// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019, Intel Corporation. */

#include "ice_common.h"
#include "ice_sched.h"
#include "ice_dcb.h"

/**
 * ice_aq_get_lldp_mib
 * @hw: pointer to the HW struct
 * @bridge_type: type of bridge requested
 * @mib_type: Local, Remote or both Local and Remote MIBs
 * @buf: pointer to the caller-supplied buffer to store the MIB block
 * @buf_size: size of the buffer (in bytes)
 * @local_len: length of the returned Local LLDP MIB
 * @remote_len: length of the returned Remote LLDP MIB
 * @cd: pointer to command details structure or NULL
 *
 * Requests the complete LLDP MIB (entire packet). (0x0A00)
 */
static enum ice_status
ice_aq_get_lldp_mib(struct ice_hw *hw, u8 bridge_type, u8 mib_type, void *buf,
                    u16 buf_size, u16 *local_len, u16 *remote_len,
                    struct ice_sq_cd *cd)
{
        struct ice_aqc_lldp_get_mib *cmd;
        struct ice_aq_desc desc;
        enum ice_status status;

        cmd = &desc.params.lldp_get_mib;

        if (buf_size == 0 || !buf)
                return ICE_ERR_PARAM;

        ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_lldp_get_mib);

        cmd->type = mib_type & ICE_AQ_LLDP_MIB_TYPE_M;
        cmd->type |= (bridge_type << ICE_AQ_LLDP_BRID_TYPE_S) &
                ICE_AQ_LLDP_BRID_TYPE_M;

        desc.datalen = cpu_to_le16(buf_size);

        status = ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
        if (!status) {
                if (local_len)
                        *local_len = le16_to_cpu(cmd->local_len);
                if (remote_len)
                        *remote_len = le16_to_cpu(cmd->remote_len);
        }

        return status;
}

/**
 * ice_aq_cfg_lldp_mib_change
 * @hw: pointer to the HW struct
 * @ena_update: Enable or Disable event posting
 * @cd: pointer to command details structure or NULL
 *
 * Enable or Disable posting of an event on ARQ when LLDP MIB
 * associated with the interface changes (0x0A01)
 */
enum ice_status
ice_aq_cfg_lldp_mib_change(struct ice_hw *hw, bool ena_update,
                           struct ice_sq_cd *cd)
{
        struct ice_aqc_lldp_set_mib_change *cmd;
        struct ice_aq_desc desc;

        cmd = &desc.params.lldp_set_event;

        ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_lldp_set_mib_change);

        if (!ena_update)
                cmd->command |= ICE_AQ_LLDP_MIB_UPDATE_DIS;

        return ice_aq_send_cmd(hw, &desc, NULL, 0, cd);
}

/**
 * ice_aq_stop_lldp
 * @hw: pointer to the HW struct
 * @shutdown_lldp_agent: True if LLDP Agent needs to be Shutdown
 *                       False if LLDP Agent needs to be Stopped
 * @persist: True if Stop/Shutdown of LLDP Agent needs to be persistent across
 *           reboots
 * @cd: pointer to command details structure or NULL
 *
 * Stop or Shutdown the embedded LLDP Agent (0x0A05)
 */
enum ice_status
ice_aq_stop_lldp(struct ice_hw *hw, bool shutdown_lldp_agent, bool persist,
                 struct ice_sq_cd *cd)
{
        struct ice_aqc_lldp_stop *cmd;
        struct ice_aq_desc desc;

        cmd = &desc.params.lldp_stop;

        ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_lldp_stop);

        if (shutdown_lldp_agent)
                cmd->command |= ICE_AQ_LLDP_AGENT_SHUTDOWN;

        if (persist)
                cmd->command |= ICE_AQ_LLDP_AGENT_PERSIST_DIS;

        return ice_aq_send_cmd(hw, &desc, NULL, 0, cd);
}

/**
 * ice_aq_start_lldp
 * @hw: pointer to the HW struct
 * @persist: True if Start of LLDP Agent needs to be persistent across reboots
 * @cd: pointer to command details structure or NULL
 *
 * Start the embedded LLDP Agent on all ports. (0x0A06)
 */
enum ice_status
ice_aq_start_lldp(struct ice_hw *hw, bool persist, struct ice_sq_cd *cd)
{
        struct ice_aqc_lldp_start *cmd;
        struct ice_aq_desc desc;

        cmd = &desc.params.lldp_start;

        ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_lldp_start);

        cmd->command = ICE_AQ_LLDP_AGENT_START;

        if (persist)
                cmd->command |= ICE_AQ_LLDP_AGENT_PERSIST_ENA;

        return ice_aq_send_cmd(hw, &desc, NULL, 0, cd);
}

/**
 * ice_aq_set_lldp_mib - Set the LLDP MIB
 * @hw: pointer to the HW struct
 * @mib_type: Local, Remote or both Local and Remote MIBs
 * @buf: pointer to the caller-supplied buffer to store the MIB block
 * @buf_size: size of the buffer (in bytes)
 * @cd: pointer to command details structure or NULL
 *
 * Set the LLDP MIB. (0x0A08)
 */
static enum ice_status
ice_aq_set_lldp_mib(struct ice_hw *hw, u8 mib_type, void *buf, u16 buf_size,
                    struct ice_sq_cd *cd)
{
        struct ice_aqc_lldp_set_local_mib *cmd;
        struct ice_aq_desc desc;

        cmd = &desc.params.lldp_set_mib;

        if (buf_size == 0 || !buf)
                return ICE_ERR_PARAM;

        ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_lldp_set_local_mib);

        desc.flags |= cpu_to_le16((u16)ICE_AQ_FLAG_RD);
        desc.datalen = cpu_to_le16(buf_size);

        cmd->type = mib_type;
        cmd->length = cpu_to_le16(buf_size);

        return ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
}

/**
 * ice_get_dcbx_status
 * @hw: pointer to the HW struct
 *
 * Get the DCBX status from the Firmware
 */
static u8 ice_get_dcbx_status(struct ice_hw *hw)
{
        u32 reg;

        reg = rd32(hw, PRTDCB_GENS);
        return (u8)((reg & PRTDCB_GENS_DCBX_STATUS_M) >>
                    PRTDCB_GENS_DCBX_STATUS_S);
}

/**
 * ice_parse_ieee_ets_common_tlv
 * @buf: Data buffer to be parsed for ETS CFG/REC data
 * @ets_cfg: Container to store parsed data
 *
 * Parses the common data of IEEE 802.1Qaz ETS CFG/REC TLV
 */
static void
ice_parse_ieee_ets_common_tlv(u8 *buf, struct ice_dcb_ets_cfg *ets_cfg)
{
        u8 offset = 0;
        int i;

