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ixgbe: Update flow control state machine in link setup

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The flow control handling is overly complicated and difficult to maintain.
This patch cleans up the flow control handling and makes it much more
explicit.  It also adds 1G flow control autonegotiation, for 1G copper
links, 1G KX links, and 1G fiber links.

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
2009-02-06 21:46:54 -08:00
committed by David S. Miller
parent 394827913e
commit 0ecc061d19
7 changed files with 352 additions and 147 deletions
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77
drivers/net/ixgbe/ixgbe_main.c
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@@ -1954,11 +1954,43 @@ static void ixgbe_configure(struct ixgbe_adapter *adapter)
(adapter->rx_ring[i].count - 1));
}
/**
* ixgbe_link_config - set up initial link with default speed and duplex
* @hw: pointer to private hardware struct
*
* Returns 0 on success, negative on failure
**/
static int ixgbe_link_config(struct ixgbe_hw *hw)
{
u32 autoneg;
bool link_up = false;
u32 ret = IXGBE_ERR_LINK_SETUP;
if (hw->mac.ops.check_link)
ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
if (ret)
goto link_cfg_out;
if (hw->mac.ops.get_link_capabilities)
ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
&hw->mac.autoneg);
if (ret)
goto link_cfg_out;
if (hw->mac.ops.setup_link_speed)
ret = hw->mac.ops.setup_link_speed(hw, autoneg, true, link_up);
link_cfg_out:
return ret;
}
static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
struct ixgbe_hw *hw = &adapter->hw;
int i, j = 0;
int err;
int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
u32 txdctl, rxdctl, mhadd;
u32 gpie;
@@ -2039,6 +2071,10 @@ static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
ixgbe_irq_enable(adapter);
err = ixgbe_link_config(hw);
if (err)
dev_err(&adapter->pdev->dev, "link_config FAILED %d\n", err);
/* enable transmits */
netif_tx_start_all_queues(netdev);
@@ -2792,8 +2828,7 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
/* default flow control settings */
hw->fc.original_type = ixgbe_fc_none;
hw->fc.type = ixgbe_fc_none;
hw->fc.requested_mode = ixgbe_fc_none;
hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
@@ -3916,37 +3951,6 @@ static void ixgbe_netpoll(struct net_device *netdev)
}
#endif
/**
* ixgbe_link_config - set up initial link with default speed and duplex
* @hw: pointer to private hardware struct
*
* Returns 0 on success, negative on failure
**/
static int ixgbe_link_config(struct ixgbe_hw *hw)
{
u32 autoneg;
bool link_up = false;
u32 ret = IXGBE_ERR_LINK_SETUP;
if (hw->mac.ops.check_link)
ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
if (ret || !link_up)
goto link_cfg_out;
if (hw->mac.ops.get_link_capabilities)
ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
&hw->mac.autoneg);
if (ret)
goto link_cfg_out;
if (hw->mac.ops.setup_link_speed)
ret = hw->mac.ops.setup_link_speed(hw, autoneg, true, true);
link_cfg_out:
return ret;
}
static const struct net_device_ops ixgbe_netdev_ops = {
.ndo_open = ixgbe_open,
.ndo_stop = ixgbe_close,
@@ -4197,13 +4201,6 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
/* reset the hardware with the new settings */
hw->mac.ops.start_hw(hw);
/* link_config depends on start_hw being called at least once */
err = ixgbe_link_config(hw);
if (err) {
dev_err(&pdev->dev, "setup_link_speed FAILED %d\n", err);
goto err_register;
}
netif_carrier_off(netdev);
strcpy(netdev->name, "eth%d");