// SPDX-License-Identifier: GPL-2.0
/*
 * Texas Instruments Ethernet Switch Driver
 *
 * Copyright (C) 2012 Texas Instruments
 *
 */

#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/timer.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/irqreturn.h>
#include <linux/interrupt.h>
#include <linux/if_ether.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/net_tstamp.h>
#include <linux/phy.h>
#include <linux/phy/phy.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/pm_runtime.h>
#include <linux/gpio/consumer.h>
#include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/of_platform.h>
#include <linux/if_vlan.h>
#include <linux/kmemleak.h>
#include <linux/sys_soc.h>
#include <net/page_pool/helpers.h>
#include <linux/bpf.h>
#include <linux/bpf_trace.h>

#include <linux/pinctrl/consumer.h>
#include <net/pkt_cls.h>

#include "cpsw.h"
#include "cpsw_ale.h"
#include "cpsw_priv.h"
#include "cpsw_sl.h"
#include "cpts.h"
#include "davinci_cpdma.h"

#include <net/pkt_sched.h>

static int debug_level;
module_param(debug_level, int, 0);
MODULE_PARM_DESC(debug_level, "cpsw debug level (NETIF_MSG bits)");

static int ale_ageout = 10;
module_param(ale_ageout, int, 0);
MODULE_PARM_DESC(ale_ageout, "cpsw ale ageout interval (seconds)");

static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
module_param(rx_packet_max, int, 0);
MODULE_PARM_DESC(rx_packet_max, "maximum receive packet size (bytes)");

static int descs_pool_size = CPSW_CPDMA_DESCS_POOL_SIZE_DEFAULT;
module_param(descs_pool_size, int, 0444);
MODULE_PARM_DESC(descs_pool_size, "Number of CPDMA CPPI descriptors in pool");

#define for_each_slave(priv, func, arg...)                              \
        do {                                                            \
                struct cpsw_slave *slave;                               \
                struct cpsw_common *cpsw = (priv)->cpsw;                \
                int n;                                                  \
                if (cpsw->data.dual_emac)                               \
                        (func)((cpsw)->slaves + priv->emac_port, ##arg);\
                else                                                    \
                        for (n = cpsw->data.slaves,                     \
                                        slave = cpsw->slaves;           \
                                        n; n--)                         \
                                (func)(slave++, ##arg);                 \
        } while (0)

static int cpsw_slave_index_priv(struct cpsw_common *cpsw,
                                 struct cpsw_priv *priv)
{
        return cpsw->data.dual_emac ? priv->emac_port : cpsw->data.active_slave;
}

static int cpsw_get_slave_port(u32 slave_num)
{
        return slave_num + 1;
}

static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
                                    __be16 proto, u16 vid);

static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
{
        struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
        struct cpsw_ale *ale = cpsw->ale;
        int i;

        if (cpsw->data.dual_emac) {
                bool flag = false;

                /* Enabling promiscuous mode for one interface will be
                 * common for both the interface as the interface shares
                 * the same hardware resource.
                 */
                for (i = 0; i < cpsw->data.slaves; i++)
                        if (cpsw->slaves[i].ndev->flags & IFF_PROMISC)
                                flag = true;

                if (!enable && flag) {
                        enable = true;
                        dev_err(&ndev->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n");
                }

                if (enable) {
                        /* Enable Bypass */
                        cpsw_ale_control_set(ale, 0, ALE_BYPASS, 1);

                        dev_dbg(&ndev->dev, "promiscuity enabled\n");
                } else {
                        /* Disable Bypass */
                        cpsw_ale_control_set(ale, 0, ALE_BYPASS, 0);
                        dev_dbg(&ndev->dev, "promiscuity disabled\n");
                }
        } else {
                if (enable) {
                        unsigned long timeout = jiffies + HZ;

                        /* Disable Learn for all ports (host is port 0 and slaves are port 1 and up */
                        for (i = 0; i <= cpsw->data.slaves; i++) {
                                cpsw_ale_control_set(ale, i,
                                                     ALE_PORT_NOLEARN, 1);
                                cpsw_ale_control_set(ale, i,
                                                     ALE_PORT_NO_SA_UPDATE, 1);
                        }

                        /* Clear All Untouched entries */
                        cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
                        do {
                                cpu_relax();
                                if (cpsw_ale_control_get(ale, 0, ALE_AGEOUT))
                                        break;
                        } while (time_after(timeout, jiffies));
                        cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);

                        /* Clear all mcast from ALE */
                        cpsw_ale_flush_multicast(ale, ALE_ALL_PORTS, -1);
                        __hw_addr_ref_unsync_dev(&ndev->mc, ndev, NULL);

                        /* Flood All Unicast Packets to Host port */
                        cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 1);
                        dev_dbg(&ndev->dev, "promiscuity enabled\n");
                } else {
                        /* Don't Flood All Unicast Packets to Host port */
                        cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 0);

                        /* Enable Learn for all ports (host is port 0 and slaves are port 1 and up */
                        for (i = 0; i <= cpsw->data.slaves; i++) {
                                cpsw_ale_control_set(ale, i,
                                                     ALE_PORT_NOLEARN, 0);
                                cpsw_ale_control_set(ale, i,
                                                     ALE_PORT_NO_SA_UPDATE, 0);
                        }
                        dev_dbg(&ndev->dev, "promiscuity disabled\n");
                }
        }
}

/**
 * cpsw_set_mc - adds multicast entry to the table if it's not added or deletes
 * if it's not deleted
 * @ndev: device to sync
 * @addr: address to be added or deleted
 * @vid: vlan id, if vid < 0 set/unset address for real device
 * @add: add address if the flag is set or remove otherwise
 */
static int cpsw_set_mc(struct net_device *ndev, const u8 *addr,
                       int vid, int add)
{
        struct cpsw_priv *priv = netdev_priv(ndev);
        struct cpsw_common *cpsw = priv->cpsw;
        int mask, flags, ret;

        if (vid < 0) {
                if (cpsw->data.dual_emac)
                        vid = cpsw->slaves[priv->emac_port].port_vlan;
                else
                        vid = 0;
        }

        mask = cpsw->data.dual_emac ? ALE_PORT_HOST : ALE_ALL_PORTS;
        flags = vid ? ALE_VLAN : 0;

        if (add)
                ret = cpsw_ale_add_mcast(cpsw->ale, addr, mask, flags, vid, 0);
        else
                ret = cpsw_ale_del_mcast(cpsw->ale, addr, 0, flags, vid);

        return ret;
}

static int cpsw_update_vlan_mc(struct net_device *vdev, int vid, void *ctx)
{
        struct addr_sync_ctx *sync_ctx = ctx;
        struct netdev_hw_addr *ha;
        int found = 0, ret = 0;

        if (!vdev || !(vdev->flags & IFF_UP))
                return 0;

        /* vlan address is relevant if its sync_cnt != 0 */
        netdev_for_each_mc_addr(ha, vdev) {
                if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
                        found = ha->sync_cnt;
                        break;
                }
        }

        if (found)
                sync_ctx->consumed++;

        if (sync_ctx->flush) {
                if (!found)
                        cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
                return 0;
        }

        if (found)
                ret = cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 1);

        return ret;
}

static int cpsw_add_mc_addr(struct net_device *ndev, const u8 *addr, int num)
{
        struct addr_sync_ctx sync_ctx;
        int ret;

        sync_ctx.consumed = 0;
        sync_ctx.addr = addr;
        sync_ctx.ndev = ndev;
        sync_ctx.flush = 0;

        ret = vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
        if (sync_ctx.consumed < num && !ret)
                ret = cpsw_set_mc(ndev, addr, -1, 1);

        return ret;
}

static int cpsw_del_mc_addr(struct net_device *ndev, const u8 *addr, int num)
{
        struct addr_sync_ctx sync_ctx;

        sync_ctx.consumed = 0;
        sync_ctx.addr = addr;
        sync_ctx.ndev = ndev;
        sync_ctx.flush = 1;

        vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
        if (sync_ctx.consumed == num)
                cpsw_set_mc(ndev, addr, -1, 0);

        return 0;
}

static int cpsw_purge_vlan_mc(struct net_device *vdev, int vid, void *ctx)
{
        struct addr_sync_ctx *sync_ctx = ctx;
        struct netdev_hw_addr *ha;
        int found = 0;

        if (!vdev || !(vdev->flags & IFF_UP))
                return 0;

