On Tue, 2018-01-16 at 20:08 +0200, Leon Romanovsky wrote:
> From Feras:
>
> This series adds the ability to query mlx5 core clock info from userspace
> applications. This will allow userspace applications to translate timestamps
> from HCA core clock units to nanoseconds using the latest clock info.
>
> The first patch creates a new clock info page, which will be updated in
> the kernel only, and the second patch maps the page to userspace.
>
> In order to read the clock info correctly, a sequence number is incremented
> at the beginning and end of each update. An odd number means the data is
> being updated while an even means the access was already done.
>
> To ensure correctness, the user will:
>
> repeat:
> seq1 = <read sequence>
> goto <repeate> while odd
> <read data structure>
> seq2 = <read sequence>
> if seq1 != seq2 goto repeat
>
> Thanks
>
> Feras Daoud (2):
> net/mlx5e: Add clock info page to mlx5 core devices
> IB/mlx5: Mmap the HCA's clock info to user-space
>
> drivers/infiniband/hw/mlx5/main.c | 44 ++++++++++++++++-
> drivers/infiniband/hw/mlx5/mlx5_ib.h | 10 ----
> .../net/ethernet/mellanox/mlx5/core/lib/clock.c | 55 ++++++++++++++++++++++
> include/linux/mlx5/driver.h | 3 ++
> include/uapi/rdma/mlx5-abi.h | 34 ++++++++++++-
> 5 files changed, 133 insertions(+), 13 deletions(-)
>
> --
> 2.15.1
>
Thanks, series applied.
--
Doug Ledford <dledford@xxxxxxxxxx>
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