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ixgbe: Allow link flow control in DCB mode for 82599 adapters

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82599 supports using either link flow control or priority flow control when
in DCB mode.  The dcbnl interface already supports sending down
configurations through rtnetlink that can enable LFC when DCB is enabled,
so the driver should take advantage of this.

82598 does not support using LFC when DCB is enabled, so explicitly disable
it when we're in DCB mode.  This means we always run in PFC mode when DCB
is enabled.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Peter P Waskiewicz Jr 2009-05-17 12:35:16 +00:00 committed by David S. Miller
parent 70b77628d8
commit 264857b8fe
7 changed files with 66 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/net/ixgbe/ixgbe.h
View file

@ -252,6 +252,7 @@ struct ixgbe_adapter {
struct ixgbe_dcb_config dcb_cfg;
struct ixgbe_dcb_config temp_dcb_cfg;
u8 dcb_set_bitmap;
enum ixgbe_fc_mode last_lfc_mode;
/* Interrupt Throttle Rate */
u32 itr_setting;

2
drivers/net/ixgbe/ixgbe_82598.c
View file

@ -363,7 +363,7 @@ static s32 ixgbe_fc_enable_82598(struct ixgbe_hw *hw, s32 packetbuf_num)
}
/* Configure pause time (2 TCs per register) */
reg = IXGBE_READ_REG(hw, IXGBE_FCTTV(packetbuf_num));
reg = IXGBE_READ_REG(hw, IXGBE_FCTTV(packetbuf_num / 2));
if ((packetbuf_num & 1) == 0)
reg = (reg & 0xFFFF0000) | hw->fc.pause_time;
else

5
drivers/net/ixgbe/ixgbe_common.c
View file

@ -1661,9 +1661,10 @@ s32 ixgbe_fc_enable(struct ixgbe_hw *hw, s32 packetbuf_num)
reg = IXGBE_READ_REG(hw, IXGBE_MTQC);
/* Thresholds are different for link flow control when in DCB mode */
if (reg & IXGBE_MTQC_RT_ENA) {
rx_pba_size = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(packetbuf_num));
/* Always disable XON for LFC when in DCB mode */
IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(packetbuf_num), 0);
rx_pba_size = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(packetbuf_num));
reg = (rx_pba_size >> 2) & 0xFFE0;
if (hw->fc.current_mode & ixgbe_fc_tx_pause)
reg |= IXGBE_FCRTH_FCEN;

4
drivers/net/ixgbe/ixgbe_dcb_82598.c
View file

@ -294,6 +294,9 @@ s32 ixgbe_dcb_config_pfc_82598(struct ixgbe_hw *hw,
u32 reg, rx_pba_size;
u8 i;
if (!dcb_config->pfc_mode_enable)
goto out;
/* Enable Transmit Priority Flow Control */
reg = IXGBE_READ_REG(hw, IXGBE_RMCS);
reg &= ~IXGBE_RMCS_TFCE_802_3X;
@ -341,6 +344,7 @@ s32 ixgbe_dcb_config_pfc_82598(struct ixgbe_hw *hw,
/* Configure flow control refresh threshold value */
IXGBE_WRITE_REG(hw, IXGBE_FCRTV, 0x3400);
out:
return 0;
}

