netdev - Re: [PATCH net-next 2/6] bnxt_en: Add PTP .getcrosststamp() interface to get device/host times

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Message-ID: <312f85f4-119c-4e8c-aeac-1d7f0a04d6c8@linux.dev>
Date: Mon, 5 Jan 2026 22:18:04 +0000
From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
To: Michael Chan <michael.chan@...adcom.com>, davem@...emloft.net
Cc: netdev@...r.kernel.org, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, andrew+netdev@...n.ch, pavan.chebbi@...adcom.com,
 andrew.gospodarek@...adcom.com, Somnath Kotur <somnath.kotur@...adcom.com>
Subject: Re: [PATCH net-next 2/6] bnxt_en: Add PTP .getcrosststamp() interface
 to get device/host times

On 1/5/26 21:58, Michael Chan wrote:
> From: Pavan Chebbi <pavan.chebbi@...adcom.com>
> 
> .getcrosststamp() helps the applications to obtain a snapshot of
> device and host time almost taken at the same time. This function
> will report PCIe PTM device and host times to any application using
> the ioctl PTP_SYS_OFFSET_PRECISE. The device time from the HW is
> 48-bit and needs to be converted to 64-bit.
> 
> Reviewed-by: Somnath Kotur <somnath.kotur@...adcom.com>
> Signed-off-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
> Signed-off-by: Michael Chan <michael.chan@...adcom.com>
> ---
> Cc: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
> 
> v2: Add check for x86 support
> 
> v1: https://lore.kernel.org/netdev/20251126215648.1885936-8-michael.chan@broadcom.com/
> ---
>   drivers/net/ethernet/broadcom/bnxt/bnxt.c     |  2 +
>   drivers/net/ethernet/broadcom/bnxt/bnxt.h     |  1 +
>   drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 47 +++++++++++++++++++
>   3 files changed, 50 insertions(+)

Reviewed-by: Vadim Fedorenko <vadim.fedorenko@...ux.dev>