// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2021 Intel Corporation. */

#ifdef CONFIG_I40E_DCB
#include <net/dcbnl.h>
#include "i40e.h"

#define I40E_DCBNL_STATUS_SUCCESS       0
#define I40E_DCBNL_STATUS_ERROR         1
static bool i40e_dcbnl_find_app(struct i40e_dcbx_config *cfg,
                                struct i40e_dcb_app_priority_table *app);
/**
 * i40e_get_pfc_delay - retrieve PFC Link Delay
 * @hw: pointer to hardware struct
 * @delay: holds the PFC Link delay value
 *
 * Returns PFC Link Delay from the PRTDCB_GENC.PFCLDA
 **/
static void i40e_get_pfc_delay(struct i40e_hw *hw, u16 *delay)
{
        u32 val;

        val = rd32(hw, I40E_PRTDCB_GENC);
        *delay = FIELD_GET(I40E_PRTDCB_GENC_PFCLDA_MASK, val);
}

/**
 * i40e_dcbnl_ieee_getets - retrieve local IEEE ETS configuration
 * @dev: the corresponding netdev
 * @ets: structure to hold the ETS information
 *
 * Returns local IEEE ETS configuration
 **/
static int i40e_dcbnl_ieee_getets(struct net_device *dev,
                                  struct ieee_ets *ets)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(dev);
        struct i40e_dcbx_config *dcbxcfg;

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
                return -EINVAL;

        dcbxcfg = &pf->hw.local_dcbx_config;
        ets->willing = dcbxcfg->etscfg.willing;
        ets->ets_cap = I40E_MAX_TRAFFIC_CLASS;
        ets->cbs = dcbxcfg->etscfg.cbs;
        memcpy(ets->tc_tx_bw, dcbxcfg->etscfg.tcbwtable,
                sizeof(ets->tc_tx_bw));
        memcpy(ets->tc_rx_bw, dcbxcfg->etscfg.tcbwtable,
                sizeof(ets->tc_rx_bw));
        memcpy(ets->tc_tsa, dcbxcfg->etscfg.tsatable,
                sizeof(ets->tc_tsa));
        memcpy(ets->prio_tc, dcbxcfg->etscfg.prioritytable,
                sizeof(ets->prio_tc));
        memcpy(ets->tc_reco_bw, dcbxcfg->etsrec.tcbwtable,
                sizeof(ets->tc_reco_bw));
        memcpy(ets->tc_reco_tsa, dcbxcfg->etsrec.tsatable,
                sizeof(ets->tc_reco_tsa));
        memcpy(ets->reco_prio_tc, dcbxcfg->etscfg.prioritytable,
                sizeof(ets->reco_prio_tc));

        return 0;
}

/**
 * i40e_dcbnl_ieee_getpfc - retrieve local IEEE PFC configuration
 * @dev: the corresponding netdev
 * @pfc: structure to hold the PFC information
 *
 * Returns local IEEE PFC configuration
 **/
static int i40e_dcbnl_ieee_getpfc(struct net_device *dev,
                                  struct ieee_pfc *pfc)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(dev);
        struct i40e_dcbx_config *dcbxcfg;
        struct i40e_hw *hw = &pf->hw;
        int i;

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
                return -EINVAL;

        dcbxcfg = &hw->local_dcbx_config;
        pfc->pfc_cap = dcbxcfg->pfc.pfccap;
        pfc->pfc_en = dcbxcfg->pfc.pfcenable;
        pfc->mbc = dcbxcfg->pfc.mbc;
        i40e_get_pfc_delay(hw, &pfc->delay);

        /* Get Requests/Indications */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                pfc->requests[i] = pf->stats.priority_xoff_tx[i];
                pfc->indications[i] = pf->stats.priority_xoff_rx[i];
        }

        return 0;
}

/**
 * i40e_dcbnl_ieee_setets - set IEEE ETS configuration
 * @netdev: the corresponding netdev
 * @ets: structure to hold the ETS information
 *
 * Set IEEE ETS configuration
 **/
static int i40e_dcbnl_ieee_setets(struct net_device *netdev,
                                  struct ieee_ets *ets)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
        struct i40e_dcbx_config *old_cfg;
        int i, ret;

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return -EINVAL;

        old_cfg = &pf->hw.local_dcbx_config;
        /* Copy current config into temp */
        pf->tmp_cfg = *old_cfg;

