[PATCH net-next,rdma-next 0/6][pull request] Add RDMA support for Intel IPU E2000 in idpf

[Tony Nguyen <anthony.l.nguyen@intel.com>]

This is part two in adding RDMA support for idpf.
This shared pull request targets both net-next and rdma-next branches
and is based on tag v6.16-rc1.

IWL reviews:
v3: https://lore.kernel.org/all/20250708210554.1662-1-tatyana.e.nikolova@intel.com/
v2: https://lore.kernel.org/all/20250612220002.1120-1-tatyana.e.nikolova@intel.com/
v1 (split from previous series):
    https://lore.kernel.org/all/20250523170435.668-1-tatyana.e.nikolova@intel.com/

v3: https://lore.kernel.org/all/20250207194931.1569-1-tatyana.e.nikolova@intel.com/
RFC v2: https://lore.kernel.org/all/20240824031924.421-1-tatyana.e.nikolova@intel.com/
RFC: https://lore.kernel.org/all/20240724233917.704-1-tatyana.e.nikolova@intel.com/

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Tatyana Nikolova says:

This idpf patch series is the second part of the staged submission for
introducing RDMA RoCEv2 support for the IPU E2000 line of products,
referred to as GEN3.

To support RDMA GEN3 devices, the idpf driver uses common definitions
of the IIDC interface and implements specific device functionality in
iidc_rdma_idpf.h.

The IPU model can host one or more logical network endpoints called
vPorts per PCI function that are flexibly associated with a physical
port or an internal communication port.

Other features as it pertains to GEN3 devices include:
* MMIO learning
* RDMA capability negotiation
* RDMA vectors discovery between idpf and control plane

These patches are split from the submission "Add RDMA support for Intel
IPU E2000 (GEN3)" [1]. The patches have been tested on a range of hosts
and platforms with a variety of general RDMA applications which include
standalone verbs (rping, perftest, etc.), storage and HPC applications.

Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

[1] https://lore.kernel.org/all/20240724233917.704-1-tatyana.e.nikolova@intel.com/

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The following changes since commit 19272b37aa4f83ca52bdf9c16d5d81bdd1354494:

  Linux 6.16-rc1 (2025-06-08 13:44:43 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/linux.git for-next

for you to fetch changes up to 6aa53e861c1a0c042690c9b7c5c153088ae61079:

  idpf: implement get LAN MMIO memory regions (2025-07-14 10:57:51 -0700)

----------------------------------------------------------------
Joshua Hay (6):
      idpf: use reserved RDMA vectors from control plane
      idpf: implement core RDMA auxiliary dev create, init, and destroy
      idpf: implement RDMA vport auxiliary dev create, init, and destroy
      idpf: implement remaining IDC RDMA core callbacks and handlers
      idpf: implement IDC vport aux driver MTU change handler
      idpf: implement get LAN MMIO memory regions

 drivers/net/ethernet/intel/idpf/Makefile        |   1 +
 drivers/net/ethernet/intel/idpf/idpf.h          | 116 +++++-
 drivers/net/ethernet/intel/idpf/idpf_controlq.c |  14 +-
 drivers/net/ethernet/intel/idpf/idpf_controlq.h |  18 +-
 drivers/net/ethernet/intel/idpf/idpf_dev.c      |  49 ++-
 drivers/net/ethernet/intel/idpf/idpf_idc.c      | 503 ++++++++++++++++++++++++
 drivers/net/ethernet/intel/idpf/idpf_lib.c      | 104 ++++-
 drivers/net/ethernet/intel/idpf/idpf_main.c     |  32 +-
 drivers/net/ethernet/intel/idpf/idpf_mem.h      |   8 +-
 drivers/net/ethernet/intel/idpf/idpf_txrx.h     |   1 +
 drivers/net/ethernet/intel/idpf/idpf_vf_dev.c   |  45 ++-
 drivers/net/ethernet/intel/idpf/idpf_virtchnl.c | 191 ++++++++-
 drivers/net/ethernet/intel/idpf/idpf_virtchnl.h |   3 +
 drivers/net/ethernet/intel/idpf/virtchnl2.h     |  41 +-
 include/linux/net/intel/iidc_rdma_idpf.h        |  55 +++
 15 files changed, 1107 insertions(+), 74 deletions(-)
 create mode 100644 drivers/net/ethernet/intel/idpf/idpf_idc.c
 create mode 100644 include/linux/net/intel/iidc_rdma_idpf.h