Re: [PATCH rdma-next 0/5] RDMA/mana_ib: Streamline kernel UD/GSI posting and completion handling

[Leon Romanovsky <leon@kernel.org>]

On Wed, Sep 16, 2026 at 06:48:30AM -0700, Konstantin Taranov wrote:
> From: Konstantin Taranov <kotaranov@microsoft.com>
> 
> This series updates the kernel UD/GSI work-request and completion paths in
> the MANA RDMA driver. The existing completion path copies CQE information
> into shadow entries and then walks the QPs attached to a CQ to produce
> work completions. This adds bookkeeping and a second pass over information
> that is already available when processing the CQE.
> 
> Generate work completions directly from CQEs and the corresponding posted
> shadow entries instead. Keep only QPs requiring software flushing on the
> CQ's error lists, and use the caller's remaining completion budget to
> retire their outstanding requests. The explicit GSI send-drain path adds
> the QP to the error list and invokes the CQ handler.
> 
> The shared GDMA SGE writer and explicit-index doorbell helper are included
> with their first users so this series does not depend on a later GDMA
> change. The WQE definitions and polling context also provide groundwork
> for a separate kernel RC series; RC posting, PSN/FSN processing, hardware
> error-CQE handling.

I read the commit messages, but couldn't find much information about what
you are doing or why. They only describe the implementation, in AI prose.

Thanks

> 
> Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com>
> 
> Konstantin Taranov (5):
>   RDMA/mana_ib: Optimize shadow queue bookkeeping
>   RDMA/mana_ib: Revise UD send posting and WQE definitions
>   RDMA/mana_ib: Revise UD receive posting with GDMA_WR_IB_SGL
>   RDMA/mana_ib: Make kernel CQ arming robust
>   RDMA/mana_ib: Poll UD completions and flush software error QPs
> 
>  drivers/infiniband/hw/mana/cq.c               | 315 +++++++++++++-----
>  drivers/infiniband/hw/mana/mana_ib.h          | 101 +++++-
>  drivers/infiniband/hw/mana/qp.c               |  78 +++--
>  drivers/infiniband/hw/mana/shadow_queue.h     |  60 ++--
>  drivers/infiniband/hw/mana/wr.c               | 141 ++++----
>  .../net/ethernet/microsoft/mana/gdma_main.c   |  43 ++-
>  include/net/mana/gdma.h                       |   9 +-
>  7 files changed, 527 insertions(+), 220 deletions(-)
> 
> 
> base-commit: 63367df6e7255067ad6a83abe0d2799dfa491876
> -- 
> 2.43.0