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([2a0d:3344:2712:7e10:4d59:d956:544f:d65c]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4562e818525sm72859355e9.16.2025.07.18.02.09.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 18 Jul 2025 02:09:29 -0700 (PDT) Message-ID: <0becc009-68a8-452f-9115-a5df3ca998ed@redhat.com> Date: Fri, 18 Jul 2025 11:09:28 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next 3/3] net/mlx5: Support getcyclesx and getcrosscycles To: Carolina Jubran , Richard Cochran Cc: Saeed Mahameed , Leon Romanovsky , Mark Bloch , netdev@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, Tariq Toukan , Eric Dumazet , Jakub Kicinski , Andrew Lunn , "David S. Miller" References: <1752556533-39218-1-git-send-email-tariqt@nvidia.com> <1752556533-39218-4-git-send-email-tariqt@nvidia.com> <650be1b7-a175-4e89-b7ea-808ec0d2a8b3@redhat.com> <4b81bea4-ef05-4801-8903-2affa02d2366@nvidia.com> Content-Language: en-US From: Paolo Abeni In-Reply-To: <4b81bea4-ef05-4801-8903-2affa02d2366@nvidia.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 7/17/25 5:56 PM, Carolina Jubran wrote: > On 17/07/2025 13:55, Paolo Abeni wrote: >> On 7/15/25 7:15 AM, Tariq Toukan wrote: >>> From: Carolina Jubran >>> >>> Implement the getcyclesx64 and getcrosscycles callbacks in ptp_info to >>> expose the device’s raw free-running counter. >>> >>> Signed-off-by: Carolina Jubran >>> Reviewed-by: Dragos Tatulea >>> Signed-off-by: Tariq Toukan >>> --- >>> .../ethernet/mellanox/mlx5/core/lib/clock.c | 74 ++++++++++++++++++- >>> 1 file changed, 73 insertions(+), 1 deletion(-) >>> >>> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c >>> index b1e2deeefc0c..2f75726674a9 100644 >>> --- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c >>> +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c >>> @@ -306,6 +306,23 @@ static int mlx5_mtctr_syncdevicetime(ktime_t *device_time, >>> return 0; >>> } >>> >>> +static int >>> +mlx5_mtctr_syncdevicecyclestime(ktime_t *device_time, >>> + struct system_counterval_t *sys_counterval, >>> + void *ctx) >>> +{ >>> + struct mlx5_core_dev *mdev = ctx; >>> + u64 device; >>> + int err; >>> + >>> + err = mlx5_mtctr_read(mdev, false, sys_counterval, &device); >>> + if (err) >>> + return err; >>> + *device_time = ns_to_ktime(device); >> >> If the goal is providing a raw cycle counter, why still using a timespec >> to the user space? A plain u64 would possibly be less ambiguous. >> >> /P >> > > getcycles64 and getcrosscycles already return the cycle counter in a > timespec64/ktime format, so I kept the new ioctls consistent with them. Ah, sorry I missed that context. Looks good to me than. Thanks, Paolo