32
drivers/net/ixgbe/ixgbe_dcb_nl.c
View file

@ -126,7 +126,10 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
netdev->netdev_ops->ndo_stop(netdev);
ixgbe_clear_interrupt_scheme(adapter);
adapter->hw.fc.requested_mode = ixgbe_fc_pfc;
if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
adapter->last_lfc_mode = adapter->hw.fc.current_mode;
adapter->hw.fc.requested_mode = ixgbe_fc_none;
}
adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
ixgbe_init_interrupt_scheme(adapter);
@ -135,11 +138,13 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
} else {
/* Turn off DCB */
if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
adapter->hw.fc.requested_mode = ixgbe_fc_default;
if (netif_running(netdev))
netdev->netdev_ops->ndo_stop(netdev);
ixgbe_clear_interrupt_scheme(adapter);
adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
adapter->temp_dcb_cfg.pfc_mode_enable = false;
adapter->dcb_cfg.pfc_mode_enable = false;
adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
ixgbe_init_interrupt_scheme(adapter);
@ -329,9 +334,24 @@ static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
return ret;
}
if (adapter->dcb_cfg.pfc_mode_enable) {
if ((adapter->hw.mac.type != ixgbe_mac_82598EB) &&
(adapter->hw.fc.current_mode != ixgbe_fc_pfc))
adapter->last_lfc_mode = adapter->hw.fc.current_mode;
adapter->hw.fc.requested_mode = ixgbe_fc_pfc;
} else {
if (adapter->hw.mac.type != ixgbe_mac_82598EB)
adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
else
adapter->hw.fc.requested_mode = ixgbe_fc_none;
}
if (netif_running(netdev))
ixgbe_up(adapter);
if (adapter->dcb_cfg.pfc_mode_enable)
adapter->hw.fc.current_mode = ixgbe_fc_pfc;
adapter->dcb_set_bitmap = 0x00;
clear_bit(__IXGBE_RESETTING, &adapter->state);
return ret;
@ -409,11 +429,17 @@ static u8 ixgbe_dcbnl_getpfcstate(struct net_device *netdev)
{
struct ixgbe_adapter *adapter = netdev_priv(netdev);
return !!(adapter->flags & IXGBE_FLAG_DCB_ENABLED);
return adapter->dcb_cfg.pfc_mode_enable;
}
static void ixgbe_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
{
struct ixgbe_adapter *adapter = netdev_priv(netdev);
adapter->temp_dcb_cfg.pfc_mode_enable = state;
if (adapter->temp_dcb_cfg.pfc_mode_enable !=
adapter->dcb_cfg.pfc_mode_enable)
adapter->dcb_set_bitmap |= BIT_PFC;
return;
}

10
drivers/net/ixgbe/ixgbe_ethtool.c
View file

@ -270,6 +270,13 @@ static int ixgbe_set_pauseparam(struct net_device *netdev,
struct ixgbe_adapter *adapter = netdev_priv(netdev);
struct ixgbe_hw *hw = &adapter->hw;
#ifdef CONFIG_DCB
if (adapter->dcb_cfg.pfc_mode_enable ||
((hw->mac.type == ixgbe_mac_82598EB) &&
(adapter->flags & IXGBE_FLAG_DCB_ENABLED)))
return -EINVAL;
#endif
if (pause->autoneg != AUTONEG_ENABLE)
hw->fc.disable_fc_autoneg = true;
else
@ -286,6 +293,9 @@ static int ixgbe_set_pauseparam(struct net_device *netdev,
else
return -EINVAL;
#ifdef CONFIG_DCB
adapter->last_lfc_mode = hw->fc.requested_mode;
#endif
hw->mac.ops.setup_fc(hw, 0);
return 0;

19
drivers/net/ixgbe/ixgbe_main.c
View file

@ -3554,6 +3554,7 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
adapter->dcb_cfg.rx_pba_cfg = pba_equal;
adapter->dcb_cfg.pfc_mode_enable = false;
adapter->dcb_cfg.round_robin_enable = false;
adapter->dcb_set_bitmap = 0x00;
ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
@ -3564,6 +3565,9 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
/* default flow control settings */
hw->fc.requested_mode = ixgbe_fc_full;
hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
#ifdef CONFIG_DCB
adapter->last_lfc_mode = hw->fc.current_mode;
#endif
hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
@ -4319,11 +4323,24 @@ static void ixgbe_watchdog_task(struct work_struct *work)
if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
if (link_up) {
#ifdef CONFIG_DCB
if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
hw->mac.ops.setup_fc(hw, i);
} else {
hw->mac.ops.setup_fc(hw, 0);
}
#else
hw->mac.ops.setup_fc(hw, 0);
#endif
}
if (link_up ||
time_after(jiffies, (adapter->link_check_timeout +
IXGBE_TRY_LINK_TIMEOUT))) {
IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
}
adapter->link_up = link_up;
adapter->link_speed = link_speed;