[PATCH rdma-next v4 00/10] RDMA/mana_ib: Add kernel RC and fast registration support

[Konstantin Taranov <kotaranov@linux.microsoft.com>]

From: Konstantin Taranov <kotaranov@microsoft.com>

Add kernel RC QPs and fast-registration MRs to the MANA RDMA driver
for kernel consumers such as NVMe/RDMA and NFS/RDMA.

Implement QP creation and state management, work request posting,
completion processing, error handling, and queue draining. Kernel RC
QPs require extended-WQE and power-of-two-SQ hardware support.

Tested with krping, NVMe/RDMA, and NFS/RDMA, including RC send and
receive error recovery with krping and NVMe/RDMA.

v4:
- Patch 01: Use an explicit 64-byte FMR MST alignment
- Patch 02: Validate that the RNIC firmware reports at least two send
  SGEs and subtract the reserved SGE only for RNIC-based mana_ib.
- Patch 07: Add missing wqe_size to shadow wqe for SEND/Write, and
  return a missed-event hint for cached CQEs when CQ is armed

v3:
- Patch 07: Mask arm_psn to 24 bits before ringing the doorbell.
- Patch 08: Exclude userspace QPs from kernel software-state handling
  and CQ error-list insertion, and unlink UC QPs during destruction.

v2:
- Patch 03: Validate fixed-WQE capacity for the header, OOB and SGEs.
- Patch 04: Preserve UC QP modification support.
- Patch 08: Skip software CQ notifications for direct-polling CQs.
- Patch 09: Flush that ERR work during QP teardown.
- Patch 10: Limit drain callbacks to RC QPs and avoid completion
  callbacks for direct-polling CQs.

Konstantin Taranov (10):
  RDMA/mana_ib: Allocate and map fast-registration MRs
  RDMA/mana: Create and destroy kernel RC QPs
  net/mana: Extend GDMA encoding for new RDMA WQEs
  RDMA/mana_ib: Maintain kernel RC QP state
  RDMA/mana_ib: Post receive WRs on kernel RC QPs
  RDMA/mana_ib: Post send and memory-management WRs on RC QPs
  RDMA/mana_ib: Poll RC completions using PSN and FSN progress
  RDMA/mana_ib: Flush and notify CQs when kernel QPs enter ERR
  RDMA/mana_ib: Handle error CQEs for RC QPs
  RDMA/mana_ib: Drain kernel receive and send queues

 drivers/infiniband/hw/mana/cq.c                 | 248 ++++++++++++++-
 drivers/infiniband/hw/mana/device.c             |   4 +
 drivers/infiniband/hw/mana/main.c               |  15 +-
 drivers/infiniband/hw/mana/mana_ib.h            | 137 ++++++++-
 drivers/infiniband/hw/mana/mr.c                 |  84 ++++-
 drivers/infiniband/hw/mana/qp.c                 | 342 ++++++++++++++++++++-
 drivers/infiniband/hw/mana/shadow_queue.h       |  22 ++
 drivers/infiniband/hw/mana/wr.c                 | 388 ++++++++++++++++++++++++
 drivers/net/ethernet/microsoft/mana/gdma_main.c |  55 +++-
 include/net/mana/gdma.h                         |  38 ++-
 10 files changed, 1296 insertions(+), 37 deletions(-)

-- 
2.43.0