        /* Update the ETS configuration for temp */
        pf->tmp_cfg.etscfg.willing = ets->willing;
        pf->tmp_cfg.etscfg.maxtcs = I40E_MAX_TRAFFIC_CLASS;
        pf->tmp_cfg.etscfg.cbs = ets->cbs;
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                pf->tmp_cfg.etscfg.tcbwtable[i] = ets->tc_tx_bw[i];
                pf->tmp_cfg.etscfg.tsatable[i] = ets->tc_tsa[i];
                pf->tmp_cfg.etscfg.prioritytable[i] = ets->prio_tc[i];
                pf->tmp_cfg.etsrec.tcbwtable[i] = ets->tc_reco_bw[i];
                pf->tmp_cfg.etsrec.tsatable[i] = ets->tc_reco_tsa[i];
                pf->tmp_cfg.etsrec.prioritytable[i] = ets->reco_prio_tc[i];
        }

        /* Commit changes to HW */
        ret = i40e_hw_dcb_config(pf, &pf->tmp_cfg);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Failed setting DCB ETS configuration err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         libie_aq_str(pf->hw.aq.asq_last_status));
                return -EINVAL;
        }

        return 0;
}

/**
 * i40e_dcbnl_ieee_setpfc - set local IEEE PFC configuration
 * @netdev: the corresponding netdev
 * @pfc: structure to hold the PFC information
 *
 * Sets local IEEE PFC configuration
 **/
static int i40e_dcbnl_ieee_setpfc(struct net_device *netdev,
                                  struct ieee_pfc *pfc)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
        struct i40e_dcbx_config *old_cfg;
        int ret;

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return -EINVAL;

        old_cfg = &pf->hw.local_dcbx_config;
        /* Copy current config into temp */
        pf->tmp_cfg = *old_cfg;
        if (pfc->pfc_cap)
                pf->tmp_cfg.pfc.pfccap = pfc->pfc_cap;
        else
                pf->tmp_cfg.pfc.pfccap = I40E_MAX_TRAFFIC_CLASS;
        pf->tmp_cfg.pfc.pfcenable = pfc->pfc_en;

        ret = i40e_hw_dcb_config(pf, &pf->tmp_cfg);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Failed setting DCB PFC configuration err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         libie_aq_str(pf->hw.aq.asq_last_status));
                return -EINVAL;
        }

        return 0;
}

/**
 * i40e_dcbnl_ieee_setapp - set local IEEE App configuration
 * @netdev: the corresponding netdev
 * @app: structure to hold the Application information
 *
 * Sets local IEEE App configuration
 **/
static int i40e_dcbnl_ieee_setapp(struct net_device *netdev,
                                  struct dcb_app *app)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
        struct i40e_dcb_app_priority_table new_app;
        struct i40e_dcbx_config *old_cfg;
        int ret;

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return -EINVAL;

        old_cfg = &pf->hw.local_dcbx_config;
        if (old_cfg->numapps == I40E_DCBX_MAX_APPS)
                return -EINVAL;

        ret = dcb_ieee_setapp(netdev, app);
        if (ret)
                return ret;

        new_app.selector = app->selector;
        new_app.protocolid = app->protocol;
        new_app.priority = app->priority;
        /* Already internally available */
        if (i40e_dcbnl_find_app(old_cfg, &new_app))
                return 0;

        /* Copy current config into temp */
        pf->tmp_cfg = *old_cfg;
        /* Add the app */
        pf->tmp_cfg.app[pf->tmp_cfg.numapps++] = new_app;

        ret = i40e_hw_dcb_config(pf, &pf->tmp_cfg);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Failed setting DCB configuration err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         libie_aq_str(pf->hw.aq.asq_last_status));
                return -EINVAL;
        }

        return 0;
}

/**
 * i40e_dcbnl_ieee_delapp - delete local IEEE App configuration
 * @netdev: the corresponding netdev
 * @app: structure to hold the Application information
 *
 * Deletes local IEEE App configuration other than the first application
 * required by firmware
 **/
static int i40e_dcbnl_ieee_delapp(struct net_device *netdev,
                                  struct dcb_app *app)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
        struct i40e_dcbx_config *old_cfg;
        int i, j, ret;

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return -EINVAL;

        ret = dcb_ieee_delapp(netdev, app);
        if (ret)
                return ret;

        old_cfg = &pf->hw.local_dcbx_config;
        /* Need one app for FW so keep it */
        if (old_cfg->numapps == 1)
                return 0;

