// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/*
 * Microsemi Ocelot Switch driver
 *
 * Copyright (c) 2017 Microsemi Corporation
 */
#include <linux/dsa/ocelot.h>
#include <linux/if_bridge.h>
#include <linux/ptp_classify.h>
#include <soc/mscc/ocelot_vcap.h>
#include "ocelot.h"
#include "ocelot_vcap.h"

#define TABLE_UPDATE_SLEEP_US 10
#define TABLE_UPDATE_TIMEOUT_US 100000
#define OCELOT_RSV_VLAN_RANGE_START 4000

struct ocelot_mact_entry {
        u8 mac[ETH_ALEN];
        u16 vid;
        enum macaccess_entry_type type;
};

/* Caller must hold &ocelot->mact_lock */
static inline u32 ocelot_mact_read_macaccess(struct ocelot *ocelot)
{
        return ocelot_read(ocelot, ANA_TABLES_MACACCESS);
}

/* Caller must hold &ocelot->mact_lock */
static inline int ocelot_mact_wait_for_completion(struct ocelot *ocelot)
{
        u32 val;

        return readx_poll_timeout(ocelot_mact_read_macaccess,
                ocelot, val,
                (val & ANA_TABLES_MACACCESS_MAC_TABLE_CMD_M) ==
                MACACCESS_CMD_IDLE,
                TABLE_UPDATE_SLEEP_US, TABLE_UPDATE_TIMEOUT_US);
}

/* Caller must hold &ocelot->mact_lock */
static void ocelot_mact_select(struct ocelot *ocelot,
                               const unsigned char mac[ETH_ALEN],
                               unsigned int vid)
{
        u32 macl = 0, mach = 0;

        /* Set the MAC address to handle and the vlan associated in a format
         * understood by the hardware.
         */
        mach |= vid    << 16;
        mach |= mac[0] << 8;
        mach |= mac[1] << 0;
        macl |= mac[2] << 24;
        macl |= mac[3] << 16;
        macl |= mac[4] << 8;
        macl |= mac[5] << 0;

        ocelot_write(ocelot, macl, ANA_TABLES_MACLDATA);
        ocelot_write(ocelot, mach, ANA_TABLES_MACHDATA);

}

static int __ocelot_mact_learn(struct ocelot *ocelot, int port,
                               const unsigned char mac[ETH_ALEN],
                               unsigned int vid, enum macaccess_entry_type type)
{
        u32 cmd = ANA_TABLES_MACACCESS_VALID |
                ANA_TABLES_MACACCESS_DEST_IDX(port) |
                ANA_TABLES_MACACCESS_ENTRYTYPE(type) |
                ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_LEARN);
        unsigned int mc_ports;
        int err;

        /* Set MAC_CPU_COPY if the CPU port is used by a multicast entry */
        if (type == ENTRYTYPE_MACv4)
                mc_ports = (mac[1] << 8) | mac[2];
        else if (type == ENTRYTYPE_MACv6)
                mc_ports = (mac[0] << 8) | mac[1];
        else
                mc_ports = 0;

        if (mc_ports & BIT(ocelot->num_phys_ports))
                cmd |= ANA_TABLES_MACACCESS_MAC_CPU_COPY;

        ocelot_mact_select(ocelot, mac, vid);

        /* Issue a write command */
        ocelot_write(ocelot, cmd, ANA_TABLES_MACACCESS);

        err = ocelot_mact_wait_for_completion(ocelot);

        return err;
}

int ocelot_mact_learn(struct ocelot *ocelot, int port,
                      const unsigned char mac[ETH_ALEN],
                      unsigned int vid, enum macaccess_entry_type type)
{
        int ret;

        mutex_lock(&ocelot->mact_lock);
        ret = __ocelot_mact_learn(ocelot, port, mac, vid, type);
        mutex_unlock(&ocelot->mact_lock);

        return ret;
}
EXPORT_SYMBOL(ocelot_mact_learn);

int ocelot_mact_forget(struct ocelot *ocelot,
                       const unsigned char mac[ETH_ALEN], unsigned int vid)
{
        int err;

        mutex_lock(&ocelot->mact_lock);

        ocelot_mact_select(ocelot, mac, vid);

        /* Issue a forget command */
        ocelot_write(ocelot,
                     ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_FORGET),
                     ANA_TABLES_MACACCESS);

        err = ocelot_mact_wait_for_completion(ocelot);

        mutex_unlock(&ocelot->mact_lock);

        return err;
}
EXPORT_SYMBOL(ocelot_mact_forget);

int ocelot_mact_lookup(struct ocelot *ocelot, int *dst_idx,
                       const unsigned char mac[ETH_ALEN],
                       unsigned int vid, enum macaccess_entry_type *type)
{
        int val;

        mutex_lock(&ocelot->mact_lock);

        ocelot_mact_select(ocelot, mac, vid);

        /* Issue a read command with MACACCESS_VALID=1. */
        ocelot_write(ocelot, ANA_TABLES_MACACCESS_VALID |
                     ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_READ),
                     ANA_TABLES_MACACCESS);

        if (ocelot_mact_wait_for_completion(ocelot)) {
                mutex_unlock(&ocelot->mact_lock);
                return -ETIMEDOUT;
        }

        /* Read back the entry flags */
        val = ocelot_read(ocelot, ANA_TABLES_MACACCESS);

        mutex_unlock(&ocelot->mact_lock);

        if (!(val & ANA_TABLES_MACACCESS_VALID))
                return -ENOENT;

        *dst_idx = ANA_TABLES_MACACCESS_DEST_IDX_X(val);
        *type = ANA_TABLES_MACACCESS_ENTRYTYPE_X(val);

        return 0;
}
EXPORT_SYMBOL(ocelot_mact_lookup);

int ocelot_mact_learn_streamdata(struct ocelot *ocelot, int dst_idx,
                                 const unsigned char mac[ETH_ALEN],
                                 unsigned int vid,
                                 enum macaccess_entry_type type,
                                 int sfid, int ssid)
{
        int ret;

        mutex_lock(&ocelot->mact_lock);

        ocelot_write(ocelot,
                     (sfid < 0 ? 0 : ANA_TABLES_STREAMDATA_SFID_VALID) |
                     ANA_TABLES_STREAMDATA_SFID(sfid) |
                     (ssid < 0 ? 0 : ANA_TABLES_STREAMDATA_SSID_VALID) |
                     ANA_TABLES_STREAMDATA_SSID(ssid),
                     ANA_TABLES_STREAMDATA);

        ret = __ocelot_mact_learn(ocelot, dst_idx, mac, vid, type);

        mutex_unlock(&ocelot->mact_lock);

        return ret;
}
EXPORT_SYMBOL(ocelot_mact_learn_streamdata);

static void ocelot_mact_init(struct ocelot *ocelot)
{
        /* Configure the learning mode entries attributes:
         * - Do not copy the frame to the CPU extraction queues.
         * - Use the vlan and mac_cpoy for dmac lookup.
         */
        ocelot_rmw(ocelot, 0,
                   ANA_AGENCTRL_LEARN_CPU_COPY | ANA_AGENCTRL_IGNORE_DMAC_FLAGS
                   | ANA_AGENCTRL_LEARN_FWD_KILL
                   | ANA_AGENCTRL_LEARN_IGNORE_VLAN,
                   ANA_AGENCTRL);

        /* Clear the MAC table. We are not concurrent with anyone, so
         * holding &ocelot->mact_lock is pointless.
         */
        ocelot_write(ocelot, MACACCESS_CMD_INIT, ANA_TABLES_MACACCESS);
}

static void ocelot_vcap_enable(struct ocelot *ocelot, int port)
{
        ocelot_write_gix(ocelot, ANA_PORT_VCAP_S2_CFG_S2_ENA |
                         ANA_PORT_VCAP_S2_CFG_S2_IP6_CFG(0xa),
                         ANA_PORT_VCAP_S2_CFG, port);

        ocelot_write_gix(ocelot, ANA_PORT_VCAP_CFG_S1_ENA,
                         ANA_PORT_VCAP_CFG, port);

        ocelot_rmw_gix(ocelot, REW_PORT_CFG_ES0_EN,
                       REW_PORT_CFG_ES0_EN,
                       REW_PORT_CFG, port);
}

static int ocelot_single_vlan_aware_bridge(struct ocelot *ocelot,
                                           struct netlink_ext_ack *extack)
{
        struct net_device *bridge = NULL;
        int port;

        for (port = 0; port < ocelot->num_phys_ports; port++) {
                struct ocelot_port *ocelot_port = ocelot->ports[port];

                if (!ocelot_port || !ocelot_port->bridge ||
                    !br_vlan_enabled(ocelot_port->bridge))
                        continue;

                if (!bridge) {
                        bridge = ocelot_port->bridge;
                        continue;
                }

                if (bridge == ocelot_port->bridge)
                        continue;

                NL_SET_ERR_MSG_MOD(extack,
                                   "Only one VLAN-aware bridge is supported");
                return -EBUSY;
        }

        return 0;
}

static inline u32 ocelot_vlant_read_vlanaccess(struct ocelot *ocelot)
{
        return ocelot_read(ocelot, ANA_TABLES_VLANACCESS);
}

static inline int ocelot_vlant_wait_for_completion(struct ocelot *ocelot)
{
        u32 val;

        return readx_poll_timeout(ocelot_vlant_read_vlanaccess,
                ocelot,
                val,
                (val & ANA_TABLES_VLANACCESS_VLAN_TBL_CMD_M) ==
                ANA_TABLES_VLANACCESS_CMD_IDLE,
                TABLE_UPDATE_SLEEP_US, TABLE_UPDATE_TIMEOUT_US);
}

static int ocelot_vlant_set_mask(struct ocelot *ocelot, u16 vid, u32 mask)
{
        /* Select the VID to configure */
        ocelot_write(ocelot, ANA_TABLES_VLANTIDX_V_INDEX(vid),
                     ANA_TABLES_VLANTIDX);
        /* Set the vlan port members mask and issue a write command */
        ocelot_write(ocelot, ANA_TABLES_VLANACCESS_VLAN_PORT_MASK(mask) |
                             ANA_TABLES_VLANACCESS_CMD_WRITE,
                     ANA_TABLES_VLANACCESS);

        return ocelot_vlant_wait_for_completion(ocelot);
}

static int ocelot_port_num_untagged_vlans(struct ocelot *ocelot, int port)
{
        struct ocelot_bridge_vlan *vlan;
        int num_untagged = 0;

        list_for_each_entry(vlan, &ocelot->vlans, list) {
                if (!(vlan->portmask & BIT(port)))
                        continue;

                if (vlan->untagged & BIT(port))
                        num_untagged++;
        }

        return num_untagged;
}

static int ocelot_port_num_tagged_vlans(struct ocelot *ocelot, int port)
{
        struct ocelot_bridge_vlan *vlan;
        int num_tagged = 0;

        list_for_each_entry(vlan, &ocelot->vlans, list) {
                if (!(vlan->portmask & BIT(port)))
                        continue;

                if (!(vlan->untagged & BIT(port)))
                        num_tagged++;
        }

        return num_tagged;
}

/* We use native VLAN when we have to mix egress-tagged VLANs with exactly
 * _one_ egress-untagged VLAN (_the_ native VLAN)
 */
static bool ocelot_port_uses_native_vlan(struct ocelot *ocelot, int port)
{
        return ocelot_port_num_tagged_vlans(ocelot, port) &&
               ocelot_port_num_untagged_vlans(ocelot, port) == 1;
}

static struct ocelot_bridge_vlan *
ocelot_port_find_native_vlan(struct ocelot *ocelot, int port)
{
        struct ocelot_bridge_vlan *vlan;

        list_for_each_entry(vlan, &ocelot->vlans, list)
                if (vlan->portmask & BIT(port) && vlan->untagged & BIT(port))
                        return vlan;

        return NULL;
}

/* Keep in sync REW_TAG_CFG_TAG_CFG and, if applicable,
 * REW_PORT_VLAN_CFG_PORT_VID, with the bridge VLAN table and VLAN awareness
 * state of the port.
 */
static void ocelot_port_manage_port_tag(struct ocelot *ocelot, int port)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        enum ocelot_port_tag_config tag_cfg;
        bool uses_native_vlan = false;

        if (ocelot_port->vlan_aware) {
                uses_native_vlan = ocelot_port_uses_native_vlan(ocelot, port);

                if (uses_native_vlan)
                        tag_cfg = OCELOT_PORT_TAG_NATIVE;
                else if (ocelot_port_num_untagged_vlans(ocelot, port))
                        tag_cfg = OCELOT_PORT_TAG_DISABLED;
                else
                        tag_cfg = OCELOT_PORT_TAG_TRUNK;
        } else {
                tag_cfg = OCELOT_PORT_TAG_DISABLED;
        }

        ocelot_rmw_gix(ocelot, REW_TAG_CFG_TAG_CFG(tag_cfg),
                       REW_TAG_CFG_TAG_CFG_M,
                       REW_TAG_CFG, port);

        if (uses_native_vlan) {
                struct ocelot_bridge_vlan *native_vlan;

