx_hook->hook_rtn(tx_hook->order, tx_hook->hook_data,
+					&p_info);
+		if (unlikely(ret != 0)) {
+			dev_err(netcp->ndev_dev, "TX hook %d rejected the packet with reason(%d)\n",
+				tx_hook->order, ret);
+			ret = (ret < 0) ? ret : NETDEV_TX_OK;
+			goto out;
+		}
+	}
+
+	/* Make sure some TX hook claimed the packet */
+	tx_pipe = p_info.tx_pipe;
+	if (!tx_pipe) {
+		dev_err(netcp->ndev_dev, "No TX hook claimed the packet!\n");
+		ret = -ENXIO;
+		goto out;
+	}
+
+	tx_cb = (struct netcp_tx_cb *)skb->cb;
+	tx_cb->ts_context = p_info.ts_context;
+	tx_cb->txtstamp = p_info.txtstamp;
+
+	/* update descriptor */
+	if (p_info.psdata_len) {
+		/* psdata points to both native-endian and device-endian data */
+		__le32 *psdata = (void __force *)p_info.psdata;
+
+		set_words((u32 *)psdata +
+			  (KNAV_DMA_NUM_PS_WORDS - p_info.psdata_len),
+			  p_info.psdata_len, psdata);
+		tmp |= (p_info.psdata_len & KNAV_DMA_DESC_PSLEN_MASK) <<
+			KNAV_DMA_DESC_PSLEN_SHIFT;
+	}
+
+	tmp |= KNAV_DMA_DESC_HAS_EPIB |
+		((netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) <<
+		KNAV_DMA_DESC_RETQ_SHIFT);
+
+	if (!(tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO)) {
+		tmp |= ((tx_pipe->switch_to_port & KNAV_DMA_DESC_PSFLAG_MASK) <<
+			KNAV_DMA_DESC_PSFLAG_SHIFT);
+	}
+
+	set_words(&tmp, 1, &desc->packet_info);
+	/* warning!!!! We are saving the virtual ptr in the sw_data
+	 * field as a 32bit value. Will not work on 64bit machines
+	 */
+	SET_SW_DATA0((u32)skb, desc);
+
+	if (tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO) {
+		tmp = tx_pipe->switch_to_port;
+		set_words(&tmp, 1, &desc->tag_info);
+	}
+
+	/* submit packet descriptor */
+	ret = knav_pool_desc_map(netcp->tx_pool, desc, sizeof(*desc), &dma,
+				 &dma_sz);
+	if (unlikely(ret)) {
+		dev_err(netcp->ndev_dev, "%s() failed to map desc\n", __func__);
+		ret = -ENOMEM;
+		goto out;
+	}
+	skb_tx_timestamp(skb);
+	knav_queue_push(tx_pipe->dma_queue, dma, dma_sz, 0);
+
+out:
+	return ret;
+}
+
+/* Submit the packet */
+static netdev_tx_t netcp_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+	struct netcp_intf *netcp = netdev_priv(ndev);
+	struct netcp_stats *tx_stats = &netcp->stats;
+	int subqueue = skb_get_queue_mapping(skb);
+	struct knav_dma_desc *desc;
+	int desc_count, ret = 0;
+
+	if (unlikely(skb->len <= 0)) {
+		dev_kfree_skb(skb);
+		return NETDEV_TX_OK;
+	}
+
+	if (unlikely(skb->len < NETCP_MIN_PACKET_SIZE)) {
+		ret = skb_padto(skb, NETCP_MIN_PACKET_SIZE);
+		if (ret < 0) {
+			/* If we get here, the skb has already been dropped */
+			dev_warn(netcp->ndev_dev, "padding failed (%d), packet dropped\n",
+				 ret);
+			tx_stats->tx_dropped++;
+			return ret;
+		}
+		skb->len = NETCP_MIN_PACKET_SIZE;
+	}
+
+	desc = netcp_tx_map_skb(skb, netcp);
+	if (unlikely(!desc)) {
+		netif_stop_subqueue(ndev, subqueue);
+		ret = -ENOBUFS;
+		goto drop;
+	}
+
+	ret = netcp_tx_submit_skb(netcp, skb, desc);
+	if (ret)
+		goto drop;
+
+	/* Check Tx pool count & stop subqueue if needed */
+	desc_count = knav_pool_count(netcp->tx_pool);
+	if (desc_count < netcp->tx_pause_threshold) {
+		dev_dbg(netcp->ndev_dev, "pausing tx, count(%d)\n", desc_count);
+		netif_stop_subqueue(ndev, subqueue);
+	}
+	return NETDEV_TX_OK;
+
+drop:
+	tx_stats->tx_dropped++;
+	if (desc)
+		netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));
+	dev_kfree_skb(skb);
+	return ret;
+}
+
+int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe)
+{
+	if (tx_pipe->dma_channel) {
+		knav_dma_close_channel(tx_pipe->dma_channel);
+		tx_pipe->dma_channel = NULL;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(netcp_txpipe_close);
+
+int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe)
+{
+	struct device *dev = tx_pipe->netcp_device->device;
+	struct knav_dma_cfg config;
