NAME

       mlx4dv - Direct verbs for mlx4 devices
       This  is low level access to mlx4 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 mlx4 direct verbs API is intended for such applications.  It exposes mlx4 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 mlx4 specific structures.

       The direct include of mlx4dv.h together with linkage to mlx4 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

SEE ALSO

       ibv_post_send(3), verbs(7)

AUTHORS

       Maor Gottlieb <maorg@mellanox.com>