                /* Not having a native VLAN is impossible, because
                 * ocelot_port_num_untagged_vlans has returned 1.
                 * So there is no use in checking for NULL here.
                 */
                native_vlan = ocelot_port_find_native_vlan(ocelot, port);

                ocelot_rmw_gix(ocelot,
                               REW_PORT_VLAN_CFG_PORT_VID(native_vlan->vid),
                               REW_PORT_VLAN_CFG_PORT_VID_M,
                               REW_PORT_VLAN_CFG, port);
        }
}

int ocelot_bridge_num_find(struct ocelot *ocelot,
                           const struct net_device *bridge)
{
        int port;

        for (port = 0; port < ocelot->num_phys_ports; port++) {
                struct ocelot_port *ocelot_port = ocelot->ports[port];

                if (ocelot_port && ocelot_port->bridge == bridge)
                        return ocelot_port->bridge_num;
        }

        return -1;
}
EXPORT_SYMBOL_GPL(ocelot_bridge_num_find);

static u16 ocelot_vlan_unaware_pvid(struct ocelot *ocelot,
                                    const struct net_device *bridge)
{
        int bridge_num;

        /* Standalone ports use VID 0 */
        if (!bridge)
                return 0;

        bridge_num = ocelot_bridge_num_find(ocelot, bridge);
        if (WARN_ON(bridge_num < 0))
                return 0;

        /* VLAN-unaware bridges use a reserved VID going from 4095 downwards */
        return VLAN_N_VID - bridge_num - 1;
}

/* Default vlan to clasify for untagged frames (may be zero) */
static void ocelot_port_set_pvid(struct ocelot *ocelot, int port,
                                 const struct ocelot_bridge_vlan *pvid_vlan)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        u16 pvid = ocelot_vlan_unaware_pvid(ocelot, ocelot_port->bridge);
        u32 val = 0;

        ocelot_port->pvid_vlan = pvid_vlan;

        if (ocelot_port->vlan_aware && pvid_vlan)
                pvid = pvid_vlan->vid;

        ocelot_rmw_gix(ocelot,
                       ANA_PORT_VLAN_CFG_VLAN_VID(pvid),
                       ANA_PORT_VLAN_CFG_VLAN_VID_M,
                       ANA_PORT_VLAN_CFG, port);

        /* If there's no pvid, we should drop not only untagged traffic (which
         * happens automatically), but also 802.1p traffic which gets
         * classified to VLAN 0, but that is always in our RX filter, so it
         * would get accepted were it not for this setting.
         */
        if (!pvid_vlan && ocelot_port->vlan_aware)
                val = ANA_PORT_DROP_CFG_DROP_PRIO_S_TAGGED_ENA |
                      ANA_PORT_DROP_CFG_DROP_PRIO_C_TAGGED_ENA;

        ocelot_rmw_gix(ocelot, val,
                       ANA_PORT_DROP_CFG_DROP_PRIO_S_TAGGED_ENA |
                       ANA_PORT_DROP_CFG_DROP_PRIO_C_TAGGED_ENA,
                       ANA_PORT_DROP_CFG, port);
}

static struct ocelot_bridge_vlan *ocelot_bridge_vlan_find(struct ocelot *ocelot,
                                                          u16 vid)
{
        struct ocelot_bridge_vlan *vlan;

        list_for_each_entry(vlan, &ocelot->vlans, list)
                if (vlan->vid == vid)
                        return vlan;

        return NULL;
}

static int ocelot_vlan_member_add(struct ocelot *ocelot, int port, u16 vid,
                                  bool untagged)
{
        struct ocelot_bridge_vlan *vlan = ocelot_bridge_vlan_find(ocelot, vid);
        unsigned long portmask;
        int err;

        if (vlan) {
                portmask = vlan->portmask | BIT(port);

                err = ocelot_vlant_set_mask(ocelot, vid, portmask);
                if (err)
                        return err;

                vlan->portmask = portmask;
                /* Bridge VLANs can be overwritten with a different
                 * egress-tagging setting, so make sure to override an untagged
                 * with a tagged VID if that's going on.
                 */
                if (untagged)
                        vlan->untagged |= BIT(port);
                else
                        vlan->untagged &= ~BIT(port);

                return 0;
        }

        vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
        if (!vlan)
                return -ENOMEM;

        portmask = BIT(port);

        err = ocelot_vlant_set_mask(ocelot, vid, portmask);
        if (err) {
                kfree(vlan);
                return err;
        }

        vlan->vid = vid;
        vlan->portmask = portmask;
        if (untagged)
                vlan->untagged = BIT(port);
        INIT_LIST_HEAD(&vlan->list);
        list_add_tail(&vlan->list, &ocelot->vlans);

        return 0;
}

static int ocelot_vlan_member_del(struct ocelot *ocelot, int port, u16 vid)
{
        struct ocelot_bridge_vlan *vlan = ocelot_bridge_vlan_find(ocelot, vid);
        unsigned long portmask;
        int err;

        if (!vlan)
                return 0;

        portmask = vlan->portmask & ~BIT(port);

        err = ocelot_vlant_set_mask(ocelot, vid, portmask);
        if (err)
                return err;

        vlan->portmask = portmask;
        if (vlan->portmask)
                return 0;

        list_del(&vlan->list);
        kfree(vlan);

        return 0;
}

static int ocelot_add_vlan_unaware_pvid(struct ocelot *ocelot, int port,
                                        const struct net_device *bridge)
{
        u16 vid = ocelot_vlan_unaware_pvid(ocelot, bridge);

        return ocelot_vlan_member_add(ocelot, port, vid, true);
}

static int ocelot_del_vlan_unaware_pvid(struct ocelot *ocelot, int port,
                                        const struct net_device *bridge)
{
        u16 vid = ocelot_vlan_unaware_pvid(ocelot, bridge);

        return ocelot_vlan_member_del(ocelot, port, vid);
}

int ocelot_port_vlan_filtering(struct ocelot *ocelot, int port,
                               bool vlan_aware, struct netlink_ext_ack *extack)
{
        struct ocelot_vcap_block *block = &ocelot->block[VCAP_IS1];
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        struct ocelot_vcap_filter *filter;
        int err = 0;
        u32 val;

        list_for_each_entry(filter, &block->rules, list) {
                if (filter->ingress_port_mask & BIT(port) &&
                    filter->action.vid_replace_ena) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Cannot change VLAN state with vlan modify rules active");
                        return -EBUSY;
                }
        }

        err = ocelot_single_vlan_aware_bridge(ocelot, extack);
        if (err)
                return err;

        if (vlan_aware)
                err = ocelot_del_vlan_unaware_pvid(ocelot, port,
                                                   ocelot_port->bridge);
        else if (ocelot_port->bridge)
                err = ocelot_add_vlan_unaware_pvid(ocelot, port,
                                                   ocelot_port->bridge);
        if (err)
                return err;

        ocelot_port->vlan_aware = vlan_aware;

        if (vlan_aware)
                val = ANA_PORT_VLAN_CFG_VLAN_AWARE_ENA |
                      ANA_PORT_VLAN_CFG_VLAN_POP_CNT(1);
        else
                val = 0;
        ocelot_rmw_gix(ocelot, val,
                       ANA_PORT_VLAN_CFG_VLAN_AWARE_ENA |
                       ANA_PORT_VLAN_CFG_VLAN_POP_CNT_M,
                       ANA_PORT_VLAN_CFG, port);

        ocelot_port_set_pvid(ocelot, port, ocelot_port->pvid_vlan);
        ocelot_port_manage_port_tag(ocelot, port);

        return 0;
}
EXPORT_SYMBOL(ocelot_port_vlan_filtering);

int ocelot_vlan_prepare(struct ocelot *ocelot, int port, u16 vid, bool pvid,
                        bool untagged, struct netlink_ext_ack *extack)
{
        if (untagged) {
                /* We are adding an egress-tagged VLAN */
                if (ocelot_port_uses_native_vlan(ocelot, port)) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Port with egress-tagged VLANs cannot have more than one egress-untagged (native) VLAN");
                        return -EBUSY;
                }
        } else {
                /* We are adding an egress-tagged VLAN */
                if (ocelot_port_num_untagged_vlans(ocelot, port) > 1) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Port with more than one egress-untagged VLAN cannot have egress-tagged VLANs");
                        return -EBUSY;
                }
        }

        if (vid > OCELOT_RSV_VLAN_RANGE_START) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "VLAN range 4000-4095 reserved for VLAN-unaware bridging");
                return -EBUSY;
        }

        return 0;
}
EXPORT_SYMBOL(ocelot_vlan_prepare);

int ocelot_vlan_add(struct ocelot *ocelot, int port, u16 vid, bool pvid,
                    bool untagged)
{
        int err;

        /* Ignore VID 0 added to our RX filter by the 8021q module, since
         * that collides with OCELOT_STANDALONE_PVID and changes it from
         * egress-untagged to egress-tagged.
         */
        if (!vid)
                return 0;

        err = ocelot_vlan_member_add(ocelot, port, vid, untagged);
        if (err)
                return err;

        /* Default ingress vlan classification */
        if (pvid)
                ocelot_port_set_pvid(ocelot, port,
                                     ocelot_bridge_vlan_find(ocelot, vid));

        /* Untagged egress vlan clasification */
        ocelot_port_manage_port_tag(ocelot, port);

        return 0;
}
EXPORT_SYMBOL(ocelot_vlan_add);

int ocelot_vlan_del(struct ocelot *ocelot, int port, u16 vid)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        bool del_pvid = false;
        int err;

        if (!vid)
                return 0;

        if (ocelot_port->pvid_vlan && ocelot_port->pvid_vlan->vid == vid)
                del_pvid = true;

        err = ocelot_vlan_member_del(ocelot, port, vid);
        if (err)
                return err;

        /* Ingress */
        if (del_pvid)
                ocelot_port_set_pvid(ocelot, port, NULL);

        /* Egress */
        ocelot_port_manage_port_tag(ocelot, port);

        return 0;
}
EXPORT_SYMBOL(ocelot_vlan_del);

static void ocelot_vlan_init(struct ocelot *ocelot)
{
        unsigned long all_ports = GENMASK(ocelot->num_phys_ports - 1, 0);
        u16 port, vid;

        /* Clear VLAN table, by default all ports are members of all VLANs */
        ocelot_write(ocelot, ANA_TABLES_VLANACCESS_CMD_INIT,
                     ANA_TABLES_VLANACCESS);
        ocelot_vlant_wait_for_completion(ocelot);

        /* Configure the port VLAN memberships */
        for (vid = 1; vid < VLAN_N_VID; vid++)
                ocelot_vlant_set_mask(ocelot, vid, 0);

        /* We need VID 0 to get traffic on standalone ports.
         * It is added automatically if the 8021q module is loaded, but we
         * can't rely on that since it might not be.
         */
        ocelot_vlant_set_mask(ocelot, OCELOT_STANDALONE_PVID, all_ports);

        /* Set vlan ingress filter mask to all ports but the CPU port by
         * default.
         */
        ocelot_write(ocelot, all_ports, ANA_VLANMASK);

        for (port = 0; port < ocelot->num_phys_ports; port++) {
                ocelot_write_gix(ocelot, 0, REW_PORT_VLAN_CFG, port);
                ocelot_write_gix(ocelot, 0, REW_TAG_CFG, port);
        }
}

static u32 ocelot_read_eq_avail(struct ocelot *ocelot, int port)
{
        return ocelot_read_rix(ocelot, QSYS_SW_STATUS, port);
}

static int ocelot_port_flush(struct ocelot *ocelot, int port)
{
        unsigned int pause_ena;
        int err, val;

        /* Disable dequeuing from the egress queues */
        ocelot_rmw_rix(ocelot, QSYS_PORT_MODE_DEQUEUE_DIS,
                       QSYS_PORT_MODE_DEQUEUE_DIS,
                       QSYS_PORT_MODE, port);

        /* Disable flow control */
        ocelot_fields_read(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA, &pause_ena);
        ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA, 0);

        /* Disable priority flow control */
        ocelot_fields_write(ocelot, port,
                            QSYS_SWITCH_PORT_MODE_TX_PFC_ENA, 0);

        /* Wait at least the time it takes to receive a frame of maximum length
         * at the port.
         * Worst-case delays for 10 kilobyte jumbo frames are:
         * 8 ms on a 10M port
         * 800 μs on a 100M port
         * 80 μs on a 1G port
         * 32 μs on a 2.5G port
         */
        usleep_range(8000, 10000);

        /* Disable half duplex backpressure. */
        ocelot_rmw_rix(ocelot, 0, SYS_FRONT_PORT_MODE_HDX_MODE,
                       SYS_FRONT_PORT_MODE, port);

        /* Flush the queues associated with the port. */
        ocelot_rmw_gix(ocelot, REW_PORT_CFG_FLUSH_ENA, REW_PORT_CFG_FLUSH_ENA,
                       REW_PORT_CFG, port);

        /* Enable dequeuing from the egress queues. */
        ocelot_rmw_rix(ocelot, 0, QSYS_PORT_MODE_DEQUEUE_DIS, QSYS_PORT_MODE,
                       port);

        /* Wait until flushing is complete. */
        err = read_poll_timeout(ocelot_read_eq_avail, val, !val,
                                100, 2000000, false, ocelot, port);

        /* Clear flushing again. */
        ocelot_rmw_gix(ocelot, 0, REW_PORT_CFG_FLUSH_ENA, REW_PORT_CFG, port);