        /* Priority Assignment Table (4 octets)
         * Octets:|    1    |    2    |    3    |    4    |
         *        -----------------------------------------
         *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
         *        -----------------------------------------
         *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
         *        -----------------------------------------
         */
        for (i = 0; i < 4; i++) {
                ets_cfg->prio_table[i * 2] =
                        ((buf[offset] & ICE_IEEE_ETS_PRIO_1_M) >>
                         ICE_IEEE_ETS_PRIO_1_S);
                ets_cfg->prio_table[i * 2 + 1] =
                        ((buf[offset] & ICE_IEEE_ETS_PRIO_0_M) >>
                         ICE_IEEE_ETS_PRIO_0_S);
                offset++;
        }

        /* TC Bandwidth Table (8 octets)
         * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
         *        ---------------------------------
         *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
         *        ---------------------------------
         *
         * TSA Assignment Table (8 octets)
         * Octets:| 9 | 10| 11| 12| 13| 14| 15| 16|
         *        ---------------------------------
         *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
         *        ---------------------------------
         */
        ice_for_each_traffic_class(i) {
                ets_cfg->tcbwtable[i] = buf[offset];
                ets_cfg->tsatable[i] = buf[ICE_MAX_TRAFFIC_CLASS + offset++];
        }
}

/**
 * ice_parse_ieee_etscfg_tlv
 * @tlv: IEEE 802.1Qaz ETS CFG TLV
 * @dcbcfg: Local store to update ETS CFG data
 *
 * Parses IEEE 802.1Qaz ETS CFG TLV
 */
static void
ice_parse_ieee_etscfg_tlv(struct ice_lldp_org_tlv *tlv,
                          struct ice_dcbx_cfg *dcbcfg)
{
        struct ice_dcb_ets_cfg *etscfg;
        u8 *buf = tlv->tlvinfo;

        /* First Octet post subtype
         * --------------------------
         * |will-|CBS  | Re-  | Max |
         * |ing  |     |served| TCs |
         * --------------------------
         * |1bit | 1bit|3 bits|3bits|
         */
        etscfg = &dcbcfg->etscfg;
        etscfg->willing = ((buf[0] & ICE_IEEE_ETS_WILLING_M) >>
                           ICE_IEEE_ETS_WILLING_S);
        etscfg->cbs = ((buf[0] & ICE_IEEE_ETS_CBS_M) >> ICE_IEEE_ETS_CBS_S);
        etscfg->maxtcs = ((buf[0] & ICE_IEEE_ETS_MAXTC_M) >>
                          ICE_IEEE_ETS_MAXTC_S);

        /* Begin parsing at Priority Assignment Table (offset 1 in buf) */
        ice_parse_ieee_ets_common_tlv(&buf[1], etscfg);
}

/**
 * ice_parse_ieee_etsrec_tlv
 * @tlv: IEEE 802.1Qaz ETS REC TLV
 * @dcbcfg: Local store to update ETS REC data
 *
 * Parses IEEE 802.1Qaz ETS REC TLV
 */
static void
ice_parse_ieee_etsrec_tlv(struct ice_lldp_org_tlv *tlv,
                          struct ice_dcbx_cfg *dcbcfg)
{
        u8 *buf = tlv->tlvinfo;

        /* Begin parsing at Priority Assignment Table (offset 1 in buf) */
        ice_parse_ieee_ets_common_tlv(&buf[1], &dcbcfg->etsrec);
}

/**
 * ice_parse_ieee_pfccfg_tlv
 * @tlv: IEEE 802.1Qaz PFC CFG TLV
 * @dcbcfg: Local store to update PFC CFG data
 *
 * Parses IEEE 802.1Qaz PFC CFG TLV
 */
static void
ice_parse_ieee_pfccfg_tlv(struct ice_lldp_org_tlv *tlv,
                          struct ice_dcbx_cfg *dcbcfg)
{
        u8 *buf = tlv->tlvinfo;

        /* ----------------------------------------
         * |will-|MBC  | Re-  | PFC |  PFC Enable  |
         * |ing  |     |served| cap |              |
         * -----------------------------------------
         * |1bit | 1bit|2 bits|4bits| 1 octet      |
         */
        dcbcfg->pfc.willing = ((buf[0] & ICE_IEEE_PFC_WILLING_M) >>
                               ICE_IEEE_PFC_WILLING_S);
        dcbcfg->pfc.mbc = ((buf[0] & ICE_IEEE_PFC_MBC_M) >> ICE_IEEE_PFC_MBC_S);
        dcbcfg->pfc.pfccap = ((buf[0] & ICE_IEEE_PFC_CAP_M) >>
                              ICE_IEEE_PFC_CAP_S);
        dcbcfg->pfc.pfcena = buf[1];
}

/**
 * ice_parse_ieee_app_tlv
 * @tlv: IEEE 802.1Qaz APP TLV
 * @dcbcfg: Local store to update APP PRIO data
 *
 * Parses IEEE 802.1Qaz APP PRIO TLV
 */
static void
ice_parse_ieee_app_tlv(struct ice_lldp_org_tlv *tlv,
                       struct ice_dcbx_cfg *dcbcfg)
{
        u16 offset = 0;
        u16 typelen;
        int i = 0;
        u16 len;
        u8 *buf;

        typelen = ntohs(tlv->typelen);
        len = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
        buf = tlv->tlvinfo;

        /* Removing sizeof(ouisubtype) and reserved byte from len.
         * Remaining len div 3 is number of APP TLVs.
         */
        len -= (sizeof(tlv->ouisubtype) + 1);

        /* Move offset to App Priority Table */
        offset++;

        /* Application Priority Table (3 octets)
         * Octets:|         1          |    2    |    3    |
         *        -----------------------------------------
         *        |Priority|Rsrvd| Sel |    Protocol ID    |
         *        -----------------------------------------
         *   Bits:|23    21|20 19|18 16|15                0|
         *        -----------------------------------------
         */
        while (offset < len) {
                dcbcfg->app[i].priority = ((buf[offset] &
                                            ICE_IEEE_APP_PRIO_M) >>
                                           ICE_IEEE_APP_PRIO_S);
                dcbcfg->app[i].selector = ((buf[offset] &
                                            ICE_IEEE_APP_SEL_M) >>
                                           ICE_IEEE_APP_SEL_S);
                dcbcfg->app[i].prot_id = (buf[offset + 1] << 0x8) |
                        buf[offset + 2];
                /* Move to next app */
                offset += 3;
                i++;
                if (i >= ICE_DCBX_MAX_APPS)
                        break;
        }

