diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_dcb_nl.c')
-rw-r--r-- | drivers/net/ethernet/intel/ice/ice_dcb_nl.c | 192 |
1 files changed, 154 insertions, 38 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_dcb_nl.c b/drivers/net/ethernet/intel/ice/ice_dcb_nl.c index 4180f1f35fb8..7fdeb411b6df 100644 --- a/drivers/net/ethernet/intel/ice/ice_dcb_nl.c +++ b/drivers/net/ethernet/intel/ice/ice_dcb_nl.c @@ -64,7 +64,7 @@ static int ice_dcbnl_setets(struct net_device *netdev, struct ieee_ets *ets) struct ice_pf *pf = ice_netdev_to_pf(netdev); struct ice_dcbx_cfg *new_cfg; int bwcfg = 0, bwrec = 0; - int err, i, max_tc = 0; + int err, i; if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) || !(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)) @@ -80,13 +80,14 @@ static int ice_dcbnl_setets(struct net_device *netdev, struct ieee_ets *ets) new_cfg->etscfg.tcbwtable[i] = ets->tc_tx_bw[i]; bwcfg += ets->tc_tx_bw[i]; new_cfg->etscfg.tsatable[i] = ets->tc_tsa[i]; - new_cfg->etscfg.prio_table[i] = ets->prio_tc[i]; - if (ets->prio_tc[i] > max_tc) - max_tc = ets->prio_tc[i]; + if (new_cfg->pfc_mode == ICE_QOS_MODE_VLAN) { + /* in DSCP mode up->tc mapping cannot change */ + new_cfg->etscfg.prio_table[i] = ets->prio_tc[i]; + new_cfg->etsrec.prio_table[i] = ets->reco_prio_tc[i]; + } new_cfg->etsrec.tcbwtable[i] = ets->tc_reco_bw[i]; bwrec += ets->tc_reco_bw[i]; new_cfg->etsrec.tsatable[i] = ets->tc_reco_tsa[i]; - new_cfg->etsrec.prio_table[i] = ets->reco_prio_tc[i]; } if (ice_dcb_bwchk(pf, new_cfg)) { @@ -94,12 +95,7 @@ static int ice_dcbnl_setets(struct net_device *netdev, struct ieee_ets *ets) goto ets_out; } - max_tc = pf->hw.func_caps.common_cap.maxtc; - - new_cfg->etscfg.maxtcs = max_tc; - - if (!bwcfg) - new_cfg->etscfg.tcbwtable[0] = 100; + new_cfg->etscfg.maxtcs = pf->hw.func_caps.common_cap.maxtc; if (!bwrec) new_cfg->etsrec.tcbwtable[0] = 100; @@ -173,10 +169,13 @@ static u8 ice_dcbnl_setdcbx(struct net_device *netdev, u8 mode) pf->dcbx_cap = mode; qos_cfg = &pf->hw.port_info->qos_cfg; - if (mode & DCB_CAP_DCBX_VER_CEE) + if (mode & DCB_CAP_DCBX_VER_CEE) { + if (qos_cfg->local_dcbx_cfg.pfc_mode == ICE_QOS_MODE_DSCP) + return ICE_DCB_NO_HW_CHG; qos_cfg->local_dcbx_cfg.dcbx_mode = ICE_DCBX_MODE_CEE; - else + } else { qos_cfg->local_dcbx_cfg.dcbx_mode = ICE_DCBX_MODE_IEEE; + } dev_info(ice_pf_to_dev(pf), "DCBx mode = 0x%x\n", mode); return ICE_DCB_HW_CHG_RST; @@ -683,6 +682,8 @@ ice_dcbnl_find_app(struct ice_dcbx_cfg *cfg, return false; } +#define ICE_BYTES_PER_DSCP_VAL 8 + /** * ice_dcbnl_setapp - set local IEEE App config * @netdev: relevant netdev struct @@ -693,42 +694,117 @@ static int ice_dcbnl_setapp(struct net_device *netdev, struct dcb_app *app) struct ice_pf *pf = ice_netdev_to_pf(netdev); struct ice_dcb_app_priority_table new_app; struct ice_dcbx_cfg *old_cfg, *new_cfg; + u8 max_tc; int ret; - if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) || - !