        /* Re-enable flow control */
        ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA, pause_ena);

        return err;
}

void ocelot_phylink_mac_link_down(struct ocelot *ocelot, int port,
                                  unsigned int link_an_mode,
                                  phy_interface_t interface,
                                  unsigned long quirks)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        int err;

        ocelot_port->speed = SPEED_UNKNOWN;

        ocelot_port_rmwl(ocelot_port, 0, DEV_MAC_ENA_CFG_RX_ENA,
                         DEV_MAC_ENA_CFG);

        if (ocelot->ops->cut_through_fwd) {
                mutex_lock(&ocelot->fwd_domain_lock);
                ocelot->ops->cut_through_fwd(ocelot);
                mutex_unlock(&ocelot->fwd_domain_lock);
        }

        ocelot_fields_write(ocelot, port, QSYS_SWITCH_PORT_MODE_PORT_ENA, 0);

        err = ocelot_port_flush(ocelot, port);
        if (err)
                dev_err(ocelot->dev, "failed to flush port %d: %d\n",
                        port, err);

        /* Put the port in reset. */
        if (interface != PHY_INTERFACE_MODE_QSGMII ||
            !(quirks & OCELOT_QUIRK_QSGMII_PORTS_MUST_BE_UP))
                ocelot_port_rmwl(ocelot_port,
                                 DEV_CLOCK_CFG_MAC_TX_RST |
                                 DEV_CLOCK_CFG_MAC_RX_RST,
                                 DEV_CLOCK_CFG_MAC_TX_RST |
                                 DEV_CLOCK_CFG_MAC_RX_RST,
                                 DEV_CLOCK_CFG);
}
EXPORT_SYMBOL_GPL(ocelot_phylink_mac_link_down);

void ocelot_phylink_mac_link_up(struct ocelot *ocelot, int port,
                                struct phy_device *phydev,
                                unsigned int link_an_mode,
                                phy_interface_t interface,
                                int speed, int duplex,
                                bool tx_pause, bool rx_pause,
                                unsigned long quirks)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        int mac_speed, mode = 0;
        u32 mac_fc_cfg;

        ocelot_port->speed = speed;

        /* The MAC might be integrated in systems where the MAC speed is fixed
         * and it's the PCS who is performing the rate adaptation, so we have
         * to write "1000Mbps" into the LINK_SPEED field of DEV_CLOCK_CFG
         * (which is also its default value).
         */
        if ((quirks & OCELOT_QUIRK_PCS_PERFORMS_RATE_ADAPTATION) ||
            speed == SPEED_1000) {
                mac_speed = OCELOT_SPEED_1000;
                mode = DEV_MAC_MODE_CFG_GIGA_MODE_ENA;
        } else if (speed == SPEED_2500) {
                mac_speed = OCELOT_SPEED_2500;
                mode = DEV_MAC_MODE_CFG_GIGA_MODE_ENA;
        } else if (speed == SPEED_100) {
                mac_speed = OCELOT_SPEED_100;
        } else {
                mac_speed = OCELOT_SPEED_10;
        }

        if (duplex == DUPLEX_FULL)
                mode |= DEV_MAC_MODE_CFG_FDX_ENA;

        ocelot_port_writel(ocelot_port, mode, DEV_MAC_MODE_CFG);

        /* Take port out of reset by clearing the MAC_TX_RST, MAC_RX_RST and
         * PORT_RST bits in DEV_CLOCK_CFG.
         */
        ocelot_port_writel(ocelot_port, DEV_CLOCK_CFG_LINK_SPEED(mac_speed),
                           DEV_CLOCK_CFG);

        switch (speed) {
        case SPEED_10:
                mac_fc_cfg = SYS_MAC_FC_CFG_FC_LINK_SPEED(OCELOT_SPEED_10);
                break;
        case SPEED_100:
                mac_fc_cfg = SYS_MAC_FC_CFG_FC_LINK_SPEED(OCELOT_SPEED_100);
                break;
        case SPEED_1000:
        case SPEED_2500:
                mac_fc_cfg = SYS_MAC_FC_CFG_FC_LINK_SPEED(OCELOT_SPEED_1000);
                break;
        default:
                dev_err(ocelot->dev, "Unsupported speed on port %d: %d\n",
                        port, speed);
                return;
        }

        /* Handle RX pause in all cases, with 2500base-X this is used for rate
         * adaptation.
         */
        mac_fc_cfg |= SYS_MAC_FC_CFG_RX_FC_ENA;

        if (tx_pause)
                mac_fc_cfg |= SYS_MAC_FC_CFG_TX_FC_ENA |
                              SYS_MAC_FC_CFG_PAUSE_VAL_CFG(0xffff) |
                              SYS_MAC_FC_CFG_FC_LATENCY_CFG(0x7) |
                              SYS_MAC_FC_CFG_ZERO_PAUSE_ENA;

        /* Flow control. Link speed is only used here to evaluate the time
         * specification in incoming pause frames.
         */
        ocelot_write_rix(ocelot, mac_fc_cfg, SYS_MAC_FC_CFG, port);

        ocelot_write_rix(ocelot, 0, ANA_POL_FLOWC, port);

        /* Don't attempt to send PAUSE frames on the NPI port, it's broken */
        if (port != ocelot->npi)
                ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA,
                                    tx_pause);

        /* Undo the effects of ocelot_phylink_mac_link_down:
         * enable MAC module
         */
        ocelot_port_writel(ocelot_port, DEV_MAC_ENA_CFG_RX_ENA |
                           DEV_MAC_ENA_CFG_TX_ENA, DEV_MAC_ENA_CFG);

        /* If the port supports cut-through forwarding, update the masks before
         * enabling forwarding on the port.
         */
        if (ocelot->ops->cut_through_fwd) {
                mutex_lock(&ocelot->fwd_domain_lock);
                ocelot->ops->cut_through_fwd(ocelot);
                mutex_unlock(&ocelot->fwd_domain_lock);
        }

        /* Core: Enable port for frame transfer */
        ocelot_fields_write(ocelot, port,
                            QSYS_SWITCH_PORT_MODE_PORT_ENA, 1);
}
EXPORT_SYMBOL_GPL(ocelot_phylink_mac_link_up);

static int ocelot_port_add_txtstamp_skb(struct ocelot *ocelot, int port,
                                        struct sk_buff *clone)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        unsigned long flags;

        spin_lock_irqsave(&ocelot->ts_id_lock, flags);

        if (ocelot_port->ptp_skbs_in_flight == OCELOT_MAX_PTP_ID ||
            ocelot->ptp_skbs_in_flight == OCELOT_PTP_FIFO_SIZE) {
                spin_unlock_irqrestore(&ocelot->ts_id_lock, flags);
                return -EBUSY;
        }

        skb_shinfo(clone)->tx_flags |= SKBTX_IN_PROGRESS;
        /* Store timestamp ID in OCELOT_SKB_CB(clone)->ts_id */
        OCELOT_SKB_CB(clone)->ts_id = ocelot_port->ts_id;

        ocelot_port->ts_id++;
        if (ocelot_port->ts_id == OCELOT_MAX_PTP_ID)
                ocelot_port->ts_id = 0;

        ocelot_port->ptp_skbs_in_flight++;
        ocelot->ptp_skbs_in_flight++;

        skb_queue_tail(&ocelot_port->tx_skbs, clone);

        spin_unlock_irqrestore(&ocelot->ts_id_lock, flags);

        return 0;
}

static bool ocelot_ptp_is_onestep_sync(struct sk_buff *skb,
                                       unsigned int ptp_class)
{
        struct ptp_header *hdr;
        u8 msgtype, twostep;

        hdr = ptp_parse_header(skb, ptp_class);
        if (!hdr)
                return false;

        msgtype = ptp_get_msgtype(hdr, ptp_class);
        twostep = hdr->flag_field[0] & 0x2;

        if (msgtype == PTP_MSGTYPE_SYNC && twostep == 0)
                return true;

        return false;
}

int ocelot_port_txtstamp_request(struct ocelot *ocelot, int port,
                                 struct sk_buff *skb,
                                 struct sk_buff **clone)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        u8 ptp_cmd = ocelot_port->ptp_cmd;
        unsigned int ptp_class;
        int err;

        /* Don't do anything if PTP timestamping not enabled */
        if (!ptp_cmd)
                return 0;

        ptp_class = ptp_classify_raw(skb);
        if (ptp_class == PTP_CLASS_NONE)
                return -EINVAL;

        /* Store ptp_cmd in OCELOT_SKB_CB(skb)->ptp_cmd */
        if (ptp_cmd == IFH_REW_OP_ORIGIN_PTP) {
                if (ocelot_ptp_is_onestep_sync(skb, ptp_class)) {
                        OCELOT_SKB_CB(skb)->ptp_cmd = ptp_cmd;
                        return 0;
                }

                /* Fall back to two-step timestamping */
                ptp_cmd = IFH_REW_OP_TWO_STEP_PTP;
        }

        if (ptp_cmd == IFH_REW_OP_TWO_STEP_PTP) {
                *clone = skb_clone_sk(skb);
                if (!(*clone))
                        return -ENOMEM;

                err = ocelot_port_add_txtstamp_skb(ocelot, port, *clone);
                if (err)
                        return err;

                OCELOT_SKB_CB(skb)->ptp_cmd = ptp_cmd;
                OCELOT_SKB_CB(*clone)->ptp_class = ptp_class;
        }

        return 0;
}
EXPORT_SYMBOL(ocelot_port_txtstamp_request);

static void ocelot_get_hwtimestamp(struct ocelot *ocelot,
                                   struct timespec64 *ts)
{
        unsigned long flags;
        u32 val;

        spin_lock_irqsave(&ocelot->ptp_clock_lock, flags);

        /* Read current PTP time to get seconds */
        val = ocelot_read_rix(ocelot, PTP_PIN_CFG, TOD_ACC_PIN);

        val &= ~(PTP_PIN_CFG_SYNC | PTP_PIN_CFG_ACTION_MASK | PTP_PIN_CFG_DOM);
        val |= PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_SAVE);
        ocelot_write_rix(ocelot, val, PTP_PIN_CFG, TOD_ACC_PIN);
        ts->tv_sec = ocelot_read_rix(ocelot, PTP_PIN_TOD_SEC_LSB, TOD_ACC_PIN);

        /* Read packet HW timestamp from FIFO */
        val = ocelot_read(ocelot, SYS_PTP_TXSTAMP);
        ts->tv_nsec = SYS_PTP_TXSTAMP_PTP_TXSTAMP(val);

        /* Sec has incremented since the ts was registered */
        if ((ts->tv_sec & 0x1) != !!(val & SYS_PTP_TXSTAMP_PTP_TXSTAMP_SEC))
                ts->tv_sec--;

        spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags);
}

static bool ocelot_validate_ptp_skb(struct sk_buff *clone, u16 seqid)
{
        struct ptp_header *hdr;

        hdr = ptp_parse_header(clone, OCELOT_SKB_CB(clone)->ptp_class);
        if (WARN_ON(!hdr))
                return false;

        return seqid == ntohs(hdr->sequence_id);
}

void ocelot_get_txtstamp(struct ocelot *ocelot)
{
        int budget = OCELOT_PTP_QUEUE_SZ;

        while (budget--) {
                struct sk_buff *skb, *skb_tmp, *skb_match = NULL;
                struct skb_shared_hwtstamps shhwtstamps;
                u32 val, id, seqid, txport;
                struct ocelot_port *port;
                struct timespec64 ts;
                unsigned long flags;

                val = ocelot_read(ocelot, SYS_PTP_STATUS);

                /* Check if a timestamp can be retrieved */
                if (!(val & SYS_PTP_STATUS_PTP_MESS_VLD))
                        break;

                WARN_ON(val & SYS_PTP_STATUS_PTP_OVFL);

                /* Retrieve the ts ID and Tx port */
                id = SYS_PTP_STATUS_PTP_MESS_ID_X(val);
                txport = SYS_PTP_STATUS_PTP_MESS_TXPORT_X(val);
                seqid = SYS_PTP_STATUS_PTP_MESS_SEQ_ID(val);

                port = ocelot->ports[txport];

                spin_lock(&ocelot->ts_id_lock);
                port->ptp_skbs_in_flight--;
                ocelot->ptp_skbs_in_flight--;
                spin_unlock(&ocelot->ts_id_lock);

                /* Retrieve its associated skb */
try_again:
                spin_lock_irqsave(&port->tx_skbs.lock, flags);

                skb_queue_walk_safe(&port->tx_skbs, skb, skb_tmp) {
                        if (OCELOT_SKB_CB(skb)->ts_id != id)
                                continue;
                        __skb_unlink(skb, &port->tx_skbs);
                        skb_match = skb;
                        break;
                }

                spin_unlock_irqrestore(&port->tx_skbs.lock, flags);

                if (WARN_ON(!skb_match))
                        continue;

                if (!ocelot_validate_ptp_skb(skb_match, seqid)) {
                        dev_err_ratelimited(ocelot->dev,
                                            "port %d received stale TX timestamp for seqid %d, discarding\n",
                                            txport, seqid);
                        dev_kfree_skb_any(skb);
                        goto try_again;
                }

                /* Get the h/w timestamp */
                ocelot_get_hwtimestamp(ocelot, &ts);

                /* Set the timestamp into the skb */
                memset(&shhwtstamps, 0, sizeof(shhwtstamps));
                shhwtstamps.hwtstamp = ktime_set(ts.tv_sec, ts.tv_nsec);
                skb_complete_tx_timestamp(skb_match, &shhwtstamps);