        dcbcfg->numapps = i;
}

/**
 * ice_parse_ieee_tlv
 * @tlv: IEEE 802.1Qaz TLV
 * @dcbcfg: Local store to update ETS REC data
 *
 * Get the TLV subtype and send it to parsing function
 * based on the subtype value
 */
static void
ice_parse_ieee_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
{
        u32 ouisubtype;
        u8 subtype;

        ouisubtype = ntohl(tlv->ouisubtype);
        subtype = (u8)((ouisubtype & ICE_LLDP_TLV_SUBTYPE_M) >>
                       ICE_LLDP_TLV_SUBTYPE_S);
        switch (subtype) {
        case ICE_IEEE_SUBTYPE_ETS_CFG:
                ice_parse_ieee_etscfg_tlv(tlv, dcbcfg);
                break;
        case ICE_IEEE_SUBTYPE_ETS_REC:
                ice_parse_ieee_etsrec_tlv(tlv, dcbcfg);
                break;
        case ICE_IEEE_SUBTYPE_PFC_CFG:
                ice_parse_ieee_pfccfg_tlv(tlv, dcbcfg);
                break;
        case ICE_IEEE_SUBTYPE_APP_PRI:
                ice_parse_ieee_app_tlv(tlv, dcbcfg);
                break;
        default:
                break;
        }
}

/**
 * ice_parse_cee_pgcfg_tlv
 * @tlv: CEE DCBX PG CFG TLV
 * @dcbcfg: Local store to update ETS CFG data
 *
 * Parses CEE DCBX PG CFG TLV
 */
static void
ice_parse_cee_pgcfg_tlv(struct ice_cee_feat_tlv *tlv,
                        struct ice_dcbx_cfg *dcbcfg)
{
        struct ice_dcb_ets_cfg *etscfg;
        u8 *buf = tlv->tlvinfo;
        u16 offset = 0;
        int i;

        etscfg = &dcbcfg->etscfg;

        if (tlv->en_will_err & ICE_CEE_FEAT_TLV_WILLING_M)
                etscfg->willing = 1;

        etscfg->cbs = 0;
        /* Priority Group Table (4 octets)
         * Octets:|    1    |    2    |    3    |    4    |
         *        -----------------------------------------
         *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
         *        -----------------------------------------
         *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
         *        -----------------------------------------
         */
        for (i = 0; i < 4; i++) {
                etscfg->prio_table[i * 2] =
                        ((buf[offset] & ICE_CEE_PGID_PRIO_1_M) >>
                         ICE_CEE_PGID_PRIO_1_S);
                etscfg->prio_table[i * 2 + 1] =
                        ((buf[offset] & ICE_CEE_PGID_PRIO_0_M) >>
                         ICE_CEE_PGID_PRIO_0_S);
                offset++;
        }

        /* PG Percentage Table (8 octets)
         * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
         *        ---------------------------------
         *        |pg0|pg1|pg2|pg3|pg4|pg5|pg6|pg7|
         *        ---------------------------------
         */
        ice_for_each_traffic_class(i)
                etscfg->tcbwtable[i] = buf[offset++];

        /* Number of TCs supported (1 octet) */
        etscfg->maxtcs = buf[offset];
}

/**
 * ice_parse_cee_pfccfg_tlv
 * @tlv: CEE DCBX PFC CFG TLV
 * @dcbcfg: Local store to update PFC CFG data
 *
 * Parses CEE DCBX PFC CFG TLV
 */
static void
ice_parse_cee_pfccfg_tlv(struct ice_cee_feat_tlv *tlv,
                         struct ice_dcbx_cfg *dcbcfg)
{
        u8 *buf = tlv->tlvinfo;

        if (tlv->en_will_err & ICE_CEE_FEAT_TLV_WILLING_M)
                dcbcfg->pfc.willing = 1;

        /* ------------------------
         * | PFC Enable | PFC TCs |
         * ------------------------
         * | 1 octet    | 1 octet |
         */
        dcbcfg->pfc.pfcena = buf[0];
        dcbcfg->pfc.pfccap = buf[1];
}

/**
 * ice_parse_cee_app_tlv
 * @tlv: CEE DCBX APP TLV
 * @dcbcfg: Local store to update APP PRIO data
 *
 * Parses CEE DCBX APP PRIO TLV
 */
static void
ice_parse_cee_app_tlv(struct ice_cee_feat_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
{
        u16 len, typelen, offset = 0;
        struct ice_cee_app_prio *app;
        u8 i;

        typelen = ntohs(tlv->hdr.typelen);
        len = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);

        dcbcfg->numapps = len / sizeof(*app);
        if (!dcbcfg->numapps)
                return;
        if (dcbcfg->numapps > ICE_DCBX_MAX_APPS)
                dcbcfg->numapps = ICE_DCBX_MAX_APPS;

        for (i = 0; i < dcbcfg->numapps; i++) {
                u8 up, selector;

                app = (struct ice_cee_app_prio *)(tlv->tlvinfo + offset);
                for (up = 0; up < ICE_MAX_USER_PRIORITY; up++)
                        if (app->prio_map & BIT(up))
                                break;

                dcbcfg->app[i].priority = up;

                /* Get Selector from lower 2 bits, and convert to IEEE */
                selector = (app->upper_oui_sel & ICE_CEE_APP_SELECTOR_M);
                switch (selector) {
                case ICE_CEE_APP_SEL_ETHTYPE:
                        dcbcfg->app[i].selector = ICE_APP_SEL_ETHTYPE;
                        break;
                case ICE_CEE_APP_SEL_TCPIP:
                        dcbcfg->app[i].selector = ICE_APP_SEL_TCPIP;
                        break;
                default:
                        /* Keep selector as it is for unknown types */
                        dcbcfg->app[i].selector = selector;
                }

                dcbcfg->app[i].prot_id = ntohs(app->protocol);
                /* Move to next app */
                offset += sizeof(*app);
        }
}

