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sfc: simplify RX datapath timestamping

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Use timestamp conversion function with correction to avoid duplicate
 correction handling.

Signed-off-by: Laurence Evans <levans@solarflare.com>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Laurence Evans 2018-01-25 17:27:02 +00:00 committed by David S. Miller
parent 6aa47c87cb
commit c4f64fcc4d
1 changed files with 5 additions and 8 deletions
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13
drivers/net/ethernet/sfc/ptp.c
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@ -586,8 +586,6 @@ static int efx_ptp_get_attributes(struct efx_nic *efx)
return -ERANGE;
}
ptp->time_format = fmt;
/* MC_CMD_PTP_OP_GET_ATTRIBUTES is an extended version of an older
* operation MC_CMD_PTP_OP_GET_TIME_FORMAT that also returns a value
* to use for the minimum acceptable corrected synchronization window.
@ -1869,10 +1867,7 @@ void __efx_rx_skb_attach_timestamp(struct efx_channel *channel,
u32 diff, carry;
struct skb_shared_hwtstamps *timestamps;
pkt_timestamp_minor = (efx_rx_buf_timestamp_minor(efx,
skb_mac_header(skb)) +
(u32) efx->ptp_data->ts_corrections.rx) &
(MINOR_TICKS_PER_SECOND - 1);
pkt_timestamp_minor = efx_rx_buf_timestamp_minor(efx, skb_mac_header(skb));
/* get the difference between the packet and sync timestamps,
* modulo one second
@ -1910,8 +1905,10 @@ void __efx_rx_skb_attach_timestamp(struct efx_channel *channel,
/* attach the timestamps to the skb */
timestamps = skb_hwtstamps(skb);
timestamps->hwtstamp =
efx_ptp_s27_to_ktime(pkt_timestamp_major, pkt_timestamp_minor);
timestamps->hwtstamp = efx_ptp_s27_to_ktime_correction(
pkt_timestamp_major,
pkt_timestamp_minor,
efx->ptp_data->ts_corrections.rx);
}
static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta)