[rdma-next,0/6] Introduce UCAP API and usage in mlx5

Message

Leon Romanovsky Feb. 26, 2025, 2:17 p.m. UTC

This series introduces the User CAPability (UCAP) API that allows
creating user contexts with various firmware privileges.

The UCAP API provides fine-grained control over specific firmware
features by representing each capability as a character device with root
read-write access. Root processes can grant users special privileges by
allowing access to these character devices. User contexts created using
a file descriptor of a UCAP will have specific UCAP privileges.

Two UCAP character devices are created for mlx5, and user contexts
opened with at least one of these UCAPs are considered privileged. To
ensure that privileged commands can always proceed, non-privileged
commands are limited when a privileged user is present on the device.

Thanks

Chiara Meiohas (5):
  RDMA/uverbs: Introduce UCAP (User CAPabilities) API
  RDMA/mlx5: Create UCAP char devices for supported device capabilities
  RDMA/uverbs: Add support for UCAPs in context creation
  RDMA/mlx5: Check enabled UCAPs when creating ucontext
  docs: infiniband: document the UCAP API

Patrisious Haddad (1):
  RDMA/mlx5: Expose RDMA TRANSPORT flow table types to userspace

 Documentation/infiniband/index.rst            |   1 +
 Documentation/infiniband/ucaps.rst            |  71 +++++
 drivers/infiniband/core/Makefile              |   3 +-
 drivers/infiniband/core/ucaps.c               | 255 ++++++++++++++++++
 drivers/infiniband/core/uverbs_cmd.c          |  19 ++
 drivers/infiniband/core/uverbs_main.c         |   2 +
 .../infiniband/core/uverbs_std_types_device.c |   4 +
 drivers/infiniband/hw/mlx5/devx.c             |  31 ++-
 drivers/infiniband/hw/mlx5/devx.h             |   5 +-
 drivers/infiniband/hw/mlx5/fs.c               | 154 ++++++++++-
 drivers/infiniband/hw/mlx5/fs.h               |   2 +
 drivers/infiniband/hw/mlx5/main.c             |  77 +++++-
 drivers/infiniband/hw/mlx5/mlx5_ib.h          |   3 +
 include/rdma/ib_ucaps.h                       |  25 ++
 include/rdma/ib_verbs.h                       |   1 +
 include/uapi/rdma/ib_user_ioctl_cmds.h        |   1 +
 include/uapi/rdma/mlx5_user_ioctl_cmds.h      |   1 +
 include/uapi/rdma/mlx5_user_ioctl_verbs.h     |   2 +
 18 files changed, 635 insertions(+), 22 deletions(-)
 create mode 100644 Documentation/infiniband/ucaps.rst
 create mode 100644 drivers/infiniband/core/ucaps.c
 create mode 100644 include/rdma/ib_ucaps.h