        /* vlan address is relevant if its sync_cnt != 0 */
        netdev_for_each_mc_addr(ha, vdev) {
                if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
                        found = ha->sync_cnt;
                        break;
                }
        }

        if (!found)
                return 0;

        sync_ctx->consumed++;
        cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
        return 0;
}

static int cpsw_purge_all_mc(struct net_device *ndev, const u8 *addr, int num)
{
        struct addr_sync_ctx sync_ctx;

        sync_ctx.addr = addr;
        sync_ctx.ndev = ndev;
        sync_ctx.consumed = 0;

        vlan_for_each(ndev, cpsw_purge_vlan_mc, &sync_ctx);
        if (sync_ctx.consumed < num)
                cpsw_set_mc(ndev, addr, -1, 0);

        return 0;
}

static void cpsw_ndo_set_rx_mode_work(struct work_struct *work)
{
        struct cpsw_priv *priv = container_of(work, struct cpsw_priv, rx_mode_work);
        struct cpsw_common *cpsw = priv->cpsw;
        struct net_device *ndev = priv->ndev;
        int slave_port = -1;

        rtnl_lock();
        if (!netif_running(ndev))
                goto unlock_rtnl;

        netif_addr_lock_bh(ndev);

        if (cpsw->data.dual_emac)
                slave_port = priv->emac_port + 1;

        if (ndev->flags & IFF_PROMISC) {
                /* Enable promiscuous mode */
                cpsw_set_promiscious(ndev, true);
                cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI, slave_port);
                goto unlock_addr;
        } else {
                /* Disable promiscuous mode */
                cpsw_set_promiscious(ndev, false);
        }

        /* Restore allmulti on vlans if necessary */
        cpsw_ale_set_allmulti(cpsw->ale,
                              ndev->flags & IFF_ALLMULTI, slave_port);

        /* add/remove mcast address either for real netdev or for vlan */
        __hw_addr_ref_sync_dev(&ndev->mc, ndev, cpsw_add_mc_addr,
                               cpsw_del_mc_addr);

unlock_addr:
        netif_addr_unlock_bh(ndev);
unlock_rtnl:
        rtnl_unlock();
}

static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
{
        struct cpsw_priv *priv = netdev_priv(ndev);

        schedule_work(&priv->rx_mode_work);
}

static unsigned int cpsw_rxbuf_total_len(unsigned int len)
{
        len += CPSW_HEADROOM_NA;
        len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));

        return SKB_DATA_ALIGN(len);
}

static void cpsw_rx_handler(void *token, int len, int status)
{
        struct page             *new_page, *page = token;
        void                    *pa = page_address(page);
        struct cpsw_meta_xdp    *xmeta = pa + CPSW_XMETA_OFFSET;
        struct cpsw_common      *cpsw = ndev_to_cpsw(xmeta->ndev);
        int                     pkt_size = cpsw->rx_packet_max;
        int                     ret = 0, port, ch = xmeta->ch;
        int                     headroom = CPSW_HEADROOM_NA;
        struct net_device       *ndev = xmeta->ndev;
        u32                     metasize = 0;
        struct cpsw_priv        *priv;
        struct page_pool        *pool;
        struct sk_buff          *skb;
        struct xdp_buff         xdp;
        dma_addr_t              dma;

        if (cpsw->data.dual_emac && status >= 0) {
                port = CPDMA_RX_SOURCE_PORT(status);
                if (port)
                        ndev = cpsw->slaves[--port].ndev;
        }

        priv = netdev_priv(ndev);
        pool = cpsw->page_pool[ch];
        if (unlikely(status < 0) || unlikely(!netif_running(ndev))) {
                /* In dual emac mode check for all interfaces */
                if (cpsw->data.dual_emac && cpsw->usage_count &&
                    (status >= 0)) {
                        /* The packet received is for the interface which
                         * is already down and the other interface is up
                         * and running, instead of freeing which results
                         * in reducing of the number of rx descriptor in
                         * DMA engine, requeue page back to cpdma.
                         */
                        new_page = page;
                        goto requeue;
                }

                /* the interface is going down, pages are purged */
                page_pool_recycle_direct(pool, page);
                return;
        }

        new_page = page_pool_dev_alloc_pages(pool);
        if (unlikely(!new_page)) {
                new_page = page;
                ndev->stats.rx_dropped++;
                goto requeue;
        }

        if (priv->xdp_prog) {
                int size = len;

                xdp_init_buff(&xdp, PAGE_SIZE, &priv->xdp_rxq[ch]);
                if (status & CPDMA_RX_VLAN_ENCAP) {
                        headroom += CPSW_RX_VLAN_ENCAP_HDR_SIZE;
                        size -= CPSW_RX_VLAN_ENCAP_HDR_SIZE;
                }

                xdp_prepare_buff(&xdp, pa, headroom, size, true);

                port = priv->emac_port + cpsw->data.dual_emac;
                ret = cpsw_run_xdp(priv, ch, &xdp, page, port, &len);
                if (ret != CPSW_XDP_PASS)
                        goto requeue;

                headroom = xdp.data - xdp.data_hard_start;
                metasize = xdp.data - xdp.data_meta;

                /* XDP prog can modify vlan tag, so can't use encap header */
                status &= ~CPDMA_RX_VLAN_ENCAP;
        }

        /* pass skb to netstack if no XDP prog or returned XDP_PASS */
        skb = build_skb(pa, cpsw_rxbuf_total_len(pkt_size));
        if (!skb) {
                ndev->stats.rx_dropped++;
                page_pool_recycle_direct(pool, page);
                goto requeue;
        }

        skb_reserve(skb, headroom);
        skb_put(skb, len);
        if (metasize)
                skb_metadata_set(skb, metasize);
        skb->dev = ndev;
        if (status & CPDMA_RX_VLAN_ENCAP)
                cpsw_rx_vlan_encap(skb);
        if (priv->rx_ts_enabled)
                cpts_rx_timestamp(cpsw->cpts, skb);
        skb->protocol = eth_type_trans(skb, ndev);

        /* mark skb for recycling */
        skb_mark_for_recycle(skb);
        netif_receive_skb(skb);

        ndev->stats.rx_bytes += len;
        ndev->stats.rx_packets++;

requeue:
        xmeta = page_address(new_page) + CPSW_XMETA_OFFSET;
        xmeta->ndev = ndev;
        xmeta->ch = ch;

        dma = page_pool_get_dma_addr(new_page) + CPSW_HEADROOM_NA;
        ret = cpdma_chan_submit_mapped(cpsw->rxv[ch].ch, new_page, dma,
                                       pkt_size, 0);
        if (ret < 0) {
                WARN_ON(ret == -ENOMEM);
                page_pool_recycle_direct(pool, new_page);
        }
}

static void _cpsw_adjust_link(struct cpsw_slave *slave,
                              struct cpsw_priv *priv, bool *link)
{
        struct phy_device       *phy = slave->phy;
        u32                     mac_control = 0;
        u32                     slave_port;
        struct cpsw_common *cpsw = priv->cpsw;

        if (!phy)
                return;

        slave_port = cpsw_get_slave_port(slave->slave_num);

        if (phy->link) {
                mac_control = CPSW_SL_CTL_GMII_EN;

                if (phy->speed == 1000)
                        mac_control |= CPSW_SL_CTL_GIG;
                if (phy->duplex)
                        mac_control |= CPSW_SL_CTL_FULLDUPLEX;