+	int ret = 0;
+	u8 name[16];
+
+	memset(&config, 0, sizeof(config));
+	config.direction = DMA_MEM_TO_DEV;
+	config.u.tx.filt_einfo = false;
+	config.u.tx.filt_pswords = false;
+	config.u.tx.priority = DMA_PRIO_MED_L;
+
+	tx_pipe->dma_channel = knav_dma_open_channel(dev,
+				tx_pipe->dma_chan_name, &config);
+	if (IS_ERR(tx_pipe->dma_channel)) {
+		dev_err(dev, "failed opening tx chan(%s)\n",
+			tx_pipe->dma_chan_name);
+		ret = PTR_ERR(tx_pipe->dma_channel);
+		goto err;
+	}
+
+	snprintf(name, sizeof(name), "tx-pipe-%s", dev_name(dev));
+	tx_pipe->dma_queue = knav_queue_open(name, tx_pipe->dma_queue_id,
+					     KNAV_QUEUE_SHARED);
+	if (IS_ERR(tx_pipe->dma_queue)) {
+		dev_err(dev, "Could not open DMA queue for channel \"%s\": %pe\n",
+			name, tx_pipe->dma_queue);
+		ret = PTR_ERR(tx_pipe->dma_queue);
+		goto err;
+	}
+
+	dev_dbg(dev, "opened tx pipe %s\n", name);
+	return 0;
+
+err:
+	if (!IS_ERR_OR_NULL(tx_pipe->dma_channel))
+		knav_dma_close_channel(tx_pipe->dma_channel);
+	tx_pipe->dma_channel = NULL;
+	return ret;
+}
+EXPORT_SYMBOL_GPL(netcp_txpipe_open);
+
+int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe,
+		      struct netcp_device *netcp_device,
+		      const char *dma_chan_name, unsigned int dma_queue_id)
+{
+	memset(tx_pipe, 0, sizeof(*tx_pipe));
+	tx_pipe->netcp_device = netcp_device;
+	tx_pipe->dma_chan_name = dma_chan_name;
+	tx_pipe->dma_queue_id = dma_queue_id;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(netcp_txpipe_init);
+
+static struct netcp_addr *netcp_addr_find(struct netcp_intf *netcp,
+					  const u8 *addr,
+					  enum netcp_addr_type type)
+{
+	struct netcp_addr *naddr;
+
+	list_for_each_entry(naddr, &netcp->addr_list, node) {
+		if (naddr->type != type)
+			continue;
+		if (addr && memcmp(addr, naddr->addr, ETH_ALEN))
+			continue;
+		return naddr;
+	}
+
+	return NULL;
+}
+
+static struct netcp_addr *netcp_addr_add(struct netcp_intf *netcp,
+					 const u8 *addr,
+					 enum netcp_addr_type type)
+{
+	struct netcp_addr *naddr;
+
+	naddr = devm_kmalloc(netcp->dev, sizeof(*naddr), GFP_ATOMIC);
+	if (!naddr)
+		return NULL;
+
+	naddr->type = type;
+	naddr->flags = 0;
+	naddr->netcp = netcp;
+	if (addr)
+		ether_addr_copy(naddr->addr, addr);
+	else
+		eth_zero_addr(naddr->addr);
+	list_add_tail(&naddr->node, &netcp->addr_list);
+
+	return naddr;
+}
+
+static void netcp_addr_del(struct netcp_intf *netcp, struct netcp_addr *naddr)
+{
+	list_del(&naddr->node);
+	devm_kfree(netcp->dev, naddr);
+}
+
+static void netcp_addr_clear_mark(struct netcp_intf *netcp)
+{
+	struct netcp_addr *naddr;
+
+	list_for_each_entry(naddr, &netcp->addr_list, node)
+		naddr->flags = 0;
+}
+
+static void netcp_addr_add_mark(struct netcp_intf *netcp, const u8 *addr,
+				enum netcp_addr_type type)
+{
+	struct netcp_addr *naddr;
+
+	naddr = netcp_addr_find(netcp, addr, type);
+	if (naddr) {
+		naddr->flags |= ADDR_VALID;
+		return;
+	}
+
+	naddr = netcp_addr_add(netcp, addr, type);
+	if (!WARN_ON(!naddr))
+		naddr->flags |= ADDR_NEW;
+}
+
+static void netcp_addr_sweep_del(struct netcp_intf *netcp)
+{
+	struct netcp_addr *naddr, *tmp;
+	struct netcp_intf_modpriv *priv;
+	struct netcp_module *module;
+	int error;
+
+	list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {
+		if (naddr->flags & (ADDR_VALID | ADDR_NEW))
+			continue;
+		dev_dbg(netcp->ndev_dev, "deleting address %pM, type %x\n",
+			naddr->addr, naddr->type);
+		for_each_module(netcp, priv) {
+			module = priv->netcp_module;
+			if (!module->del_addr)
+				continue;
+			error = module->del_addr(priv->module_priv,
+						 naddr);
+			WARN_ON(error);
+		}
+		netcp_addr_del(netcp, naddr);
+	}
+}
+
+static void netcp_addr_sweep_add(struct netcp_intf *netcp)
+{
+	struct netcp_addr *naddr, *tmp;
+	struct netcp_intf_modpriv *priv;
