// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2013 - 2018 Intel Corporation. */
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#ifdef CONFIG_I40E_DCB
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#include "i40e.h"
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#include <net/dcbnl.h>
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/**
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* i40e_get_pfc_delay - retrieve PFC Link Delay
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* @hw: pointer to hardware struct
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* @delay: holds the PFC Link delay value
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*
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* Returns PFC Link Delay from the PRTDCB_GENC.PFCLDA
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**/
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static void i40e_get_pfc_delay(struct i40e_hw *hw, u16 *delay)
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{
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u32 val;
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val = rd32(hw, I40E_PRTDCB_GENC);
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*delay = (u16)((val & I40E_PRTDCB_GENC_PFCLDA_MASK) >>
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I40E_PRTDCB_GENC_PFCLDA_SHIFT);
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}
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/**
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* i40e_dcbnl_ieee_getets - retrieve local IEEE ETS configuration
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* @dev: the corresponding netdev
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* @ets: structure to hold the ETS information
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*
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* Returns local IEEE ETS configuration
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**/
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static int i40e_dcbnl_ieee_getets(struct net_device *dev,
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struct ieee_ets *ets)
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{
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struct i40e_pf *pf = i40e_netdev_to_pf(dev);
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struct i40e_dcbx_config *dcbxcfg;
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struct i40e_hw *hw = &pf->hw;
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if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
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return -EINVAL;
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dcbxcfg = &hw->local_dcbx_config;
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ets->willing = dcbxcfg->etscfg.willing;
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ets->ets_cap = dcbxcfg->etscfg.maxtcs;
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ets->cbs = dcbxcfg->etscfg.cbs;
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memcpy(ets->tc_tx_bw, dcbxcfg->etscfg.tcbwtable,
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sizeof(ets->tc_tx_bw));
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memcpy(ets->tc_rx_bw, dcbxcfg->etscfg.tcbwtable,
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sizeof(ets->tc_rx_bw));
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memcpy(ets->tc_tsa, dcbxcfg->etscfg.tsatable,
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sizeof(ets->tc_tsa));
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memcpy(ets->prio_tc, dcbxcfg->etscfg.prioritytable,
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sizeof(ets->prio_tc));
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memcpy(ets->tc_reco_bw, dcbxcfg->etsrec.tcbwtable,
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sizeof(ets->tc_reco_bw));
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memcpy(ets->tc_reco_tsa, dcbxcfg->etsrec.tsatable,
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sizeof(ets->tc_reco_tsa));
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memcpy(ets->reco_prio_tc, dcbxcfg->etscfg.prioritytable,
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sizeof(ets->reco_prio_tc));
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return 0;
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}
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/**
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* i40e_dcbnl_ieee_getpfc - retrieve local IEEE PFC configuration
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* @dev: the corresponding netdev
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* @pfc: structure to hold the PFC information
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*
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* Returns local IEEE PFC configuration
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**/
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static int i40e_dcbnl_ieee_getpfc(struct net_device *dev,
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struct ieee_pfc *pfc)
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{
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struct i40e_pf *pf = i40e_netdev_to_pf(dev);
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struct i40e_dcbx_config *dcbxcfg;
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struct i40e_hw *hw = &pf->hw;
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int i;
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if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
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return -EINVAL;
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dcbxcfg = &hw->local_dcbx_config;
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pfc->pfc_cap = dcbxcfg->pfc.pfccap;
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pfc->pfc_en = dcbxcfg->pfc.pfcenable;
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pfc->mbc = dcbxcfg->pfc.mbc;
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i40e_get_pfc_delay(hw, &pfc->delay);
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/* Get Requests/Indicatiosn */
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for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
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pfc->requests[i] = pf->stats.priority_xoff_tx[i];
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pfc->indications[i] = pf->stats.priority_xoff_rx[i];
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}
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return 0;
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}
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/**
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* i40e_dcbnl_getdcbx - retrieve current DCBx capability
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* @dev: the corresponding netdev
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*
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* Returns DCBx capability features
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**/
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static u8 i40e_dcbnl_getdcbx(struct net_device *dev)
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{
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struct i40e_pf *pf = i40e_netdev_to_pf(dev);
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return pf->dcbx_cap;
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}
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/**
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* i40e_dcbnl_get_perm_hw_addr - MAC address used by DCBx
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* @dev: the corresponding netdev
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* @perm_addr: buffer to store the MAC address
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*
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* Returns the SAN MAC address used for LLDP exchange
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**/
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static void i40e_dcbnl_get_perm_hw_addr(struct net_device *dev,
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u8 *perm_addr)
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{
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struct i40e_pf *pf = i40e_netdev_to_pf(dev);
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int i, j;
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memset(perm_addr, 0xff, MAX_ADDR_LEN);
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for (i = 0; i < dev->addr_len; i++)
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perm_addr[i] = pf->hw.mac.perm_addr[i];
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for (j = 0; j < dev->addr_len; j++, i++)
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perm_addr[i] = pf->hw.mac.san_addr[j];
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}
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static const struct dcbnl_rtnl_ops dcbnl_ops = {
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.ieee_getets = i40e_dcbnl_ieee_getets,
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.ieee_getpfc = i40e_dcbnl_ieee_getpfc,
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.getdcbx = i40e_dcbnl_getdcbx,
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.getpermhwaddr = i40e_dcbnl_get_perm_hw_addr,
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};
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/**
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* i40e_dcbnl_set_all - set all the apps and ieee data from DCBx config
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* @vsi: the corresponding vsi
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*
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* Set up all the IEEE APPs in the DCBNL App Table and generate event for
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* other settings
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**/
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void i40e_dcbnl_set_all(struct i40e_vsi *vsi)
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{
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struct net_device *dev = vsi->netdev;
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struct i40e_pf *pf = i40e_netdev_to_pf(dev);
