netdev - Re: [PATCH iwl-next 2/2] ice: Enable SW interrupt from FW for LL TS

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Date: Fri, 24 Nov 2023 12:46:32 +0100
From: Przemek Kitszel <przemyslaw.kitszel@...el.com>
To: Karol Kolacinski <karol.kolacinski@...el.com>,
	<intel-wired-lan@...ts.osuosl.org>
CC: <netdev@...r.kernel.org>, <anthony.l.nguyen@...el.com>,
	<jesse.brandeburg@...el.com>, Yochai Hagvi <yochai.hagvi@...el.com>
Subject: Re: [PATCH iwl-next 2/2] ice: Enable SW interrupt from FW for LL TS

On 11/24/23 12:41, Karol Kolacinski wrote:
> Introduce new capability - Low Latency Timestamping with Interrupt.
> On supported devices, driver can request a single timestamp from FW
> without polling the register afterwards. Instead, FW can issue
> a dedicated interrupt when the timestamp was read from the PHY register
> and its value is available to read from the register.
> This eliminates the need of bottom half scheduling, which results in
> minimal delay for timestamping.
> 
> For this mode, allocate TS indices sequentially, so that timestamps are
> always completed in FIFO manner.
> 
> Co-developed-by: Yochai Hagvi <yochai.hagvi@...el.com>
> Signed-off-by: Yochai Hagvi <yochai.hagvi@...el.com>
> Signed-off-by: Karol Kolacinski <karol.kolacinski@...el.com>
> ---
>   drivers/net/ethernet/intel/ice/ice.h          |   2 +
>   drivers/net/ethernet/intel/ice/ice_common.c   |   3 +
>   .../net/ethernet/intel/ice/ice_hw_autogen.h   |   2 +
>   drivers/net/ethernet/intel/ice/ice_main.c     | 120 +++++++++++--
>   drivers/net/ethernet/intel/ice/ice_ptp.c      | 163 ++++++++++++++++--
>   drivers/net/ethernet/intel/ice/ice_ptp.h      |   9 +
>   drivers/net/ethernet/intel/ice/ice_ptp_hw.h   |   1 +
>   drivers/net/ethernet/intel/ice/ice_type.h     |   2 +
>   8 files changed, 274 insertions(+), 28 deletions(-)

Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>