Provided by: libibverbs-dev_17.1-1ubuntu0.2_amd64 
NAME
mlx5dv - Direct verbs for mlx5 devices
This is low level access to mlx5 devices to perform data path operations, without general branching
performed by ibv_post_send(3).
DESCRIPTION
The libibverbs API is an abstract one. It is agnostic to any underlying provider specific implementation.
While this abstraction has the advantage of user applications portability it has a performance penalty.
For some applications optimizing performance is more important than portability.
The mlx5 direct verbs API is intended for such applications. It exposes mlx5 specific low level data
path (send/receive/completion) operations, allowing the application to bypass the libibverbs data path
API.
This interface consists from one hardware specific header file with relevant inline functions and
conversion logic from ibverbs structures to mlx5 specific structures.
The direct include of mlx5dv.h together with linkage to mlx5 library will allow usage of this new
interface.
Once an application uses the direct flow the locking scheme is fully managed by itself. There is an
expectation that no mixed flows in the data path for both direct/non-direct access will be by same
application.
NOTES
All Mellanox NIC devices starting from Connect-IB (Connect-IB, ConnectX-4, ConnectX-4Lx, ConnectX-5, ...)
implement the mlx5 API, thus using the mlx5 direct verbs does not limit the applications to a single NIC
HW device thus keeping some level of portability.
SEE ALSO
ibv_post_send(3), verbs(7)
AUTHORS
Leon Romanovsky <leonro@mellanox.com>