e1000: add smart power down code
Smart Power Down is a power saving feature in newer e1000 hardware. We disable it because it causes time to link to be long, but make it a user choice. Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
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3 changed files with 41 additions and 0 deletions
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@ -338,6 +338,7 @@ struct e1000_adapter {
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#ifdef NETIF_F_TSO
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boolean_t tso_force;
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#endif
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boolean_t smart_power_down; /* phy smart power down */
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unsigned long flags;
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};
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@ -607,6 +607,21 @@ e1000_reset(struct e1000_adapter *adapter)
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e1000_reset_adaptive(&adapter->hw);
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e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
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if (!adapter->smart_power_down &&
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(adapter->hw.mac_type == e1000_82571 ||
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adapter->hw.mac_type == e1000_82572)) {
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uint16_t phy_data = 0;
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/* speed up time to link by disabling smart power down, ignore
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* the return value of this function because there is nothing
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* different we would do if it failed */
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e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
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&phy_data);
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phy_data &= ~IGP02E1000_PM_SPD;
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e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
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phy_data);
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}
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if (adapter->en_mng_pt) {
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manc = E1000_READ_REG(&adapter->hw, MANC);
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manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
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@ -183,6 +183,15 @@ E1000_PARAM(RxAbsIntDelay, "Receive Absolute Interrupt Delay");
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E1000_PARAM(InterruptThrottleRate, "Interrupt Throttling Rate");
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/* Enable Smart Power Down of the PHY
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*
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* Valid Range: 0, 1
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*
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* Default Value: 0 (disabled)
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*/
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E1000_PARAM(SmartPowerDownEnable, "Enable PHY smart power down");
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#define AUTONEG_ADV_DEFAULT 0x2F
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#define AUTONEG_ADV_MASK 0x2F
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#define FLOW_CONTROL_DEFAULT FLOW_CONTROL_FULL
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@ -494,6 +503,22 @@ e1000_check_options(struct e1000_adapter *adapter)
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adapter->itr = opt.def;
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}
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}
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{ /* Smart Power Down */
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struct e1000_option opt = {
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.type = enable_option,
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.name = "PHY Smart Power Down",
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.err = "defaulting to Disabled",
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.def = OPTION_DISABLED
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};
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if (num_SmartPowerDownEnable > bd) {
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int spd = SmartPowerDownEnable[bd];
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e1000_validate_option(&spd, &opt, adapter);
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adapter->smart_power_down = spd;
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} else {
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adapter->smart_power_down = opt.def;
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}
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}
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switch (adapter->hw.media_type) {
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case e1000_media_type_fiber:
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