                /* set speed_in input in case RMII mode is used in 100Mbps */
                if (phy->speed == 100)
                        mac_control |= CPSW_SL_CTL_IFCTL_A;
                /* in band mode only works in 10Mbps RGMII mode */
                else if ((phy->speed == 10) && phy_interface_is_rgmii(phy))
                        mac_control |= CPSW_SL_CTL_EXT_EN; /* In Band mode */

                if (priv->rx_pause)
                        mac_control |= CPSW_SL_CTL_RX_FLOW_EN;

                if (priv->tx_pause)
                        mac_control |= CPSW_SL_CTL_TX_FLOW_EN;

                if (mac_control != slave->mac_control)
                        cpsw_sl_ctl_set(slave->mac_sl, mac_control);

                /* enable forwarding */
                cpsw_ale_control_set(cpsw->ale, slave_port,
                                     ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);

                *link = true;

                if (priv->shp_cfg_speed &&
                    priv->shp_cfg_speed != slave->phy->speed &&
                    !cpsw_shp_is_off(priv))
                        dev_warn(priv->dev,
                                 "Speed was changed, CBS shaper speeds are changed!");
        } else {
                mac_control = 0;
                /* disable forwarding */
                cpsw_ale_control_set(cpsw->ale, slave_port,
                                     ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);

                cpsw_sl_wait_for_idle(slave->mac_sl, 100);

                cpsw_sl_ctl_reset(slave->mac_sl);
        }

        if (mac_control != slave->mac_control)
                phy_print_status(phy);

        slave->mac_control = mac_control;
}

static void cpsw_adjust_link(struct net_device *ndev)
{
        struct cpsw_priv        *priv = netdev_priv(ndev);
        struct cpsw_common      *cpsw = priv->cpsw;
        bool                    link = false;

        for_each_slave(priv, _cpsw_adjust_link, priv, &link);

        if (link) {
                if (cpsw_need_resplit(cpsw))
                        cpsw_split_res(cpsw);

                netif_carrier_on(ndev);
                if (netif_running(ndev))
                        netif_tx_wake_all_queues(ndev);
        } else {
                netif_carrier_off(ndev);
                netif_tx_stop_all_queues(ndev);
        }
}

static inline void cpsw_add_dual_emac_def_ale_entries(
                struct cpsw_priv *priv, struct cpsw_slave *slave,
                u32 slave_port)
{
        struct cpsw_common *cpsw = priv->cpsw;
        u32 port_mask = 1 << slave_port | ALE_PORT_HOST;

        if (cpsw->version == CPSW_VERSION_1)
                slave_write(slave, slave->port_vlan, CPSW1_PORT_VLAN);
        else
                slave_write(slave, slave->port_vlan, CPSW2_PORT_VLAN);
        cpsw_ale_add_vlan(cpsw->ale, slave->port_vlan, port_mask,
                          port_mask, port_mask, 0);
        cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
                           ALE_PORT_HOST, ALE_VLAN, slave->port_vlan, 0);
        cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
                           HOST_PORT_NUM, ALE_VLAN |
                           ALE_SECURE, slave->port_vlan);
        cpsw_ale_control_set(cpsw->ale, slave_port,
                             ALE_PORT_DROP_UNKNOWN_VLAN, 1);
}

static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
{
        u32 slave_port;
        struct phy_device *phy;
        struct cpsw_common *cpsw = priv->cpsw;

        cpsw_sl_reset(slave->mac_sl, 100);
        cpsw_sl_ctl_reset(slave->mac_sl);

        /* setup priority mapping */
        cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_PRI_MAP,
                          RX_PRIORITY_MAPPING);

        switch (cpsw->version) {
        case CPSW_VERSION_1:
                slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
                /* Increase RX FIFO size to 5 for supporting fullduplex
                 * flow control mode
                 */
                slave_write(slave,
                            (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
                            CPSW_MAX_BLKS_RX, CPSW1_MAX_BLKS);
                break;
        case CPSW_VERSION_2:
        case CPSW_VERSION_3:
        case CPSW_VERSION_4:
                slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
                /* Increase RX FIFO size to 5 for supporting fullduplex
                 * flow control mode
                 */
                slave_write(slave,
                            (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
                            CPSW_MAX_BLKS_RX, CPSW2_MAX_BLKS);
                break;
        }

        /* setup max packet size, and mac address */
        cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_MAXLEN,
                          cpsw->rx_packet_max);
        cpsw_set_slave_mac(slave, priv);

        slave->mac_control = 0; /* no link yet */

        slave_port = cpsw_get_slave_port(slave->slave_num);

        if (cpsw->data.dual_emac)
                cpsw_add_dual_emac_def_ale_entries(priv, slave, slave_port);
        else
                cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
                                   1 << slave_port, 0, 0, ALE_MCAST_FWD_2);

        if (slave->data->phy_node) {
                phy = of_phy_connect(priv->ndev, slave->data->phy_node,
                                 &cpsw_adjust_link, 0, slave->data->phy_if);
                if (!phy) {
                        dev_err(priv->dev, "phy \"%pOF\" not found on slave %d\n",
                                slave->data->phy_node,
                                slave->slave_num);
                        return;
                }
        } else {
                phy = phy_connect(priv->ndev, slave->data->phy_id,
                                 &cpsw_adjust_link, slave->data->phy_if);
                if (IS_ERR(phy)) {
                        dev_err(priv->dev,
                                "phy \"%s\" not found on slave %d, err %ld\n",
                                slave->data->phy_id, slave->slave_num,
                                PTR_ERR(phy));
                        return;
                }
        }

        phy->mac_managed_pm = true;

        slave->phy = phy;

        phy_disable_eee(slave->phy);

        phy_attached_info(slave->phy);

        phy_start(slave->phy);

        /* Configure GMII_SEL register */
        if (!IS_ERR(slave->data->ifphy))
                phy_set_mode_ext(slave->data->ifphy, PHY_MODE_ETHERNET,
                                 slave->data->phy_if);
        else
                cpsw_phy_sel(cpsw->dev, slave->phy->interface,
                             slave->slave_num);
}

static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
{
        struct cpsw_common *cpsw = priv->cpsw;
        const int vlan = cpsw->data.default_vlan;
        u32 reg;
        int i;
        int unreg_mcast_mask;

        reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
               CPSW2_PORT_VLAN;

        writel(vlan, &cpsw->host_port_regs->port_vlan);

        for (i = 0; i < cpsw->data.slaves; i++)
                slave_write(cpsw->slaves + i, vlan, reg);

        if (priv->ndev->flags & IFF_ALLMULTI)
                unreg_mcast_mask = ALE_ALL_PORTS;
        else
                unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;

        cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS,
                          ALE_ALL_PORTS, ALE_ALL_PORTS,
                          unreg_mcast_mask);
}

static void cpsw_init_host_port(struct cpsw_priv *priv)
{
        u32 fifo_mode;
        u32 control_reg;
        struct cpsw_common *cpsw = priv->cpsw;

        /* soft reset the controller and initialize ale */
        soft_reset("cpsw", &cpsw->regs->soft_reset);
        cpsw_ale_start(cpsw->ale);