        /* Copy current config into temp */
        pf->tmp_cfg = *old_cfg;

        /* Find and reset the app */
        for (i = 1; i < pf->tmp_cfg.numapps; i++) {
                if (app->selector == pf->tmp_cfg.app[i].selector &&
                    app->protocol == pf->tmp_cfg.app[i].protocolid &&
                    app->priority == pf->tmp_cfg.app[i].priority) {
                        /* Reset the app data */
                        pf->tmp_cfg.app[i].selector = 0;
                        pf->tmp_cfg.app[i].protocolid = 0;
                        pf->tmp_cfg.app[i].priority = 0;
                        break;
                }
        }

        /* If the specific DCB app not found */
        if (i == pf->tmp_cfg.numapps)
                return -EINVAL;

        pf->tmp_cfg.numapps--;
        /* Overwrite the tmp_cfg app */
        for (j = i; j < pf->tmp_cfg.numapps; j++)
                pf->tmp_cfg.app[j] = old_cfg->app[j + 1];

        ret = i40e_hw_dcb_config(pf, &pf->tmp_cfg);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Failed setting DCB configuration err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         libie_aq_str(pf->hw.aq.asq_last_status));
                return -EINVAL;
        }

        return 0;
}

/**
 * i40e_dcbnl_getstate - Get DCB enabled state
 * @netdev: the corresponding netdev
 *
 * Get the current DCB enabled state
 **/
static u8 i40e_dcbnl_getstate(struct net_device *netdev)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        dev_dbg(&pf->pdev->dev, "DCB state=%d\n",
                test_bit(I40E_FLAG_DCB_ENA, pf->flags) ? 1 : 0);
        return test_bit(I40E_FLAG_DCB_ENA, pf->flags) ? 1 : 0;
}

/**
 * i40e_dcbnl_setstate - Set DCB state
 * @netdev: the corresponding netdev
 * @state: enable or disable
 *
 * Set the DCB state
 **/
static u8 i40e_dcbnl_setstate(struct net_device *netdev, u8 state)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
        int ret = I40E_DCBNL_STATUS_SUCCESS;

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return ret;

        dev_dbg(&pf->pdev->dev, "new state=%d current state=%d\n",
                state, test_bit(I40E_FLAG_DCB_ENA, pf->flags) ? 1 : 0);
        /* Nothing to do */
        if (!state == !test_bit(I40E_FLAG_DCB_ENA, pf->flags))
                return ret;

        if (i40e_is_sw_dcb(pf)) {
                if (state) {
                        set_bit(I40E_FLAG_DCB_ENA, pf->flags);
                        memcpy(&pf->hw.desired_dcbx_config,
                               &pf->hw.local_dcbx_config,
                               sizeof(struct i40e_dcbx_config));
                } else {
                        clear_bit(I40E_FLAG_DCB_ENA, pf->flags);
                }
        } else {
                /* Cannot directly manipulate FW LLDP Agent */
                ret = I40E_DCBNL_STATUS_ERROR;
        }
        return ret;
}

/**
 * i40e_dcbnl_set_pg_tc_cfg_tx - Set CEE PG Tx config
 * @netdev: the corresponding netdev
 * @tc: the corresponding traffic class
 * @prio_type: the traffic priority type
 * @bwg_id: the BW group id the traffic class belongs to
 * @bw_pct: the BW percentage for the corresponding BWG
 * @up_map: prio mapped to corresponding tc
 *
 * Set Tx PG settings for CEE mode
 **/
static void i40e_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
                                        u8 prio_type, u8 bwg_id, u8 bw_pct,
                                        u8 up_map)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
        int i;

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return;

        /* LLTC not supported yet */
        if (tc >= I40E_MAX_TRAFFIC_CLASS)
                return;

        /* prio_type, bwg_id and bw_pct per UP are not supported */

        /* Use only up_map to map tc */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (up_map & BIT(i))
                        pf->tmp_cfg.etscfg.prioritytable[i] = tc;
        }
        pf->tmp_cfg.etscfg.tsatable[tc] = I40E_IEEE_TSA_ETS;
        dev_dbg(&pf->pdev->dev,
                "Set PG config tc=%d bwg_id=%d prio_type=%d bw_pct=%d up_map=%d\n",
                tc, bwg_id, prio_type, bw_pct, up_map);
}

