[SRU][B/aws, F, G] EFA: add support for 0xefa1 devices

[Kamal Mostafa]

BugLink: https://bugs.launchpad.net/bugs/1896791

AWS RDMA/efa driver: add support for new AWS EFA '0xefa1' devices.

These are cherry-picks and simple context backports of mainline commits
to the AWS 'efa' driver, needed to support future AWS EFA Infiniband
devices.

 -Kamal


[Impact]

The following 4 mainline commits are required to support the new device
features and ID:

d4f9cb5c5b22 RDMA/efa: Add EFA 0xefa1 PCI ID
a5d87b698547 RDMA/efa: User/kernel compatibility handshake mechanism
da2924bdca99 RDMA/efa: Expose minimum SQ size
556c811f24b3 RDMA/efa: Expose maximum TX doorbell batch

[Test Case]

New device is not yet generally available, but has been tested by AWS.

[Regression Potential]

Low regression potential; Affects only the EFA driver.

[Other Info]

Focal and Groovy generic kernels can easily support this patch set, so
lets do that, to provide wider support and an updated driver source
baseline for those.

Bionic can only support it in bionic/linux-aws (not generic), so lets do
that.

-----

Gal Pressman (4):
  RDMA/efa: Expose maximum TX doorbell batch
  RDMA/efa: Expose minimum SQ size
  RDMA/efa: User/kernel compatibility handshake mechanism
  RDMA/efa: Add EFA 0xefa1 PCI ID

 .../infiniband/hw/efa/efa_admin_cmds_defs.h   | 15 ++++++-
 drivers/infiniband/hw/efa/efa_com_cmd.c       |  2 +
 drivers/infiniband/hw/efa/efa_com_cmd.h       |  2 +
 drivers/infiniband/hw/efa/efa_main.c          |  6 ++-
 drivers/infiniband/hw/efa/efa_verbs.c         | 42 +++++++++++++++++++
 include/uapi/rdma/efa-abi.h                   | 15 ++++++-
 6 files changed, 77 insertions(+), 5 deletions(-)

-- 
2.17.1