diff options
| author |   Pavan Chebbi <pavan.chebbi@broadcom.com> | 2021-06-27 13:19:48 -0400 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-06-28 13:41:06 -0700 |
| commit | 7f5515d19cd7aa02a866fd86622a022f12e06f0f (patch) | |
| tree | ab499c8638268ee8ebddd107b858dcf6142fb702 /drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h | |
| parent | bnxt_en: Get the full 48-bit hardware timestamp periodically (diff) | |
| download | linux-dev-7f5515d19cd7aa02a866fd86622a022f12e06f0f.tar.xz linux-dev-7f5515d19cd7aa02a866fd86622a022f12e06f0f.zip | |
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.h')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h index 61a67055c812..4f2c62f5a78e 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h @@ -58,8 +58,21 @@ struct bnxt_ptp_cfg { u32 refclk_mapped_regs[2]; }; +#if BITS_PER_LONG == 32 +#define BNXT_READ_TIME64(ptp, dst, src) \ +do { \ + spin_lock_bh(&(ptp)->ptp_lock); \ + (dst) = (src); \ + spin_unlock_bh(&(ptp)->ptp_lock); \ +} while (0) +#else +#define BNXT_READ_TIME64(ptp, dst, src) \ + ((dst) = READ_ONCE(src)) +#endif + int bnxt_hwtstamp_set(struct net_device *dev, struct ifreq *ifr); int bnxt_hwtstamp_get(struct net_device *dev, struct ifreq *ifr); +int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts); void bnxt_ptp_start(struct bnxt *bp); int bnxt_ptp_init(struct bnxt *bp); void bnxt_ptp_clear(struct bnxt *bp); |