/**
 * i40e_dcbnl_set_pg_bwg_cfg_tx - Set CEE PG Tx BW config
 * @netdev: the corresponding netdev
 * @pgid: the corresponding traffic class
 * @bw_pct: the BW percentage for the specified traffic class
 *
 * Set Tx BW settings for CEE mode
 **/
static void i40e_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int pgid,
                                         u8 bw_pct)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return;

        /* LLTC not supported yet */
        if (pgid >= I40E_MAX_TRAFFIC_CLASS)
                return;

        pf->tmp_cfg.etscfg.tcbwtable[pgid] = bw_pct;
        dev_dbg(&pf->pdev->dev, "Set PG BW config tc=%d bw_pct=%d\n",
                pgid, bw_pct);
}

/**
 * i40e_dcbnl_set_pg_tc_cfg_rx - Set CEE PG Rx config
 * @netdev: the corresponding netdev
 * @prio: the corresponding traffic class
 * @prio_type: the traffic priority type
 * @pgid: the BW group id the traffic class belongs to
 * @bw_pct: the BW percentage for the corresponding BWG
 * @up_map: prio mapped to corresponding tc
 *
 * Set Rx BW settings for CEE mode. The hardware does not support this
 * so we won't allow setting of this parameter.
 **/
static void i40e_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev,
                                        int __always_unused prio,
                                        u8 __always_unused prio_type,
                                        u8 __always_unused pgid,
                                        u8 __always_unused bw_pct,
                                        u8 __always_unused up_map)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        dev_dbg(&pf->pdev->dev, "Rx TC PG Config Not Supported.\n");
}

/**
 * i40e_dcbnl_set_pg_bwg_cfg_rx - Set CEE PG Rx config
 * @netdev: the corresponding netdev
 * @pgid: the corresponding traffic class
 * @bw_pct: the BW percentage for the specified traffic class
 *
 * Set Rx BW settings for CEE mode. The hardware does not support this
 * so we won't allow setting of this parameter.
 **/
static void i40e_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int pgid,
                                         u8 bw_pct)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        dev_dbg(&pf->pdev->dev, "Rx BWG PG Config Not Supported.\n");
}

/**
 * i40e_dcbnl_get_pg_tc_cfg_tx - Get CEE PG Tx config
 * @netdev: the corresponding netdev
 * @prio: the corresponding user priority
 * @prio_type: traffic priority type
 * @pgid: the BW group ID the traffic class belongs to
 * @bw_pct: BW percentage for the corresponding BWG
 * @up_map: prio mapped to corresponding TC
 *
 * Get Tx PG settings for CEE mode
 **/
static void i40e_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int prio,
                                        u8 __always_unused *prio_type,
                                        u8 *pgid,
                                        u8 __always_unused *bw_pct,
                                        u8 __always_unused *up_map)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return;

        if (prio >= I40E_MAX_USER_PRIORITY)
                return;

        *pgid = pf->hw.local_dcbx_config.etscfg.prioritytable[prio];
        dev_dbg(&pf->pdev->dev, "Get PG config prio=%d tc=%d\n",
                prio, *pgid);
}

/**
 * i40e_dcbnl_get_pg_bwg_cfg_tx - Get CEE PG BW config
 * @netdev: the corresponding netdev
 * @pgid: the corresponding traffic class
 * @bw_pct: the BW percentage for the corresponding TC
 *
 * Get Tx BW settings for given TC in CEE mode
 **/
static void i40e_dcbnl_get_pg_bwg_cfg_tx(struct net_device *netdev, int pgid,
                                         u8 *bw_pct)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return;

        if (pgid >= I40E_MAX_TRAFFIC_CLASS)
                return;

        *bw_pct = pf->hw.local_dcbx_config.etscfg.tcbwtable[pgid];
        dev_dbg(&pf->pdev->dev, "Get PG BW config tc=%d bw_pct=%d\n",
                pgid, *bw_pct);
}

/**
 * i40e_dcbnl_get_pg_tc_cfg_rx - Get CEE PG Rx config
 * @netdev: the corresponding netdev
 * @prio: the corresponding user priority
 * @prio_type: the traffic priority type
 * @pgid: the PG ID
 * @bw_pct: the BW percentage for the corresponding BWG
 * @up_map: prio mapped to corresponding TC
 *
 * Get Rx PG settings for CEE mode. The UP2TC map is applied in same
 * manner for Tx and Rx (symmetrical) so return the TC information for
 * given priority accordingly.
 **/
static void i40e_dcbnl_get_pg_tc_cfg_rx(struct net_device *netdev, int prio,
                                        u8 *prio_type, u8 *pgid, u8 *bw_pct,
                                        u8 *up_map)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return;

        if (prio >= I40E_MAX_USER_PRIORITY)
                return;

