diff options
| author | Pavan Chebbi <pavan.chebbi@broadcom.com> | 2021-06-27 20:19:48 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-28 23:41:06 +0300 |
| commit | 7f5515d19cd7aa02a866fd86622a022f12e06f0f (patch) | |
| tree | ab499c8638268ee8ebddd107b858dcf6142fb702 /drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | |
| parent | 390862f45c85b8ebbf9c5c09192bf413a8fb72f8 (diff) | |
| download | linux-7f5515d19cd7aa02a866fd86622a022f12e06f0f.tar.xz | |
bnxt_en: Get the RX packet timestamp
If the RX packet is timestamped by the hardware, the RX completion
record will contain the lower 32-bit of the timestamp. This needs
to be combined with the upper 16-bit of the periodic timestamp that
we get from the timer. The previous snapshot in ptp->old_timer is
used to make sure that the snapshot is not ahead of the RX timestamp
and we adjust for wrap-around if needed.
v2: Make ptp->old_time read access safe on 32-bit CPUs.
Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.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 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c index b0563c7761ff..cea7220f3d1b 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c @@ -279,6 +279,22 @@ static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info) return HZ; } +int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts) +{ + struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; + u64 time; + + if (!ptp) + return -ENODEV; + + BNXT_READ_TIME64(ptp, time, ptp->old_time); + *ts = (time & BNXT_HI_TIMER_MASK) | pkt_ts; + if (pkt_ts < (time & BNXT_LO_TIMER_MASK)) + *ts += BNXT_LO_TIMER_MASK + 1; + + return 0; +} + void bnxt_ptp_start(struct bnxt *bp) { struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; |