ixgbe: driver fix for link flap
Fix up code so that changes in DCB settings are detected only when ixgbe_dcbnl_set_all is called. Previously, a series of 'change' commands followed by a call to ixgbe_dcbnl_set_all() would always be handled as a HW change - even if the net change was zero. This patch checks for this case of no actual change and skips going through the HW set process. Without this fix, the link could reset and result in a link flap. The core change in this patch is to check for changes in the ixgbe_copy_dcb_cfg() routine - and return a bitmask of detected changes. The other places where changes were detected previously can be removed. Signed-off-by: Eric Multanen <eric.w.multanen@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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01627d968c
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@ -44,62 +44,94 @@
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#define DCB_NO_HW_CHG 1 /* DCB configuration did not change */
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#define DCB_HW_CHG 2 /* DCB configuration changed, no reset */
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int ixgbe_copy_dcb_cfg(struct ixgbe_dcb_config *src_dcb_cfg,
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struct ixgbe_dcb_config *dst_dcb_cfg, int tc_max)
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int ixgbe_copy_dcb_cfg(struct ixgbe_dcb_config *scfg,
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struct ixgbe_dcb_config *dcfg, int tc_max)
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{
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struct tc_configuration *src_tc_cfg = NULL;
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struct tc_configuration *dst_tc_cfg = NULL;
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int i;
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struct tc_configuration *src = NULL;
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struct tc_configuration *dst = NULL;
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int i, j;
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int tx = DCB_TX_CONFIG;
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int rx = DCB_RX_CONFIG;
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int changes = 0;
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if (!src_dcb_cfg || !dst_dcb_cfg)
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return -EINVAL;
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if (!scfg || !dcfg)
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return changes;
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for (i = DCB_PG_ATTR_TC_0; i < tc_max + DCB_PG_ATTR_TC_0; i++) {
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src_tc_cfg = &src_dcb_cfg->tc_config[i - DCB_PG_ATTR_TC_0];
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dst_tc_cfg = &dst_dcb_cfg->tc_config[i - DCB_PG_ATTR_TC_0];
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src = &scfg->tc_config[i - DCB_PG_ATTR_TC_0];
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dst = &dcfg->tc_config[i - DCB_PG_ATTR_TC_0];
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dst_tc_cfg->path[DCB_TX_CONFIG].prio_type =
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src_tc_cfg->path[DCB_TX_CONFIG].prio_type;
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if (dst->path[tx].prio_type != src->path[tx].prio_type) {
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dst->path[tx].prio_type = src->path[tx].prio_type;
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changes |= BIT_PG_TX;
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}
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dst_tc_cfg->path[DCB_TX_CONFIG].bwg_id =
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src_tc_cfg->path[DCB_TX_CONFIG].bwg_id;
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if (dst->path[tx].bwg_id != src->path[tx].bwg_id) {
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dst->path[tx].bwg_id = src->path[tx].bwg_id;
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changes |= BIT_PG_TX;
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}
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dst_tc_cfg->path[DCB_TX_CONFIG].bwg_percent =
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src_tc_cfg->path[DCB_TX_CONFIG].bwg_percent;
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if (dst->path[tx].bwg_percent != src->path[tx].bwg_percent) {
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dst->path[tx].bwg_percent = src->path[tx].bwg_percent;
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changes |= BIT_PG_TX;
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}
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dst_tc_cfg->path[DCB_TX_CONFIG].up_to_tc_bitmap =
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src_tc_cfg->path[DCB_TX_CONFIG].up_to_tc_bitmap;
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if (dst->path[tx].up_to_tc_bitmap !=
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src->path[tx].up_to_tc_bitmap) {
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dst->path[tx].up_to_tc_bitmap =
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src->path[tx].up_to_tc_bitmap;
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changes |= (BIT_PG_TX | BIT_PFC | BIT_APP_UPCHG);
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}
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dst_tc_cfg->path[DCB_RX_CONFIG].prio_type =
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src_tc_cfg->path[DCB_RX_CONFIG].prio_type;
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if (dst->path[rx].prio_type != src->path[rx].prio_type) {
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dst->path[rx].prio_type = src->path[rx].prio_type;
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changes |= BIT_PG_RX;
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}
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dst_tc_cfg->path[DCB_RX_CONFIG].bwg_id =
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src_tc_cfg->path[DCB_RX_CONFIG].bwg_id;
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if (dst->path[rx].bwg_id != src->path[rx].bwg_id) {
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dst->path[rx].bwg_id = src->path[rx].bwg_id;
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changes |= BIT_PG_RX;
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}
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dst_tc_cfg->path[DCB_RX_CONFIG].bwg_percent =
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src_tc_cfg->path[DCB_RX_CONFIG].bwg_percent;
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if (dst->path[rx].bwg_percent != src->path[rx].bwg_percent) {
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dst->path[rx].bwg_percent = src->path[rx].bwg_percent;