        /* switch to vlan aware mode */
        cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_VLAN_AWARE,
                             CPSW_ALE_VLAN_AWARE);
        control_reg = readl(&cpsw->regs->control);
        control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP;
        writel(control_reg, &cpsw->regs->control);
        fifo_mode = (cpsw->data.dual_emac) ? CPSW_FIFO_DUAL_MAC_MODE :
                     CPSW_FIFO_NORMAL_MODE;
        writel(fifo_mode, &cpsw->host_port_regs->tx_in_ctl);

        /* setup host port priority mapping */
        writel_relaxed(CPDMA_TX_PRIORITY_MAP,
                       &cpsw->host_port_regs->cpdma_tx_pri_map);
        writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map);

        cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
                             ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);

        if (!cpsw->data.dual_emac) {
                cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
                                   0, 0);
                cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
                                   ALE_PORT_HOST, 0, 0, ALE_MCAST_FWD_2);
        }
}

static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_common *cpsw)
{
        u32 slave_port;

        slave_port = cpsw_get_slave_port(slave->slave_num);

        if (!slave->phy)
                return;
        phy_stop(slave->phy);
        phy_disconnect(slave->phy);
        slave->phy = NULL;
        cpsw_ale_control_set(cpsw->ale, slave_port,
                             ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
        cpsw_sl_reset(slave->mac_sl, 100);
        cpsw_sl_ctl_reset(slave->mac_sl);
}

static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
{
        struct cpsw_priv *priv = arg;

        if (!vdev)
                return 0;

        cpsw_ndo_vlan_rx_add_vid(priv->ndev, 0, vid);
        return 0;
}

/* restore resources after port reset */
static void cpsw_restore(struct cpsw_priv *priv)
{
        /* restore vlan configurations */
        vlan_for_each(priv->ndev, cpsw_restore_vlans, priv);

        /* restore MQPRIO offload */
        for_each_slave(priv, cpsw_mqprio_resume, priv);

        /* restore CBS offload */
        for_each_slave(priv, cpsw_cbs_resume, priv);
}

static int cpsw_ndo_open(struct net_device *ndev)
{
        struct cpsw_priv *priv = netdev_priv(ndev);
        struct cpsw_common *cpsw = priv->cpsw;
        int ret;
        u32 reg;

        ret = pm_runtime_resume_and_get(cpsw->dev);
        if (ret < 0)
                return ret;

        netif_carrier_off(ndev);

        /* Notify the stack of the actual queue counts. */
        ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num);
        if (ret) {
                dev_err(priv->dev, "cannot set real number of tx queues\n");
                goto err_cleanup;
        }

        ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num);
        if (ret) {
                dev_err(priv->dev, "cannot set real number of rx queues\n");
                goto err_cleanup;
        }

        reg = cpsw->version;

        dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
                 CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),
                 CPSW_RTL_VERSION(reg));

        /* Initialize host and slave ports */
        if (!cpsw->usage_count)
                cpsw_init_host_port(priv);
        for_each_slave(priv, cpsw_slave_open, priv);

        /* Add default VLAN */
        if (!cpsw->data.dual_emac)
                cpsw_add_default_vlan(priv);
        else
                cpsw_ale_add_vlan(cpsw->ale, cpsw->data.default_vlan,
                                  ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0);

        /* initialize shared resources for every ndev */
        if (!cpsw->usage_count) {
                /* disable priority elevation */
                writel_relaxed(0, &cpsw->regs->ptype);

                /* enable statistics collection only on all ports */
                writel_relaxed(0x7, &cpsw->regs->stat_port_en);

                /* Enable internal fifo flow control */
                writel(0x7, &cpsw->regs->flow_control);

                napi_enable(&cpsw->napi_rx);
                napi_enable(&cpsw->napi_tx);

                if (cpsw->tx_irq_disabled) {
                        cpsw->tx_irq_disabled = false;
                        enable_irq(cpsw->irqs_table[1]);
                }

                if (cpsw->rx_irq_disabled) {
                        cpsw->rx_irq_disabled = false;
                        enable_irq(cpsw->irqs_table[0]);
                }

                /* create rxqs for both infs in dual mac as they use same pool
                 * and must be destroyed together when no users.
                 */
                ret = cpsw_create_xdp_rxqs(cpsw);
                if (ret < 0)
                        goto err_cleanup;

                ret = cpsw_fill_rx_channels(priv);
                if (ret < 0)
                        goto err_cleanup;

                if (cpsw->cpts) {
                        if (cpts_register(cpsw->cpts))
                                dev_err(priv->dev, "error registering cpts device\n");
                        else
                                writel(0x10, &cpsw->wr_regs->misc_en);
                }
        }

        cpsw_restore(priv);

        /* Enable Interrupt pacing if configured */
        if (cpsw->coal_intvl != 0) {
                struct ethtool_coalesce coal;

                coal.rx_coalesce_usecs = cpsw->coal_intvl;
                cpsw_set_coalesce(ndev, &coal, NULL, NULL);
        }

        cpdma_ctlr_start(cpsw->dma);
        cpsw_intr_enable(cpsw);
        cpsw->usage_count++;

        return 0;

err_cleanup:
        if (!cpsw->usage_count) {
                napi_disable(&cpsw->napi_rx);
                napi_disable(&cpsw->napi_tx);
                cpdma_ctlr_stop(cpsw->dma);
                cpsw_destroy_xdp_rxqs(cpsw);
        }

        for_each_slave(priv, cpsw_slave_stop, cpsw);
        pm_runtime_put_sync(cpsw->dev);
        netif_carrier_off(priv->ndev);
        return ret;
}

static int cpsw_ndo_stop(struct net_device *ndev)
{
        struct cpsw_priv *priv = netdev_priv(ndev);
        struct cpsw_common *cpsw = priv->cpsw;

        cpsw_info(priv, ifdown, "shutting down cpsw device\n");
        __hw_addr_ref_unsync_dev(&ndev->mc, ndev, cpsw_purge_all_mc);
        netif_tx_stop_all_queues(priv->ndev);
        netif_carrier_off(priv->ndev);

        if (cpsw->usage_count <= 1) {
                napi_disable(&cpsw->napi_rx);
                napi_disable(&cpsw->napi_tx);
                cpts_unregister(cpsw->cpts);
                cpsw_intr_disable(cpsw);
                cpdma_ctlr_stop(cpsw->dma);
                cpsw_ale_stop(cpsw->ale);
                cpsw_destroy_xdp_rxqs(cpsw);
        }
        for_each_slave(priv, cpsw_slave_stop, cpsw);

        if (cpsw_need_resplit(cpsw))
                cpsw_split_res(cpsw);

        cpsw->usage_count--;
        pm_runtime_put_sync(cpsw->dev);
        return 0;
}

static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
                                       struct net_device *ndev)
{
        struct cpsw_priv *priv = netdev_priv(ndev);
        struct cpsw_common *cpsw = priv->cpsw;
        struct cpts *cpts = cpsw->cpts;
        struct netdev_queue *txq;
        struct cpdma_chan *txch;
        int ret, q_idx;

        if (skb_put_padto(skb, CPSW_MIN_PACKET_SIZE)) {
                cpsw_err(priv, tx_err, "packet pad failed\n");
                ndev->stats.tx_dropped++;
                return NET_XMIT_DROP;
        }

        if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
            priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb))
                skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;

        q_idx = skb_get_queue_mapping(skb);
        if (q_idx >= cpsw->tx_ch_num)
                q_idx = q_idx % cpsw->tx_ch_num;

        txch = cpsw->txv[q_idx].ch;
        txq = netdev_get_tx_queue(ndev, q_idx);
        skb_tx_timestamp(skb);
        ret = cpdma_chan_submit(txch, skb, skb->data, skb->len,
                                priv->emac_port + cpsw->data.dual_emac);
        if (unlikely(ret != 0)) {
                cpsw_err(priv, tx_err, "desc submit failed\n");
                goto fail;
        }