/**
 * ice_parse_cee_tlv
 * @tlv: CEE DCBX TLV
 * @dcbcfg: Local store to update DCBX config data
 *
 * Get the TLV subtype and send it to parsing function
 * based on the subtype value
 */
static void
ice_parse_cee_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
{
        struct ice_cee_feat_tlv *sub_tlv;
        u8 subtype, feat_tlv_count = 0;
        u16 len, tlvlen, typelen;
        u32 ouisubtype;

        ouisubtype = ntohl(tlv->ouisubtype);
        subtype = (u8)((ouisubtype & ICE_LLDP_TLV_SUBTYPE_M) >>
                       ICE_LLDP_TLV_SUBTYPE_S);
        /* Return if not CEE DCBX */
        if (subtype != ICE_CEE_DCBX_TYPE)
                return;

        typelen = ntohs(tlv->typelen);
        tlvlen = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
        len = sizeof(tlv->typelen) + sizeof(ouisubtype) +
                sizeof(struct ice_cee_ctrl_tlv);
        /* Return if no CEE DCBX Feature TLVs */
        if (tlvlen <= len)
                return;

        sub_tlv = (struct ice_cee_feat_tlv *)((char *)tlv + len);
        while (feat_tlv_count < ICE_CEE_MAX_FEAT_TYPE) {
                u16 sublen;

                typelen = ntohs(sub_tlv->hdr.typelen);
                sublen = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
                subtype = (u8)((typelen & ICE_LLDP_TLV_TYPE_M) >>
                               ICE_LLDP_TLV_TYPE_S);
                switch (subtype) {
                case ICE_CEE_SUBTYPE_PG_CFG:
                        ice_parse_cee_pgcfg_tlv(sub_tlv, dcbcfg);
                        break;
                case ICE_CEE_SUBTYPE_PFC_CFG:
                        ice_parse_cee_pfccfg_tlv(sub_tlv, dcbcfg);
                        break;
                case ICE_CEE_SUBTYPE_APP_PRI:
                        ice_parse_cee_app_tlv(sub_tlv, dcbcfg);
                        break;
                default:
                        return; /* Invalid Sub-type return */
                }
                feat_tlv_count++;
                /* Move to next sub TLV */
                sub_tlv = (struct ice_cee_feat_tlv *)
                          ((char *)sub_tlv + sizeof(sub_tlv->hdr.typelen) +
                           sublen);
        }
}

/**
 * ice_parse_org_tlv
 * @tlv: Organization specific TLV
 * @dcbcfg: Local store to update ETS REC data
 *
 * Currently only IEEE 802.1Qaz TLV is supported, all others
 * will be returned
 */
static void
ice_parse_org_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
{
        u32 ouisubtype;
        u32 oui;

        ouisubtype = ntohl(tlv->ouisubtype);
        oui = ((ouisubtype & ICE_LLDP_TLV_OUI_M) >> ICE_LLDP_TLV_OUI_S);
        switch (oui) {
        case ICE_IEEE_8021QAZ_OUI:
                ice_parse_ieee_tlv(tlv, dcbcfg);
                break;
        case ICE_CEE_DCBX_OUI:
                ice_parse_cee_tlv(tlv, dcbcfg);
                break;
        default:
                break;
        }
}

/**
 * ice_lldp_to_dcb_cfg
 * @lldpmib: LLDPDU to be parsed
 * @dcbcfg: store for LLDPDU data
 *
 * Parse DCB configuration from the LLDPDU
 */
static enum ice_status
ice_lldp_to_dcb_cfg(u8 *lldpmib, struct ice_dcbx_cfg *dcbcfg)
{
        struct ice_lldp_org_tlv *tlv;
        enum ice_status ret = 0;
        u16 offset = 0;
        u16 typelen;
        u16 type;
        u16 len;

        if (!lldpmib || !dcbcfg)
                return ICE_ERR_PARAM;

        /* set to the start of LLDPDU */
        lldpmib += ETH_HLEN;
        tlv = (struct ice_lldp_org_tlv *)lldpmib;
        while (1) {
                typelen = ntohs(tlv->typelen);
                type = ((typelen & ICE_LLDP_TLV_TYPE_M) >> ICE_LLDP_TLV_TYPE_S);
                len = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
                offset += sizeof(typelen) + len;

                /* END TLV or beyond LLDPDU size */
                if (type == ICE_TLV_TYPE_END || offset > ICE_LLDPDU_SIZE)
                        break;

                switch (type) {
                case ICE_TLV_TYPE_ORG:
                        ice_parse_org_tlv(tlv, dcbcfg);
                        break;
                default:
                        break;
                }

                /* Move to next TLV */
                tlv = (struct ice_lldp_org_tlv *)
                      ((char *)tlv + sizeof(tlv->typelen) + len);
        }

        return ret;
}

/**
 * ice_aq_get_dcb_cfg
 * @hw: pointer to the HW struct
 * @mib_type: MIB type for the query
 * @bridgetype: bridge type for the query (remote)
 * @dcbcfg: store for LLDPDU data
 *
 * Query DCB configuration from the firmware
 */
enum ice_status
ice_aq_get_dcb_cfg(struct ice_hw *hw, u8 mib_type, u8 bridgetype,
                   struct ice_dcbx_cfg *dcbcfg)
{
        enum ice_status ret;
        u8 *lldpmib;

        /* Allocate the LLDPDU */
        lldpmib = devm_kzalloc(ice_hw_to_dev(hw), ICE_LLDPDU_SIZE, GFP_KERNEL);
        if (!lldpmib)
                return ICE_ERR_NO_MEMORY;

        ret = ice_aq_get_lldp_mib(hw, bridgetype, mib_type, (void *)lldpmib,
                                  ICE_LLDPDU_SIZE, NULL, NULL, NULL);

        if (!ret)
                /* Parse LLDP MIB to get DCB configuration */
                ret = ice_lldp_to_dcb_cfg(lldpmib, dcbcfg);

        devm_kfree(ice_hw_to_dev(hw), lldpmib);

        return ret;
}

/**
 * ice_aq_start_stop_dcbx - Start/Stop DCBX service in FW
 * @hw: pointer to the HW struct
 * @start_dcbx_agent: True if DCBX Agent needs to be started
 *                    False if DCBX Agent needs to be stopped
 * @dcbx_agent_status: FW indicates back the DCBX agent status
 *                     True if DCBX Agent is active
 *                     False if DCBX Agent is stopped
 * @cd: pointer to command details structure or NULL
 *
 * Start/Stop the embedded dcbx Agent. In case that this wrapper function
 * returns ICE_SUCCESS, caller will need to check if FW returns back the same
 * value as stated in dcbx_agent_status, and react accordingly. (0x0A09)
 */
enum ice_status
ice_aq_start_stop_dcbx(struct ice_hw *hw, bool start_dcbx_agent,
                       bool *dcbx_agent_status, struct ice_sq_cd *cd)
{
        struct ice_aqc_lldp_stop_start_specific_agent *cmd;
        enum ice_status status;
        struct ice_aq_desc desc;
        u16 opcode;

        cmd = &desc.params.lldp_agent_ctrl;

        opcode = ice_aqc_opc_lldp_stop_start_specific_agent;

        ice_fill_dflt_direct_cmd_desc(&desc, opcode);

        if (start_dcbx_agent)
                cmd->command = ICE_AQC_START_STOP_AGENT_START_DCBX;

        status = ice_aq_send_cmd(hw, &desc, NULL, 0, cd);