                /* Next ts */
                ocelot_write(ocelot, SYS_PTP_NXT_PTP_NXT, SYS_PTP_NXT);
        }
}
EXPORT_SYMBOL(ocelot_get_txtstamp);

static int ocelot_rx_frame_word(struct ocelot *ocelot, u8 grp, bool ifh,
                                u32 *rval)
{
        u32 bytes_valid, val;

        val = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
        if (val == XTR_NOT_READY) {
                if (ifh)
                        return -EIO;

                do {
                        val = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
                } while (val == XTR_NOT_READY);
        }

        switch (val) {
        case XTR_ABORT:
                return -EIO;
        case XTR_EOF_0:
        case XTR_EOF_1:
        case XTR_EOF_2:
        case XTR_EOF_3:
        case XTR_PRUNED:
                bytes_valid = XTR_VALID_BYTES(val);
                val = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
                if (val == XTR_ESCAPE)
                        *rval = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
                else
                        *rval = val;

                return bytes_valid;
        case XTR_ESCAPE:
                *rval = ocelot_read_rix(ocelot, QS_XTR_RD, grp);

                return 4;
        default:
                *rval = val;

                return 4;
        }
}

static int ocelot_xtr_poll_xfh(struct ocelot *ocelot, int grp, u32 *xfh)
{
        int i, err = 0;

        for (i = 0; i < OCELOT_TAG_LEN / 4; i++) {
                err = ocelot_rx_frame_word(ocelot, grp, true, &xfh[i]);
                if (err != 4)
                        return (err < 0) ? err : -EIO;
        }

        return 0;
}

void ocelot_ptp_rx_timestamp(struct ocelot *ocelot, struct sk_buff *skb,
                             u64 timestamp)
{
        struct skb_shared_hwtstamps *shhwtstamps;
        u64 tod_in_ns, full_ts_in_ns;
        struct timespec64 ts;

        ocelot_ptp_gettime64(&ocelot->ptp_info, &ts);

        tod_in_ns = ktime_set(ts.tv_sec, ts.tv_nsec);
        if ((tod_in_ns & 0xffffffff) < timestamp)
                full_ts_in_ns = (((tod_in_ns >> 32) - 1) << 32) |
                                timestamp;
        else
                full_ts_in_ns = (tod_in_ns & GENMASK_ULL(63, 32)) |
                                timestamp;

        shhwtstamps = skb_hwtstamps(skb);
        memset(shhwtstamps, 0, sizeof(struct skb_shared_hwtstamps));
        shhwtstamps->hwtstamp = full_ts_in_ns;
}
EXPORT_SYMBOL(ocelot_ptp_rx_timestamp);

int ocelot_xtr_poll_frame(struct ocelot *ocelot, int grp, struct sk_buff **nskb)
{
        u64 timestamp, src_port, len;
        u32 xfh[OCELOT_TAG_LEN / 4];
        struct net_device *dev;
        struct sk_buff *skb;
        int sz, buf_len;
        u32 val, *buf;
        int err;

        err = ocelot_xtr_poll_xfh(ocelot, grp, xfh);
        if (err)
                return err;

        ocelot_xfh_get_src_port(xfh, &src_port);
        ocelot_xfh_get_len(xfh, &len);
        ocelot_xfh_get_rew_val(xfh, &timestamp);

        if (WARN_ON(src_port >= ocelot->num_phys_ports))
                return -EINVAL;

        dev = ocelot->ops->port_to_netdev(ocelot, src_port);
        if (!dev)
                return -EINVAL;

        skb = netdev_alloc_skb(dev, len);
        if (unlikely(!skb)) {
                netdev_err(dev, "Unable to allocate sk_buff\n");
                return -ENOMEM;
        }

        buf_len = len - ETH_FCS_LEN;
        buf = (u32 *)skb_put(skb, buf_len);

        len = 0;
        do {
                sz = ocelot_rx_frame_word(ocelot, grp, false, &val);
                if (sz < 0) {
                        err = sz;
                        goto out_free_skb;
                }
                *buf++ = val;
                len += sz;
        } while (len < buf_len);

        /* Read the FCS */
        sz = ocelot_rx_frame_word(ocelot, grp, false, &val);
        if (sz < 0) {
                err = sz;
                goto out_free_skb;
        }

        /* Update the statistics if part of the FCS was read before */
        len -= ETH_FCS_LEN - sz;

        if (unlikely(dev->features & NETIF_F_RXFCS)) {
                buf = (u32 *)skb_put(skb, ETH_FCS_LEN);
                *buf = val;
        }

        if (ocelot->ptp)
                ocelot_ptp_rx_timestamp(ocelot, skb, timestamp);

        /* Everything we see on an interface that is in the HW bridge
         * has already been forwarded.
         */
        if (ocelot->ports[src_port]->bridge)
                skb->offload_fwd_mark = 1;

        skb->protocol = eth_type_trans(skb, dev);

        *nskb = skb;

        return 0;

out_free_skb:
        kfree_skb(skb);
        return err;
}
EXPORT_SYMBOL(ocelot_xtr_poll_frame);

bool ocelot_can_inject(struct ocelot *ocelot, int grp)
{
        u32 val = ocelot_read(ocelot, QS_INJ_STATUS);

        if (!(val & QS_INJ_STATUS_FIFO_RDY(BIT(grp))))
                return false;
        if (val & QS_INJ_STATUS_WMARK_REACHED(BIT(grp)))
                return false;

        return true;
}
EXPORT_SYMBOL(ocelot_can_inject);

void ocelot_ifh_port_set(void *ifh, int port, u32 rew_op, u32 vlan_tag)
{
        ocelot_ifh_set_bypass(ifh, 1);
        ocelot_ifh_set_dest(ifh, BIT_ULL(port));
        ocelot_ifh_set_tag_type(ifh, IFH_TAG_TYPE_C);
        if (vlan_tag)
                ocelot_ifh_set_vlan_tci(ifh, vlan_tag);
        if (rew_op)
                ocelot_ifh_set_rew_op(ifh, rew_op);
}
EXPORT_SYMBOL(ocelot_ifh_port_set);

void ocelot_port_inject_frame(struct ocelot *ocelot, int port, int grp,
                              u32 rew_op, struct sk_buff *skb)
{
        u32 ifh[OCELOT_TAG_LEN / 4] = {0};
        unsigned int i, count, last;

        ocelot_write_rix(ocelot, QS_INJ_CTRL_GAP_SIZE(1) |
                         QS_INJ_CTRL_SOF, QS_INJ_CTRL, grp);

        ocelot_ifh_port_set(ifh, port, rew_op, skb_vlan_tag_get(skb));

        for (i = 0; i < OCELOT_TAG_LEN / 4; i++)
                ocelot_write_rix(ocelot, ifh[i], QS_INJ_WR, grp);

        count = DIV_ROUND_UP(skb->len, 4);
        last = skb->len % 4;
        for (i = 0; i < count; i++)
                ocelot_write_rix(ocelot, ((u32 *)skb->data)[i], QS_INJ_WR, grp);

        /* Add padding */
        while (i < (OCELOT_BUFFER_CELL_SZ / 4)) {
                ocelot_write_rix(ocelot, 0, QS_INJ_WR, grp);
                i++;
        }

        /* Indicate EOF and valid bytes in last word */
        ocelot_write_rix(ocelot, QS_INJ_CTRL_GAP_SIZE(1) |
                         QS_INJ_CTRL_VLD_BYTES(skb->len < OCELOT_BUFFER_CELL_SZ ? 0 : last) |
                         QS_INJ_CTRL_EOF,
                         QS_INJ_CTRL, grp);

        /* Add dummy CRC */
        ocelot_write_rix(ocelot, 0, QS_INJ_WR, grp);
        skb_tx_timestamp(skb);

        skb->dev->stats.tx_packets++;
        skb->dev->stats.tx_bytes += skb->len;
}
EXPORT_SYMBOL(ocelot_port_inject_frame);

void ocelot_drain_cpu_queue(struct ocelot *ocelot, int grp)
{
        while (ocelot_read(ocelot, QS_XTR_DATA_PRESENT) & BIT(grp))
                ocelot_read_rix(ocelot, QS_XTR_RD, grp);
}
EXPORT_SYMBOL(ocelot_drain_cpu_queue);

int ocelot_fdb_add(struct ocelot *ocelot, int port, const unsigned char *addr,
                   u16 vid, const struct net_device *bridge)
{
        int pgid = port;

        if (port == ocelot->npi)
                pgid = PGID_CPU;

        if (!vid)
                vid = ocelot_vlan_unaware_pvid(ocelot, bridge);

        return ocelot_mact_learn(ocelot, pgid, addr, vid, ENTRYTYPE_LOCKED);
}
EXPORT_SYMBOL(ocelot_fdb_add);

int ocelot_fdb_del(struct ocelot *ocelot, int port, const unsigned char *addr,
                   u16 vid, const struct net_device *bridge)
{
        if (!vid)
                vid = ocelot_vlan_unaware_pvid(ocelot, bridge);

        return ocelot_mact_forget(ocelot, addr, vid);
}
EXPORT_SYMBOL(ocelot_fdb_del);

int ocelot_port_fdb_do_dump(const unsigned char *addr, u16 vid,
                            bool is_static, void *data)
{
        struct ocelot_dump_ctx *dump = data;
        u32 portid = NETLINK_CB(dump->cb->skb).portid;
        u32 seq = dump->cb->nlh->nlmsg_seq;
        struct nlmsghdr *nlh;
        struct ndmsg *ndm;

        if (dump->idx < dump->cb->args[2])
                goto skip;

        nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
                        sizeof(*ndm), NLM_F_MULTI);
        if (!nlh)
                return -EMSGSIZE;

        ndm = nlmsg_data(nlh);
        ndm->ndm_family  = AF_BRIDGE;
        ndm->ndm_pad1    = 0;
        ndm->ndm_pad2    = 0;
        ndm->ndm_flags   = NTF_SELF;
        ndm->ndm_type    = 0;
        ndm->ndm_ifindex = dump->dev->ifindex;
        ndm->ndm_state   = is_static ? NUD_NOARP : NUD_REACHABLE;

        if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
                goto nla_put_failure;

        if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
                goto nla_put_failure;

        nlmsg_end(dump->skb, nlh);

skip:
        dump->idx++;
        return 0;

nla_put_failure:
        nlmsg_cancel(dump->skb, nlh);
        return -EMSGSIZE;
}
EXPORT_SYMBOL(ocelot_port_fdb_do_dump);

/* Caller must hold &ocelot->mact_lock */
static int ocelot_mact_read(struct ocelot *ocelot, int port, int row, int col,
                            struct ocelot_mact_entry *entry)
{
        u32 val, dst, macl, mach;
        char mac[ETH_ALEN];

        /* Set row and column to read from */
        ocelot_field_write(ocelot, ANA_TABLES_MACTINDX_M_INDEX, row);
        ocelot_field_write(ocelot, ANA_TABLES_MACTINDX_BUCKET, col);

        /* Issue a read command */
        ocelot_write(ocelot,
                     ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_READ),
                     ANA_TABLES_MACACCESS);

        if (ocelot_mact_wait_for_completion(ocelot))
                return -ETIMEDOUT;

        /* Read the entry flags */
        val = ocelot_read(ocelot, ANA_TABLES_MACACCESS);
        if (!(val & ANA_TABLES_MACACCESS_VALID))
                return -EINVAL;

        /* If the entry read has another port configured as its destination,
         * do not report it.
         */
        dst = (val & ANA_TABLES_MACACCESS_DEST_IDX_M) >> 3;
        if (dst != port)
                return -EINVAL;

        /* Get the entry's MAC address and VLAN id */
        macl = ocelot_read(ocelot, ANA_TABLES_MACLDATA);
        mach = ocelot_read(ocelot, ANA_TABLES_MACHDATA);

        mac[0] = (mach >> 8)  & 0xff;
        mac[1] = (mach >> 0)  & 0xff;
        mac[2] = (macl >> 24) & 0xff;
        mac[3] = (macl >> 16) & 0xff;
        mac[4] = (macl >> 8)  & 0xff;
        mac[5] = (macl >> 0)  & 0xff;

        entry->vid = (mach >> 16) & 0xfff;
        ether_addr_copy(entry->mac, mac);

        return 0;
}

int ocelot_mact_flush(struct ocelot *ocelot, int port)
{
        int err;

        mutex_lock(&ocelot->mact_lock);

        /* Program ageing filter for a single port */
        ocelot_write(ocelot, ANA_ANAGEFIL_PID_EN | ANA_ANAGEFIL_PID_VAL(port),
                     ANA_ANAGEFIL);

        /* Flushing dynamic FDB entries requires two successive age scans */
        ocelot_write(ocelot,
                     ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_AGE),
                     ANA_TABLES_MACACCESS);

        err = ocelot_mact_wait_for_completion(ocelot);
        if (err) {
                mutex_unlock(&ocelot->mact_lock);
                return err;
        }

        /* And second... */
        ocelot_write(ocelot,
                     ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_AGE),
                     ANA_TABLES_MACACCESS);

        err = ocelot_mact_wait_for_completion(ocelot);

        /* Restore ageing filter */
        ocelot_write(ocelot, 0, ANA_ANAGEFIL);

        mutex_unlock(&ocelot->mact_lock);

        return err;
}
EXPORT_SYMBOL_GPL(ocelot_mact_flush);

int ocelot_fdb_dump(struct ocelot *ocelot, int port,
                    dsa_fdb_dump_cb_t *cb, void *data)
{
        int err = 0;
        int i, j;