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changes |= BIT_PG_RX;
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}
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dst_tc_cfg->path[DCB_RX_CONFIG].up_to_tc_bitmap =
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src_tc_cfg->path[DCB_RX_CONFIG].up_to_tc_bitmap;
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if (dst->path[rx].up_to_tc_bitmap !=
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src->path[rx].up_to_tc_bitmap) {
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dst->path[rx].up_to_tc_bitmap =
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src->path[rx].up_to_tc_bitmap;
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changes |= (BIT_PG_RX | BIT_PFC | BIT_APP_UPCHG);
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}
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}
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for (i = DCB_PG_ATTR_BW_ID_0; i < DCB_PG_ATTR_BW_ID_MAX; i++) {
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dst_dcb_cfg->bw_percentage[DCB_TX_CONFIG]
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[i-DCB_PG_ATTR_BW_ID_0] = src_dcb_cfg->bw_percentage
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[DCB_TX_CONFIG][i-DCB_PG_ATTR_BW_ID_0];
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dst_dcb_cfg->bw_percentage[DCB_RX_CONFIG]
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[i-DCB_PG_ATTR_BW_ID_0] = src_dcb_cfg->bw_percentage
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[DCB_RX_CONFIG][i-DCB_PG_ATTR_BW_ID_0];
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j = i - DCB_PG_ATTR_BW_ID_0;
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if (dcfg->bw_percentage[tx][j] != scfg->bw_percentage[tx][j]) {
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dcfg->bw_percentage[tx][j] = scfg->bw_percentage[tx][j];
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changes |= BIT_PG_TX;
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}
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if (dcfg->bw_percentage[rx][j] != scfg->bw_percentage[rx][j]) {
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dcfg->bw_percentage[rx][j] = scfg->bw_percentage[rx][j];
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changes |= BIT_PG_RX;
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}
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}
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for (i = DCB_PFC_UP_ATTR_0; i < DCB_PFC_UP_ATTR_MAX; i++) {
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dst_dcb_cfg->tc_config[i - DCB_PFC_UP_ATTR_0].dcb_pfc =
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src_dcb_cfg->tc_config[i - DCB_PFC_UP_ATTR_0].dcb_pfc;
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j = i - DCB_PFC_UP_ATTR_0;
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if (dcfg->tc_config[j].dcb_pfc != scfg->tc_config[j].dcb_pfc) {
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dcfg->tc_config[j].dcb_pfc = scfg->tc_config[j].dcb_pfc;
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changes |= BIT_PFC;
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}
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}
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dst_dcb_cfg->pfc_mode_enable = src_dcb_cfg->pfc_mode_enable;
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if (dcfg->pfc_mode_enable != scfg->pfc_mode_enable) {
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dcfg->pfc_mode_enable = scfg->pfc_mode_enable;
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changes |= BIT_PFC;
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}
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return 0;
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return changes;
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}
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static u8 ixgbe_dcbnl_get_state(struct net_device *netdev)
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@ -179,20 +211,6 @@ static void ixgbe_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
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if (up_map != DCB_ATTR_VALUE_UNDEFINED)
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adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap =
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up_map;
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if ((adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type !=
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adapter->dcb_cfg.tc_config[tc].path[0].prio_type) ||
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(adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id !=
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adapter->dcb_cfg.tc_config[tc].path[0].bwg_id) ||
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(adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent !=
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adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent) ||
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(adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap !=
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adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap))
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adapter->dcb_set_bitmap |= BIT_PG_TX;
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if (adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap !=
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adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap)
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adapter->dcb_set_bitmap |= BIT_PFC | BIT_APP_UPCHG;
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}
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static void ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
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@ -201,10 +219,6 @@ static void ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
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struct ixgbe_adapter *adapter = netdev_priv(netdev);
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adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] = bw_pct;
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if (adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] !=
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adapter->dcb_cfg.bw_percentage[0][bwg_id])
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adapter->dcb_set_bitmap |= BIT_PG_TX;
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}
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static void ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev, int tc,
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@ -223,20 +237,6 @@ static void ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev, int tc,