+	struct netcp_module *module;
+	int error;
+
+	list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {
+		if (!(naddr->flags & ADDR_NEW))
+			continue;
+		dev_dbg(netcp->ndev_dev, "adding address %pM, type %x\n",
+			naddr->addr, naddr->type);
+
+		for_each_module(netcp, priv) {
+			module = priv->netcp_module;
+			if (!module->add_addr)
+				continue;
+			error = module->add_addr(priv->module_priv, naddr);
+			WARN_ON(error);
+		}
+	}
+}
+
+static int netcp_set_promiscuous(struct netcp_intf *netcp, bool promisc)
+{
+	struct netcp_intf_modpriv *priv;
+	struct netcp_module *module;
+	int error;
+
+	for_each_module(netcp, priv) {
+		module = priv->netcp_module;
+		if (!module->set_rx_mode)
+			continue;
+
+		error = module->set_rx_mode(priv->module_priv, promisc);
+		if (error)
+			return error;
+	}
+	return 0;
+}
+
+static void netcp_set_rx_mode(struct net_device *ndev)
+{
+	struct netcp_intf *netcp = netdev_priv(ndev);
+	struct netdev_hw_addr *ndev_addr;
+	bool promisc;
+
+	promisc = (ndev->flags & IFF_PROMISC ||
+		   ndev->flags & IFF_ALLMULTI ||
+		   netdev_mc_count(ndev) > NETCP_MAX_MCAST_ADDR);
+
+	spin_lock(&netcp->lock);
+	/* first clear all marks */
+	netcp_addr_clear_mark(netcp);
+
+	/* next add new entries, mark existing ones */
+	netcp_addr_add_mark(netcp, ndev->broadcast, ADDR_BCAST);
+	for_each_dev_addr(ndev, ndev_addr)
+		netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_DEV);
+	netdev_for_each_uc_addr(ndev_addr, ndev)
+		netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_UCAST);
+	netdev_for_each_mc_addr(ndev_addr, ndev)
+		netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_MCAST);
+
+	if (promisc)
+		netcp_addr_add_mark(netcp, NULL, ADDR_ANY);
+
+	/* finally sweep and callout into modules */
+	netcp_addr_sweep_del(netcp);
+	netcp_addr_sweep_add(netcp);
+	netcp_set_promiscuous(netcp, promisc);
+	spin_unlock(&netcp->lock);
+}
+
+static void netcp_free_navigator_resources(struct netcp_intf *netcp)
+{
+	int i;
+
+	if (netcp->rx_channel) {
+		knav_dma_close_channel(netcp->rx_channel);
+		netcp->rx_channel = NULL;
+	}
+
+	if (!IS_ERR_OR_NULL(netcp->rx_pool))
+		netcp_rxpool_free(netcp);
+
+	if (!IS_ERR_OR_NULL(netcp->rx_queue)) {
+		knav_queue_close(netcp->rx_queue);
+		netcp->rx_queue = NULL;
+	}
+
+	for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
+	     !IS_ERR_OR_NULL(netcp->rx_fdq[i]) ; ++i) {
+		knav_queue_close(netcp->rx_fdq[i]);
+		netcp->rx_fdq[i] = NULL;
+	}
+
+	if (!IS_ERR_OR_NULL(netcp->tx_compl_q)) {
+		knav_queue_close(netcp->tx_compl_q);
+		netcp->tx_compl_q = NULL;
+	}
+
+	if (!IS_ERR_OR_NULL(netcp->tx_pool)) {
+		knav_pool_destroy(netcp->tx_pool);
+		netcp->tx_pool = NULL;
+	}
+}
+
+static int netcp_setup_navigator_resources(struct net_device *ndev)
+{
+	struct netcp_intf *netcp = netdev_priv(ndev);
+	struct knav_queue_notify_config notify_cfg;
+	struct knav_dma_cfg config;
+	u32 last_fdq = 0;
+	u8 name[16];
+	int ret;
+	int i;
+
+	/* Create Rx/Tx descriptor pools */
+	snprintf(name, sizeof(name), "rx-pool-%s", ndev->name);
+	netcp->rx_pool = knav_pool_create(name, netcp->rx_pool_size,
+						netcp->rx_pool_region_id);
+	if (IS_ERR_OR_NULL(netcp->rx_pool)) {
+		dev_err(netcp->ndev_dev, "Couldn't create rx pool\n");
+		ret = PTR_ERR(netcp->rx_pool);
+		goto fail;
+	}
+
+	snprintf(name, sizeof(name), "tx-pool-%s", ndev->name);
+	netcp->tx_pool = knav_pool_create(name, netcp->tx_pool_size,
+						netcp->tx_pool_region_id);
+	if (IS_ERR_OR_NULL(netcp->tx_pool)) {
+		dev_err(netcp->ndev_dev, "Couldn't create tx pool\n");
+		ret = PTR_ERR(netcp->tx_pool);
+		goto fail;
+	}
+
+	/* open Tx completion queue */
+	snprintf(name, sizeof(name), "tx-compl-%s", ndev->name);
+	netcp->tx_compl_q = knav_queue_open(name, netcp->tx_compl_qid, 0);