        /* We could take the lock just around ocelot_mact_read, but doing so
         * thousands of times in a row seems rather pointless and inefficient.
         */
        mutex_lock(&ocelot->mact_lock);

        /* Loop through all the mac tables entries. */
        for (i = 0; i < ocelot->num_mact_rows; i++) {
                for (j = 0; j < 4; j++) {
                        struct ocelot_mact_entry entry;
                        bool is_static;

                        err = ocelot_mact_read(ocelot, port, i, j, &entry);
                        /* If the entry is invalid (wrong port, invalid...),
                         * skip it.
                         */
                        if (err == -EINVAL)
                                continue;
                        else if (err)
                                break;

                        is_static = (entry.type == ENTRYTYPE_LOCKED);

                        /* Hide the reserved VLANs used for
                         * VLAN-unaware bridging.
                         */
                        if (entry.vid > OCELOT_RSV_VLAN_RANGE_START)
                                entry.vid = 0;

                        err = cb(entry.mac, entry.vid, is_static, data);
                        if (err)
                                break;
                }
        }

        mutex_unlock(&ocelot->mact_lock);

        return err;
}
EXPORT_SYMBOL(ocelot_fdb_dump);

static void ocelot_populate_l2_ptp_trap_key(struct ocelot_vcap_filter *trap)
{
        trap->key_type = OCELOT_VCAP_KEY_ETYPE;
        *(__be16 *)trap->key.etype.etype.value = htons(ETH_P_1588);
        *(__be16 *)trap->key.etype.etype.mask = htons(0xffff);
}

static void
ocelot_populate_ipv4_ptp_event_trap_key(struct ocelot_vcap_filter *trap)
{
        trap->key_type = OCELOT_VCAP_KEY_IPV4;
        trap->key.ipv4.proto.value[0] = IPPROTO_UDP;
        trap->key.ipv4.proto.mask[0] = 0xff;
        trap->key.ipv4.dport.value = PTP_EV_PORT;
        trap->key.ipv4.dport.mask = 0xffff;
}

static void
ocelot_populate_ipv6_ptp_event_trap_key(struct ocelot_vcap_filter *trap)
{
        trap->key_type = OCELOT_VCAP_KEY_IPV6;
        trap->key.ipv4.proto.value[0] = IPPROTO_UDP;
        trap->key.ipv4.proto.mask[0] = 0xff;
        trap->key.ipv6.dport.value = PTP_EV_PORT;
        trap->key.ipv6.dport.mask = 0xffff;
}

static void
ocelot_populate_ipv4_ptp_general_trap_key(struct ocelot_vcap_filter *trap)
{
        trap->key_type = OCELOT_VCAP_KEY_IPV4;
        trap->key.ipv4.proto.value[0] = IPPROTO_UDP;
        trap->key.ipv4.proto.mask[0] = 0xff;
        trap->key.ipv4.dport.value = PTP_GEN_PORT;
        trap->key.ipv4.dport.mask = 0xffff;
}

static void
ocelot_populate_ipv6_ptp_general_trap_key(struct ocelot_vcap_filter *trap)
{
        trap->key_type = OCELOT_VCAP_KEY_IPV6;
        trap->key.ipv4.proto.value[0] = IPPROTO_UDP;
        trap->key.ipv4.proto.mask[0] = 0xff;
        trap->key.ipv6.dport.value = PTP_GEN_PORT;
        trap->key.ipv6.dport.mask = 0xffff;
}

int ocelot_trap_add(struct ocelot *ocelot, int port,
                    unsigned long cookie, bool take_ts,
                    void (*populate)(struct ocelot_vcap_filter *f))
{
        struct ocelot_vcap_block *block_vcap_is2;
        struct ocelot_vcap_filter *trap;
        bool new = false;
        int err;

        block_vcap_is2 = &ocelot->block[VCAP_IS2];

        trap = ocelot_vcap_block_find_filter_by_id(block_vcap_is2, cookie,
                                                   false);
        if (!trap) {
                trap = kzalloc(sizeof(*trap), GFP_KERNEL);
                if (!trap)
                        return -ENOMEM;

                populate(trap);
                trap->prio = 1;
                trap->id.cookie = cookie;
                trap->id.tc_offload = false;
                trap->block_id = VCAP_IS2;
                trap->type = OCELOT_VCAP_FILTER_OFFLOAD;
                trap->lookup = 0;
                trap->action.cpu_copy_ena = true;
                trap->action.mask_mode = OCELOT_MASK_MODE_PERMIT_DENY;
                trap->action.port_mask = 0;
                trap->take_ts = take_ts;
                trap->is_trap = true;
                new = true;
        }

        trap->ingress_port_mask |= BIT(port);

        if (new)
                err = ocelot_vcap_filter_add(ocelot, trap, NULL);
        else
                err = ocelot_vcap_filter_replace(ocelot, trap);
        if (err) {
                trap->ingress_port_mask &= ~BIT(port);
                if (!trap->ingress_port_mask)
                        kfree(trap);
                return err;
        }

        return 0;
}

int ocelot_trap_del(struct ocelot *ocelot, int port, unsigned long cookie)
{
        struct ocelot_vcap_block *block_vcap_is2;
        struct ocelot_vcap_filter *trap;

        block_vcap_is2 = &ocelot->block[VCAP_IS2];

        trap = ocelot_vcap_block_find_filter_by_id(block_vcap_is2, cookie,
                                                   false);
        if (!trap)
                return 0;

        trap->ingress_port_mask &= ~BIT(port);
        if (!trap->ingress_port_mask)
                return ocelot_vcap_filter_del(ocelot, trap);

        return ocelot_vcap_filter_replace(ocelot, trap);
}

static int ocelot_l2_ptp_trap_add(struct ocelot *ocelot, int port)
{
        unsigned long l2_cookie = OCELOT_VCAP_IS2_L2_PTP_TRAP(ocelot);

        return ocelot_trap_add(ocelot, port, l2_cookie, true,
                               ocelot_populate_l2_ptp_trap_key);
}

static int ocelot_l2_ptp_trap_del(struct ocelot *ocelot, int port)
{
        unsigned long l2_cookie = OCELOT_VCAP_IS2_L2_PTP_TRAP(ocelot);

        return ocelot_trap_del(ocelot, port, l2_cookie);
}

static int ocelot_ipv4_ptp_trap_add(struct ocelot *ocelot, int port)
{
        unsigned long ipv4_gen_cookie = OCELOT_VCAP_IS2_IPV4_GEN_PTP_TRAP(ocelot);
        unsigned long ipv4_ev_cookie = OCELOT_VCAP_IS2_IPV4_EV_PTP_TRAP(ocelot);
        int err;

        err = ocelot_trap_add(ocelot, port, ipv4_ev_cookie, true,
                              ocelot_populate_ipv4_ptp_event_trap_key);
        if (err)
                return err;

        err = ocelot_trap_add(ocelot, port, ipv4_gen_cookie, false,
                              ocelot_populate_ipv4_ptp_general_trap_key);
        if (err)
                ocelot_trap_del(ocelot, port, ipv4_ev_cookie);

        return err;
}

static int ocelot_ipv4_ptp_trap_del(struct ocelot *ocelot, int port)
{
        unsigned long ipv4_gen_cookie = OCELOT_VCAP_IS2_IPV4_GEN_PTP_TRAP(ocelot);
        unsigned long ipv4_ev_cookie = OCELOT_VCAP_IS2_IPV4_EV_PTP_TRAP(ocelot);
        int err;

        err = ocelot_trap_del(ocelot, port, ipv4_ev_cookie);
        err |= ocelot_trap_del(ocelot, port, ipv4_gen_cookie);
        return err;
}

static int ocelot_ipv6_ptp_trap_add(struct ocelot *ocelot, int port)
{
        unsigned long ipv6_gen_cookie = OCELOT_VCAP_IS2_IPV6_GEN_PTP_TRAP(ocelot);
        unsigned long ipv6_ev_cookie = OCELOT_VCAP_IS2_IPV6_EV_PTP_TRAP(ocelot);
        int err;

        err = ocelot_trap_add(ocelot, port, ipv6_ev_cookie, true,
                              ocelot_populate_ipv6_ptp_event_trap_key);
        if (err)
                return err;

        err = ocelot_trap_add(ocelot, port, ipv6_gen_cookie, false,
                              ocelot_populate_ipv6_ptp_general_trap_key);
        if (err)
                ocelot_trap_del(ocelot, port, ipv6_ev_cookie);

        return err;
}

static int ocelot_ipv6_ptp_trap_del(struct ocelot *ocelot, int port)
{
        unsigned long ipv6_gen_cookie = OCELOT_VCAP_IS2_IPV6_GEN_PTP_TRAP(ocelot);
        unsigned long ipv6_ev_cookie = OCELOT_VCAP_IS2_IPV6_EV_PTP_TRAP(ocelot);
        int err;

        err = ocelot_trap_del(ocelot, port, ipv6_ev_cookie);
        err |= ocelot_trap_del(ocelot, port, ipv6_gen_cookie);
        return err;
}

static int ocelot_setup_ptp_traps(struct ocelot *ocelot, int port,
                                  bool l2, bool l4)
{
        int err;

        if (l2)
                err = ocelot_l2_ptp_trap_add(ocelot, port);
        else
                err = ocelot_l2_ptp_trap_del(ocelot, port);
        if (err)
                return err;

        if (l4) {
                err = ocelot_ipv4_ptp_trap_add(ocelot, port);
                if (err)
                        goto err_ipv4;

                err = ocelot_ipv6_ptp_trap_add(ocelot, port);
                if (err)
                        goto err_ipv6;
        } else {
                err = ocelot_ipv4_ptp_trap_del(ocelot, port);

                err |= ocelot_ipv6_ptp_trap_del(ocelot, port);
        }
        if (err)
                return err;

        return 0;

err_ipv6:
        ocelot_ipv4_ptp_trap_del(ocelot, port);
err_ipv4:
        if (l2)
                ocelot_l2_ptp_trap_del(ocelot, port);
        return err;
}

int ocelot_hwstamp_get(struct ocelot *ocelot, int port, struct ifreq *ifr)
{
        return copy_to_user(ifr->ifr_data, &ocelot->hwtstamp_config,
                            sizeof(ocelot->hwtstamp_config)) ? -EFAULT : 0;
}
EXPORT_SYMBOL(ocelot_hwstamp_get);

int ocelot_hwstamp_set(struct ocelot *ocelot, int port, struct ifreq *ifr)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        bool l2 = false, l4 = false;
        struct hwtstamp_config cfg;
        int err;

        if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
                return -EFAULT;

        /* Tx type sanity check */
        switch (cfg.tx_type) {
        case HWTSTAMP_TX_ON:
                ocelot_port->ptp_cmd = IFH_REW_OP_TWO_STEP_PTP;
                break;
        case HWTSTAMP_TX_ONESTEP_SYNC:
                /* IFH_REW_OP_ONE_STEP_PTP updates the correctional field, we
                 * need to update the origin time.
                 */
                ocelot_port->ptp_cmd = IFH_REW_OP_ORIGIN_PTP;
                break;
        case HWTSTAMP_TX_OFF:
                ocelot_port->ptp_cmd = 0;
                break;
        default:
                return -ERANGE;
        }

        mutex_lock(&ocelot->ptp_lock);

        switch (cfg.rx_filter) {
        case HWTSTAMP_FILTER_NONE:
                break;
        case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
        case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
        case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
                l4 = true;
                break;
        case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
        case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
        case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
                l2 = true;
                break;
        case HWTSTAMP_FILTER_PTP_V2_EVENT:
        case HWTSTAMP_FILTER_PTP_V2_SYNC:
        case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
                l2 = true;
                l4 = true;
                break;
        default:
                mutex_unlock(&ocelot->ptp_lock);
                return -ERANGE;
        }

        err = ocelot_setup_ptp_traps(ocelot, port, l2, l4);
        if (err) {
                mutex_unlock(&ocelot->ptp_lock);
                return err;
        }

        if (l2 && l4)
                cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
        else if (l2)
                cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
        else if (l4)
                cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
        else
                cfg.rx_filter = HWTSTAMP_FILTER_NONE;

        /* Commit back the result & save it */
        memcpy(&ocelot->hwtstamp_config, &cfg, sizeof(cfg));
        mutex_unlock(&ocelot->ptp_lock);

        return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
}
EXPORT_SYMBOL(ocelot_hwstamp_set);

void ocelot_get_strings(struct ocelot *ocelot, int port, u32 sset, u8 *data)
{
        int i;

        if (sset != ETH_SS_STATS)
                return;

        for (i = 0; i < ocelot->num_stats; i++)
                memcpy(data + i * ETH_GSTRING_LEN, ocelot->stats_layout[i].name,
                       ETH_GSTRING_LEN);
}
EXPORT_SYMBOL(ocelot_get_strings);

/* Caller must hold &ocelot->stats_lock */
static int ocelot_port_update_stats(struct ocelot *ocelot, int port)
{
        unsigned int idx = port * ocelot->num_stats;
        struct ocelot_stats_region *region;
        int err, j;

        /* Configure the port to read the stats from */
        ocelot_write(ocelot, SYS_STAT_CFG_STAT_VIEW(port), SYS_STAT_CFG);

        list_for_each_entry(region, &ocelot->stats_regions, node) {
                err = ocelot_bulk_read_rix(ocelot, SYS_COUNT_RX_OCTETS,
                                           region->offset, region->buf,
                                           region->count);
                if (err)
                        return err;

                for (j = 0; j < region->count; j++) {
                        u64 *stat = &ocelot->stats[idx + j];
                        u64 val = region->buf[j];