        *dcbx_agent_status = false;

        if (!status &&
            cmd->command == ICE_AQC_START_STOP_AGENT_START_DCBX)
                *dcbx_agent_status = true;

        return status;
}

/**
 * ice_aq_get_cee_dcb_cfg
 * @hw: pointer to the HW struct
 * @buff: response buffer that stores CEE operational configuration
 * @cd: pointer to command details structure or NULL
 *
 * Get CEE DCBX mode operational configuration from firmware (0x0A07)
 */
static enum ice_status
ice_aq_get_cee_dcb_cfg(struct ice_hw *hw,
                       struct ice_aqc_get_cee_dcb_cfg_resp *buff,
                       struct ice_sq_cd *cd)
{
        struct ice_aq_desc desc;

        ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_get_cee_dcb_cfg);

        return ice_aq_send_cmd(hw, &desc, (void *)buff, sizeof(*buff), cd);
}

/**
 * ice_cee_to_dcb_cfg
 * @cee_cfg: pointer to CEE configuration struct
 * @dcbcfg: DCB configuration struct
 *
 * Convert CEE configuration from firmware to DCB configuration
 */
static void
ice_cee_to_dcb_cfg(struct ice_aqc_get_cee_dcb_cfg_resp *cee_cfg,
                   struct ice_dcbx_cfg *dcbcfg)
{
        u32 status, tlv_status = le32_to_cpu(cee_cfg->tlv_status);
        u32 ice_aqc_cee_status_mask, ice_aqc_cee_status_shift;
        u16 app_prio = le16_to_cpu(cee_cfg->oper_app_prio);
        u8 i, err, sync, oper, app_index, ice_app_sel_type;
        u16 ice_aqc_cee_app_mask, ice_aqc_cee_app_shift;
        u16 ice_app_prot_id_type;

        /* CEE PG data to ETS config */
        dcbcfg->etscfg.maxtcs = cee_cfg->oper_num_tc;

        /* Note that the FW creates the oper_prio_tc nibbles reversed
         * from those in the CEE Priority Group sub-TLV.
         */
        for (i = 0; i < ICE_MAX_TRAFFIC_CLASS / 2; i++) {
                dcbcfg->etscfg.prio_table[i * 2] =
                        ((cee_cfg->oper_prio_tc[i] & ICE_CEE_PGID_PRIO_0_M) >>
                         ICE_CEE_PGID_PRIO_0_S);
                dcbcfg->etscfg.prio_table[i * 2 + 1] =
                        ((cee_cfg->oper_prio_tc[i] & ICE_CEE_PGID_PRIO_1_M) >>
                         ICE_CEE_PGID_PRIO_1_S);
        }

        ice_for_each_traffic_class(i) {
                dcbcfg->etscfg.tcbwtable[i] = cee_cfg->oper_tc_bw[i];

                if (dcbcfg->etscfg.prio_table[i] == ICE_CEE_PGID_STRICT) {
                        /* Map it to next empty TC */
                        dcbcfg->etscfg.prio_table[i] = cee_cfg->oper_num_tc - 1;
                        dcbcfg->etscfg.tsatable[i] = ICE_IEEE_TSA_STRICT;
                } else {
                        dcbcfg->etscfg.tsatable[i] = ICE_IEEE_TSA_ETS;
                }
        }

        /* CEE PFC data to ETS config */
        dcbcfg->pfc.pfcena = cee_cfg->oper_pfc_en;
        dcbcfg->pfc.pfccap = ICE_MAX_TRAFFIC_CLASS;

        app_index = 0;
        for (i = 0; i < 3; i++) {
                if (i == 0) {
                        /* FCoE APP */
                        ice_aqc_cee_status_mask = ICE_AQC_CEE_FCOE_STATUS_M;
                        ice_aqc_cee_status_shift = ICE_AQC_CEE_FCOE_STATUS_S;
                        ice_aqc_cee_app_mask = ICE_AQC_CEE_APP_FCOE_M;
                        ice_aqc_cee_app_shift = ICE_AQC_CEE_APP_FCOE_S;
                        ice_app_sel_type = ICE_APP_SEL_ETHTYPE;
                        ice_app_prot_id_type = ICE_APP_PROT_ID_FCOE;
                } else if (i == 1) {
                        /* iSCSI APP */
                        ice_aqc_cee_status_mask = ICE_AQC_CEE_ISCSI_STATUS_M;
                        ice_aqc_cee_status_shift = ICE_AQC_CEE_ISCSI_STATUS_S;
                        ice_aqc_cee_app_mask = ICE_AQC_CEE_APP_ISCSI_M;
                        ice_aqc_cee_app_shift = ICE_AQC_CEE_APP_ISCSI_S;
                        ice_app_sel_type = ICE_APP_SEL_TCPIP;
                        ice_app_prot_id_type = ICE_APP_PROT_ID_ISCSI;
                } else {
                        /* FIP APP */
                        ice_aqc_cee_status_mask = ICE_AQC_CEE_FIP_STATUS_M;
                        ice_aqc_cee_status_shift = ICE_AQC_CEE_FIP_STATUS_S;
                        ice_aqc_cee_app_mask = ICE_AQC_CEE_APP_FIP_M;
                        ice_aqc_cee_app_shift = ICE_AQC_CEE_APP_FIP_S;
                        ice_app_sel_type = ICE_APP_SEL_ETHTYPE;
                        ice_app_prot_id_type = ICE_APP_PROT_ID_FIP;
                }

                status = (tlv_status & ice_aqc_cee_status_mask) >>
                         ice_aqc_cee_status_shift;
                err = (status & ICE_TLV_STATUS_ERR) ? 1 : 0;
                sync = (status & ICE_TLV_STATUS_SYNC) ? 1 : 0;
                oper = (status & ICE_TLV_STATUS_OPER) ? 1 : 0;
                /* Add FCoE/iSCSI/FIP APP if Error is False and
                 * Oper/Sync is True
                 */
                if (!err && sync && oper) {
                        dcbcfg->app[app_index].priority =
                                (app_prio & ice_aqc_cee_app_mask) >>
                                ice_aqc_cee_app_shift;
                        dcbcfg->app[app_index].selector = ice_app_sel_type;
                        dcbcfg->app[app_index].prot_id = ice_app_prot_id_type;
                        app_index++;
                }
        }

        dcbcfg->numapps = app_index;
}

/**
 * ice_get_ieee_dcb_cfg
 * @pi: port information structure
 * @dcbx_mode: mode of DCBX (IEEE or CEE)
 *
 * Get IEEE or CEE mode DCB configuration from the Firmware
 */
static enum ice_status
ice_get_ieee_or_cee_dcb_cfg(struct ice_port_info *pi, u8 dcbx_mode)
{
        struct ice_dcbx_cfg *dcbx_cfg = NULL;
        enum ice_status ret;

        if (!pi)
                return ICE_ERR_PARAM;

        if (dcbx_mode == ICE_DCBX_MODE_IEEE)
                dcbx_cfg = &pi->local_dcbx_cfg;
        else if (dcbx_mode == ICE_DCBX_MODE_CEE)
                dcbx_cfg = &pi->desired_dcbx_cfg;