+	if (IS_ERR(netcp->tx_compl_q)) {
+		ret = PTR_ERR(netcp->tx_compl_q);
+		goto fail;
+	}
+	netcp->tx_compl_qid = knav_queue_get_id(netcp->tx_compl_q);
+
+	/* Set notification for Tx completion */
+	notify_cfg.fn = netcp_tx_notify;
+	notify_cfg.fn_arg = netcp;
+	ret = knav_queue_device_control(netcp->tx_compl_q,
+					KNAV_QUEUE_SET_NOTIFIER,
+					(unsigned long)&notify_cfg);
+	if (ret)
+		goto fail;
+
+	knav_queue_disable_notify(netcp->tx_compl_q);
+
+	/* open Rx completion queue */
+	snprintf(name, sizeof(name), "rx-compl-%s", ndev->name);
+	netcp->rx_queue = knav_queue_open(name, netcp->rx_queue_id, 0);
+	if (IS_ERR(netcp->rx_queue)) {
+		ret = PTR_ERR(netcp->rx_queue);
+		goto fail;
+	}
+	netcp->rx_queue_id = knav_queue_get_id(netcp->rx_queue);
+
+	/* Set notification for Rx completion */
+	notify_cfg.fn = netcp_rx_notify;
+	notify_cfg.fn_arg = netcp;
+	ret = knav_queue_device_control(netcp->rx_queue,
+					KNAV_QUEUE_SET_NOTIFIER,
+					(unsigned long)&notify_cfg);
+	if (ret)
+		goto fail;
+
+	knav_queue_disable_notify(netcp->rx_queue);
+
+	/* open Rx FDQs */
+	for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_queue_depths[i];
+	     ++i) {
+		snprintf(name, sizeof(name), "rx-fdq-%s-%d", ndev->name, i);
+		netcp->rx_fdq[i] = knav_queue_open(name, KNAV_QUEUE_GP, 0);
+		if (IS_ERR(netcp->rx_fdq[i])) {
+			ret = PTR_ERR(netcp->rx_fdq[i]);
+			goto fail;
+		}
+	}
+
+	memset(&config, 0, sizeof(config));
+	config.direction		= DMA_DEV_TO_MEM;
+	config.u.rx.einfo_present	= true;
+	config.u.rx.psinfo_present	= true;
+	config.u.rx.err_mode		= DMA_DROP;
+	config.u.rx.desc_type		= DMA_DESC_HOST;
+	config.u.rx.psinfo_at_sop	= false;
+	config.u.rx.sop_offset		= NETCP_SOP_OFFSET;
+	config.u.rx.dst_q		= netcp->rx_queue_id;
+	config.u.rx.thresh		= DMA_THRESH_NONE;
+
+	for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN; ++i) {
+		if (netcp->rx_fdq[i])
+			last_fdq = knav_queue_get_id(netcp->rx_fdq[i]);
+		config.u.rx.fdq[i] = last_fdq;
+	}
+
+	netcp->rx_channel = knav_dma_open_channel(netcp->netcp_device->device,
+					netcp->dma_chan_name, &config);
+	if (IS_ERR(netcp->rx_channel)) {
+		dev_err(netcp->ndev_dev, "failed opening rx chan(%s\n",
+			netcp->dma_chan_name);
+		ret = PTR_ERR(netcp->rx_channel);
+		goto fail;
+	}
+
+	dev_dbg(netcp->ndev_dev, "opened RX channel: %p\n", netcp->rx_channel);
+	return 0;
+
+fail:
+	netcp_free_navigator_resources(netcp);
+	return ret;
+}
+
+/* Open the device */
+static int netcp_ndo_open(struct net_device *ndev)
+{
+	struct netcp_intf *netcp = netdev_priv(ndev);
+	struct netcp_intf_modpriv *intf_modpriv;
+	struct netcp_module *module;
+	int ret;
+
+	netif_carrier_off(ndev);
+	ret = netcp_setup_navigator_resources(ndev);
+	if (ret) {
+		dev_err(netcp->ndev_dev, "Failed to setup navigator resources\n");
+		goto fail;
+	}
+
+	for_each_module(netcp, intf_modpriv) {
+		module = intf_modpriv->netcp_module;
+		if (module->open) {
+			ret = module->open(intf_modpriv->module_priv, ndev);
+			if (ret != 0) {
+				dev_err(netcp->ndev_dev, "module open failed\n");
+				goto fail_open;
+			}
+		}
+	}
+
+	napi_enable(&netcp->rx_napi);
+	napi_enable(&netcp->tx_napi);
+	knav_queue_enable_notify(netcp->tx_compl_q);
+	knav_queue_enable_notify(netcp->rx_queue);
+	netcp_rxpool_refill(netcp);
+	netif_tx_wake_all_queues(ndev);
+	dev_dbg(netcp->ndev_dev, "netcp device %s opened\n", ndev->name);
+	return 0;
+
+fail_open:
+	for_each_module(netcp, intf_modpriv) {
+		module = intf_modpriv->netcp_module;
+		if (module->close)
+			module->close(intf_modpriv->module_priv, ndev);
+	}
+
+fail:
+	netcp_free_navigator_resources(netcp);
+	return ret;
+}
+
+/* Close the device */
+static int netcp_ndo_stop(struct net_device *ndev)
+{
+	struct netcp_intf *netcp = netdev_priv(ndev);
+	struct netcp_intf_modpriv *intf_modpriv;