                        if (val < (*stat & U32_MAX))
                                *stat += (u64)1 << 32;

                        *stat = (*stat & ~(u64)U32_MAX) + val;
                }

                idx += region->count;
        }

        return err;
}

static void ocelot_check_stats_work(struct work_struct *work)
{
        struct delayed_work *del_work = to_delayed_work(work);
        struct ocelot *ocelot = container_of(del_work, struct ocelot,
                                             stats_work);
        int i, err;

        mutex_lock(&ocelot->stats_lock);
        for (i = 0; i < ocelot->num_phys_ports; i++) {
                err = ocelot_port_update_stats(ocelot, i);
                if (err)
                        break;
        }
        mutex_unlock(&ocelot->stats_lock);

        if (err)
                dev_err(ocelot->dev, "Error %d updating ethtool stats\n",  err);

        queue_delayed_work(ocelot->stats_queue, &ocelot->stats_work,
                           OCELOT_STATS_CHECK_DELAY);
}

void ocelot_get_ethtool_stats(struct ocelot *ocelot, int port, u64 *data)
{
        int i, err;

        mutex_lock(&ocelot->stats_lock);

        /* check and update now */
        err = ocelot_port_update_stats(ocelot, port);

        /* Copy all counters */
        for (i = 0; i < ocelot->num_stats; i++)
                *data++ = ocelot->stats[port * ocelot->num_stats + i];

        mutex_unlock(&ocelot->stats_lock);

        if (err)
                dev_err(ocelot->dev, "Error %d updating ethtool stats\n", err);
}
EXPORT_SYMBOL(ocelot_get_ethtool_stats);

int ocelot_get_sset_count(struct ocelot *ocelot, int port, int sset)
{
        if (sset != ETH_SS_STATS)
                return -EOPNOTSUPP;

        return ocelot->num_stats;
}
EXPORT_SYMBOL(ocelot_get_sset_count);

static int ocelot_prepare_stats_regions(struct ocelot *ocelot)
{
        struct ocelot_stats_region *region = NULL;
        unsigned int last;
        int i;

        INIT_LIST_HEAD(&ocelot->stats_regions);

        for (i = 0; i < ocelot->num_stats; i++) {
                if (region && ocelot->stats_layout[i].offset == last + 1) {
                        region->count++;
                } else {
                        region = devm_kzalloc(ocelot->dev, sizeof(*region),
                                              GFP_KERNEL);
                        if (!region)
                                return -ENOMEM;

                        region->offset = ocelot->stats_layout[i].offset;
                        region->count = 1;
                        list_add_tail(&region->node, &ocelot->stats_regions);
                }

                last = ocelot->stats_layout[i].offset;
        }

        list_for_each_entry(region, &ocelot->stats_regions, node) {
                region->buf = devm_kcalloc(ocelot->dev, region->count,
                                           sizeof(*region->buf), GFP_KERNEL);
                if (!region->buf)
                        return -ENOMEM;
        }

        return 0;
}

int ocelot_get_ts_info(struct ocelot *ocelot, int port,
                       struct ethtool_ts_info *info)
{
        info->phc_index = ocelot->ptp_clock ?
                          ptp_clock_index(ocelot->ptp_clock) : -1;
        if (info->phc_index == -1) {
                info->so_timestamping |= SOF_TIMESTAMPING_TX_SOFTWARE |
                                         SOF_TIMESTAMPING_RX_SOFTWARE |

                                         SOF_TIMESTAMPING_SOFTWARE;
                return 0;
        }
        info->so_timestamping |= SOF_TIMESTAMPING_TX_SOFTWARE |
                                 SOF_TIMESTAMPING_RX_SOFTWARE |
                                 SOF_TIMESTAMPING_SOFTWARE |
                                 SOF_TIMESTAMPING_TX_HARDWARE |
                                 SOF_TIMESTAMPING_RX_HARDWARE |
                                 SOF_TIMESTAMPING_RAW_HARDWARE;
        info->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ON) |
                         BIT(HWTSTAMP_TX_ONESTEP_SYNC);
        info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
                           BIT(HWTSTAMP_FILTER_PTP_V2_EVENT) |
                           BIT(HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
                           BIT(HWTSTAMP_FILTER_PTP_V2_L4_EVENT);

        return 0;
}
EXPORT_SYMBOL(ocelot_get_ts_info);

static u32 ocelot_get_bond_mask(struct ocelot *ocelot, struct net_device *bond)
{
        u32 mask = 0;
        int port;

        lockdep_assert_held(&ocelot->fwd_domain_lock);

        for (port = 0; port < ocelot->num_phys_ports; port++) {
                struct ocelot_port *ocelot_port = ocelot->ports[port];

                if (!ocelot_port)
                        continue;

                if (ocelot_port->bond == bond)
                        mask |= BIT(port);
        }

        return mask;
}

/* The logical port number of a LAG is equal to the lowest numbered physical
 * port ID present in that LAG. It may change if that port ever leaves the LAG.
 */
static int ocelot_bond_get_id(struct ocelot *ocelot, struct net_device *bond)
{
        int bond_mask = ocelot_get_bond_mask(ocelot, bond);

        if (!bond_mask)
                return -ENOENT;

        return __ffs(bond_mask);
}

u32 ocelot_get_bridge_fwd_mask(struct ocelot *ocelot, int src_port)
{
        struct ocelot_port *ocelot_port = ocelot->ports[src_port];
        const struct net_device *bridge;
        u32 mask = 0;
        int port;

        if (!ocelot_port || ocelot_port->stp_state != BR_STATE_FORWARDING)
                return 0;

        bridge = ocelot_port->bridge;
        if (!bridge)
                return 0;

        for (port = 0; port < ocelot->num_phys_ports; port++) {
                ocelot_port = ocelot->ports[port];

                if (!ocelot_port)
                        continue;

                if (ocelot_port->stp_state == BR_STATE_FORWARDING &&
                    ocelot_port->bridge == bridge)
                        mask |= BIT(port);
        }

        return mask;
}
EXPORT_SYMBOL_GPL(ocelot_get_bridge_fwd_mask);

u32 ocelot_get_dsa_8021q_cpu_mask(struct ocelot *ocelot)
{
        u32 mask = 0;
        int port;

        for (port = 0; port < ocelot->num_phys_ports; port++) {
                struct ocelot_port *ocelot_port = ocelot->ports[port];

                if (!ocelot_port)
                        continue;

                if (ocelot_port->is_dsa_8021q_cpu)
                        mask |= BIT(port);
        }

        return mask;
}
EXPORT_SYMBOL_GPL(ocelot_get_dsa_8021q_cpu_mask);

void ocelot_apply_bridge_fwd_mask(struct ocelot *ocelot, bool joining)
{
        unsigned long cpu_fwd_mask;
        int port;

        lockdep_assert_held(&ocelot->fwd_domain_lock);

        /* If cut-through forwarding is supported, update the masks before a
         * port joins the forwarding domain, to avoid potential underruns if it
         * has the highest speed from the new domain.
         */
        if (joining && ocelot->ops->cut_through_fwd)
                ocelot->ops->cut_through_fwd(ocelot);

        /* If a DSA tag_8021q CPU exists, it needs to be included in the
         * regular forwarding path of the front ports regardless of whether
         * those are bridged or standalone.
         * If DSA tag_8021q is not used, this returns 0, which is fine because
         * the hardware-based CPU port module can be a destination for packets
         * even if it isn't part of PGID_SRC.
         */
        cpu_fwd_mask = ocelot_get_dsa_8021q_cpu_mask(ocelot);

        /* Apply FWD mask. The loop is needed to add/remove the current port as
         * a source for the other ports.
         */
        for (port = 0; port < ocelot->num_phys_ports; port++) {
                struct ocelot_port *ocelot_port = ocelot->ports[port];
                unsigned long mask;

                if (!ocelot_port) {
                        /* Unused ports can't send anywhere */
                        mask = 0;
                } else if (ocelot_port->is_dsa_8021q_cpu) {
                        /* The DSA tag_8021q CPU ports need to be able to
                         * forward packets to all other ports except for
                         * themselves
                         */
                        mask = GENMASK(ocelot->num_phys_ports - 1, 0);
                        mask &= ~cpu_fwd_mask;
                } else if (ocelot_port->bridge) {
                        struct net_device *bond = ocelot_port->bond;

                        mask = ocelot_get_bridge_fwd_mask(ocelot, port);
                        mask |= cpu_fwd_mask;
                        mask &= ~BIT(port);
                        if (bond)
                                mask &= ~ocelot_get_bond_mask(ocelot, bond);
                } else {
                        /* Standalone ports forward only to DSA tag_8021q CPU
                         * ports (if those exist), or to the hardware CPU port
                         * module otherwise.
                         */
                        mask = cpu_fwd_mask;
                }

                ocelot_write_rix(ocelot, mask, ANA_PGID_PGID, PGID_SRC + port);
        }

        /* If cut-through forwarding is supported and a port is leaving, there
         * is a chance that cut-through was disabled on the other ports due to
         * the port which is leaving (it has a higher link speed). We need to
         * update the cut-through masks of the remaining ports no earlier than
         * after the port has left, to prevent underruns from happening between
         * the cut-through update and the forwarding domain update.
         */
        if (!joining && ocelot->ops->cut_through_fwd)
                ocelot->ops->cut_through_fwd(ocelot);
}
EXPORT_SYMBOL(ocelot_apply_bridge_fwd_mask);

void ocelot_port_set_dsa_8021q_cpu(struct ocelot *ocelot, int port)
{
        u16 vid;

        ocelot->ports[port]->is_dsa_8021q_cpu = true;

        for (vid = OCELOT_RSV_VLAN_RANGE_START; vid < VLAN_N_VID; vid++)
                ocelot_vlan_member_add(ocelot, port, vid, true);
}
EXPORT_SYMBOL_GPL(ocelot_port_set_dsa_8021q_cpu);

void ocelot_port_unset_dsa_8021q_cpu(struct ocelot *ocelot, int port)
{
        u16 vid;

        ocelot->ports[port]->is_dsa_8021q_cpu = false;

        for (vid = OCELOT_RSV_VLAN_RANGE_START; vid < VLAN_N_VID; vid++)
                ocelot_vlan_member_del(ocelot, port, vid);
}
EXPORT_SYMBOL_GPL(ocelot_port_unset_dsa_8021q_cpu);

void ocelot_bridge_stp_state_set(struct ocelot *ocelot, int port, u8 state)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        u32 learn_ena = 0;

        mutex_lock(&ocelot->fwd_domain_lock);

        ocelot_port->stp_state = state;

        if ((state == BR_STATE_LEARNING || state == BR_STATE_FORWARDING) &&
            ocelot_port->learn_ena)
                learn_ena = ANA_PORT_PORT_CFG_LEARN_ENA;

        ocelot_rmw_gix(ocelot, learn_ena, ANA_PORT_PORT_CFG_LEARN_ENA,
                       ANA_PORT_PORT_CFG, port);

        ocelot_apply_bridge_fwd_mask(ocelot, state == BR_STATE_FORWARDING);

        mutex_unlock(&ocelot->fwd_domain_lock);
}
EXPORT_SYMBOL(ocelot_bridge_stp_state_set);

void ocelot_set_ageing_time(struct ocelot *ocelot, unsigned int msecs)
{
        unsigned int age_period = ANA_AUTOAGE_AGE_PERIOD(msecs / 2000);

        /* Setting AGE_PERIOD to zero effectively disables automatic aging,
         * which is clearly not what our intention is. So avoid that.
         */
        if (!age_period)
                age_period = 1;

        ocelot_rmw(ocelot, age_period, ANA_AUTOAGE_AGE_PERIOD_M, ANA_AUTOAGE);
}
EXPORT_SYMBOL(ocelot_set_ageing_time);

static struct ocelot_multicast *ocelot_multicast_get(struct ocelot *ocelot,
                                                     const unsigned char *addr,
                                                     u16 vid)
{
        struct ocelot_multicast *mc;

        list_for_each_entry(mc, &ocelot->multicast, list) {
                if (ether_addr_equal(mc->addr, addr) && mc->vid == vid)
                        return mc;
        }

        return NULL;
}

static enum macaccess_entry_type ocelot_classify_mdb(const unsigned char *addr)
{
        if (addr[0] == 0x01 && addr[1] == 0x00 && addr[2] == 0x5e)
                return ENTRYTYPE_MACv4;
        if (addr[0] == 0x33 && addr[1] == 0x33)
                return ENTRYTYPE_MACv6;
        return ENTRYTYPE_LOCKED;
}

static struct ocelot_pgid *ocelot_pgid_alloc(struct ocelot *ocelot, int index,
                                             unsigned long ports)
{
        struct ocelot_pgid *pgid;

        pgid = kzalloc(sizeof(*pgid), GFP_KERNEL);
        if (!pgid)
                return ERR_PTR(-ENOMEM);

        pgid->ports = ports;
        pgid->index = index;
        refcount_set(&pgid->refcount, 1);
        list_add_tail(&pgid->list, &ocelot->pgids);

        return pgid;
}

static void ocelot_pgid_free(struct ocelot *ocelot, struct ocelot_pgid *pgid)
{
        if (!refcount_dec_and_test(&pgid->refcount))
                return;

        list_del(&pgid->list);
        kfree(pgid);
}

static struct ocelot_pgid *ocelot_mdb_get_pgid(struct ocelot *ocelot,
                                               const struct ocelot_multicast *mc)
{
        struct ocelot_pgid *pgid;
        int index;