        /* If there is no more tx desc left free then we need to
         * tell the kernel to stop sending us tx frames.
         */
        if (unlikely(!cpdma_check_free_tx_desc(txch))) {
                netif_tx_stop_queue(txq);

                /* Barrier, so that stop_queue visible to other cpus */
                smp_mb__after_atomic();

                if (cpdma_check_free_tx_desc(txch))
                        netif_tx_wake_queue(txq);
        }

        return NETDEV_TX_OK;
fail:
        ndev->stats.tx_dropped++;
        netif_tx_stop_queue(txq);

        /* Barrier, so that stop_queue visible to other cpus */
        smp_mb__after_atomic();

        if (cpdma_check_free_tx_desc(txch))
                netif_tx_wake_queue(txq);

        return NETDEV_TX_BUSY;
}

static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
{
        struct cpsw_priv *priv = netdev_priv(ndev);
        struct sockaddr *addr = (struct sockaddr *)p;
        struct cpsw_common *cpsw = priv->cpsw;
        int flags = 0;
        u16 vid = 0;
        int ret;

        if (!is_valid_ether_addr(addr->sa_data))
                return -EADDRNOTAVAIL;

        ret = pm_runtime_resume_and_get(cpsw->dev);
        if (ret < 0)
                return ret;

        if (cpsw->data.dual_emac) {
                vid = cpsw->slaves[priv->emac_port].port_vlan;
                flags = ALE_VLAN;
        }

        cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
                           flags, vid);
        cpsw_ale_add_ucast(cpsw->ale, addr->sa_data, HOST_PORT_NUM,
                           flags, vid);

        memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN);
        eth_hw_addr_set(ndev, priv->mac_addr);
        for_each_slave(priv, cpsw_set_slave_mac, priv);

        pm_runtime_put(cpsw->dev);

        return 0;
}

static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
                                unsigned short vid)
{
        int ret;
        int unreg_mcast_mask = 0;
        int mcast_mask;
        u32 port_mask;
        struct cpsw_common *cpsw = priv->cpsw;

        if (cpsw->data.dual_emac) {
                port_mask = (1 << (priv->emac_port + 1)) | ALE_PORT_HOST;

                mcast_mask = ALE_PORT_HOST;
                if (priv->ndev->flags & IFF_ALLMULTI)
                        unreg_mcast_mask = mcast_mask;
        } else {
                port_mask = ALE_ALL_PORTS;
                mcast_mask = port_mask;

                if (priv->ndev->flags & IFF_ALLMULTI)
                        unreg_mcast_mask = ALE_ALL_PORTS;
                else
                        unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
        }

        ret = cpsw_ale_add_vlan(cpsw->ale, vid, port_mask, 0, port_mask,
                                unreg_mcast_mask);
        if (ret != 0)
                return ret;

        ret = cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
                                 HOST_PORT_NUM, ALE_VLAN, vid);
        if (ret != 0)
                goto clean_vid;

        ret = cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
                                 mcast_mask, ALE_VLAN, vid, 0);
        if (ret != 0)
                goto clean_vlan_ucast;
        return 0;

clean_vlan_ucast:
        cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
                           HOST_PORT_NUM, ALE_VLAN, vid);
clean_vid:
        cpsw_ale_del_vlan(cpsw->ale, vid, 0);
        return ret;
}

static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
                                    __be16 proto, u16 vid)
{
        struct cpsw_priv *priv = netdev_priv(ndev);
        struct cpsw_common *cpsw = priv->cpsw;
        int ret;

        if (vid == cpsw->data.default_vlan)
                return 0;

        ret = pm_runtime_resume_and_get(cpsw->dev);
        if (ret < 0)
                return ret;

        if (cpsw->data.dual_emac) {
                /* In dual EMAC, reserved VLAN id should not be used for
                 * creating VLAN interfaces as this can break the dual
                 * EMAC port separation
                 */
                int i;

                for (i = 0; i < cpsw->data.slaves; i++) {
                        if (vid == cpsw->slaves[i].port_vlan) {
                                ret = -EINVAL;
                                goto err;
                        }
                }
        }

        dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
        ret = cpsw_add_vlan_ale_entry(priv, vid);
err:
        pm_runtime_put(cpsw->dev);
        return ret;
}

static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
                                     __be16 proto, u16 vid)
{
        struct cpsw_priv *priv = netdev_priv(ndev);
        struct cpsw_common *cpsw = priv->cpsw;
        int ret;

        if (vid == cpsw->data.default_vlan)
                return 0;

        ret = pm_runtime_resume_and_get(cpsw->dev);
        if (ret < 0)
                return ret;

        if (cpsw->data.dual_emac) {
                int i;

                for (i = 0; i < cpsw->data.slaves; i++) {
                        if (vid == cpsw->slaves[i].port_vlan)
                                goto err;
                }
        }

        dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid);
        ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0);
        ret |= cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
                                  HOST_PORT_NUM, ALE_VLAN, vid);
        ret |= cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
                                  0, ALE_VLAN, vid);
        ret |= cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid);
err:
        pm_runtime_put(cpsw->dev);
        return ret;
}

static int cpsw_ndo_xdp_xmit(struct net_device *ndev, int n,
                             struct xdp_frame **frames, u32 flags)
{
        struct cpsw_priv *priv = netdev_priv(ndev);
        struct cpsw_common *cpsw = priv->cpsw;
        struct xdp_frame *xdpf;
        int i, nxmit = 0, port;

        if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
                return -EINVAL;

        for (i = 0; i < n; i++) {
                xdpf = frames[i];
                if (xdpf->len < CPSW_MIN_PACKET_SIZE)
                        break;

                port = priv->emac_port + cpsw->data.dual_emac;
                if (cpsw_xdp_tx_frame(priv, xdpf, NULL, port))
                        break;
                nxmit++;
        }

        return nxmit;
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void cpsw_ndo_poll_controller(struct net_device *ndev)
{
        struct cpsw_common *cpsw = ndev_to_cpsw(ndev);

        cpsw_intr_disable(cpsw);
        cpsw_rx_interrupt(cpsw->irqs_table[0], cpsw);
        cpsw_tx_interrupt(cpsw->irqs_table[1], cpsw);
        cpsw_intr_enable(cpsw);
}
#endif

/* We need a custom implementation of phy_do_ioctl_running() because in switch
 * mode, dev->phydev may be different than the phy of the active_slave. We need
 * to operate on the locally saved phy instead.
 */
static int cpsw_ndo_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
{
        struct cpsw_priv *priv = netdev_priv(dev);
        struct cpsw_common *cpsw = priv->cpsw;
        int slave_no = cpsw_slave_index(cpsw, priv);
        struct phy_device *phy;

        if (!netif_running(dev))
                return -EINVAL;

        phy = cpsw->slaves[slave_no].phy;
        if (phy)
                return phy_mii_ioctl(phy, req, cmd);

        return -EOPNOTSUPP;
}

static const struct net_device_ops cpsw_netdev_ops = {
        .ndo_open               = cpsw_ndo_open,
        .ndo_stop               = cpsw_ndo_stop,
        .ndo_start_xmit         = cpsw_ndo_start_xmit,
        .ndo_set_mac_address    = cpsw_ndo_set_mac_address,
        .ndo_eth_ioctl          = cpsw_ndo_ioctl,
        .ndo_validate_addr      = eth_validate_addr,
        .ndo_tx_timeout         = cpsw_ndo_tx_timeout,
        .ndo_set_rx_mode        = cpsw_ndo_set_rx_mode,
        .ndo_set_tx_maxrate     = cpsw_ndo_set_tx_maxrate,
#ifdef CONFIG_NET_POLL_CONTROLLER
        .ndo_poll_controller    = cpsw_ndo_poll_controller,
#endif
        .ndo_vlan_rx_add_vid    = cpsw_ndo_vlan_rx_add_vid,
        .ndo_vlan_rx_kill_vid   = cpsw_ndo_vlan_rx_kill_vid,
        .ndo_setup_tc           = cpsw_ndo_setup_tc,
        .ndo_bpf                = cpsw_ndo_bpf,
        .ndo_xdp_xmit           = cpsw_ndo_xdp_xmit,
        .ndo_hwtstamp_get       = cpsw_hwtstamp_get,
        .ndo_hwtstamp_set       = cpsw_hwtstamp_set,
};