+	struct netcp_module *module;
+	int err = 0;
+
+	netif_tx_stop_all_queues(ndev);
+	netif_carrier_off(ndev);
+	netcp_addr_clear_mark(netcp);
+	netcp_addr_sweep_del(netcp);
+	knav_queue_disable_notify(netcp->rx_queue);
+	knav_queue_disable_notify(netcp->tx_compl_q);
+	napi_disable(&netcp->rx_napi);
+	napi_disable(&netcp->tx_napi);
+
+	for_each_module(netcp, intf_modpriv) {
+		module = intf_modpriv->netcp_module;
+		if (module->close) {
+			err = module->close(intf_modpriv->module_priv, ndev);
+			if (err != 0)
+				dev_err(netcp->ndev_dev, "Close failed\n");
+		}
+	}
+
+	/* Recycle Rx descriptors from completion queue */
+	netcp_empty_rx_queue(netcp);
+
+	/* Recycle Tx descriptors from completion queue */
+	netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);
+
+	if (knav_pool_count(netcp->tx_pool) != netcp->tx_pool_size)
+		dev_err(netcp->ndev_dev, "Lost (%d) Tx descs\n",
+			netcp->tx_pool_size - knav_pool_count(netcp->tx_pool));
+
+	netcp_free_navigator_resources(netcp);
+	dev_dbg(netcp->ndev_dev, "netcp device %s stopped\n", ndev->name);
+	return 0;
+}
+
+static int netcp_ndo_ioctl(struct net_device *ndev,
+			   struct ifreq *req, int cmd)
+{
+	struct netcp_intf *netcp = netdev_priv(ndev);
+	struct netcp_intf_modpriv *intf_modpriv;
+	struct netcp_module *module;
+	int ret = -1, err = -EOPNOTSUPP;
+
+	if (!netif_running(ndev))
+		return -EINVAL;
+
+	for_each_module(netcp, intf_modpriv) {
+		module = intf_modpriv->netcp_module;
+		if (!module->ioctl)
+			continue;
+
+		err = module->ioctl(intf_modpriv->module_priv, req, cmd);
+		if ((err < 0) && (err != -EOPNOTSUPP)) {
+			ret = err;
+			goto out;
+		}
+		if (err == 0)
+			ret = err;
+	}
+
+out:
+	return (ret == 0) ? 0 : err;
+}
+
+static void netcp_ndo_tx_timeout(struct net_device *ndev, unsigned int txqueue)
+{
+	struct netcp_intf *netcp = netdev_priv(ndev);
+	unsigned int descs = knav_pool_count(netcp->tx_pool);
+
+	dev_err(netcp->ndev_dev, "transmit timed out tx descs(%d)\n", descs);
+	netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);
+	netif_trans_update(ndev);
+	netif_tx_wake_all_queues(ndev);
+}
+
+static int netcp_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid)
+{
+	struct netcp_intf *netcp = netdev_priv(ndev);
+	struct netcp_intf_modpriv *intf_modpriv;
+	struct netcp_module *module;
+	unsigned long flags;
+	int err = 0;
+
+	dev_dbg(netcp->ndev_dev, "adding rx vlan id: %d\n", vid);
+
+	spin_lock_irqsave(&netcp->lock, flags);
+	for_each_module(netcp, intf_modpriv) {
+		module = intf_modpriv->netcp_module;
+		if ((module->add_vid) && (vid != 0)) {
+			err = module->add_vid(intf_modpriv->module_priv, vid);
+			if (err != 0) {
+				dev_err(netcp->ndev_dev, "Could not add vlan id = %d\n",
+					vid);
+				break;
+			}
+		}
+	}
+	spin_unlock_irqrestore(&netcp->lock, flags);
+
+	return err;
+}
+
+static int netcp_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid)
+{
+	struct netcp_intf *netcp = netdev_priv(ndev);
+	struct netcp_intf_modpriv *intf_modpriv;
+	struct netcp_module *module;
+	unsigned long flags;
+	int err = 0;
+
+	dev_dbg(netcp->ndev_dev, "removing rx vlan id: %d\n", vid);
+
+	spin_lock_irqsave(&netcp->lock, flags);
+	for_each_module(netcp, intf_modpriv) {
+		module = intf_modpriv->netcp_module;
+		if (module->del_vid) {
+			err = module->del_vid(intf_modpriv->module_priv, vid);
+			if (err != 0) {
+				dev_err(netcp->ndev_dev, "Could not delete vlan id = %d\n",
+					vid);
+				break;
+			}
+		}
+	}
+	spin_unlock_irqrestore(&netcp->lock, flags);
+	return err;
+}
+
+static int netcp_setup_tc(struct net_device *dev, enum tc_setup_type type,
+			  void *type_data)
+{
+	struct tc_mqprio_qopt *mqprio = type_data;
+	u8 num_tc;
+	int i;
+
+	/* setup tc must be called under rtnl lock */
+	ASSERT_RTNL();
+