        /* According to VSC7514 datasheet 3.9.1.5 IPv4 Multicast Entries and
         * 3.9.1.6 IPv6 Multicast Entries, "Instead of a lookup in the
         * destination mask table (PGID), the destination set is programmed as
         * part of the entry MAC address.", and the DEST_IDX is set to 0.
         */
        if (mc->entry_type == ENTRYTYPE_MACv4 ||
            mc->entry_type == ENTRYTYPE_MACv6)
                return ocelot_pgid_alloc(ocelot, 0, mc->ports);

        list_for_each_entry(pgid, &ocelot->pgids, list) {
                /* When searching for a nonreserved multicast PGID, ignore the
                 * dummy PGID of zero that we have for MACv4/MACv6 entries
                 */
                if (pgid->index && pgid->ports == mc->ports) {
                        refcount_inc(&pgid->refcount);
                        return pgid;
                }
        }

        /* Search for a free index in the nonreserved multicast PGID area */
        for_each_nonreserved_multicast_dest_pgid(ocelot, index) {
                bool used = false;

                list_for_each_entry(pgid, &ocelot->pgids, list) {
                        if (pgid->index == index) {
                                used = true;
                                break;
                        }
                }

                if (!used)
                        return ocelot_pgid_alloc(ocelot, index, mc->ports);
        }

        return ERR_PTR(-ENOSPC);
}

static void ocelot_encode_ports_to_mdb(unsigned char *addr,
                                       struct ocelot_multicast *mc)
{
        ether_addr_copy(addr, mc->addr);

        if (mc->entry_type == ENTRYTYPE_MACv4) {
                addr[0] = 0;
                addr[1] = mc->ports >> 8;
                addr[2] = mc->ports & 0xff;
        } else if (mc->entry_type == ENTRYTYPE_MACv6) {
                addr[0] = mc->ports >> 8;
                addr[1] = mc->ports & 0xff;
        }
}

int ocelot_port_mdb_add(struct ocelot *ocelot, int port,
                        const struct switchdev_obj_port_mdb *mdb,
                        const struct net_device *bridge)
{
        unsigned char addr[ETH_ALEN];
        struct ocelot_multicast *mc;
        struct ocelot_pgid *pgid;
        u16 vid = mdb->vid;

        if (port == ocelot->npi)
                port = ocelot->num_phys_ports;

        if (!vid)
                vid = ocelot_vlan_unaware_pvid(ocelot, bridge);

        mc = ocelot_multicast_get(ocelot, mdb->addr, vid);
        if (!mc) {
                /* New entry */
                mc = devm_kzalloc(ocelot->dev, sizeof(*mc), GFP_KERNEL);
                if (!mc)
                        return -ENOMEM;

                mc->entry_type = ocelot_classify_mdb(mdb->addr);
                ether_addr_copy(mc->addr, mdb->addr);
                mc->vid = vid;

                list_add_tail(&mc->list, &ocelot->multicast);
        } else {
                /* Existing entry. Clean up the current port mask from
                 * hardware now, because we'll be modifying it.
                 */
                ocelot_pgid_free(ocelot, mc->pgid);
                ocelot_encode_ports_to_mdb(addr, mc);
                ocelot_mact_forget(ocelot, addr, vid);
        }

        mc->ports |= BIT(port);

        pgid = ocelot_mdb_get_pgid(ocelot, mc);
        if (IS_ERR(pgid)) {
                dev_err(ocelot->dev,
                        "Cannot allocate PGID for mdb %pM vid %d\n",
                        mc->addr, mc->vid);
                devm_kfree(ocelot->dev, mc);
                return PTR_ERR(pgid);
        }
        mc->pgid = pgid;

        ocelot_encode_ports_to_mdb(addr, mc);

        if (mc->entry_type != ENTRYTYPE_MACv4 &&
            mc->entry_type != ENTRYTYPE_MACv6)
                ocelot_write_rix(ocelot, pgid->ports, ANA_PGID_PGID,
                                 pgid->index);

        return ocelot_mact_learn(ocelot, pgid->index, addr, vid,
                                 mc->entry_type);
}
EXPORT_SYMBOL(ocelot_port_mdb_add);

int ocelot_port_mdb_del(struct ocelot *ocelot, int port,
                        const struct switchdev_obj_port_mdb *mdb,
                        const struct net_device *bridge)
{
        unsigned char addr[ETH_ALEN];
        struct ocelot_multicast *mc;
        struct ocelot_pgid *pgid;
        u16 vid = mdb->vid;

        if (port == ocelot->npi)
                port = ocelot->num_phys_ports;

        if (!vid)
                vid = ocelot_vlan_unaware_pvid(ocelot, bridge);

        mc = ocelot_multicast_get(ocelot, mdb->addr, vid);
        if (!mc)
                return -ENOENT;

        ocelot_encode_ports_to_mdb(addr, mc);
        ocelot_mact_forget(ocelot, addr, vid);

        ocelot_pgid_free(ocelot, mc->pgid);
        mc->ports &= ~BIT(port);
        if (!mc->ports) {
                list_del(&mc->list);
                devm_kfree(ocelot->dev, mc);
                return 0;
        }

        /* We have a PGID with fewer ports now */
        pgid = ocelot_mdb_get_pgid(ocelot, mc);
        if (IS_ERR(pgid))
                return PTR_ERR(pgid);
        mc->pgid = pgid;

        ocelot_encode_ports_to_mdb(addr, mc);

        if (mc->entry_type != ENTRYTYPE_MACv4 &&
            mc->entry_type != ENTRYTYPE_MACv6)
                ocelot_write_rix(ocelot, pgid->ports, ANA_PGID_PGID,
                                 pgid->index);

        return ocelot_mact_learn(ocelot, pgid->index, addr, vid,
                                 mc->entry_type);
}
EXPORT_SYMBOL(ocelot_port_mdb_del);

int ocelot_port_bridge_join(struct ocelot *ocelot, int port,
                            struct net_device *bridge, int bridge_num,
                            struct netlink_ext_ack *extack)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        int err;

        err = ocelot_single_vlan_aware_bridge(ocelot, extack);
        if (err)
                return err;

        mutex_lock(&ocelot->fwd_domain_lock);

        ocelot_port->bridge = bridge;
        ocelot_port->bridge_num = bridge_num;

        ocelot_apply_bridge_fwd_mask(ocelot, true);

        mutex_unlock(&ocelot->fwd_domain_lock);

        if (br_vlan_enabled(bridge))
                return 0;

        return ocelot_add_vlan_unaware_pvid(ocelot, port, bridge);
}
EXPORT_SYMBOL(ocelot_port_bridge_join);

void ocelot_port_bridge_leave(struct ocelot *ocelot, int port,
                              struct net_device *bridge)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];

        mutex_lock(&ocelot->fwd_domain_lock);

        if (!br_vlan_enabled(bridge))
                ocelot_del_vlan_unaware_pvid(ocelot, port, bridge);

        ocelot_port->bridge = NULL;
        ocelot_port->bridge_num = -1;

        ocelot_port_set_pvid(ocelot, port, NULL);
        ocelot_port_manage_port_tag(ocelot, port);
        ocelot_apply_bridge_fwd_mask(ocelot, false);

        mutex_unlock(&ocelot->fwd_domain_lock);
}
EXPORT_SYMBOL(ocelot_port_bridge_leave);

static void ocelot_set_aggr_pgids(struct ocelot *ocelot)
{
        unsigned long visited = GENMASK(ocelot->num_phys_ports - 1, 0);
        int i, port, lag;

        /* Reset destination and aggregation PGIDS */
        for_each_unicast_dest_pgid(ocelot, port)
                ocelot_write_rix(ocelot, BIT(port), ANA_PGID_PGID, port);

        for_each_aggr_pgid(ocelot, i)
                ocelot_write_rix(ocelot, GENMASK(ocelot->num_phys_ports - 1, 0),
                                 ANA_PGID_PGID, i);

        /* The visited ports bitmask holds the list of ports offloading any
         * bonding interface. Initially we mark all these ports as unvisited,
         * then every time we visit a port in this bitmask, we know that it is
         * the lowest numbered port, i.e. the one whose logical ID == physical
         * port ID == LAG ID. So we mark as visited all further ports in the
         * bitmask that are offloading the same bonding interface. This way,
         * we set up the aggregation PGIDs only once per bonding interface.
         */
        for (port = 0; port < ocelot->num_phys_ports; port++) {
                struct ocelot_port *ocelot_port = ocelot->ports[port];

                if (!ocelot_port || !ocelot_port->bond)
                        continue;

                visited &= ~BIT(port);
        }

        /* Now, set PGIDs for each active LAG */
        for (lag = 0; lag < ocelot->num_phys_ports; lag++) {
                struct net_device *bond = ocelot->ports[lag]->bond;
                int num_active_ports = 0;
                unsigned long bond_mask;
                u8 aggr_idx[16];

                if (!bond || (visited & BIT(lag)))
                        continue;

                bond_mask = ocelot_get_bond_mask(ocelot, bond);

                for_each_set_bit(port, &bond_mask, ocelot->num_phys_ports) {
                        struct ocelot_port *ocelot_port = ocelot->ports[port];

                        // Destination mask
                        ocelot_write_rix(ocelot, bond_mask,
                                         ANA_PGID_PGID, port);

                        if (ocelot_port->lag_tx_active)
                                aggr_idx[num_active_ports++] = port;
                }

                for_each_aggr_pgid(ocelot, i) {
                        u32 ac;

                        ac = ocelot_read_rix(ocelot, ANA_PGID_PGID, i);
                        ac &= ~bond_mask;
                        /* Don't do division by zero if there was no active
                         * port. Just make all aggregation codes zero.
                         */
                        if (num_active_ports)
                                ac |= BIT(aggr_idx[i % num_active_ports]);
                        ocelot_write_rix(ocelot, ac, ANA_PGID_PGID, i);
                }

                /* Mark all ports in the same LAG as visited to avoid applying
                 * the same config again.
                 */
                for (port = lag; port < ocelot->num_phys_ports; port++) {
                        struct ocelot_port *ocelot_port = ocelot->ports[port];

                        if (!ocelot_port)
                                continue;

                        if (ocelot_port->bond == bond)
                                visited |= BIT(port);
                }
        }
}

/* When offloading a bonding interface, the switch ports configured under the
 * same bond must have the same logical port ID, equal to the physical port ID
 * of the lowest numbered physical port in that bond. Otherwise, in standalone/
 * bridged mode, each port has a logical port ID equal to its physical port ID.
 */
static void ocelot_setup_logical_port_ids(struct ocelot *ocelot)
{
        int port;

        for (port = 0; port < ocelot->num_phys_ports; port++) {
                struct ocelot_port *ocelot_port = ocelot->ports[port];
                struct net_device *bond;

                if (!ocelot_port)
                        continue;

                bond = ocelot_port->bond;
                if (bond) {
                        int lag = ocelot_bond_get_id(ocelot, bond);

                        ocelot_rmw_gix(ocelot,
                                       ANA_PORT_PORT_CFG_PORTID_VAL(lag),
                                       ANA_PORT_PORT_CFG_PORTID_VAL_M,
                                       ANA_PORT_PORT_CFG, port);
                } else {
                        ocelot_rmw_gix(ocelot,
                                       ANA_PORT_PORT_CFG_PORTID_VAL(port),
                                       ANA_PORT_PORT_CFG_PORTID_VAL_M,
                                       ANA_PORT_PORT_CFG, port);
                }
        }
}

/* Documentation for PORTID_VAL says:
 *     Logical port number for front port. If port is not a member of a LLAG,
 *     then PORTID must be set to the physical port number.
 *     If port is a member of a LLAG, then PORTID must be set to the common
 *     PORTID_VAL used for all member ports of the LLAG.
 *     The value must not exceed the number of physical ports on the device.
 *
 * This means we have little choice but to migrate FDB entries pointing towards
 * a logical port when that changes.
 */
static void ocelot_migrate_lag_fdbs(struct ocelot *ocelot,
                                    struct net_device *bond,
                                    int lag)
{
        struct ocelot_lag_fdb *fdb;
        int err;

        lockdep_assert_held(&ocelot->fwd_domain_lock);

        list_for_each_entry(fdb, &ocelot->lag_fdbs, list) {
                if (fdb->bond != bond)
                        continue;

                err = ocelot_mact_forget(ocelot, fdb->addr, fdb->vid);
                if (err) {
                        dev_err(ocelot->dev,
                                "failed to delete LAG %s FDB %pM vid %d: %pe\n",
                                bond->name, fdb->addr, fdb->vid, ERR_PTR(err));
                }

                err = ocelot_mact_learn(ocelot, lag, fdb->addr, fdb->vid,
                                        ENTRYTYPE_LOCKED);
                if (err) {
                        dev_err(ocelot->dev,
                                "failed to migrate LAG %s FDB %pM vid %d: %pe\n",
                                bond->name, fdb->addr, fdb->vid, ERR_PTR(err));
                }
        }
}

int ocelot_port_lag_join(struct ocelot *ocelot, int port,
                         struct net_device *bond,
                         struct netdev_lag_upper_info *info)
{
        if (info->tx_type != NETDEV_LAG_TX_TYPE_HASH)
                return -EOPNOTSUPP;

        mutex_lock(&ocelot->fwd_domain_lock);

        ocelot->ports[port]->bond = bond;

        ocelot_setup_logical_port_ids(ocelot);
        ocelot_apply_bridge_fwd_mask(ocelot, true);
        ocelot_set_aggr_pgids(ocelot);

        mutex_unlock(&ocelot->fwd_domain_lock);

        return 0;
}
EXPORT_SYMBOL(ocelot_port_lag_join);

void ocelot_port_lag_leave(struct ocelot *ocelot, int port,
                           struct net_device *bond)
{
        int old_lag_id, new_lag_id;

        mutex_lock(&ocelot->fwd_domain_lock);

        old_lag_id = ocelot_bond_get_id(ocelot, bond);

        ocelot->ports[port]->bond = NULL;

        ocelot_setup_logical_port_ids(ocelot);
        ocelot_apply_bridge_fwd_mask(ocelot, false);
        ocelot_set_aggr_pgids(ocelot);

        new_lag_id = ocelot_bond_get_id(ocelot, bond);

        if (new_lag_id >= 0 && old_lag_id != new_lag_id)
                ocelot_migrate_lag_fdbs(ocelot, bond, new_lag_id);

        mutex_unlock(&ocelot->fwd_domain_lock);
}
EXPORT_SYMBOL(ocelot_port_lag_leave);

void ocelot_port_lag_change(struct ocelot *ocelot, int port, bool lag_tx_active)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];

        mutex_lock(&ocelot->fwd_domain_lock);

        ocelot_port->lag_tx_active = lag_tx_active;

