Provided by: libibverbs-dev_28.0-1ubuntu1_amd64 bug


       mlx5dv_devx_umem_reg - Register a user memory to be used by the devx interface

       mlx5dv_devx_umem_dereg - Deregister a devx umem object


              #include <infiniband/mlx5dv.h>

              struct mlx5dv_devx_umem {
                  uint32_t umem_id;

              struct mlx5dv_devx_umem *
              mlx5dv_devx_umem_reg(struct ibv_context *context, void *addr, size_t size,
                           uint32_t access)

              int mlx5dv_devx_umem_dereg(struct mlx5dv_devx_umem *dv_devx_umem)


       Register or deregister a user memory to be used by the devx interface.

       The  register  verb  exposes a UMEM DEVX object for user memory registration for DMA.  The
       API to register the user memory gets as input the user address, length and  access  flags,
       and  provides  to  the  user  as  output an object which holds the UMEM ID returned by the
       firmware to this registered memory.

       The user will use that UMEM ID in device direct commands that use this memory  instead  of
       the physical addresses list, for example upon mlx5dv_devx_obj_create to create a QP.



              RDMA device context to create the action on.

       addr   The memory start address to register.


              The size of *addr* buffer.

       access The  desired  memory protection attributes; it is either 0 or the bitwise OR of one
              or more of enum ibv_access_flags.


       Upon success mlx5dv_devx_umem_reg will return a new  struct  mlx5dv_devx_umem  object,  on
       error NULL will be returned and errno will be set.

       mlx5dv_devx_umem_dereg  returns  0  on  success,  or  the value of errno on failure (which
       indicates the failure reason).


       mlx5dv_open_device(3), ibv_reg_mr(3), mlx5dv_devx_obj_create(3)


       Yishai Hadas <>

                                                  mlx5dv_devx_umem_reg, mlx5dv_devx_umem_dereg(3)