drivers/net/ethernet/intel/i40e/i40e_dcb_nl.c

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

#ifdef CONFIG_I40E_DCB
#include "i40e.h"
#include <net/dcbnl.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 = (u16)((val & I40E_PRTDCB_GENC_PFCLDA_MASK) >>
		       I40E_PRTDCB_GENC_PFCLDA_SHIFT);
}

/**
 * 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 %s aq_err %s\n",
			 i40e_stat_str(&pf->hw, ret),
			 i40e_aq_str(&pf->hw, 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 %s aq_err %s\n",
			 i40e_stat_str(&pf->hw, ret),
			 i40e_aq_str(&pf->hw, 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 %s aq_err %s\n",
			 i40e_stat_str(&pf->hw, ret),
			 i40e_aq_str(&pf->hw, 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 %s aq_err %s\n",
			 i40e_stat_str(&pf->hw, ret),
			 i40e_aq_str(&pf->hw, 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",
		!!(pf->flags & I40E_FLAG_DCB_ENABLED));
	return !!(pf->flags & I40E_FLAG_DCB_ENABLED);
}

/**
 * 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, (pf->flags & I40E_FLAG_DCB_ENABLED) ? 1 : 0);
	/* Nothing to do */
	if (!state == !(pf->flags & I40E_FLAG_DCB_ENABLED))
		return ret;

	if (i40e_is_sw_dcb(pf)) {
		if (state) {
			pf->flags |= I40E_FLAG_DCB_ENABLED;
			memcpy(&pf->hw.desired_dcbx_config,
			       &pf->hw.local_dcbx_config,
			       sizeof(struct i40e_dcbx_config));
		} else {
			pf->flags &= ~I40E_FLAG_DCB_ENABLED;
		}
	} 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 (!(pf->flags & I40E_FLAG_DCB_CAPABLE))
		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 (!(pf->flags & I40E_FLAG_DCB_CAPABLE))
		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, j;

	memset(perm_addr, 0xff, MAX_ADDR_LEN);

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

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

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 (!(pf->flags & I40E_FLAG_DCB_ENABLED))
		return;

	/* MFP mode but not an iSCSI PF so return */
	if ((pf->flags & I40E_FLAG_MFP_ENABLED) && !(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)
{
	int v, err;

	for (v = 0; v < pf->num_alloc_vsi; v++) {
		if (pf->vsi[v] && pf->vsi[v]->netdev) {
			err = i40e_dcbnl_vsi_del_app(pf->vsi[v], app);
			dev_dbg(&pf->pdev->dev, "Deleting app for VSI seid=%d err=%d sel=%d proto=0x%x prio=%d\n",
				pf->vsi[v]->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 ((pf->flags & I40E_FLAG_MFP_ENABLED) && !(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 (!(pf->flags & I40E_FLAG_DCB_CAPABLE))
		return;

	dev->dcbnl_ops = &dcbnl_ops;

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