        *pgid = pf->hw.local_dcbx_config.etscfg.prioritytable[prio];
}

/**
 * i40e_dcbnl_get_pg_bwg_cfg_rx - Get CEE PG BW Rx config
 * @netdev: the corresponding netdev
 * @pgid: the corresponding traffic class
 * @bw_pct: the BW percentage for the corresponding TC
 *
 * Get Rx BW settings for given TC in CEE mode
 * The adapter doesn't support Rx ETS and runs in strict priority
 * mode in Rx path and hence just return 0.
 **/
static void i40e_dcbnl_get_pg_bwg_cfg_rx(struct net_device *netdev, int pgid,
                                         u8 *bw_pct)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return;
        *bw_pct = 0;
}

/**
 * i40e_dcbnl_set_pfc_cfg - Set CEE PFC configuration
 * @netdev: the corresponding netdev
 * @prio: the corresponding user priority
 * @setting: the PFC setting for given priority
 *
 * Set the PFC enabled/disabled setting for given user priority
 **/
static void i40e_dcbnl_set_pfc_cfg(struct net_device *netdev, int prio,
                                   u8 setting)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return;

        if (prio >= I40E_MAX_USER_PRIORITY)
                return;

        pf->tmp_cfg.pfc.pfccap = I40E_MAX_TRAFFIC_CLASS;
        if (setting)
                pf->tmp_cfg.pfc.pfcenable |= BIT(prio);
        else
                pf->tmp_cfg.pfc.pfcenable &= ~BIT(prio);
        dev_dbg(&pf->pdev->dev,
                "Set PFC Config up=%d setting=%d pfcenable=0x%x\n",
                prio, setting, pf->tmp_cfg.pfc.pfcenable);
}

/**
 * i40e_dcbnl_get_pfc_cfg - Get CEE PFC configuration
 * @netdev: the corresponding netdev
 * @prio: the corresponding user priority
 * @setting: the PFC setting for given priority
 *
 * Get the PFC enabled/disabled setting for given user priority
 **/
static void i40e_dcbnl_get_pfc_cfg(struct net_device *netdev, int prio,
                                   u8 *setting)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return;

        if (prio >= I40E_MAX_USER_PRIORITY)
                return;

        *setting = (pf->hw.local_dcbx_config.pfc.pfcenable >> prio) & 0x1;
        dev_dbg(&pf->pdev->dev,
                "Get PFC Config up=%d setting=%d pfcenable=0x%x\n",
                prio, *setting, pf->hw.local_dcbx_config.pfc.pfcenable);
}

/**
 * i40e_dcbnl_cee_set_all - Commit CEE DCB settings to hardware
 * @netdev: the corresponding netdev
 *
 * Commit the current DCB configuration to hardware
 **/
static u8 i40e_dcbnl_cee_set_all(struct net_device *netdev)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
        int err;

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return I40E_DCBNL_STATUS_ERROR;

        dev_dbg(&pf->pdev->dev, "Commit DCB Configuration to the hardware\n");
        err = i40e_hw_dcb_config(pf, &pf->tmp_cfg);

        return err ? I40E_DCBNL_STATUS_ERROR : I40E_DCBNL_STATUS_SUCCESS;
}

/**
 * i40e_dcbnl_get_cap - Get DCBX capabilities of adapter
 * @netdev: the corresponding netdev
 * @capid: the capability type
 * @cap: the capability value
 *
 * Return the capability value for a given capability type
 **/
static u8 i40e_dcbnl_get_cap(struct net_device *netdev, int capid, u8 *cap)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        if (!test_bit(I40E_FLAG_DCB_CAPABLE, pf->flags))
                return I40E_DCBNL_STATUS_ERROR;

        switch (capid) {
        case DCB_CAP_ATTR_PG:
        case DCB_CAP_ATTR_PFC:
                *cap = true;
                break;
        case DCB_CAP_ATTR_PG_TCS:
        case DCB_CAP_ATTR_PFC_TCS:
                *cap = 0x80;
                break;
        case DCB_CAP_ATTR_DCBX:
                *cap = pf->dcbx_cap;
                break;
        case DCB_CAP_ATTR_UP2TC:
        case DCB_CAP_ATTR_GSP:
        case DCB_CAP_ATTR_BCN:
        default:
                *cap = false;
                break;
        }

        dev_dbg(&pf->pdev->dev, "Get Capability cap=%d capval=0x%x\n",
                capid, *cap);
        return I40E_DCBNL_STATUS_SUCCESS;
}

