diff options
| author | Michael Chan <michael.chan@broadcom.com> | 2021-07-23 17:53:48 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-07-24 19:47:58 +0100 |
| commit | 89bc7f456cd40e0be7b94f4fdae9186f22b76a05 (patch) | |
| tree | df642956112be0cd798f4a7b9c1fb8ec57c86ff6 /drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | |
| parent | 3cf4375a090473d240281a0d2b04a3a5aaeac34b (diff) | |
bnxt_en: Add missing periodic PHC overflow check
We use the timecounter APIs for the 48-bit PHC and packet timestamps.
We must periodically update the timecounter at roughly half the
overflow interval. The overflow interval is about 78 hours, so
update it every 19 hours (1/4 interval) for some extra margins.
Fixes: 390862f45c85 ("bnxt_en: Get the full 48-bit hardware timestamp periodically")
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c index 9089e7f3fbd4..ec381c2423b8 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c @@ -353,6 +353,12 @@ static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info) bnxt_ptp_get_current_time(bp); ptp->next_period = now + HZ; + if (time_after_eq(now, ptp->next_overflow_check)) { + spin_lock_bh(&ptp->ptp_lock); + timecounter_read(&ptp->tc); + spin_unlock_bh(&ptp->ptp_lock); + ptp->next_overflow_check = now + BNXT_PHC_OVERFLOW_PERIOD; + } return HZ; } @@ -423,6 +429,7 @@ int bnxt_ptp_init(struct bnxt *bp) ptp->cc.shift = 0; ptp->cc.mult = 1; + ptp->next_overflow_check = jiffies + BNXT_PHC_OVERFLOW_PERIOD; timecounter_init(&ptp->tc, &ptp->cc, ktime_to_ns(ktime_get_real())); ptp->ptp_info = bnxt_ptp_caps; |