Commit d43f5c21 authored by John Fastabend's avatar John Fastabend Committed by Jeff Kirsher
Browse files

ixgbe: DCB, do not reset on CEE pg changes 



The 82599 and 82598 devices do not require hardware resets to
configure CEE pg settings. This patch changes DCB configuration
to set the CEE pg values directly from the dcbnl ops routine.

This reduces the number of resets seen on the wire and allows
LLDP to reach a steady state faster.

Signed-off-by: default avatarJohn Fastabend <john.r.fastabend@intel.com>
Tested-by: default avatarRoss Brattain <ross.b.brattain@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent d033d526

drivers/net/ixgbe/ixgbe_dcb.h

+4 −0
Original line number Diff line number Diff line
@@ -148,6 +148,10 @@ struct ixgbe_dcb_config { 


/* DCB driver APIs */

void ixgbe_dcb_unpack_pfc(struct ixgbe_dcb_config *cfg, u8 *pfc_en);

void ixgbe_dcb_unpack_refill(struct ixgbe_dcb_config *, int, u16 *);

void ixgbe_dcb_unpack_max(struct ixgbe_dcb_config *, u16 *);

void ixgbe_dcb_unpack_bwgid(struct ixgbe_dcb_config *, int, u8 *);

void ixgbe_dcb_unpack_prio(struct ixgbe_dcb_config *, int, u8 *);



/* DCB credits calculation */

s32 ixgbe_ieee_credits(__u8 *bw, __u16 *refill, __u16 *max, int max_frame);

drivers/net/ixgbe/ixgbe_dcb_nl.c

+35 −13
Original line number Diff line number Diff line
@@ -225,10 +225,8 @@ static void ixgbe_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc, 
	    (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent !=

	     adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent) ||

	    (adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap !=

	     adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap)) {

	     adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap))

		adapter->dcb_set_bitmap |= BIT_PG_TX;

		adapter->dcb_set_bitmap |= BIT_RESETLINK;

	}

}



static void ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
@@ -239,10 +237,8 @@ static void ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id, 
	adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] = bw_pct;



	if (adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] !=

	    adapter->dcb_cfg.bw_percentage[0][bwg_id]) {

	    adapter->dcb_cfg.bw_percentage[0][bwg_id])

		adapter->dcb_set_bitmap |= BIT_PG_TX;

		adapter->dcb_set_bitmap |= BIT_RESETLINK;

	}

}



static void ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev, int tc,
@@ -269,10 +265,8 @@ static void ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev, int tc, 
	    (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent !=

	     adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent) ||

	    (adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap !=

	     adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap)) {

	     adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap))

		adapter->dcb_set_bitmap |= BIT_PG_RX;

		adapter->dcb_set_bitmap |= BIT_RESETLINK;

	}

}



static void ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
@@ -283,10 +277,8 @@ static void ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id, 
	adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] = bw_pct;



	if (adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] !=

	    adapter->dcb_cfg.bw_percentage[1][bwg_id]) {

	    adapter->dcb_cfg.bw_percentage[1][bwg_id])

		adapter->dcb_set_bitmap |= BIT_PG_RX;

		adapter->dcb_set_bitmap |= BIT_RESETLINK;

	}

}



static void ixgbe_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int tc,
@@ -421,7 +413,9 @@ static u8 ixgbe_dcbnl_set_all(struct net_device *netdev) 
				ixgbe_up(adapter);

		}

		ret = DCB_HW_CHG_RST;

	} else if (adapter->dcb_set_bitmap & BIT_PFC) {

	}



	if (adapter->dcb_set_bitmap & BIT_PFC) {

		u8 pfc_en;

		ixgbe_dcb_unpack_pfc(&adapter->dcb_cfg, &pfc_en);
@@ -431,6 +425,34 @@ static u8 ixgbe_dcbnl_set_all(struct net_device *netdev) 
			ixgbe_dcb_config_pfc_82599(&adapter->hw, pfc_en);

		ret = DCB_HW_CHG;

	}



	if (adapter->dcb_set_bitmap & (BIT_PG_TX|BIT_PG_RX)) {

		u16 refill[MAX_TRAFFIC_CLASS], max[MAX_TRAFFIC_CLASS];

		u8 bwg_id[MAX_TRAFFIC_CLASS], prio_type[MAX_TRAFFIC_CLASS];

		int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;



#ifdef CONFIG_FCOE

		if (adapter->netdev->features & NETIF_F_FCOE_MTU)

			max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);

#endif



		ixgbe_dcb_calculate_tc_credits(&adapter->hw, &adapter->dcb_cfg,

					       max_frame, DCB_TX_CONFIG);

		ixgbe_dcb_calculate_tc_credits(&adapter->hw, &adapter->dcb_cfg,

					       max_frame, DCB_RX_CONFIG);



		ixgbe_dcb_unpack_refill(&adapter->dcb_cfg,

					DCB_TX_CONFIG, refill);

		ixgbe_dcb_unpack_max(&adapter->dcb_cfg, max);

		ixgbe_dcb_unpack_bwgid(&adapter->dcb_cfg,

				       DCB_TX_CONFIG, bwg_id);

		ixgbe_dcb_unpack_prio(&adapter->dcb_cfg,

				      DCB_TX_CONFIG, prio_type);



		ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,

					bwg_id, prio_type);

	}



	if (adapter->dcb_cfg.pfc_mode_enable)

		adapter->hw.fc.current_mode = ixgbe_fc_pfc;

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