/**
 * i40e_dcbnl_getnumtcs - Get max number of traffic classes supported
 * @netdev: the corresponding netdev
 * @tcid: the TC id
 * @num: total number of TCs supported by the device
 *
 * Return the total number of TCs supported by the adapter
 **/
static int i40e_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        if (!test_bit(I40E_FLAG_DCB_CAPABLE, pf->flags))
                return -EINVAL;

        *num = I40E_MAX_TRAFFIC_CLASS;
        return 0;
}

/**
 * i40e_dcbnl_setnumtcs - Set CEE number of traffic classes
 * @netdev: the corresponding netdev
 * @tcid: the TC id
 * @num: total number of TCs
 *
 * Set the total number of TCs (Unsupported)
 **/
static int i40e_dcbnl_setnumtcs(struct net_device *netdev, int tcid, u8 num)
{
        return -EINVAL;
}

/**
 * i40e_dcbnl_getpfcstate - Get CEE PFC mode
 * @netdev: the corresponding netdev
 *
 * Get the current PFC enabled state
 **/
static u8 i40e_dcbnl_getpfcstate(struct net_device *netdev)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        /* Return enabled if any PFC enabled UP */
        if (pf->hw.local_dcbx_config.pfc.pfcenable)
                return 1;
        else
                return 0;
}

/**
 * i40e_dcbnl_setpfcstate - Set CEE PFC mode
 * @netdev: the corresponding netdev
 * @state: required state
 *
 * The PFC state to be set; this is enabled/disabled based on the PFC
 * priority settings and not via this call for i40e driver
 **/
static void i40e_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        dev_dbg(&pf->pdev->dev, "PFC State is modified via PFC config.\n");
}

/**
 * i40e_dcbnl_getapp - Get CEE APP
 * @netdev: the corresponding netdev
 * @idtype: the App selector
 * @id: the App ethtype or port number
 *
 * Return the CEE mode app for the given idtype and id
 **/
static int i40e_dcbnl_getapp(struct net_device *netdev, u8 idtype, u16 id)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
        struct dcb_app app = {
                                .selector = idtype,
                                .protocol = id,
                             };

        if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
            (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
                return -EINVAL;

        return dcb_getapp(netdev, &app);
}

/**
 * i40e_dcbnl_setdcbx - set required DCBx capability
 * @netdev: the corresponding netdev
 * @mode: new DCB mode managed or CEE+IEEE
 *
 * Set DCBx capability features
 **/
static u8 i40e_dcbnl_setdcbx(struct net_device *netdev, u8 mode)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(netdev);

        /* Do not allow to set mode if managed by Firmware */
        if (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED)
                return I40E_DCBNL_STATUS_ERROR;

        /* No support for LLD_MANAGED modes or CEE+IEEE */
        if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
            ((mode & DCB_CAP_DCBX_VER_IEEE) && (mode & DCB_CAP_DCBX_VER_CEE)) ||
            !(mode & DCB_CAP_DCBX_HOST))
                return I40E_DCBNL_STATUS_ERROR;

        /* Already set to the given mode no change */
        if (mode == pf->dcbx_cap)
                return I40E_DCBNL_STATUS_SUCCESS;

        pf->dcbx_cap = mode;
        if (mode & DCB_CAP_DCBX_VER_CEE)
                pf->hw.local_dcbx_config.dcbx_mode = I40E_DCBX_MODE_CEE;
        else
                pf->hw.local_dcbx_config.dcbx_mode = I40E_DCBX_MODE_IEEE;

        dev_dbg(&pf->pdev->dev, "mode=%d\n", mode);
        return I40E_DCBNL_STATUS_SUCCESS;
}

