/**
* ixgbe_ptp_reset
* @adapter: the ixgbe private board structure
*
* When the MAC resets, all of the hardware configuration for timesync is
* reset. This function should be called to re-enable the device for PTP,
* using the last known settings. However, we do lose the current clock time,
* so we fallback to resetting it based on the kernel's realtime clock.
*
* This function will maintain the hwtstamp_config settings, and it retriggers
* the SDP output if it's enabled.
*/
void ixgbe_ptp_reset(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
unsigned long flags;
/* reset the hardware timestamping mode */
ixgbe_ptp_set_timestamp_mode(adapter, &adapter->tstamp_config);
switch (hw->mac.type) {
case ixgbe_mac_X540:
case ixgbe_mac_82599EB:
ixgbe_ptp_start_cyclecounter(adapter);
spin_lock_irqsave(&adapter->tmreg_lock, flags);
timecounter_init(&adapter->hw_tc, &adapter->hw_cc,
ktime_to_ns(ktime_get_real()));
spin_unlock_irqrestore(&adapter->tmreg_lock, flags);
adapter->last_overflow_check = jiffies;
break;
default:
return;
}
/*
* Now that the shift has been calculated and the systime
* registers reset, (re-)enable the Clock out feature
*/
if (adapter->ptp_setup_sdp)
adapter->ptp_setup_sdp(adapter);
}
/**
* ixgbe_ptp_init
* @adapter - the ixgbe private adapter structure
*
* This function performs the required steps for enabling ptp
* support. If ptp support has already been loaded it simply calls the
* cyclecounter init routine and exits.
*/
void ixgbe_ptp_init(struct ixgbe_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
switch (adapter->hw.mac.type) {
case ixgbe_mac_X540:
snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr);
adapter->ptp_caps.owner = THIS_MODULE;
adapter->ptp_caps.max_adj = 250000000;
adapter->ptp_caps.n_alarm = 0;
adapter->ptp_caps.n_ext_ts = 0;
adapter->ptp_caps.n_per_out = 0;
adapter->ptp_caps.pps = 1;
adapter->ptp_caps.adjfreq = ixgbe_ptp_adjfreq;
adapter->ptp_caps.adjtime = ixgbe_ptp_adjtime;
adapter->ptp_caps.gettime = ixgbe_ptp_gettime;
adapter->ptp_caps.settime = ixgbe_ptp_settime;
adapter->ptp_caps.enable = ixgbe_ptp_enable;
break;
case ixgbe_mac_82599EB:
snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr);
adapter->ptp_caps.owner = THIS_MODULE;
adapter->ptp_caps.max_adj = 250000000;
adapter->ptp_caps.n_alarm = 0;
adapter->ptp_caps.n_ext_ts = 0;
adapter->ptp_caps.n_per_out = 0;
adapter->ptp_caps.pps = 0;
adapter->ptp_caps.adjfreq = ixgbe_ptp_adjfreq;
adapter->ptp_caps.adjtime = ixgbe_ptp_adjtime;
adapter->ptp_caps.gettime = ixgbe_ptp_gettime;
adapter->ptp_caps.settime = ixgbe_ptp_settime;
adapter->ptp_caps.enable = ixgbe_ptp_enable;
break;
default:
adapter->ptp_clock = NULL;
return;
}
spin_lock_init(&adapter->tmreg_lock);
ixgbe_ptp_start_cyclecounter(adapter);
/* (Re)start the overflow check */
adapter->flags2 |= IXGBE_FLAG2_OVERFLOW_CHECK_ENABLED;
adapter->ptp_clock = ptp_clock_register(&adapter->ptp_caps);
if (IS_ERR(adapter->ptp_clock)) {
adapter->ptp_clock = NULL;
e_dev_err("ptp_clock_register failed\n");
} else
e_dev_info("registered PHC device on %s\n", netdev->name);
return;
}
