Re: [PATCH net-next 3/3] bnxt_en: Add a non-real time mode to access NIC clock

[Leon Romanovsky <leon@kernel.org>]

On Sun, Nov 06, 2022 at 07:16:32PM -0500, Michael Chan wrote:
> From: Pavan Chebbi <pavan.chebbi@broadcom.com>
> 
> When using a PHC that is shared between multiple hosts,
> in order to achieve consistent timestamps across all hosts,
> we need to isolate the PHC from any host making frequency
> adjustments.
> 
> This patch adds a non-real time mode for this purpose.
> The implementation is based on a free running NIC hardware timer
> which is used as the timestamper time-base. Each host implements
> individual adjustments to a local timecounter based on the NIC free
> running timer.
> 
> Cc: Richard Cochran <richardcochran@gmail.com>
> Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
> Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
> Signed-off-by: Michael Chan <michael.chan@broadcom.com>
> ---
>  drivers/net/ethernet/broadcom/bnxt/bnxt.c     |  5 ++-
>  drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 45 ++++++++++++++-----
>  drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h |  7 ++-
>  3 files changed, 42 insertions(+), 15 deletions(-)
> 

Thanks,
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>