/**
 * i40e_dcbnl_getdcbx - retrieve current DCBx capability
 * @dev: the corresponding netdev
 *
 * Returns DCBx capability features
 **/
static u8 i40e_dcbnl_getdcbx(struct net_device *dev)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(dev);

        return pf->dcbx_cap;
}

/**
 * i40e_dcbnl_get_perm_hw_addr - MAC address used by DCBx
 * @dev: the corresponding netdev
 * @perm_addr: buffer to store the MAC address
 *
 * Returns the SAN MAC address used for LLDP exchange
 **/
static void i40e_dcbnl_get_perm_hw_addr(struct net_device *dev,
                                        u8 *perm_addr)
{
        struct i40e_pf *pf = i40e_netdev_to_pf(dev);
        int i;

        memset(perm_addr, 0xff, MAX_ADDR_LEN);

        for (i = 0; i < dev->addr_len; i++)
                perm_addr[i] = pf->hw.mac.perm_addr[i];
}

static const struct dcbnl_rtnl_ops dcbnl_ops = {
        .ieee_getets    = i40e_dcbnl_ieee_getets,
        .ieee_getpfc    = i40e_dcbnl_ieee_getpfc,
        .getdcbx        = i40e_dcbnl_getdcbx,
        .getpermhwaddr  = i40e_dcbnl_get_perm_hw_addr,
        .ieee_setets    = i40e_dcbnl_ieee_setets,
        .ieee_setpfc    = i40e_dcbnl_ieee_setpfc,
        .ieee_setapp    = i40e_dcbnl_ieee_setapp,
        .ieee_delapp    = i40e_dcbnl_ieee_delapp,
        .getstate       = i40e_dcbnl_getstate,
        .setstate       = i40e_dcbnl_setstate,
        .setpgtccfgtx   = i40e_dcbnl_set_pg_tc_cfg_tx,
        .setpgbwgcfgtx  = i40e_dcbnl_set_pg_bwg_cfg_tx,
        .setpgtccfgrx   = i40e_dcbnl_set_pg_tc_cfg_rx,
        .setpgbwgcfgrx  = i40e_dcbnl_set_pg_bwg_cfg_rx,
        .getpgtccfgtx   = i40e_dcbnl_get_pg_tc_cfg_tx,
        .getpgbwgcfgtx  = i40e_dcbnl_get_pg_bwg_cfg_tx,
        .getpgtccfgrx   = i40e_dcbnl_get_pg_tc_cfg_rx,
        .getpgbwgcfgrx  = i40e_dcbnl_get_pg_bwg_cfg_rx,
        .setpfccfg      = i40e_dcbnl_set_pfc_cfg,
        .getpfccfg      = i40e_dcbnl_get_pfc_cfg,
        .setall         = i40e_dcbnl_cee_set_all,
        .getcap         = i40e_dcbnl_get_cap,
        .getnumtcs      = i40e_dcbnl_getnumtcs,
        .setnumtcs      = i40e_dcbnl_setnumtcs,
        .getpfcstate    = i40e_dcbnl_getpfcstate,
        .setpfcstate    = i40e_dcbnl_setpfcstate,
        .getapp         = i40e_dcbnl_getapp,
        .setdcbx        = i40e_dcbnl_setdcbx,
};

/**
 * i40e_dcbnl_set_all - set all the apps and ieee data from DCBx config
 * @vsi: the corresponding vsi
 *
 * Set up all the IEEE APPs in the DCBNL App Table and generate event for
 * other settings
 **/
void i40e_dcbnl_set_all(struct i40e_vsi *vsi)
{
        struct net_device *dev = vsi->netdev;
        struct i40e_pf *pf = i40e_netdev_to_pf(dev);
        struct i40e_dcbx_config *dcbxcfg;
        struct i40e_hw *hw = &pf->hw;
        struct dcb_app sapp;
        u8 prio, tc_map;
        int i;

        /* SW DCB taken care by DCBNL set calls */
        if (pf->dcbx_cap & DCB_CAP_DCBX_HOST)
                return;

        /* DCB not enabled */
        if (!test_bit(I40E_FLAG_DCB_ENA, pf->flags))
                return;

        /* MFP mode but not an iSCSI PF so return */
        if (test_bit(I40E_FLAG_MFP_ENA, pf->flags) && !(hw->func_caps.iscsi))
                return;

        dcbxcfg = &hw->local_dcbx_config;

        /* Set up all the App TLVs if DCBx is negotiated */
        for (i = 0; i < dcbxcfg->numapps; i++) {
                prio = dcbxcfg->app[i].priority;
                tc_map = BIT(dcbxcfg->etscfg.prioritytable[prio]);