+	if (type != TC_SETUP_QDISC_MQPRIO)
+		return -EOPNOTSUPP;
+
+	mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
+	num_tc = mqprio->num_tc;
+
+	/* Sanity-check the number of traffic classes requested */
+	if ((dev->real_num_tx_queues <= 1) ||
+	    (dev->real_num_tx_queues < num_tc))
+		return -EINVAL;
+
+	/* Configure traffic class to queue mappings */
+	if (num_tc) {
+		netdev_set_num_tc(dev, num_tc);
+		for (i = 0; i < num_tc; i++)
+			netdev_set_tc_queue(dev, i, 1, i);
+	} else {
+		netdev_reset_tc(dev);
+	}
+
+	return 0;
+}
+
+static void
+netcp_get_stats(struct net_device *ndev, struct rtnl_link_stats64 *stats)
+{
+	struct netcp_intf *netcp = netdev_priv(ndev);
+	struct netcp_stats *p = &netcp->stats;
+	u64 rxpackets, rxbytes, txpackets, txbytes;
+	unsigned int start;
+
+	do {
+		start = u64_stats_fetch_begin_irq(&p->syncp_rx);
+		rxpackets       = p->rx_packets;
+		rxbytes         = p->rx_bytes;
+	} while (u64_stats_fetch_retry_irq(&p->syncp_rx, start));
+
+	do {
+		start = u64_stats_fetch_begin_irq(&p->syncp_tx);
+		txpackets       = p->tx_packets;
+		txbytes         = p->tx_bytes;
+	} while (u64_stats_fetch_retry_irq(&p->syncp_tx, start));
+
+	stats->rx_packets = rxpackets;
+	stats->rx_bytes = rxbytes;
+	stats->tx_packets = txpackets;
+	stats->tx_bytes = txbytes;
+
+	/* The following are stored as 32 bit */
+	stats->rx_errors = p->rx_errors;
+	stats->rx_dropped = p->rx_dropped;
+	stats->tx_dropped = p->tx_dropped;
+}
+
+static const struct net_device_ops netcp_netdev_ops = {
+	.ndo_open		= netcp_ndo_open,
+	.ndo_stop		= netcp_ndo_stop,
+	.ndo_start_xmit		= netcp_ndo_start_xmit,
+	.ndo_set_rx_mode	= netcp_set_rx_mode,
+	.ndo_eth_ioctl           = netcp_ndo_ioctl,
+	.ndo_get_stats64        = netcp_get_stats,
+	.ndo_set_mac_address	= eth_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_vlan_rx_add_vid	= netcp_rx_add_vid,
+	.ndo_vlan_rx_kill_vid	= netcp_rx_kill_vid,
+	.ndo_tx_timeout		= netcp_ndo_tx_timeout,
+	.ndo_select_queue	= dev_pick_tx_zero,
+	.ndo_setup_tc		= netcp_setup_tc,
+};
+
+static int netcp_create_interface(struct netcp_device *netcp_device,
+				  struct device_node *node_interface)
+{
+	struct device *dev = netcp_device->device;
+	struct device_node *node = dev->of_node;
+	struct netcp_intf *netcp;
+	struct net_device *ndev;
+	resource_size_t size;
+	struct resource res;
+	void __iomem *efuse = NULL;
+	u32 efuse_mac = 0;
+	u8 efuse_mac_addr[6];
+	u32 temp[2];
+	int ret = 0;
+
+	ndev = alloc_etherdev_mqs(sizeof(*netcp), 1, 1);
+	if (!ndev) {
+		dev_err(dev, "Error allocating netdev\n");
+		return -ENOMEM;
+	}
+
+	ndev->features |= NETIF_F_SG;
+	ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+	ndev->hw_features = ndev->features;
+	ndev->vlan_features |=  NETIF_F_SG;
+
+	/* MTU range: 68 - 9486 */
+	ndev->min_mtu = ETH_MIN_MTU;
+	ndev->max_mtu = NETCP_MAX_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
+
+	netcp = netdev_priv(ndev);
+	spin_lock_init(&netcp->lock);
+	INIT_LIST_HEAD(&netcp->module_head);
+	INIT_LIST_HEAD(&netcp->txhook_list_head);
+	INIT_LIST_HEAD(&netcp->rxhook_list_head);
+	INIT_LIST_HEAD(&netcp->addr_list);
+	u64_stats_init(&netcp->stats.syncp_rx);
+	u64_stats_init(&netcp->stats.syncp_tx);
+	netcp->netcp_device = netcp_device;
+	netcp->dev = netcp_device->device;
+	netcp->ndev = ndev;
+	netcp->ndev_dev  = &ndev->dev;
+	netcp->msg_enable = netif_msg_init(netcp_debug_level, NETCP_DEBUG);
+	netcp->tx_pause_threshold = MAX_SKB_FRAGS;
+	netcp->tx_resume_threshold = netcp->tx_pause_threshold;
+	netcp->node_interface = node_interface;
+
+	ret = of_property_read_u32(node_interface, "efuse-mac", &efuse_mac);
+	if (efuse_mac) {
+		if (of_address_to_resource(node, NETCP_EFUSE_REG_INDEX, &res)) {
+			dev_err(dev, "could not find efuse-mac reg resource\n");
+			ret = -ENODEV;
