/**
* i40e_ptp_init - Initialize the 1588 support after device probe or reset
* @pf: Board private structure
*
* This function sets device up for 1588 support. The first time it is run, it
* will create a PHC clock device. It does not create a clock device if one
* already exists. It also reconfigures the device after a reset.
**/
void i40e_ptp_init(struct i40e_pf *pf)
{
struct net_device *netdev = pf->vsi[pf->lan_vsi]->netdev;
struct i40e_hw *hw = &pf->hw;
u32 pf_id;
long err;
/* Only one PF is assigned to control 1588 logic per port. Do not
* enable any support for PFs not assigned via PRTTSYN_CTL0.PF_ID
*/
pf_id = (rd32(hw, I40E_PRTTSYN_CTL0) & I40E_PRTTSYN_CTL0_PF_ID_MASK) >>
I40E_PRTTSYN_CTL0_PF_ID_SHIFT;
if (hw->pf_id != pf_id) {
pf->flags &= ~I40E_FLAG_PTP;
dev_info(&pf->pdev->dev, "%s: PTP not supported on %s\n",
__func__,
netdev->name);
return;
}
/* we have to initialize the lock first, since we can't control
* when the user will enter the PHC device entry points
*/
spin_lock_init(&pf->tmreg_lock);
/* ensure we have a clock device */
err = i40e_ptp_create_clock(pf);
if (err) {
pf->ptp_clock = NULL;
dev_err(&pf->pdev->dev, "%s: ptp_clock_register failed\n",
__func__);
} else {
struct timespec64 ts;
u32 regval;
dev_info(&pf->pdev->dev, "%s: added PHC on %s\n", __func__,
netdev->name);
pf->flags |= I40E_FLAG_PTP;
/* Ensure the clocks are running. */
regval = rd32(hw, I40E_PRTTSYN_CTL0);
regval |= I40E_PRTTSYN_CTL0_TSYNENA_MASK;
wr32(hw, I40E_PRTTSYN_CTL0, regval);
regval = rd32(hw, I40E_PRTTSYN_CTL1);
regval |= I40E_PRTTSYN_CTL1_TSYNENA_MASK;
wr32(hw, I40E_PRTTSYN_CTL1, regval);
/* Set the increment value per clock tick. */
i40e_ptp_set_increment(pf);
/* reset timestamping mode */
i40e_ptp_set_timestamp_mode(pf, &pf->tstamp_config);
/* Set the clock value. */
ts = ktime_to_timespec64(ktime_get_real());
i40e_ptp_settime(&pf->ptp_caps, &ts);
}
}
/**
* i40e_ptp_init - Initialize the 1588 support after device probe or reset
* @pf: Board private structure
*
* This function sets device up for 1588 support. The first time it is run, it
* will create a PHC clock device. It does not create a clock device if one
* already exists. It also reconfigures the device after a reset.
*
* The first time a clock is created, i40e_ptp_create_clock will set
* pf->ptp_prev_hw_time to the current system time. During resets, it is
* expected that this timespec will be set to the last known PTP clock time,
* in order to preserve the clock time as close as possible across a reset.
**/
void i40e_ptp_init(struct i40e_pf *pf)
{
struct net_device *netdev = pf->vsi[pf->lan_vsi]->netdev;
struct i40e_hw *hw = &pf->hw;
u32 pf_id;
long err;
/* Only one PF is assigned to control 1588 logic per port. Do not
* enable any support for PFs not assigned via PRTTSYN_CTL0.PF_ID
*/
pf_id = (rd32(hw, I40E_PRTTSYN_CTL0) & I40E_PRTTSYN_CTL0_PF_ID_MASK) >>
I40E_PRTTSYN_CTL0_PF_ID_SHIFT;
if (hw->pf_id != pf_id) {
pf->flags &= ~I40E_FLAG_PTP;
dev_info(&pf->pdev->dev, "%s: PTP not supported on %s\n",
__func__,
netdev->name);
return;
}
mutex_init(&pf->tmreg_lock);
spin_lock_init(&pf->ptp_rx_lock);
/* ensure we have a clock device */
err = i40e_ptp_create_clock(pf);
if (err) {
pf->ptp_clock = NULL;
dev_err(&pf->pdev->dev, "%s: ptp_clock_register failed\n",
__func__);
} else if (pf->ptp_clock) {
u32 regval;
if (pf->hw.debug_mask & I40E_DEBUG_LAN)
dev_info(&pf->pdev->dev, "PHC enabled\n");
pf->flags |= I40E_FLAG_PTP;
/* Ensure the clocks are running. */
regval = rd32(hw, I40E_PRTTSYN_CTL0);
regval |= I40E_PRTTSYN_CTL0_TSYNENA_MASK;
wr32(hw, I40E_PRTTSYN_CTL0, regval);
regval = rd32(hw, I40E_PRTTSYN_CTL1);
regval |= I40E_PRTTSYN_CTL1_TSYNENA_MASK;
wr32(hw, I40E_PRTTSYN_CTL1, regval);
/* Set the increment value per clock tick. */
i40e_ptp_set_increment(pf);
/* reset timestamping mode */
i40e_ptp_set_timestamp_mode(pf, &pf->tstamp_config);
/* Restore the clock time based on last known value */
i40e_ptp_restore_hw_time(pf);
}
}
/**
* i40e_ptp_init - Initialize the 1588 support after device probe or reset
* @pf: Board private structure
*
* This function sets device up for 1588 support. The first time it is run, it
* will create a PHC clock device. It does not create a clock device if one
* already exists. It also reconfigures the device after a reset.
**/
void i40e_ptp_init(struct i40e_pf *pf)
{
struct net_device *netdev = pf->vsi[pf->lan_vsi]->netdev;
struct i40e_hw *hw = &pf->hw;
long err;
/* we have to initialize the lock first, since we can't control
* when the user will enter the PHC device entry points
*/
spin_lock_init(&pf->tmreg_lock);
/* ensure we have a clock device */
err = i40e_ptp_create_clock(pf);
if (err) {
pf->ptp_clock = NULL;
dev_err(&pf->pdev->dev, "%s: ptp_clock_register failed\n",
__func__);
} else {
struct timespec ts;
u32 regval;
dev_info(&pf->pdev->dev, "%s: added PHC on %s\n", __func__,
netdev->name);
pf->flags |= I40E_FLAG_PTP;
/* Ensure the clocks are running. */
regval = rd32(hw, I40E_PRTTSYN_CTL0);
regval |= I40E_PRTTSYN_CTL0_TSYNENA_MASK;
wr32(hw, I40E_PRTTSYN_CTL0, regval);
regval = rd32(hw, I40E_PRTTSYN_CTL1);
regval |= I40E_PRTTSYN_CTL1_TSYNENA_MASK;
wr32(hw, I40E_PRTTSYN_CTL1, regval);
/* Set the increment value per clock tick. */
i40e_ptp_set_increment(pf);
/* reset timestamping mode */
i40e_ptp_set_timestamp_mode(pf, &pf->tstamp_config);
/* Set the clock value. */
ts = ktime_to_timespec(ktime_get_real());
i40e_ptp_settime(&pf->ptp_caps, &ts);
}
}