        /* Get Local DCB Config in case of ICE_DCBX_MODE_IEEE
         * or get CEE DCB Desired Config in case of ICE_DCBX_MODE_CEE
         */
        ret = ice_aq_get_dcb_cfg(pi->hw, ICE_AQ_LLDP_MIB_LOCAL,
                                 ICE_AQ_LLDP_BRID_TYPE_NEAREST_BRID, dcbx_cfg);
        if (ret)
                goto out;

        /* Get Remote DCB Config */
        dcbx_cfg = &pi->remote_dcbx_cfg;
        ret = ice_aq_get_dcb_cfg(pi->hw, ICE_AQ_LLDP_MIB_REMOTE,
                                 ICE_AQ_LLDP_BRID_TYPE_NEAREST_BRID, dcbx_cfg);
        /* Don't treat ENOENT as an error for Remote MIBs */
        if (pi->hw->adminq.sq_last_status == ICE_AQ_RC_ENOENT)
                ret = 0;

out:
        return ret;
}

/**
 * ice_get_dcb_cfg
 * @pi: port information structure
 *
 * Get DCB configuration from the Firmware
 */
enum ice_status ice_get_dcb_cfg(struct ice_port_info *pi)
{
        struct ice_aqc_get_cee_dcb_cfg_resp cee_cfg;
        struct ice_dcbx_cfg *dcbx_cfg;
        enum ice_status ret;

        if (!pi)
                return ICE_ERR_PARAM;

        ret = ice_aq_get_cee_dcb_cfg(pi->hw, &cee_cfg, NULL);
        if (!ret) {
                /* CEE mode */
                dcbx_cfg = &pi->local_dcbx_cfg;
                dcbx_cfg->dcbx_mode = ICE_DCBX_MODE_CEE;
                dcbx_cfg->tlv_status = le32_to_cpu(cee_cfg.tlv_status);
                ice_cee_to_dcb_cfg(&cee_cfg, dcbx_cfg);
                ret = ice_get_ieee_or_cee_dcb_cfg(pi, ICE_DCBX_MODE_CEE);
        } else if (pi->hw->adminq.sq_last_status == ICE_AQ_RC_ENOENT) {
                /* CEE mode not enabled try querying IEEE data */
                dcbx_cfg = &pi->local_dcbx_cfg;
                dcbx_cfg->dcbx_mode = ICE_DCBX_MODE_IEEE;
                ret = ice_get_ieee_or_cee_dcb_cfg(pi, ICE_DCBX_MODE_IEEE);
        }

        return ret;
}

/**
 * ice_init_dcb
 * @hw: pointer to the HW struct
 *
 * Update DCB configuration from the Firmware
 */
enum ice_status ice_init_dcb(struct ice_hw *hw)
{
        struct ice_port_info *pi = hw->port_info;
        enum ice_status ret = 0;

        if (!hw->func_caps.common_cap.dcb)
                return ICE_ERR_NOT_SUPPORTED;

        pi->is_sw_lldp = true;

        /* Get DCBX status */
        pi->dcbx_status = ice_get_dcbx_status(hw);

        if (pi->dcbx_status == ICE_DCBX_STATUS_DONE ||
            pi->dcbx_status == ICE_DCBX_STATUS_IN_PROGRESS) {
                /* Get current DCBX configuration */
                ret = ice_get_dcb_cfg(pi);
                pi->is_sw_lldp = (hw->adminq.sq_last_status == ICE_AQ_RC_EPERM);
                if (ret)
                        return ret;
        } else if (pi->dcbx_status == ICE_DCBX_STATUS_DIS) {
                return ICE_ERR_NOT_READY;
        }

        /* Configure the LLDP MIB change event */
        ret = ice_aq_cfg_lldp_mib_change(hw, true, NULL);
        if (!ret)
                pi->is_sw_lldp = false;

        return ret;
}

/**
 * ice_add_ieee_ets_common_tlv
 * @buf: Data buffer to be populated with ice_dcb_ets_cfg data
 * @ets_cfg: Container for ice_dcb_ets_cfg data
 *
 * Populate the TLV buffer with ice_dcb_ets_cfg data
 */
static void
ice_add_ieee_ets_common_tlv(u8 *buf, struct ice_dcb_ets_cfg *ets_cfg)
{
        u8 priority0, priority1;
        u8 offset = 0;
        int i;

        /* Priority Assignment Table (4 octets)
         * Octets:|    1    |    2    |    3    |    4    |
         *        -----------------------------------------
         *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
         *        -----------------------------------------
         *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
         *        -----------------------------------------
         */
        for (i = 0; i < ICE_MAX_TRAFFIC_CLASS / 2; i++) {
                priority0 = ets_cfg->prio_table[i * 2] & 0xF;
                priority1 = ets_cfg->prio_table[i * 2 + 1] & 0xF;
                buf[offset] = (priority0 << ICE_IEEE_ETS_PRIO_1_S) | priority1;

                offset++;
        }

        /* TC Bandwidth Table (8 octets)
         * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
         *        ---------------------------------
         *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
         *        ---------------------------------
         *
         * TSA Assignment Table (8 octets)
         * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
         *        ---------------------------------
         *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
         *        ---------------------------------
         */
        ice_for_each_traffic_class(i) {
                buf[offset] = ets_cfg->tcbwtable[i];
                buf[ICE_MAX_TRAFFIC_CLASS + offset] = ets_cfg->tsatable[i];
                offset++;
        }
}

/**
 * ice_add_ieee_ets_tlv - Prepare ETS TLV in IEEE format
 * @tlv: Fill the ETS config data in IEEE format
 * @dcbcfg: Local store which holds the DCB Config
 *
 * Prepare IEEE 802.1Qaz ETS CFG TLV
 */
static void
ice_add_ieee_ets_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
{
        struct ice_dcb_ets_cfg *etscfg;
        u8 *buf = tlv->tlvinfo;
        u8 maxtcwilling = 0;
        u32 ouisubtype;
        u16 typelen;

        typelen = ((ICE_TLV_TYPE_ORG << ICE_LLDP_TLV_TYPE_S) |
                   ICE_IEEE_ETS_TLV_LEN);
        tlv->typelen = htons(typelen);

        ouisubtype = ((ICE_IEEE_8021QAZ_OUI << ICE_LLDP_TLV_OUI_S) |
                      ICE_IEEE_SUBTYPE_ETS_CFG);
        tlv->ouisubtype = htonl(ouisubtype);