+			goto quit;
+		}
+		size = resource_size(&res);
+
+		if (!devm_request_mem_region(dev, res.start, size,
+					     dev_name(dev))) {
+			dev_err(dev, "could not reserve resource\n");
+			ret = -ENOMEM;
+			goto quit;
+		}
+
+		efuse = devm_ioremap(dev, res.start, size);
+		if (!efuse) {
+			dev_err(dev, "could not map resource\n");
+			devm_release_mem_region(dev, res.start, size);
+			ret = -ENOMEM;
+			goto quit;
+		}
+
+		emac_arch_get_mac_addr(efuse_mac_addr, efuse, efuse_mac);
+		if (is_valid_ether_addr(efuse_mac_addr))
+			eth_hw_addr_set(ndev, efuse_mac_addr);
+		else
+			eth_hw_addr_random(ndev);
+
+		devm_iounmap(dev, efuse);
+		devm_release_mem_region(dev, res.start, size);
+	} else {
+		ret = of_get_ethdev_address(node_interface, ndev);
+		if (ret)
+			eth_hw_addr_random(ndev);
+	}
+
+	ret = of_property_read_string(node_interface, "rx-channel",
+				      &netcp->dma_chan_name);
+	if (ret < 0) {
+		dev_err(dev, "missing \"rx-channel\" parameter\n");
+		ret = -ENODEV;
+		goto quit;
+	}
+
+	ret = of_property_read_u32(node_interface, "rx-queue",
+				   &netcp->rx_queue_id);
+	if (ret < 0) {
+		dev_warn(dev, "missing \"rx-queue\" parameter\n");
+		netcp->rx_queue_id = KNAV_QUEUE_QPEND;
+	}
+
+	ret = of_property_read_u32_array(node_interface, "rx-queue-depth",
+					 netcp->rx_queue_depths,
+					 KNAV_DMA_FDQ_PER_CHAN);
+	if (ret < 0) {
+		dev_err(dev, "missing \"rx-queue-depth\" parameter\n");
+		netcp->rx_queue_depths[0] = 128;
+	}
+
+	ret = of_property_read_u32_array(node_interface, "rx-pool", temp, 2);
+	if (ret < 0) {
+		dev_err(dev, "missing \"rx-pool\" parameter\n");
+		ret = -ENODEV;
+		goto quit;
+	}
+	netcp->rx_pool_size = temp[0];
+	netcp->rx_pool_region_id = temp[1];
+
+	ret = of_property_read_u32_array(node_interface, "tx-pool", temp, 2);
+	if (ret < 0) {
+		dev_err(dev, "missing \"tx-pool\" parameter\n");
+		ret = -ENODEV;
+		goto quit;
+	}
+	netcp->tx_pool_size = temp[0];
+	netcp->tx_pool_region_id = temp[1];
+
+	if (netcp->tx_pool_size < MAX_SKB_FRAGS) {
+		dev_err(dev, "tx-pool size too small, must be at least %ld\n",
+			MAX_SKB_FRAGS);
+		ret = -ENODEV;
+		goto quit;
+	}
+
+	ret = of_property_read_u32(node_interface, "tx-completion-queue",
+				   &netcp->tx_compl_qid);
+	if (ret < 0) {
+		dev_warn(dev, "missing \"tx-completion-queue\" parameter\n");
+		netcp->tx_compl_qid = KNAV_QUEUE_QPEND;
+	}
+
+	/* NAPI register */
+	netif_napi_add(ndev, &netcp->rx_napi, netcp_rx_poll);
+	netif_napi_add_tx(ndev, &netcp->tx_napi, netcp_tx_poll);
+
+	/* Register the network device */
+	ndev->dev_id		= 0;
+	ndev->watchdog_timeo	= NETCP_TX_TIMEOUT;
+	ndev->netdev_ops	= &netcp_netdev_ops;
+	SET_NETDEV_DEV(ndev, dev);
+
+	list_add_tail(&netcp->interface_list, &netcp_device->interface_head);
+	return 0;
+
+quit:
+	free_netdev(ndev);
+	return ret;
+}
+
+static void netcp_delete_interface(struct netcp_device *netcp_device,
+				   struct net_device *ndev)
+{
+	struct netcp_intf_modpriv *intf_modpriv, *tmp;
+	struct netcp_intf *netcp = netdev_priv(ndev);
+	struct netcp_module *module;
+
+	dev_dbg(netcp_device->device, "Removing interface \"%s\"\n",
+		ndev->name);
+
+	/* Notify each of the modules that the interface is going away */
+	list_for_each_entry_safe(intf_modpriv, tmp, &netcp->module_head,
+				 intf_list) {
+		module = intf_modpriv->netcp_module;
+		dev_dbg(netcp_device->device, "Releasing module \"%s\"\n",
+			module->name);
+		if (module->release)
+			module->release(intf_modpriv->module_priv);
+		list_del(&intf_modpriv->intf_list);
+	}
+	WARN(!list_empty(&netcp->module_head), "%s interface module list is not empty!\n",
+	     ndev->name);
+
+	list_del(&netcp->interface_list);
+
+	of_node_put(netcp->node_interface);
+	unregister_netdev(ndev);
+	free_netdev(ndev);
+}
+
