diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ixgbevf/vf.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbevf/vf.c | 49 |
1 files changed, 38 insertions, 11 deletions
diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.c b/drivers/net/ethernet/intel/ixgbevf/vf.c index 87b3f3bf1c1..a5e66c79f63 100644 --- a/drivers/net/ethernet/intel/ixgbevf/vf.c +++ b/drivers/net/ethernet/intel/ixgbevf/vf.c @@ -392,20 +392,23 @@ static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw, bool *link_up, bool autoneg_wait_to_complete) { + struct ixgbe_mbx_info *mbx = &hw->mbx; + struct ixgbe_mac_info *mac = &hw->mac; + s32 ret_val = 0; u32 links_reg; + u32 in_msg = 0; - if (!(hw->mbx.ops.check_for_rst(hw))) { - *link_up = false; - *speed = 0; - return -1; - } + /* If we were hit with a reset drop the link */ + if (!mbx->ops.check_for_rst(hw) || !mbx->timeout) + mac->get_link_status = true; - links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS); + if (!mac->get_link_status) + goto out; - if (links_reg & IXGBE_LINKS_UP) - *link_up = true; - else - *link_up = false; + /* if link status is down no point in checking to see if pf is up */ + links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS); + if (!(links_reg & IXGBE_LINKS_UP)) + goto out; switch (links_reg & IXGBE_LINKS_SPEED_82599) { case IXGBE_LINKS_SPEED_10G_82599: @@ -419,7 +422,31 @@ static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw, break; } - return 0; + /* if the read failed it could just be a mailbox collision, best wait + * until we are called again and don't report an error */ + if (mbx->ops.read(hw, &in_msg, 1)) + goto out; + + if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) { + /* msg is not CTS and is NACK we must have lost CTS status */ + if (in_msg & IXGBE_VT_MSGTYPE_NACK) + ret_val = -1; + goto out; + } + + /* the pf is talking, if we timed out in the past we reinit */ + if (!mbx->timeout) { + ret_val = -1; + goto out; + } + + /* if we passed all the tests above then the link is up and we no + * longer need to check for link */ + mac->get_link_status = false; + +out: + *link_up = !mac->get_link_status; + return ret_val; } /** |