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ixgbe: Avoid needless PHY access on copper phys 

Avoid a needless PHY access on copper phys to save the 10ms wait
time for each PHY access. A helper function is introduced to
actually do the register access and process the contents.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Mark Rustad 2015-06-25 17:49:57 -07:00 committed by Jeff Kirsher
parent 897b9349f0
commit ae8140aa6b
2 changed files with 44 additions and 21 deletions
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64
drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
View File

@ -729,40 +729,62 @@ s32 ixgbe_setup_phy_link_speed_generic(struct ixgbe_hw *hw,
return 0;
}
/**
* ixgbe_get_copper_speeds_supported - Get copper link speed from phy
* @hw: pointer to hardware structure
*
* Determines the supported link capabilities by reading the PHY auto
* negotiation register.
*/
static s32 ixgbe_get_copper_speeds_supported(struct ixgbe_hw *hw)
{
u16 speed_ability;
s32 status;
status = hw->phy.ops.read_reg(hw, MDIO_SPEED, MDIO_MMD_PMAPMD,
&speed_ability);
if (status)
return status;
if (speed_ability & MDIO_SPEED_10G)
hw->phy.speeds_supported |= IXGBE_LINK_SPEED_10GB_FULL;
if (speed_ability & MDIO_PMA_SPEED_1000)
hw->phy.speeds_supported |= IXGBE_LINK_SPEED_1GB_FULL;
if (speed_ability & MDIO_PMA_SPEED_100)
hw->phy.speeds_supported |= IXGBE_LINK_SPEED_100_FULL;
switch (hw->mac.type) {
case ixgbe_mac_X550:
hw->phy.speeds_supported |= IXGBE_LINK_SPEED_2_5GB_FULL;
hw->phy.speeds_supported |= IXGBE_LINK_SPEED_5GB_FULL;
break;
case ixgbe_mac_X550EM_x:
hw->phy.speeds_supported &= ~IXGBE_LINK_SPEED_100_FULL;
break;
default:
break;
}
return 0;
}
/**
* ixgbe_get_copper_link_capabilities_generic - Determines link capabilities
* @hw: pointer to hardware structure
* @speed: pointer to link speed
* @autoneg: boolean auto-negotiation value
*
* Determines the link capabilities by reading the AUTOC register.
*/
s32 ixgbe_get_copper_link_capabilities_generic(struct ixgbe_hw *hw,
ixgbe_link_speed *speed,
bool *autoneg)
{
s32 status;
u16 speed_ability;
s32 status = 0;
*speed = 0;
*autoneg = true;
if (!hw->phy.speeds_supported)
status = ixgbe_get_copper_speeds_supported(hw);
status = hw->phy.ops.read_reg(hw, MDIO_SPEED, MDIO_MMD_PMAPMD,
&speed_ability);
if (status == 0) {
if (speed_ability & MDIO_SPEED_10G)
*speed |= IXGBE_LINK_SPEED_10GB_FULL;
if (speed_ability & MDIO_PMA_SPEED_1000)
*speed |= IXGBE_LINK_SPEED_1GB_FULL;
if (speed_ability & MDIO_PMA_SPEED_100)
*speed |= IXGBE_LINK_SPEED_100_FULL;
}
/* Internal PHY does not support 100 Mbps */
if (hw->mac.type == ixgbe_mac_X550EM_x)
*speed &= ~IXGBE_LINK_SPEED_100_FULL;
*speed = hw->phy.speeds_supported;
return status;
}

1
drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
View File

@ -3384,6 +3384,7 @@ struct ixgbe_phy_info {
u32 phy_semaphore_mask;
bool reset_disable;
ixgbe_autoneg_advertised autoneg_advertised;
ixgbe_link_speed speeds_supported;
enum ixgbe_smart_speed smart_speed;
bool smart_speed_active;
bool multispeed_fiber;