        /* First Octet post subtype
         * --------------------------
         * |will-|CBS  | Re-  | Max |
         * |ing  |     |served| TCs |
         * --------------------------
         * |1bit | 1bit|3 bits|3bits|
         */
        etscfg = &dcbcfg->etscfg;
        if (etscfg->willing)
                maxtcwilling = BIT(ICE_IEEE_ETS_WILLING_S);
        maxtcwilling |= etscfg->maxtcs & ICE_IEEE_ETS_MAXTC_M;
        buf[0] = maxtcwilling;

        /* Begin adding at Priority Assignment Table (offset 1 in buf) */
        ice_add_ieee_ets_common_tlv(&buf[1], etscfg);
}

/**
 * ice_add_ieee_etsrec_tlv - Prepare ETS Recommended TLV in IEEE format
 * @tlv: Fill ETS Recommended TLV in IEEE format
 * @dcbcfg: Local store which holds the DCB Config
 *
 * Prepare IEEE 802.1Qaz ETS REC TLV
 */
static void
ice_add_ieee_etsrec_tlv(struct ice_lldp_org_tlv *tlv,
                        struct ice_dcbx_cfg *dcbcfg)
{
        struct ice_dcb_ets_cfg *etsrec;
        u8 *buf = tlv->tlvinfo;
        u32 ouisubtype;
        u16 typelen;

        typelen = ((ICE_TLV_TYPE_ORG << ICE_LLDP_TLV_TYPE_S) |
                   ICE_IEEE_ETS_TLV_LEN);
        tlv->typelen = htons(typelen);

        ouisubtype = ((ICE_IEEE_8021QAZ_OUI << ICE_LLDP_TLV_OUI_S) |
                      ICE_IEEE_SUBTYPE_ETS_REC);
        tlv->ouisubtype = htonl(ouisubtype);

        etsrec = &dcbcfg->etsrec;

        /* First Octet is reserved */
        /* Begin adding at Priority Assignment Table (offset 1 in buf) */
        ice_add_ieee_ets_common_tlv(&buf[1], etsrec);
}

/**
 * ice_add_ieee_pfc_tlv - Prepare PFC TLV in IEEE format
 * @tlv: Fill PFC TLV in IEEE format
 * @dcbcfg: Local store which holds the PFC CFG data
 *
 * Prepare IEEE 802.1Qaz PFC CFG TLV
 */
static void
ice_add_ieee_pfc_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
{
        u8 *buf = tlv->tlvinfo;
        u32 ouisubtype;
        u16 typelen;

        typelen = ((ICE_TLV_TYPE_ORG << ICE_LLDP_TLV_TYPE_S) |
                   ICE_IEEE_PFC_TLV_LEN);
        tlv->typelen = htons(typelen);

        ouisubtype = ((ICE_IEEE_8021QAZ_OUI << ICE_LLDP_TLV_OUI_S) |
                      ICE_IEEE_SUBTYPE_PFC_CFG);
        tlv->ouisubtype = htonl(ouisubtype);

        /* ----------------------------------------
         * |will-|MBC  | Re-  | PFC |  PFC Enable  |
         * |ing  |     |served| cap |              |
         * -----------------------------------------
         * |1bit | 1bit|2 bits|4bits| 1 octet      |
         */
        if (dcbcfg->pfc.willing)
                buf[0] = BIT(ICE_IEEE_PFC_WILLING_S);

        if (dcbcfg->pfc.mbc)
                buf[0] |= BIT(ICE_IEEE_PFC_MBC_S);

        buf[0] |= dcbcfg->pfc.pfccap & 0xF;
        buf[1] = dcbcfg->pfc.pfcena;
}

/**
 * ice_add_ieee_app_pri_tlv -  Prepare APP TLV in IEEE format
 * @tlv: Fill APP TLV in IEEE format
 * @dcbcfg: Local store which holds the APP CFG data
 *
 * Prepare IEEE 802.1Qaz APP CFG TLV
 */
static void
ice_add_ieee_app_pri_tlv(struct ice_lldp_org_tlv *tlv,
                         struct ice_dcbx_cfg *dcbcfg)
{
        u16 typelen, len, offset = 0;
        u8 priority, selector, i = 0;
        u8 *buf = tlv->tlvinfo;
        u32 ouisubtype;

        /* No APP TLVs then just return */
        if (dcbcfg->numapps == 0)
                return;
        ouisubtype = ((ICE_IEEE_8021QAZ_OUI << ICE_LLDP_TLV_OUI_S) |
                      ICE_IEEE_SUBTYPE_APP_PRI);
        tlv->ouisubtype = htonl(ouisubtype);

        /* Move offset to App Priority Table */
        offset++;
        /* Application Priority Table (3 octets)
         * Octets:|         1          |    2    |    3    |
         *        -----------------------------------------
         *        |Priority|Rsrvd| Sel |    Protocol ID    |
         *        -----------------------------------------
         *   Bits:|23    21|20 19|18 16|15                0|
         *        -----------------------------------------
         */
        while (i < dcbcfg->numapps) {
                priority = dcbcfg->app[i].priority & 0x7;
                selector = dcbcfg->app[i].selector & 0x7;
                buf[offset] = (priority << ICE_IEEE_APP_PRIO_S) | selector;
                buf[offset + 1] = (dcbcfg->app[i].prot_id >> 0x8) & 0xFF;
                buf[offset + 2] = dcbcfg->app[i].prot_id & 0xFF;
                /* Move to next app */
                offset += 3;
                i++;
                if (i >= ICE_DCBX_MAX_APPS)
                        break;
        }
        /* len includes size of ouisubtype + 1 reserved + 3*numapps */
        len = sizeof(tlv->ouisubtype) + 1 + (i * 3);
        typelen = ((ICE_TLV_TYPE_ORG << ICE_LLDP_TLV_TYPE_S) | (len & 0x1FF));
        tlv->typelen = htons(typelen);
}

/**
 * ice_add_dcb_tlv - Add all IEEE TLVs
 * @tlv: Fill TLV data in IEEE format
 * @dcbcfg: Local store which holds the DCB Config
 * @tlvid: Type of IEEE TLV
 *
 * Add tlv information
 */
static void
ice_add_dcb_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg,
                u16 tlvid)
{
        switch (tlvid) {
        case ICE_IEEE_TLV_ID_ETS_CFG:
                ice_add_ieee_ets_tlv(tlv, dcbcfg);
                break;
        case ICE_IEEE_TLV_ID_ETS_REC:
                ice_add_ieee_etsrec_tlv(tlv, dcbcfg);
                break;
        case ICE_IEEE_TLV_ID_PFC_CFG:
                ice_add_ieee_pfc_tlv(tlv, dcbcfg);
                break;
        case ICE_IEEE_TLV_ID_APP_PRI:
                ice_add_ieee_app_pri_tlv(tlv, dcbcfg);
                break;
        default:
                break;
        }
}