                /* Add APP only if the TC is enabled for this VSI */
                if (tc_map & vsi->tc_config.enabled_tc) {
                        sapp.selector = dcbxcfg->app[i].selector;
                        sapp.protocol = dcbxcfg->app[i].protocolid;
                        sapp.priority = prio;
                        dcb_ieee_setapp(dev, &sapp);
                }
        }

        /* Notify user-space of the changes */
        dcbnl_ieee_notify(dev, RTM_SETDCB, DCB_CMD_IEEE_SET, 0, 0);
}

/**
 * i40e_dcbnl_vsi_del_app - Delete APP for given VSI
 * @vsi: the corresponding vsi
 * @app: APP to delete
 *
 * Delete given APP from the DCBNL APP table for given
 * VSI
 **/
static int i40e_dcbnl_vsi_del_app(struct i40e_vsi *vsi,
                                  struct i40e_dcb_app_priority_table *app)
{
        struct net_device *dev = vsi->netdev;
        struct dcb_app sapp;

        if (!dev)
                return -EINVAL;

        sapp.selector = app->selector;
        sapp.protocol = app->protocolid;
        sapp.priority = app->priority;
        return dcb_ieee_delapp(dev, &sapp);
}

/**
 * i40e_dcbnl_del_app - Delete APP on all VSIs
 * @pf: the corresponding PF
 * @app: APP to delete
 *
 * Delete given APP from all the VSIs for given PF
 **/
static void i40e_dcbnl_del_app(struct i40e_pf *pf,
                               struct i40e_dcb_app_priority_table *app)
{
        struct i40e_vsi *vsi;
        int v, err;

        i40e_pf_for_each_vsi(pf, v, vsi)
                if (vsi->netdev) {
                        err = i40e_dcbnl_vsi_del_app(vsi, app);
                        dev_dbg(&pf->pdev->dev, "Deleting app for VSI seid=%d err=%d sel=%d proto=0x%x prio=%d\n",
                                vsi->seid, err, app->selector,
                                app->protocolid, app->priority);
                }
}

/**
 * i40e_dcbnl_find_app - Search APP in given DCB config
 * @cfg: DCBX configuration data
 * @app: APP to search for
 *
 * Find given APP in the DCB configuration
 **/
static bool i40e_dcbnl_find_app(struct i40e_dcbx_config *cfg,
                                struct i40e_dcb_app_priority_table *app)
{
        int i;

        for (i = 0; i < cfg->numapps; i++) {
                if (app->selector == cfg->app[i].selector &&
                    app->protocolid == cfg->app[i].protocolid &&
                    app->priority == cfg->app[i].priority)
                        return true;
        }

        return false;
}

/**
 * i40e_dcbnl_flush_apps - Delete all removed APPs
 * @pf: the corresponding PF
 * @old_cfg: old DCBX configuration data
 * @new_cfg: new DCBX configuration data
 *
 * Find and delete all APPs that are not present in the passed
 * DCB configuration
 **/
void i40e_dcbnl_flush_apps(struct i40e_pf *pf,
                           struct i40e_dcbx_config *old_cfg,
                           struct i40e_dcbx_config *new_cfg)
{
        struct i40e_dcb_app_priority_table app;
        int i;

        /* MFP mode but not an iSCSI PF so return */
        if (test_bit(I40E_FLAG_MFP_ENA, pf->flags) && !(pf->hw.func_caps.iscsi))
                return;

        for (i = 0; i < old_cfg->numapps; i++) {
                app = old_cfg->app[i];
                /* The APP is not available anymore delete it */
                if (!i40e_dcbnl_find_app(new_cfg, &app))
                        i40e_dcbnl_del_app(pf, &app);
        }
}

/**
 * i40e_dcbnl_setup - DCBNL setup
 * @vsi: the corresponding vsi
 *
 * Set up DCBNL ops and initial APP TLVs
 **/
void i40e_dcbnl_setup(struct i40e_vsi *vsi)
{
        struct net_device *dev = vsi->netdev;
        struct i40e_pf *pf = i40e_netdev_to_pf(dev);

        /* Not DCB capable */
        if (!test_bit(I40E_FLAG_DCB_CAPABLE, pf->flags))
                return;

        dev->dcbnl_ops = &dcbnl_ops;

        /* Set initial IEEE DCB settings */
        i40e_dcbnl_set_all(vsi);
}
#endif /* CONFIG_I40E_DCB */