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struct i40e_dcbx_config *dcbxcfg;
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struct i40e_hw *hw = &pf->hw;
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struct dcb_app sapp;
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u8 prio, tc_map;
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int i;
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/* DCB not enabled */
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if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
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return;
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/* MFP mode but not an iSCSI PF so return */
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if ((pf->flags & I40E_FLAG_MFP_ENABLED) && !(pf->hw.func_caps.iscsi))
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return;
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dcbxcfg = &hw->local_dcbx_config;
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/* Set up all the App TLVs if DCBx is negotiated */
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for (i = 0; i < dcbxcfg->numapps; i++) {
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prio = dcbxcfg->app[i].priority;
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tc_map = BIT(dcbxcfg->etscfg.prioritytable[prio]);
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/* Add APP only if the TC is enabled for this VSI */
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if (tc_map & vsi->tc_config.enabled_tc) {
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sapp.selector = dcbxcfg->app[i].selector;
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sapp.protocol = dcbxcfg->app[i].protocolid;
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sapp.priority = prio;
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dcb_ieee_setapp(dev, &sapp);
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}
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}
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/* Notify user-space of the changes */
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dcbnl_ieee_notify(dev, RTM_SETDCB, DCB_CMD_IEEE_SET, 0, 0);
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}
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/**
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* i40e_dcbnl_vsi_del_app - Delete APP for given VSI
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* @vsi: the corresponding vsi
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* @app: APP to delete
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*
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* Delete given APP from the DCBNL APP table for given
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* VSI
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**/
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static int i40e_dcbnl_vsi_del_app(struct i40e_vsi *vsi,
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struct i40e_dcb_app_priority_table *app)
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{
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struct net_device *dev = vsi->netdev;
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struct dcb_app sapp;
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if (!dev)
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return -EINVAL;
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sapp.selector = app->selector;
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sapp.protocol = app->protocolid;
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sapp.priority = app->priority;
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return dcb_ieee_delapp(dev, &sapp);
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}
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/**
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* i40e_dcbnl_del_app - Delete APP on all VSIs
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* @pf: the corresponding PF
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* @app: APP to delete
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*
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* Delete given APP from all the VSIs for given PF
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**/
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static void i40e_dcbnl_del_app(struct i40e_pf *pf,
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struct i40e_dcb_app_priority_table *app)
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{
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int v, err;
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for (v = 0; v < pf->num_alloc_vsi; v++) {
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if (pf->vsi[v] && pf->vsi[v]->netdev) {
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err = i40e_dcbnl_vsi_del_app(pf->vsi[v], app);
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dev_dbg(&pf->pdev->dev, "Deleting app for VSI seid=%d err=%d sel=%d proto=0x%x prio=%d\n",
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pf->vsi[v]->seid, err, app->selector,
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app->protocolid, app->priority);
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}
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}
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}
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/**
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* i40e_dcbnl_find_app - Search APP in given DCB config
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* @cfg: DCBX configuration data
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* @app: APP to search for
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*
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* Find given APP in the DCB configuration
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**/
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static bool i40e_dcbnl_find_app(struct i40e_dcbx_config *cfg,
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struct i40e_dcb_app_priority_table *app)
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{
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int i;
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for (i = 0; i < cfg->numapps; i++) {
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if (app->selector == cfg->app[i].selector &&
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app->protocolid == cfg->app[i].protocolid &&
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app->priority == cfg->app[i].priority)
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return true;
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}
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return false;
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}
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/**
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* i40e_dcbnl_flush_apps - Delete all removed APPs
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* @pf: the corresponding PF
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* @old_cfg: old DCBX configuration data
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* @new_cfg: new DCBX configuration data
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*
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* Find and delete all APPs that are not present in the passed
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* DCB configuration
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**/
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void i40e_dcbnl_flush_apps(struct i40e_pf *pf,
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struct i40e_dcbx_config *old_cfg,
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struct i40e_dcbx_config *new_cfg)
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{
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struct i40e_dcb_app_priority_table app;
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int i;
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/* MFP mode but not an iSCSI PF so return */
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if ((pf->flags & I40E_FLAG_MFP_ENABLED) && !(pf->hw.func_caps.iscsi))
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return;
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for (i = 0; i < old_cfg->numapps; i++) {
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app = old_cfg->app[i];
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/* The APP is not available anymore delete it */
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if (!i40e_dcbnl_find_app(new_cfg, &app))
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i40e_dcbnl_del_app(pf, &app);
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}
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}
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/**
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* i40e_dcbnl_setup - DCBNL setup
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* @vsi: the corresponding vsi
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*
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* Set up DCBNL ops and initial APP TLVs
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**/
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void i40e_dcbnl_setup(struct i40e_vsi *vsi)
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{
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struct net_device *dev = vsi->netdev;
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struct i40e_pf *pf = i40e_netdev_to_pf(dev);
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/* Not DCB capable */
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if (!(pf->flags & I40E_FLAG_DCB_CAPABLE))
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return;
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dev->dcbnl_ops = &dcbnl_ops;
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/* Set initial IEEE DCB settings */
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i40e_dcbnl_set_all(vsi);
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}
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#endif /* CONFIG_I40E_DCB */
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