(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)) + /* ONLY DSCP APP TLVs have operational significance */ + if (app->selector != IEEE_8021QAZ_APP_SEL_DSCP) return -EINVAL; - mutex_lock(&pf->tc_mutex); + /* only allow APP TLVs in SW Mode */ + if (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) { + netdev_err(netdev, "can't do DSCP QoS when FW DCB agent active\n"); + return -EINVAL; + } - new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg; + if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)) + return -EINVAL; - old_cfg = &pf->hw.port_info->qos_cfg.local_dcbx_cfg; + if (!ice_is_feature_supported(pf, ICE_F_DSCP)) + return -EOPNOTSUPP; - if (old_cfg->numapps == ICE_DCBX_MAX_APPS) { - ret = -EINVAL; - goto setapp_out; + if (app->protocol >= ICE_DSCP_NUM_VAL) { + netdev_err(netdev, "DSCP value 0x%04X out of range\n", + app->protocol); + return -EINVAL; + } + + max_tc = pf->hw.func_caps.common_cap.maxtc; + if (app->priority >= max_tc) { + netdev_err(netdev, "TC %d out of range, max TC %d\n", + app->priority, max_tc); + return -EINVAL; } + /* grab TC mutex */ + mutex_lock(&pf->tc_mutex); + + new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg; + old_cfg = &pf->hw.port_info->qos_cfg.local_dcbx_cfg; + ret = dcb_ieee_setapp(netdev, app); if (ret) goto setapp_out; + if (test_and_set_bit(app->protocol, new_cfg->dscp_mapped)) { + netdev_err(netdev, "DSCP value 0x%04X already user mapped\n", + app->protocol); + ret = dcb_ieee_delapp(netdev, app); + if (ret) + netdev_err(netdev, "Failed to delete re-mapping TLV\n"); + ret = -EINVAL; + goto setapp_out; + } + new_app.selector = app->selector; new_app.prot_id = app->protocol; new_app.priority = app->priority; - if (ice_dcbnl_find_app(old_cfg, &new_app)) { - ret = 0; - goto setapp_out; - } + /* If port is not in DSCP mode, need to set */ + if (old_cfg->pfc_mode == ICE_QOS_MODE_VLAN) { + int i, j; + + /* set DSCP mode */ + ret = ice_aq_set_pfc_mode(&pf->hw, ICE_AQC_PFC_DSCP_BASED_PFC, + NULL); + if (ret) { + netdev_err(netdev, "Failed to set DSCP PFC mode %d\n", + ret); + goto setapp_out; + } + netdev_info(netdev, "Switched QoS to L3 DSCP mode\n"); + + new_cfg->pfc_mode = ICE_QOS_MODE_DSCP; + + /* set default DSCP QoS values */ + new_cfg->etscfg.willing = 0; + new_cfg->pfc.pfccap = max_tc; + new_cfg->pfc.willing = 0; + + for (i = 0; i < max_tc; i++) + for (j = 0; j < ICE_BYTES_PER_DSCP_VAL; j++) { + int dscp, offset; + + dscp = (i * max_tc) + j; + offset = max_tc * ICE_BYTES_PER_DSCP_VAL; + + new_cfg->dscp_map[dscp] = i; + /* if less that 8 TCs supported */ + if (max_tc < ICE_MAX_TRAFFIC_CLASS) + new_cfg->dscp_map[dscp + offset] = i; + } + + new_cfg->etscfg.tcbwtable[0] = 100; + new_cfg->etscfg.tsatable[0] = ICE_IEEE_TSA_ETS; + new_cfg->etscfg.prio_table[0] = 0; + + for (i = 1; i < max_tc; i++) { + new_cfg->etscfg.tcbwtable[i] = 0; + new_cfg->etscfg.tsatable[i] = ICE_IEEE_TSA_ETS; + new_cfg->etscfg.prio_table[i] = i; + } + } /* end of switching to DSCP mode */ + + /* apply new mapping for this DSCP value */ + new_cfg->dscp_map[app->protocol] = app->priority; new_cfg->app[new_cfg->numapps++] = new_app; + ret = ice_pf_dcb_cfg(pf, new_cfg, true); /* return of zero indicates new cfg applied */ if (ret == ICE_DCB_HW_CHG_RST) ice_dcbnl_devreset(netdev); - if (ret == ICE_DCB_NO_HW_CHG) - ret = ICE_DCB_HW_CHG_RST; + else + ret = ICE_DCB_NO_HW_CHG; setapp_out: mutex_unlock(&pf->tc_mutex); @@ -749,22 +825,21 @@ static int ice_dcbnl_delapp(struct net_device *netdev, struct dcb_app *app) unsigned int i, j; int ret = 0; - if (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) + if (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) { + netdev_err(netdev, "can't delete DSCP netlink app when FW DCB agent is active\n"); return -EINVAL; + } mutex_lock(&pf->tc_mutex); old_cfg = &pf->hw.port_info->qos_cfg.local_dcbx_cfg; - if (old_cfg->numapps <= 1) - goto delapp_out; - ret = dcb_ieee_delapp(netdev, app); if (ret) goto delapp_out; new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg; - for (i = 1; i < new_cfg->numapps; i++) { + for (i = 0; i < new_cfg->numapps; i++) { if (app->selector == new_cfg->app[i].selector && app->protocol == new_cfg->app[i].prot_id && app->priority == new_cfg->app[i].priority) { @@ -784,17 +859,58 @@ static int ice_dcbnl_delapp(struct net_device *netdev, struct dcb_app *app) new_cfg->numapps--; for (j = i; j < new_cfg->numapps; j++) { - new_cfg->app[i].selector = old_cfg->app[j + 1].selector; - new_cfg->app[i].prot_id = old_cfg->app[j + 1].prot_id; - new_cfg->app[i].priority = old_cfg->app[j + 1].priority; + new_cfg->app[j].selector = old_cfg->app[j + 1].selector; + new_cfg->app[j].prot_id = old_cfg->app[j + 1].prot_id; + new_cfg->app[j].priority = old_cfg->app[j + 1].priority; } - ret = ice_pf_dcb_cfg(pf, new_cfg, true); - /* return of zero indicates new cfg applied */ + /* if not a DSCP APP TLV or DSCP is not supported, we are done */ + if (app->selector != IEEE_8021QAZ_APP_SEL_DSCP || + !ice_is_feature_supported(pf, ICE_F_DSCP)) { + ret = ICE_DCB_HW_CHG; + goto delapp_out; + } + + /* if DSCP TLV, then need to address change in mapping */ + clear_bit(app->protocol, new_cfg->dscp_mapped); + /* remap this DSCP value to default value */ + new_cfg->dscp_map[app->protocol] = app->protocol % + ICE_BYTES_PER_DSCP_VAL; + + /* if the last DSCP mapping just got deleted, need to switch + * to L2 VLAN QoS mode + */ + if (bitmap_empty(new_cfg->dscp_mapped, ICE_DSCP_NUM_VAL) && + new_cfg->pfc_mode == ICE_QOS_MODE_DSCP) { + ret = ice_aq_set_pfc_mode(&pf->hw, + ICE_AQC_PFC_VLAN_BASED_PFC, + NULL); + if (ret) { + netdev_info(netdev, "Failed to set VLAN PFC mode %d\n", + ret); + goto delapp_out; + } + netdev_info(netdev, "Switched QoS to L2 VLAN mode\n"); + + new_cfg->pfc_mode = ICE_QOS_MODE_VLAN; + + ret = ice_dcb_sw_dflt_cfg(pf, true, true); + } else { + ret = ice_pf_dcb_cfg(pf, new_cfg, true); + } + + /* return of ICE_DCB_HW_CHG_RST indicates new cfg applied + * and reset needs to be performed + */ if (ret == ICE_DCB_HW_CHG_RST) ice_dcbnl_devreset(netdev); + + /* if the change was not siginificant enough to actually call + * the reconfiguration flow, we still need to tell caller that + * their request was successfully handled + */ if (ret == ICE_DCB_NO_HW_CHG) - ret = ICE_DCB_HW_CHG_RST; + ret = ICE_DCB_HW_CHG; delapp_out: mutex_unlock(&pf->tc_mutex); |