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ixgbe: fix 82599 KR downshift coexistence with LESM FW module

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Disable KR to KX4/KX downshift on 82599 backplane devices when
LESM (Link Establishment State Machine) is enabled in FW. Those
features cannot co-exist as they both manipulate the same registers.

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Acked-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Phillip Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Emil Tantilov 2011-03-18 08:18:32 +00:00 committed by Jeff Kirsher
parent 3d5c520727
commit 0fa6d83258
2 changed files with 48 additions and 1 deletions
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46
drivers/net/ixgbe/ixgbe_82599.c
View File

@ -61,6 +61,7 @@ static s32 ixgbe_setup_copper_link_82599(struct ixgbe_hw *hw,
bool autoneg,
bool autoneg_wait_to_complete);
static s32 ixgbe_verify_fw_version_82599(struct ixgbe_hw *hw);
static bool ixgbe_verify_lesm_fw_enabled_82599(struct ixgbe_hw *hw);
static void ixgbe_init_mac_link_ops_82599(struct ixgbe_hw *hw)
{
@ -86,7 +87,8 @@ static void ixgbe_init_mac_link_ops_82599(struct ixgbe_hw *hw)
if ((mac->ops.get_media_type(hw) ==
ixgbe_media_type_backplane) &&
(hw->phy.smart_speed == ixgbe_smart_speed_auto ||
hw->phy.smart_speed == ixgbe_smart_speed_on))
hw->phy.smart_speed == ixgbe_smart_speed_on) &&
!ixgbe_verify_lesm_fw_enabled_82599(hw))
mac->ops.setup_link = &ixgbe_setup_mac_link_smartspeed;
else
mac->ops.setup_link = &ixgbe_setup_mac_link_82599;
@ -2028,6 +2030,48 @@ fw_version_out:
return status;
}
/**
* ixgbe_verify_lesm_fw_enabled_82599 - Checks LESM FW module state.
* @hw: pointer to hardware structure
*
* Returns true if the LESM FW module is present and enabled. Otherwise
* returns false. Smart Speed must be disabled if LESM FW module is enabled.
**/
static bool ixgbe_verify_lesm_fw_enabled_82599(struct ixgbe_hw *hw)
{
bool lesm_enabled = false;
u16 fw_offset, fw_lesm_param_offset, fw_lesm_state;
s32 status;
/* get the offset to the Firmware Module block */
status = hw->eeprom.ops.read(hw, IXGBE_FW_PTR, &fw_offset);
if ((status != 0) ||
(fw_offset == 0) || (fw_offset == 0xFFFF))
goto out;
/* get the offset to the LESM Parameters block */
status = hw->eeprom.ops.read(hw, (fw_offset +
IXGBE_FW_LESM_PARAMETERS_PTR),
&fw_lesm_param_offset);
if ((status != 0) ||
(fw_lesm_param_offset == 0) || (fw_lesm_param_offset == 0xFFFF))
goto out;
/* get the lesm state word */
status = hw->eeprom.ops.read(hw, (fw_lesm_param_offset +
IXGBE_FW_LESM_STATE_1),
&fw_lesm_state);
if ((status == 0) &&
(fw_lesm_state & IXGBE_FW_LESM_STATE_ENABLED))
lesm_enabled = true;
out:
return lesm_enabled;
}
static struct ixgbe_mac_operations mac_ops_82599 = {
.init_hw = &ixgbe_init_hw_generic,
.reset_hw = &ixgbe_reset_hw_82599,

3
drivers/net/ixgbe/ixgbe_type.h
View File

@ -1625,6 +1625,9 @@
#define IXGBE_SAN_MAC_ADDR_PORT1_OFFSET 0x3
#define IXGBE_DEVICE_CAPS_ALLOW_ANY_SFP 0x1
#define IXGBE_DEVICE_CAPS_FCOE_OFFLOADS 0x2
#define IXGBE_FW_LESM_PARAMETERS_PTR 0x2
#define IXGBE_FW_LESM_STATE_1 0x1
#define IXGBE_FW_LESM_STATE_ENABLED 0x8000 /* LESM Enable bit */
#define IXGBE_FW_PASSTHROUGH_PATCH_CONFIG_PTR 0x4
#define IXGBE_FW_PATCH_VERSION_4 0x7