diff options
Diffstat (limited to 'drivers/net/ethernet/intel/igc/igc_ptp.c')
-rw-r--r-- | drivers/net/ethernet/intel/igc/igc_ptp.c | 50 |
1 files changed, 31 insertions, 19 deletions
diff --git a/drivers/net/ethernet/intel/igc/igc_ptp.c b/drivers/net/ethernet/intel/igc/igc_ptp.c index 928f387922..885faaa7b9 100644 --- a/drivers/net/ethernet/intel/igc/igc_ptp.c +++ b/drivers/net/ethernet/intel/igc/igc_ptp.c @@ -459,12 +459,10 @@ static int igc_ptp_systim_to_hwtstamp(struct igc_adapter *adapter, /** * igc_ptp_rx_pktstamp - Retrieve timestamp from Rx packet buffer * @adapter: Pointer to adapter the packet buffer belongs to - * @buf: Pointer to packet buffer + * @buf: Pointer to start of timestamp in HW format (2 32-bit words) * - * This function retrieves the timestamp saved in the beginning of packet - * buffer. While two timestamps are available, one in timer0 reference and the - * other in timer1 reference, this function considers only the timestamp in - * timer0 reference. + * This function retrieves and converts the timestamp stored at @buf + * to ktime_t, adjusting for hardware latencies. * * Returns timestamp value. */ @@ -474,17 +472,8 @@ ktime_t igc_ptp_rx_pktstamp(struct igc_adapter *adapter, __le32 *buf) u32 secs, nsecs; int adjust; - /* Timestamps are saved in little endian at the beginning of the packet - * buffer following the layout: - * - * DWORD: | 0 | 1 | 2 | 3 | - * Field: | Timer1 SYSTIML | Timer1 SYSTIMH | Timer0 SYSTIML | Timer0 SYSTIMH | - * - * SYSTIML holds the nanoseconds part while SYSTIMH holds the seconds - * part of the timestamp. - */ - nsecs = le32_to_cpu(buf[2]); - secs = le32_to_cpu(buf[3]); + nsecs = le32_to_cpu(buf[0]); + secs = le32_to_cpu(buf[1]); timestamp = ktime_set(secs, nsecs); @@ -542,10 +531,11 @@ static void igc_ptp_enable_rx_timestamp(struct igc_adapter *adapter) for (i = 0; i < adapter->num_rx_queues; i++) { val = rd32(IGC_SRRCTL(i)); - /* FIXME: For now, only support retrieving RX timestamps from - * timer 0. + /* Enable retrieving timestamps from timer 0, the + * "adjustable clock" and timer 1 the "free running + * clock". */ - val |= IGC_SRRCTL_TIMER1SEL(0) | IGC_SRRCTL_TIMER0SEL(0) | + val |= IGC_SRRCTL_TIMER1SEL(1) | IGC_SRRCTL_TIMER0SEL(0) | IGC_SRRCTL_TIMESTAMP; wr32(IGC_SRRCTL(i), val); } @@ -1035,6 +1025,26 @@ static int igc_ptp_getcrosststamp(struct ptp_clock_info *ptp, adapter, &adapter->snapshot, cts); } +static int igc_ptp_getcyclesx64(struct ptp_clock_info *ptp, + struct timespec64 *ts, + struct ptp_system_timestamp *sts) +{ + struct igc_adapter *igc = container_of(ptp, struct igc_adapter, ptp_caps); + struct igc_hw *hw = &igc->hw; + unsigned long flags; + + spin_lock_irqsave(&igc->free_timer_lock, flags); + + ptp_read_system_prets(sts); + ts->tv_nsec = rd32(IGC_SYSTIML_1); + ts->tv_sec = rd32(IGC_SYSTIMH_1); + ptp_read_system_postts(sts); + + spin_unlock_irqrestore(&igc->free_timer_lock, flags); + + return 0; +} + /** * igc_ptp_init - Initialize PTP functionality * @adapter: Board private structure @@ -1088,6 +1098,7 @@ void igc_ptp_init(struct igc_adapter *adapter) adapter->ptp_caps.adjfine = igc_ptp_adjfine_i225; adapter->ptp_caps.adjtime = igc_ptp_adjtime_i225; adapter->ptp_caps.gettimex64 = igc_ptp_gettimex64_i225; + adapter->ptp_caps.getcyclesx64 = igc_ptp_getcyclesx64; adapter->ptp_caps.settime64 = igc_ptp_settime_i225; adapter->ptp_caps.enable = igc_ptp_feature_enable_i225; adapter->ptp_caps.pps = 1; @@ -1108,6 +1119,7 @@ void igc_ptp_init(struct igc_adapter *adapter) } spin_lock_init(&adapter->ptp_tx_lock); + spin_lock_init(&adapter->free_timer_lock); spin_lock_init(&adapter->tmreg_lock); adapter->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE; |