        /* Rebalance the LAGs */
        ocelot_set_aggr_pgids(ocelot);

        mutex_unlock(&ocelot->fwd_domain_lock);
}
EXPORT_SYMBOL(ocelot_port_lag_change);

int ocelot_lag_fdb_add(struct ocelot *ocelot, struct net_device *bond,
                       const unsigned char *addr, u16 vid,
                       const struct net_device *bridge)
{
        struct ocelot_lag_fdb *fdb;
        int lag, err;

        fdb = kzalloc(sizeof(*fdb), GFP_KERNEL);
        if (!fdb)
                return -ENOMEM;

        mutex_lock(&ocelot->fwd_domain_lock);

        if (!vid)
                vid = ocelot_vlan_unaware_pvid(ocelot, bridge);

        ether_addr_copy(fdb->addr, addr);
        fdb->vid = vid;
        fdb->bond = bond;

        lag = ocelot_bond_get_id(ocelot, bond);

        err = ocelot_mact_learn(ocelot, lag, addr, vid, ENTRYTYPE_LOCKED);
        if (err) {
                mutex_unlock(&ocelot->fwd_domain_lock);
                kfree(fdb);
                return err;
        }

        list_add_tail(&fdb->list, &ocelot->lag_fdbs);
        mutex_unlock(&ocelot->fwd_domain_lock);

        return 0;
}
EXPORT_SYMBOL_GPL(ocelot_lag_fdb_add);

int ocelot_lag_fdb_del(struct ocelot *ocelot, struct net_device *bond,
                       const unsigned char *addr, u16 vid,
                       const struct net_device *bridge)
{
        struct ocelot_lag_fdb *fdb, *tmp;

        mutex_lock(&ocelot->fwd_domain_lock);

        if (!vid)
                vid = ocelot_vlan_unaware_pvid(ocelot, bridge);

        list_for_each_entry_safe(fdb, tmp, &ocelot->lag_fdbs, list) {
                if (!ether_addr_equal(fdb->addr, addr) || fdb->vid != vid ||
                    fdb->bond != bond)
                        continue;

                ocelot_mact_forget(ocelot, addr, vid);
                list_del(&fdb->list);
                mutex_unlock(&ocelot->fwd_domain_lock);
                kfree(fdb);

                return 0;
        }

        mutex_unlock(&ocelot->fwd_domain_lock);

        return -ENOENT;
}
EXPORT_SYMBOL_GPL(ocelot_lag_fdb_del);

/* Configure the maximum SDU (L2 payload) on RX to the value specified in @sdu.
 * The length of VLAN tags is accounted for automatically via DEV_MAC_TAGS_CFG.
 * In the special case that it's the NPI port that we're configuring, the
 * length of the tag and optional prefix needs to be accounted for privately,
 * in order to be able to sustain communication at the requested @sdu.
 */
void ocelot_port_set_maxlen(struct ocelot *ocelot, int port, size_t sdu)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        int maxlen = sdu + ETH_HLEN + ETH_FCS_LEN;
        int pause_start, pause_stop;
        int atop, atop_tot;

        if (port == ocelot->npi) {
                maxlen += OCELOT_TAG_LEN;

                if (ocelot->npi_inj_prefix == OCELOT_TAG_PREFIX_SHORT)
                        maxlen += OCELOT_SHORT_PREFIX_LEN;
                else if (ocelot->npi_inj_prefix == OCELOT_TAG_PREFIX_LONG)
                        maxlen += OCELOT_LONG_PREFIX_LEN;
        }

        ocelot_port_writel(ocelot_port, maxlen, DEV_MAC_MAXLEN_CFG);

        /* Set Pause watermark hysteresis */
        pause_start = 6 * maxlen / OCELOT_BUFFER_CELL_SZ;
        pause_stop = 4 * maxlen / OCELOT_BUFFER_CELL_SZ;
        ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_START,
                            pause_start);
        ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_STOP,
                            pause_stop);

        /* Tail dropping watermarks */
        atop_tot = (ocelot->packet_buffer_size - 9 * maxlen) /
                   OCELOT_BUFFER_CELL_SZ;
        atop = (9 * maxlen) / OCELOT_BUFFER_CELL_SZ;
        ocelot_write_rix(ocelot, ocelot->ops->wm_enc(atop), SYS_ATOP, port);
        ocelot_write(ocelot, ocelot->ops->wm_enc(atop_tot), SYS_ATOP_TOT_CFG);
}
EXPORT_SYMBOL(ocelot_port_set_maxlen);

int ocelot_get_max_mtu(struct ocelot *ocelot, int port)
{
        int max_mtu = 65535 - ETH_HLEN - ETH_FCS_LEN;

        if (port == ocelot->npi) {
                max_mtu -= OCELOT_TAG_LEN;

                if (ocelot->npi_inj_prefix == OCELOT_TAG_PREFIX_SHORT)
                        max_mtu -= OCELOT_SHORT_PREFIX_LEN;
                else if (ocelot->npi_inj_prefix == OCELOT_TAG_PREFIX_LONG)
                        max_mtu -= OCELOT_LONG_PREFIX_LEN;
        }

        return max_mtu;
}
EXPORT_SYMBOL(ocelot_get_max_mtu);

static void ocelot_port_set_learning(struct ocelot *ocelot, int port,
                                     bool enabled)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        u32 val = 0;

        if (enabled)
                val = ANA_PORT_PORT_CFG_LEARN_ENA;

        ocelot_rmw_gix(ocelot, val, ANA_PORT_PORT_CFG_LEARN_ENA,
                       ANA_PORT_PORT_CFG, port);

        ocelot_port->learn_ena = enabled;
}

static void ocelot_port_set_ucast_flood(struct ocelot *ocelot, int port,
                                        bool enabled)
{
        u32 val = 0;

        if (enabled)
                val = BIT(port);

        ocelot_rmw_rix(ocelot, val, BIT(port), ANA_PGID_PGID, PGID_UC);
}

static void ocelot_port_set_mcast_flood(struct ocelot *ocelot, int port,
                                        bool enabled)
{
        u32 val = 0;

        if (enabled)
                val = BIT(port);

        ocelot_rmw_rix(ocelot, val, BIT(port), ANA_PGID_PGID, PGID_MC);
        ocelot_rmw_rix(ocelot, val, BIT(port), ANA_PGID_PGID, PGID_MCIPV4);
        ocelot_rmw_rix(ocelot, val, BIT(port), ANA_PGID_PGID, PGID_MCIPV6);
}

static void ocelot_port_set_bcast_flood(struct ocelot *ocelot, int port,
                                        bool enabled)
{
        u32 val = 0;

        if (enabled)
                val = BIT(port);

        ocelot_rmw_rix(ocelot, val, BIT(port), ANA_PGID_PGID, PGID_BC);
}

int ocelot_port_pre_bridge_flags(struct ocelot *ocelot, int port,
                                 struct switchdev_brport_flags flags)
{
        if (flags.mask & ~(BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
                           BR_BCAST_FLOOD))
                return -EINVAL;

        return 0;
}
EXPORT_SYMBOL(ocelot_port_pre_bridge_flags);

void ocelot_port_bridge_flags(struct ocelot *ocelot, int port,
                              struct switchdev_brport_flags flags)
{
        if (port == ocelot->npi)
                port = ocelot->num_phys_ports;

        if (flags.mask & BR_LEARNING)
                ocelot_port_set_learning(ocelot, port,
                                         !!(flags.val & BR_LEARNING));

        if (flags.mask & BR_FLOOD)
                ocelot_port_set_ucast_flood(ocelot, port,
                                            !!(flags.val & BR_FLOOD));

        if (flags.mask & BR_MCAST_FLOOD)
                ocelot_port_set_mcast_flood(ocelot, port,
                                            !!(flags.val & BR_MCAST_FLOOD));

        if (flags.mask & BR_BCAST_FLOOD)
                ocelot_port_set_bcast_flood(ocelot, port,
                                            !!(flags.val & BR_BCAST_FLOOD));
}
EXPORT_SYMBOL(ocelot_port_bridge_flags);

int ocelot_port_get_default_prio(struct ocelot *ocelot, int port)
{
        int val = ocelot_read_gix(ocelot, ANA_PORT_QOS_CFG, port);

        return ANA_PORT_QOS_CFG_QOS_DEFAULT_VAL_X(val);
}
EXPORT_SYMBOL_GPL(ocelot_port_get_default_prio);

int ocelot_port_set_default_prio(struct ocelot *ocelot, int port, u8 prio)
{
        if (prio >= OCELOT_NUM_TC)
                return -ERANGE;

        ocelot_rmw_gix(ocelot,
                       ANA_PORT_QOS_CFG_QOS_DEFAULT_VAL(prio),
                       ANA_PORT_QOS_CFG_QOS_DEFAULT_VAL_M,
                       ANA_PORT_QOS_CFG,
                       port);

        return 0;
}
EXPORT_SYMBOL_GPL(ocelot_port_set_default_prio);

int ocelot_port_get_dscp_prio(struct ocelot *ocelot, int port, u8 dscp)
{
        int qos_cfg = ocelot_read_gix(ocelot, ANA_PORT_QOS_CFG, port);
        int dscp_cfg = ocelot_read_rix(ocelot, ANA_DSCP_CFG, dscp);

        /* Return error if DSCP prioritization isn't enabled */
        if (!(qos_cfg & ANA_PORT_QOS_CFG_QOS_DSCP_ENA))
                return -EOPNOTSUPP;

        if (qos_cfg & ANA_PORT_QOS_CFG_DSCP_TRANSLATE_ENA) {
                dscp = ANA_DSCP_CFG_DSCP_TRANSLATE_VAL_X(dscp_cfg);
                /* Re-read ANA_DSCP_CFG for the translated DSCP */
                dscp_cfg = ocelot_read_rix(ocelot, ANA_DSCP_CFG, dscp);
        }

        /* If the DSCP value is not trusted, the QoS classification falls back
         * to VLAN PCP or port-based default.
         */
        if (!(dscp_cfg & ANA_DSCP_CFG_DSCP_TRUST_ENA))
                return -EOPNOTSUPP;

        return ANA_DSCP_CFG_QOS_DSCP_VAL_X(dscp_cfg);
}
EXPORT_SYMBOL_GPL(ocelot_port_get_dscp_prio);

int ocelot_port_add_dscp_prio(struct ocelot *ocelot, int port, u8 dscp, u8 prio)
{
        int mask, val;

        if (prio >= OCELOT_NUM_TC)
                return -ERANGE;

        /* There is at least one app table priority (this one), so we need to
         * make sure DSCP prioritization is enabled on the port.
         * Also make sure DSCP translation is disabled
         * (dcbnl doesn't support it).
         */
        mask = ANA_PORT_QOS_CFG_QOS_DSCP_ENA |
               ANA_PORT_QOS_CFG_DSCP_TRANSLATE_ENA;

        ocelot_rmw_gix(ocelot, ANA_PORT_QOS_CFG_QOS_DSCP_ENA, mask,
                       ANA_PORT_QOS_CFG, port);

        /* Trust this DSCP value and map it to the given QoS class */
        val = ANA_DSCP_CFG_DSCP_TRUST_ENA | ANA_DSCP_CFG_QOS_DSCP_VAL(prio);

        ocelot_write_rix(ocelot, val, ANA_DSCP_CFG, dscp);

        return 0;
}
EXPORT_SYMBOL_GPL(ocelot_port_add_dscp_prio);

int ocelot_port_del_dscp_prio(struct ocelot *ocelot, int port, u8 dscp, u8 prio)
{
        int dscp_cfg = ocelot_read_rix(ocelot, ANA_DSCP_CFG, dscp);
        int mask, i;

        /* During a "dcb app replace" command, the new app table entry will be
         * added first, then the old one will be deleted. But the hardware only
         * supports one QoS class per DSCP value (duh), so if we blindly delete
         * the app table entry for this DSCP value, we end up deleting the