+static int netcp_probe(struct platform_device *pdev)
+{
+	struct device_node *node = pdev->dev.of_node;
+	struct netcp_intf *netcp_intf, *netcp_tmp;
+	struct device_node *child, *interfaces;
+	struct netcp_device *netcp_device;
+	struct device *dev = &pdev->dev;
+	struct netcp_module *module;
+	int ret;
+
+	if (!knav_dma_device_ready() ||
+	    !knav_qmss_device_ready())
+		return -EPROBE_DEFER;
+
+	if (!node) {
+		dev_err(dev, "could not find device info\n");
+		return -ENODEV;
+	}
+
+	/* Allocate a new NETCP device instance */
+	netcp_device = devm_kzalloc(dev, sizeof(*netcp_device), GFP_KERNEL);
+	if (!netcp_device)
+		return -ENOMEM;
+
+	pm_runtime_enable(&pdev->dev);
+	ret = pm_runtime_get_sync(&pdev->dev);
+	if (ret < 0) {
+		dev_err(dev, "Failed to enable NETCP power-domain\n");
+		pm_runtime_disable(&pdev->dev);
+		return ret;
+	}
+
+	/* Initialize the NETCP device instance */
+	INIT_LIST_HEAD(&netcp_device->interface_head);
+	INIT_LIST_HEAD(&netcp_device->modpriv_head);
+	netcp_device->device = dev;
+	platform_set_drvdata(pdev, netcp_device);
+
+	/* create interfaces */
+	interfaces = of_get_child_by_name(node, "netcp-interfaces");
+	if (!interfaces) {
+		dev_err(dev, "could not find netcp-interfaces node\n");
+		ret = -ENODEV;
+		goto probe_quit;
+	}
+
+	for_each_available_child_of_node(interfaces, child) {
+		ret = netcp_create_interface(netcp_device, child);
+		if (ret) {
+			dev_err(dev, "could not create interface(%pOFn)\n",
+				child);
+			goto probe_quit_interface;
+		}
+	}
+
+	of_node_put(interfaces);
+
+	/* Add the device instance to the list */
+	list_add_tail(&netcp_device->device_list, &netcp_devices);
+
+	/* Probe & attach any modules already registered */
+	mutex_lock(&netcp_modules_lock);
+	for_each_netcp_module(module) {
+		ret = netcp_module_probe(netcp_device, module);
+		if (ret < 0)
+			dev_err(dev, "module(%s) probe failed\n", module->name);
+	}
+	mutex_unlock(&netcp_modules_lock);
+	return 0;
+
+probe_quit_interface:
+	list_for_each_entry_safe(netcp_intf, netcp_tmp,
+				 &netcp_device->interface_head,
+				 interface_list) {
+		netcp_delete_interface(netcp_device, netcp_intf->ndev);
+	}
+
+	of_node_put(interfaces);
+
+probe_quit:
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	platform_set_drvdata(pdev, NULL);
+	return ret;
+}
+
+static int netcp_remove(struct platform_device *pdev)
+{
+	struct netcp_device *netcp_device = platform_get_drvdata(pdev);
+	struct netcp_intf *netcp_intf, *netcp_tmp;
+	struct netcp_inst_modpriv *inst_modpriv, *tmp;
+	struct netcp_module *module;
+
+	list_for_each_entry_safe(inst_modpriv, tmp, &netcp_device->modpriv_head,
+				 inst_list) {
+		module = inst_modpriv->netcp_module;
+		dev_dbg(&pdev->dev, "Removing module \"%s\"\n", module->name);
+		module->remove(netcp_device, inst_modpriv->module_priv);
+		list_del(&inst_modpriv->inst_list);
+	}
+
+	/* now that all modules are removed, clean up the interfaces */
+	list_for_each_entry_safe(netcp_intf, netcp_tmp,
+				 &netcp_device->interface_head,
+				 interface_list) {
+		netcp_delete_interface(netcp_device, netcp_intf->ndev);
+	}
+
+	WARN(!list_empty(&netcp_device->interface_head),
+	     "%s interface list not empty!\n", pdev->name);
+
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	platform_set_drvdata(pdev, NULL);
+	return 0;
+}
+
+static const struct of_device_id of_match[] = {
+	{ .compatible = "ti,netcp-1.0", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_match);
+
+static struct platform_driver netcp_driver = {
+	.driver = {
+		.name		= "netcp-1.0",
+		.of_match_table	= of_match,
+	},
+	.probe = netcp_probe,
+	.remove = netcp_remove,
+};
+module_platform_driver(netcp_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs");
+MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com");