Re: [for-next v4 0/5] ionic: RDMA completion timestamping support

[Leon Romanovsky <leon@kernel.org>]

On Wed, Jul 15, 2026 at 06:38:06PM +0530, Abhijit Gangurde wrote:
> Hi Jason, Jakub,
> 
> Gentle ping — if there are no further concerns, could this series be merged
> through the rdma tree?

Jason requested converting any driver that extends udata to
use uverbs_robust_udata.

https://lore.kernel.org/linux-rdma/13-v3-bd56dd443069+49-bnxt_re_uapi_jgg@nvidia.com/

Thanks

> 
> Thanks,
> Abhijit
> 
> On 6/10/26 21:12, Abhijit Gangurde wrote:
> > Hi,
> > 
> > This series adds RDMA completion timestamp support for ionic.
> > 
> > It enables PHC registration for RDMA timestamp capability, exposes a PHC
> > state page for safe user-space reads, maps that PHC state through RDMA
> > ucontext mmap, and extends the RDMA CQE format to carry completion
> > timestamps.
> > 
> > With this, user space can read completion timestamps and convert them to
> > wall time with low overhead.
> > 
> > Provider's PR: https://github.com/linux-rdma/rdma-core/pull/1724
> > 
> > v4:
> >    - Added alias mapping of mlx5_ib_clock_info to ib_uverbs_clock_info
> > v3:
> >    - Renamed ib_uverbs_phc_state to ib_uverbs_clock_info
> >    - Moved mlx5 to use the common clock info structure
> >    - Addressed review feedback from Sashiko
> >    - https://lore.kernel.org/linux-rdma/20260606050003.3648306-1-abhijit.gangurde@amd.com/
> > v2:
> >    - changed ionic_phc_state to ib_uverbs_phc_state and moved it under
> >      ib_user_verbs.h
> >    - https://lore.kernel.org/linux-rdma/20260512092623.1157199-1-abhijit.gangurde@amd.com/
> > v1:
> >    - https://lore.kernel.org/all/20260401102501.3395305-1-abhijit.gangurde@amd.com/
> > 
> > Abhijit Gangurde (5):
> >    net: ionic: register PHC for rdma timestamping
> >    net: ionic: Add PHC state page for user space access
> >    RDMA/ionic: map PHC state into user space
> >    RDMA/ionic: add completion timestamp to CQE format
> >    RDMA/mlx5: move mlx5 clock info to common struct ib_uverbs_clock_info
> > 
> >   .../infiniband/hw/ionic/ionic_controlpath.c   | 34 ++++++++++
> >   drivers/infiniband/hw/ionic/ionic_datapath.c  | 43 ++++++-------
> >   drivers/infiniband/hw/ionic/ionic_fw.h        | 12 +++-
> >   drivers/infiniband/hw/ionic/ionic_ibdev.h     |  2 +
> >   drivers/infiniband/hw/ionic/ionic_lif_cfg.c   |  2 +
> >   drivers/infiniband/hw/ionic/ionic_lif_cfg.h   |  1 +
> >   .../ethernet/pensando/ionic/ionic_ethtool.c   | 12 ++--
> >   .../net/ethernet/pensando/ionic/ionic_if.h    |  1 +
> >   .../net/ethernet/pensando/ionic/ionic_lif.c   |  5 +-
> >   .../net/ethernet/pensando/ionic/ionic_lif.h   |  3 +-
> >   .../net/ethernet/pensando/ionic/ionic_phc.c   | 63 ++++++++++++++++---
> >   include/uapi/rdma/ib_user_verbs.h             | 33 ++++++++++
> >   include/uapi/rdma/ionic-abi.h                 |  1 +
> >   include/uapi/rdma/mlx5-abi.h                  | 15 ++---
> >   14 files changed, 179 insertions(+), 48 deletions(-)
> >