static void cpsw_get_drvinfo(struct net_device *ndev,
                             struct ethtool_drvinfo *info)
{
        struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
        struct platform_device  *pdev = to_platform_device(cpsw->dev);

        strscpy(info->driver, "cpsw", sizeof(info->driver));
        strscpy(info->version, "1.0", sizeof(info->version));
        strscpy(info->bus_info, pdev->name, sizeof(info->bus_info));
}

static int cpsw_set_pauseparam(struct net_device *ndev,
                               struct ethtool_pauseparam *pause)
{
        struct cpsw_priv *priv = netdev_priv(ndev);
        bool link;

        priv->rx_pause = pause->rx_pause ? true : false;
        priv->tx_pause = pause->tx_pause ? true : false;

        for_each_slave(priv, _cpsw_adjust_link, priv, &link);
        return 0;
}

static int cpsw_set_channels(struct net_device *ndev,
                             struct ethtool_channels *chs)
{
        return cpsw_set_channels_common(ndev, chs, cpsw_rx_handler);
}

static const struct ethtool_ops cpsw_ethtool_ops = {
        .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
        .get_drvinfo    = cpsw_get_drvinfo,
        .get_msglevel   = cpsw_get_msglevel,
        .set_msglevel   = cpsw_set_msglevel,
        .get_link       = ethtool_op_get_link,
        .get_ts_info    = cpsw_get_ts_info,
        .get_coalesce   = cpsw_get_coalesce,
        .set_coalesce   = cpsw_set_coalesce,
        .get_sset_count         = cpsw_get_sset_count,
        .get_strings            = cpsw_get_strings,
        .get_ethtool_stats      = cpsw_get_ethtool_stats,
        .get_pauseparam         = cpsw_get_pauseparam,
        .set_pauseparam         = cpsw_set_pauseparam,
        .get_wol        = cpsw_get_wol,
        .set_wol        = cpsw_set_wol,
        .get_regs_len   = cpsw_get_regs_len,
        .get_regs       = cpsw_get_regs,
        .begin          = cpsw_ethtool_op_begin,
        .complete       = cpsw_ethtool_op_complete,
        .get_channels   = cpsw_get_channels,
        .set_channels   = cpsw_set_channels,
        .get_link_ksettings     = cpsw_get_link_ksettings,
        .set_link_ksettings     = cpsw_set_link_ksettings,
        .get_eee        = cpsw_get_eee,
        .nway_reset     = cpsw_nway_reset,
        .get_ringparam = cpsw_get_ringparam,
        .set_ringparam = cpsw_set_ringparam,
};

static int cpsw_probe_dt(struct cpsw_platform_data *data,
                         struct platform_device *pdev)
{
        struct device_node *node = pdev->dev.of_node;
        struct device_node *slave_node;
        int i = 0, ret;
        u32 prop;

        if (!node)
                return -EINVAL;

        if (of_property_read_u32(node, "slaves", &prop)) {
                dev_err(&pdev->dev, "Missing slaves property in the DT.\n");
                return -EINVAL;
        }
        data->slaves = prop;

        if (of_property_read_u32(node, "active_slave", &prop)) {
                dev_err(&pdev->dev, "Missing active_slave property in the DT.\n");
                return -EINVAL;
        }
        data->active_slave = prop;

        data->slave_data = devm_kcalloc(&pdev->dev,
                                        data->slaves,
                                        sizeof(struct cpsw_slave_data),
                                        GFP_KERNEL);
        if (!data->slave_data)
                return -ENOMEM;

        if (of_property_read_u32(node, "cpdma_channels", &prop)) {
                dev_err(&pdev->dev, "Missing cpdma_channels property in the DT.\n");
                return -EINVAL;
        }
        data->channels = prop;

        if (of_property_read_u32(node, "bd_ram_size", &prop)) {
                dev_err(&pdev->dev, "Missing bd_ram_size property in the DT.\n");
                return -EINVAL;
        }
        data->bd_ram_size = prop;

        if (of_property_read_u32(node, "mac_control", &prop)) {
                dev_err(&pdev->dev, "Missing mac_control property in the DT.\n");
                return -EINVAL;
        }
        data->mac_control = prop;

        if (of_property_read_bool(node, "dual_emac"))
                data->dual_emac = true;

        /*
         * Populate all the child nodes here...
         */
        ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
        /* We do not want to force this, as in some cases may not have child */
        if (ret)
                dev_warn(&pdev->dev, "Doesn't have any child node\n");

        for_each_available_child_of_node(node, slave_node) {
                struct cpsw_slave_data *slave_data = data->slave_data + i;
                int lenp;
                const __be32 *parp;

                /* This is no slave child node, continue */
                if (!of_node_name_eq(slave_node, "slave"))
                        continue;

                slave_data->ifphy = devm_of_phy_get(&pdev->dev, slave_node,
                                                    NULL);
                if (!IS_ENABLED(CONFIG_TI_CPSW_PHY_SEL) &&
                    IS_ERR(slave_data->ifphy)) {
                        ret = PTR_ERR(slave_data->ifphy);
                        dev_err(&pdev->dev,
                                "%d: Error retrieving port phy: %d\n", i, ret);
                        goto err_node_put;
                }

                slave_data->slave_node = slave_node;
                slave_data->phy_node = of_parse_phandle(slave_node,
                                                        "phy-handle", 0);
                parp = of_get_property(slave_node, "phy_id", &lenp);
                if (slave_data->phy_node) {
                        dev_dbg(&pdev->dev,
                                "slave[%d] using phy-handle=\"%pOF\"\n",
                                i, slave_data->phy_node);
                } else if (of_phy_is_fixed_link(slave_node)) {
                        /* In the case of a fixed PHY, the DT node associated
                         * to the PHY is the Ethernet MAC DT node.
                         */
                        ret = of_phy_register_fixed_link(slave_node);
                        if (ret) {
                                dev_err_probe(&pdev->dev, ret, "failed to register fixed-link phy\n");
                                goto err_node_put;
                        }
                        slave_data->phy_node = of_node_get(slave_node);
                } else if (parp) {
                        u32 phyid;
                        struct device_node *mdio_node;
                        struct platform_device *mdio;