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if (up_map != DCB_ATTR_VALUE_UNDEFINED)
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adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap =
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up_map;
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if ((adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type !=
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adapter->dcb_cfg.tc_config[tc].path[1].prio_type) ||
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(adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id !=
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adapter->dcb_cfg.tc_config[tc].path[1].bwg_id) ||
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(adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent !=
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adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent) ||
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(adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap !=
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adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap))
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adapter->dcb_set_bitmap |= BIT_PG_RX;
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if (adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap !=
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adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap)
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adapter->dcb_set_bitmap |= BIT_PFC;
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}
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static void ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
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@ -245,10 +245,6 @@ static void ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
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struct ixgbe_adapter *adapter = netdev_priv(netdev);
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adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] = bw_pct;
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if (adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] !=
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adapter->dcb_cfg.bw_percentage[1][bwg_id])
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adapter->dcb_set_bitmap |= BIT_PG_RX;
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}
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static void ixgbe_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int tc,
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adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc = setting;
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if (adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc !=
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adapter->dcb_cfg.tc_config[priority].dcb_pfc) {
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adapter->dcb_set_bitmap |= BIT_PFC;
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adapter->dcb_cfg.tc_config[priority].dcb_pfc)
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adapter->temp_dcb_cfg.pfc_mode_enable = true;
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}
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}
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static void ixgbe_dcbnl_get_pfc_cfg(struct net_device *netdev, int priority,
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static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
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{
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struct ixgbe_adapter *adapter = netdev_priv(netdev);
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int ret, i;
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int ret = DCB_NO_HW_CHG;
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int i;
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#ifdef IXGBE_FCOE
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struct dcb_app app = {
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.selector = DCB_APP_IDTYPE_ETHTYPE,
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/* Fail command if not in CEE mode */
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if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
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return 1;
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return ret;
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ret = ixgbe_copy_dcb_cfg(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
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adapter->dcb_set_bitmap |= ixgbe_copy_dcb_cfg(&adapter->temp_dcb_cfg,
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&adapter->dcb_cfg,
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MAX_TRAFFIC_CLASS);
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if (ret)
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return DCB_NO_HW_CHG;
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if (!adapter->dcb_set_bitmap)
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return ret;
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if (adapter->dcb_cfg.pfc_mode_enable) {
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switch (adapter->hw.mac.type) {
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for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
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netdev_set_prio_tc_map(netdev, i, prio_tc[i]);
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ret = DCB_HW_CHG_RST;
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}
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if (adapter->dcb_set_bitmap & BIT_PFC) {
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DCB_TX_CONFIG, prio_tc);
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ixgbe_dcb_unpack_pfc(&adapter->dcb_cfg, &pfc_en);
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ixgbe_dcb_hw_pfc_config(&adapter->hw, pfc_en, prio_tc);
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if (ret != DCB_HW_CHG_RST)
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ret = DCB_HW_CHG;
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}
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struct ixgbe_adapter *adapter = netdev_priv(netdev);
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adapter->temp_dcb_cfg.pfc_mode_enable = state;
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if (adapter->temp_dcb_cfg.pfc_mode_enable !=
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adapter->dcb_cfg.pfc_mode_enable)
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adapter->dcb_set_bitmap |= BIT_PFC;
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}
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/**
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