/**
 * ice_dcb_cfg_to_lldp - Convert DCB configuration to MIB format
 * @lldpmib: pointer to the HW struct
 * @miblen: length of LLDP MIB
 * @dcbcfg: Local store which holds the DCB Config
 *
 * Convert the DCB configuration to MIB format
 */
static void
ice_dcb_cfg_to_lldp(u8 *lldpmib, u16 *miblen, struct ice_dcbx_cfg *dcbcfg)
{
        u16 len, offset = 0, tlvid = ICE_TLV_ID_START;
        struct ice_lldp_org_tlv *tlv;
        u16 typelen;

        tlv = (struct ice_lldp_org_tlv *)lldpmib;
        while (1) {
                ice_add_dcb_tlv(tlv, dcbcfg, tlvid++);
                typelen = ntohs(tlv->typelen);
                len = (typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S;
                if (len)
                        offset += len + 2;
                /* END TLV or beyond LLDPDU size */
                if (tlvid >= ICE_TLV_ID_END_OF_LLDPPDU ||
                    offset > ICE_LLDPDU_SIZE)
                        break;
                /* Move to next TLV */
                if (len)
                        tlv = (struct ice_lldp_org_tlv *)
                                ((char *)tlv + sizeof(tlv->typelen) + len);
        }
        *miblen = offset;
}

/**
 * ice_set_dcb_cfg - Set the local LLDP MIB to FW
 * @pi: port information structure
 *
 * Set DCB configuration to the Firmware
 */
enum ice_status ice_set_dcb_cfg(struct ice_port_info *pi)
{
        u8 mib_type, *lldpmib = NULL;
        struct ice_dcbx_cfg *dcbcfg;
        enum ice_status ret;
        struct ice_hw *hw;
        u16 miblen;

        if (!pi)
                return ICE_ERR_PARAM;

        hw = pi->hw;

        /* update the HW local config */
        dcbcfg = &pi->local_dcbx_cfg;
        /* Allocate the LLDPDU */
        lldpmib = devm_kzalloc(ice_hw_to_dev(hw), ICE_LLDPDU_SIZE, GFP_KERNEL);
        if (!lldpmib)
                return ICE_ERR_NO_MEMORY;

        mib_type = SET_LOCAL_MIB_TYPE_LOCAL_MIB;
        if (dcbcfg->app_mode == ICE_DCBX_APPS_NON_WILLING)
                mib_type |= SET_LOCAL_MIB_TYPE_CEE_NON_WILLING;

        ice_dcb_cfg_to_lldp(lldpmib, &miblen, dcbcfg);
        ret = ice_aq_set_lldp_mib(hw, mib_type, (void *)lldpmib, miblen,
                                  NULL);

        devm_kfree(ice_hw_to_dev(hw), lldpmib);

        return ret;
}

/**
 * ice_aq_query_port_ets - query port ets configuration
 * @pi: port information structure
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @cd: pointer to command details structure or NULL
 *
 * query current port ets configuration
 */
static enum ice_status
ice_aq_query_port_ets(struct ice_port_info *pi,
                      struct ice_aqc_port_ets_elem *buf, u16 buf_size,
                      struct ice_sq_cd *cd)
{
        struct ice_aqc_query_port_ets *cmd;
        struct ice_aq_desc desc;
        enum ice_status status;

        if (!pi)
                return ICE_ERR_PARAM;
        cmd = &desc.params.port_ets;
        ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_query_port_ets);
        cmd->port_teid = pi->root->info.node_teid;

        status = ice_aq_send_cmd(pi->hw, &desc, buf, buf_size, cd);
        return status;
}

/**
 * ice_update_port_tc_tree_cfg - update TC tree configuration
 * @pi: port information structure
 * @buf: pointer to buffer
 *
 * update the SW DB with the new TC changes
 */
static enum ice_status
ice_update_port_tc_tree_cfg(struct ice_port_info *pi,
                            struct ice_aqc_port_ets_elem *buf)
{
        struct ice_sched_node *node, *tc_node;
        struct ice_aqc_get_elem elem;
        enum ice_status status = 0;
        u32 teid1, teid2;
        u8 i, j;

        if (!pi)
                return ICE_ERR_PARAM;
        /* suspend the missing TC nodes */
        for (i = 0; i < pi->root->num_children; i++) {
                teid1 = le32_to_cpu(pi->root->children[i]->info.node_teid);
                ice_for_each_traffic_class(j) {
                        teid2 = le32_to_cpu(buf->tc_node_teid[j]);
                        if (teid1 == teid2)
                                break;
                }
                if (j < ICE_MAX_TRAFFIC_CLASS)
                        continue;
                /* TC is missing */
                pi->root->children[i]->in_use = false;
        }
        /* add the new TC nodes */
        ice_for_each_traffic_class(j) {
                teid2 = le32_to_cpu(buf->tc_node_teid[j]);
                if (teid2 == ICE_INVAL_TEID)
                        continue;
                /* Is it already present in the tree ? */
                for (i = 0; i < pi->root->num_children; i++) {
                        tc_node = pi->root->children[i];
                        if (!tc_node)
                                continue;
                        teid1 = le32_to_cpu(tc_node->info.node_teid);
                        if (teid1 == teid2) {
                                tc_node->tc_num = j;
                                tc_node->in_use = true;
                                break;
                        }
                }
                if (i < pi->root->num_children)
                        continue;
                /* new TC */
                status = ice_sched_query_elem(pi->hw, teid2, &elem);
                if (!status)
                        status = ice_sched_add_node(pi, 1, &elem.generic[0]);
                if (status)
                        break;
                /* update the TC number */
                node = ice_sched_find_node_by_teid(pi->root, teid2);
                if (node)
                        node->tc_num = j;
        }
        return status;
}

/**
 * ice_query_port_ets - query port ets configuration
 * @pi: port information structure
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @cd: pointer to command details structure or NULL
 *
 * query current port ets configuration and update the
 * SW DB with the TC changes
 */
enum ice_status
ice_query_port_ets(struct ice_port_info *pi,
                   struct ice_aqc_port_ets_elem *buf, u16 buf_size,
                   struct ice_sq_cd *cd)
{
        enum ice_status status;

        mutex_lock(&pi->sched_lock);
        status = ice_aq_query_port_ets(pi, buf, buf_size, cd);
        if (!status)
                status = ice_update_port_tc_tree_cfg(pi, buf);
        mutex_unlock(&pi->sched_lock);
        return status;
}