Re: [PATCH for-next V2 0/5] User-space time-stamping support for mlx5_ib

Or Gerlitz
2015-12-23T17:16:18Z

On Tue, Dec 15, 2015 at 8:30 PM, Matan Barak <matanb-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> wrote:

> This patch-set adds user-space support for time-stamping in mlx5_ib.
> It implements the necessary API:
> (a) ib_create_cq_ex - Add support for CQ creation flags
> (b) ib_query_device - return timestamp_mask and hca_core_clock.

> We also add support for mmaping the HCA's free running clock.
> In order to do so, we use the response of the vendor's extended
> part in init_ucontext. This allows us to pass the page offset
> of the free running clock register to the user-space driver.
> In order to implement it in a future extensible manner, we use the
> same mechanism of verbs extensions to the mlx5 vendor part as well.

Hi Doug,

As Matan is now the maintainer of the mlx5_ib driver and this series
doesn't add any IB/core changes, we see no reason that it can't go
into 4.5. make sense?

Or

> Changes from v1:
> * Change ib_is_udata_cleared to use memchr_inv.
>
> Changes from v0:
> * Limit mmap PAGE_SIZE to 4K (security wise).
> * Optimize ib_is_udata_cleared.
> * Pass hca_core_clock_offset in the vendor's response part of init_ucontext.
>
> Matan Barak (5):
> IB/mlx5: Add create_cq extended command
> IB/core: Add ib_is_udata_cleared
> IB/mlx5: Add support for hca_core_clock and timestamp_mask
> IB/mlx5: Add hca_core_clock_offset to udata in init_ucontext
> IB/mlx5: Mmap the HCA's core clock register to user-space
>
> drivers/infiniband/hw/mlx5/cq.c | 7 ++++
> drivers/infiniband/hw/mlx5/main.c | 67 +++++++++++++++++++++++++++++++-----
> drivers/infiniband/hw/mlx5/mlx5_ib.h | 7 +++-
> drivers/infiniband/hw/mlx5/user.h | 12 +++++--
> include/linux/mlx5/device.h | 7 ++--
> include/linux/mlx5/mlx5_ifc.h | 9 +++--
> include/rdma/ib_verbs.h | 27 +++++++++++++++
> 7 files changed, 120 insertions(+), 16 deletions(-)
>
> --
> 2.1.0
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html