                        if (lenp != (sizeof(__be32) * 2)) {
                                dev_err(&pdev->dev, "Invalid slave[%d] phy_id property\n", i);
                                goto no_phy_slave;
                        }
                        mdio_node = of_find_node_by_phandle(be32_to_cpup(parp));
                        phyid = be32_to_cpup(parp+1);
                        mdio = of_find_device_by_node(mdio_node);
                        of_node_put(mdio_node);
                        if (!mdio) {
                                dev_err(&pdev->dev, "Missing mdio platform device\n");
                                ret = -EINVAL;
                                goto err_node_put;
                        }
                        snprintf(slave_data->phy_id, sizeof(slave_data->phy_id),
                                 PHY_ID_FMT, mdio->name, phyid);
                        put_device(&mdio->dev);
                } else {
                        dev_err(&pdev->dev,
                                "No slave[%d] phy_id, phy-handle, or fixed-link property\n",
                                i);
                        goto no_phy_slave;
                }
                ret = of_get_phy_mode(slave_node, &slave_data->phy_if);
                if (ret) {
                        dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n",
                                i);
                        goto err_node_put;
                }

no_phy_slave:
                ret = of_get_mac_address(slave_node, slave_data->mac_addr);
                if (ret) {
                        ret = ti_cm_get_macid(&pdev->dev, i,
                                              slave_data->mac_addr);
                        if (ret)
                                goto err_node_put;
                }
                if (data->dual_emac) {
                        if (of_property_read_u32(slave_node, "dual_emac_res_vlan",
                                                 &prop)) {
                                dev_err(&pdev->dev, "Missing dual_emac_res_vlan in DT.\n");
                                slave_data->dual_emac_res_vlan = i+1;
                                dev_err(&pdev->dev, "Using %d as Reserved VLAN for %d slave\n",
                                        slave_data->dual_emac_res_vlan, i);
                        } else {
                                slave_data->dual_emac_res_vlan = prop;
                        }
                }

                i++;
                if (i == data->slaves) {
                        ret = 0;
                        goto err_node_put;
                }
        }

        return 0;

err_node_put:
        of_node_put(slave_node);
        return ret;
}

static void cpsw_remove_dt(struct platform_device *pdev)
{
        struct cpsw_common *cpsw = platform_get_drvdata(pdev);
        struct cpsw_platform_data *data = &cpsw->data;
        struct device_node *node = pdev->dev.of_node;
        struct device_node *slave_node;
        int i = 0;

        for_each_available_child_of_node(node, slave_node) {
                struct cpsw_slave_data *slave_data = &data->slave_data[i];

                if (!of_node_name_eq(slave_node, "slave"))
                        continue;

                if (of_phy_is_fixed_link(slave_node))
                        of_phy_deregister_fixed_link(slave_node);

                of_node_put(slave_data->phy_node);

                i++;
                if (i == data->slaves) {
                        of_node_put(slave_node);
                        break;
                }
        }

        of_platform_depopulate(&pdev->dev);
}

static int cpsw_probe_dual_emac(struct cpsw_priv *priv)
{
        struct cpsw_common              *cpsw = priv->cpsw;
        struct cpsw_platform_data       *data = &cpsw->data;
        struct net_device               *ndev;
        struct cpsw_priv                *priv_sl2;
        int ret = 0;

        ndev = devm_alloc_etherdev_mqs(cpsw->dev, sizeof(struct cpsw_priv),
                                       CPSW_MAX_QUEUES, CPSW_MAX_QUEUES);
        if (!ndev) {
                dev_err(cpsw->dev, "cpsw: error allocating net_device\n");
                return -ENOMEM;
        }

        priv_sl2 = netdev_priv(ndev);
        priv_sl2->cpsw = cpsw;
        priv_sl2->ndev = ndev;
        priv_sl2->dev  = &ndev->dev;
        priv_sl2->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
        INIT_WORK(&priv_sl2->rx_mode_work, cpsw_ndo_set_rx_mode_work);

        if (is_valid_ether_addr(data->slave_data[1].mac_addr)) {
                memcpy(priv_sl2->mac_addr, data->slave_data[1].mac_addr,
                        ETH_ALEN);
                dev_info(cpsw->dev, "cpsw: Detected MACID = %pM\n",
                         priv_sl2->mac_addr);
        } else {
                eth_random_addr(priv_sl2->mac_addr);
                dev_info(cpsw->dev, "cpsw: Random MACID = %pM\n",
                         priv_sl2->mac_addr);
        }
        eth_hw_addr_set(ndev, priv_sl2->mac_addr);

        priv_sl2->emac_port = 1;
        cpsw->slaves[1].ndev = ndev;
        ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;
        ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
                             NETDEV_XDP_ACT_NDO_XMIT;

        ndev->netdev_ops = &cpsw_netdev_ops;
        ndev->ethtool_ops = &cpsw_ethtool_ops;

        /* register the network device */
        SET_NETDEV_DEV(ndev, cpsw->dev);
        ndev->dev.of_node = cpsw->slaves[1].data->slave_node;
        ret = register_netdev(ndev);
        if (ret)
                dev_err(cpsw->dev, "cpsw: error registering net device\n");

        return ret;
}

static const struct of_device_id cpsw_of_mtable[] = {
        { .compatible = "ti,cpsw"},
        { .compatible = "ti,am335x-cpsw"},
        { .compatible = "ti,am4372-cpsw"},
        { .compatible = "ti,dra7-cpsw"},
        { /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, cpsw_of_mtable);

static const struct soc_device_attribute cpsw_soc_devices[] = {
        { .family = "AM33xx", .revision = "ES1.0"},
        { /* sentinel */ }
};

static int cpsw_probe(struct platform_device *pdev)
{
        struct device                   *dev = &pdev->dev;
        struct clk                      *clk;
        struct cpsw_platform_data       *data;
        struct net_device               *ndev;
        struct cpsw_priv                *priv;
        void __iomem                    *ss_regs;
        struct resource                 *ss_res;
        struct gpio_descs               *mode;
        const struct soc_device_attribute *soc;
        struct cpsw_common              *cpsw;
        int ret = 0, ch;
        int irq;

        cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL);
        if (!cpsw)
                return -ENOMEM;

        platform_set_drvdata(pdev, cpsw);
        cpsw_slave_index = cpsw_slave_index_priv;

        cpsw->dev = dev;

        mode = devm_gpiod_get_array_optional(dev, "mode", GPIOD_OUT_LOW);
        if (IS_ERR(mode)) {
                ret = PTR_ERR(mode);
                dev_err(dev, "gpio request failed, ret %d\n", ret);
                return ret;
        }

        clk = devm_clk_get(dev, "fck");
        if (IS_ERR(clk)) {
                ret = PTR_ERR(clk);
                dev_err(dev, "fck is not found %d\n", ret);
                return ret;
        }
        cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000;

        ss_regs = devm_platform_get_and_ioremap_resource(pdev, 0, &ss_res);
        if (IS_ERR(ss_regs))
                return PTR_ERR(ss_regs);
        cpsw->regs = ss_regs;

        cpsw->wr_regs = devm_platform_ioremap_resource(pdev, 1);
        if (IS_ERR(cpsw->wr_regs))
                return PTR_ERR(cpsw->wr_regs);

        /* RX IRQ */
        irq = platform_get_irq(pdev, 1);
        if (irq < 0)
                return irq;
        cpsw->irqs_table[0] = irq;

        /* TX IRQ */
        irq = platform_get_irq(pdev, 2);
        if (irq < 0)
                return irq;
        cpsw->irqs_table[1] = irq;

        /* get misc irq*/
        irq = platform_get_irq(pdev, 3);
        if (irq <= 0)
                return irq;
        cpsw->misc_irq = irq;

        /*
         * This may be required here for child devices.
         */
        pm_runtime_enable(dev);

        /* Need to enable clocks with runtime PM api to access module
         * registers
         */
        ret = pm_runtime_resume_and_get(dev);
        if (ret < 0)
                goto clean_runtime_disable_ret;

        ret = cpsw_probe_dt(&cpsw->data, pdev);
        if (ret)
                goto clean_dt_ret;

        soc = soc_device_match(cpsw_soc_devices);
        if (soc)
                cpsw->quirk_irq = true;

        data = &cpsw->data;
        cpsw->slaves = devm_kcalloc(dev,
                                    data->slaves, sizeof(struct cpsw_slave),
                                    GFP_KERNEL);
        if (!cpsw->slaves) {
                ret = -ENOMEM;
                goto clean_dt_ret;
        }

        cpsw->rx_packet_max = max(rx_packet_max, CPSW_MAX_PACKET_SIZE);
        cpsw->descs_pool_size = descs_pool_size;

        ret = cpsw_init_common(cpsw, ss_regs, ale_ageout,
                               ss_res->start + CPSW2_BD_OFFSET,
                               descs_pool_size);
        if (ret)
                goto clean_dt_ret;

        ch = cpsw->quirk_irq ? 0 : 7;
        cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0);
        if (IS_ERR(cpsw->txv[0].ch)) {
                dev_err(dev, "error initializing tx dma channel\n");
                ret = PTR_ERR(cpsw->txv[0].ch);
                goto clean_cpts;
        }

        cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1);
        if (IS_ERR(cpsw->rxv[0].ch)) {
                dev_err(dev, "error initializing rx dma channel\n");
                ret = PTR_ERR(cpsw->rxv[0].ch);
                goto clean_cpts;
        }
        cpsw_split_res(cpsw);

        /* setup netdev */
        ndev = devm_alloc_etherdev_mqs(dev, sizeof(struct cpsw_priv),
                                       CPSW_MAX_QUEUES, CPSW_MAX_QUEUES);
        if (!ndev) {
                dev_err(dev, "error allocating net_device\n");
                ret = -ENOMEM;
                goto clean_cpts;
        }

        priv = netdev_priv(ndev);
        priv->cpsw = cpsw;
        priv->ndev = ndev;
        priv->dev  = dev;
        priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
        priv->emac_port = 0;
        INIT_WORK(&priv->rx_mode_work, cpsw_ndo_set_rx_mode_work);

        if (is_valid_ether_addr(data->slave_data[0].mac_addr)) {
                memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
                dev_info(dev, "Detected MACID = %pM\n", priv->mac_addr);
        } else {
                eth_random_addr(priv->mac_addr);
                dev_info(dev, "Random MACID = %pM\n", priv->mac_addr);
        }

        eth_hw_addr_set(ndev, priv->mac_addr);

        cpsw->slaves[0].ndev = ndev;

        ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;
        ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
                             NETDEV_XDP_ACT_NDO_XMIT;
        /* Hijack PHY timestamping requests in order to block them */
        if (!cpsw->data.dual_emac)
                ndev->see_all_hwtstamp_requests = true;

        ndev->netdev_ops = &cpsw_netdev_ops;
        ndev->ethtool_ops = &cpsw_ethtool_ops;
        netif_napi_add(ndev, &cpsw->napi_rx,
                       cpsw->quirk_irq ? cpsw_rx_poll : cpsw_rx_mq_poll);
        netif_napi_add_tx(ndev, &cpsw->napi_tx,
                          cpsw->quirk_irq ? cpsw_tx_poll : cpsw_tx_mq_poll);

        /* register the network device */
        SET_NETDEV_DEV(ndev, dev);
        ndev->dev.of_node = cpsw->slaves[0].data->slave_node;
        ret = register_netdev(ndev);
        if (ret) {
                dev_err(dev, "error registering net device\n");
                ret = -ENODEV;
                goto clean_cpts;
        }

        if (cpsw->data.dual_emac) {
                ret = cpsw_probe_dual_emac(priv);
                if (ret) {
                        cpsw_err(priv, probe, "error probe slave 2 emac interface\n");
                        goto clean_unregister_netdev_ret;
                }
        }

        /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and
         * MISC IRQs which are always kept disabled with this driver so
         * we will not request them.
         *
         * If anyone wants to implement support for those, make sure to
         * first request and append them to irqs_table array.
         */
        ret = devm_request_irq(dev, cpsw->irqs_table[0], cpsw_rx_interrupt,
                               0, dev_name(dev), cpsw);
        if (ret < 0) {
                dev_err(dev, "error attaching irq (%d)\n", ret);
                goto clean_unregister_netdev_ret;
        }


        ret = devm_request_irq(dev, cpsw->irqs_table[1], cpsw_tx_interrupt,
                               0, dev_name(&pdev->dev), cpsw);
        if (ret < 0) {
                dev_err(dev, "error attaching irq (%d)\n", ret);
                goto clean_unregister_netdev_ret;
        }

        if (!cpsw->cpts)
                goto skip_cpts;

        ret = devm_request_irq(&pdev->dev, cpsw->misc_irq, cpsw_misc_interrupt,
                               0, dev_name(&pdev->dev), cpsw);
        if (ret < 0) {
                dev_err(dev, "error attaching misc irq (%d)\n", ret);
                goto clean_unregister_netdev_ret;
        }

        /* Enable misc CPTS evnt_pend IRQ */
        cpts_set_irqpoll(cpsw->cpts, false);

skip_cpts:
        cpsw_notice(priv, probe,
                    "initialized device (regs %pa, irq %d, pool size %d)\n",
                    &ss_res->start, cpsw->irqs_table[0], descs_pool_size);

        pm_runtime_put(&pdev->dev);

        return 0;

clean_unregister_netdev_ret:
        unregister_netdev(ndev);
clean_cpts:
        cpts_release(cpsw->cpts);
        cpdma_ctlr_destroy(cpsw->dma);
clean_dt_ret:
        cpsw_remove_dt(pdev);
        pm_runtime_put_sync(&pdev->dev);
clean_runtime_disable_ret:
        pm_runtime_disable(&pdev->dev);
        return ret;
}

static void cpsw_remove(struct platform_device *pdev)
{
        struct cpsw_common *cpsw = platform_get_drvdata(pdev);
        struct net_device *ndev;
        struct cpsw_priv *priv;
        int i, ret;

        ret = pm_runtime_resume_and_get(&pdev->dev);
        if (ret < 0) {
                /* Note, if this error path is taken, we're leaking some
                 * resources.
                 */
                dev_err(&pdev->dev, "Failed to resume device (%pe)\n",
                        ERR_PTR(ret));
                return;
        }

        for (i = 0; i < cpsw->data.slaves; i++) {
                ndev = cpsw->slaves[i].ndev;
                if (!ndev)
                        continue;

                priv = netdev_priv(ndev);
                unregister_netdev(ndev);
                disable_work_sync(&priv->rx_mode_work);
        }

        cpts_release(cpsw->cpts);
        cpdma_ctlr_destroy(cpsw->dma);
        cpsw_remove_dt(pdev);
        pm_runtime_put_sync(&pdev->dev);
        pm_runtime_disable(&pdev->dev);
}

#ifdef CONFIG_PM_SLEEP
static int cpsw_suspend(struct device *dev)
{
        struct cpsw_common *cpsw = dev_get_drvdata(dev);
        int i;

        rtnl_lock();

        for (i = 0; i < cpsw->data.slaves; i++)
                if (cpsw->slaves[i].ndev)
                        if (netif_running(cpsw->slaves[i].ndev))
                                cpsw_ndo_stop(cpsw->slaves[i].ndev);

        rtnl_unlock();

        /* Select sleep pin state */
        pinctrl_pm_select_sleep_state(dev);

        return 0;
}

static int cpsw_resume(struct device *dev)
{
        struct cpsw_common *cpsw = dev_get_drvdata(dev);
        int i;

        /* Select default pin state */
        pinctrl_pm_select_default_state(dev);

        /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */
        rtnl_lock();

        for (i = 0; i < cpsw->data.slaves; i++)
                if (cpsw->slaves[i].ndev)
                        if (netif_running(cpsw->slaves[i].ndev))
                                cpsw_ndo_open(cpsw->slaves[i].ndev);

        rtnl_unlock();

        return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);

static struct platform_driver cpsw_driver = {
        .driver = {
                .name    = "cpsw",
                .pm      = &cpsw_pm_ops,
                .of_match_table = cpsw_of_mtable,
        },
        .probe = cpsw_probe,
        .remove = cpsw_remove,
};

module_platform_driver(cpsw_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>");
MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
MODULE_DESCRIPTION("TI CPSW Ethernet driver");