NAME

       ibv_import_dm - import an DM from a given ibv_context

       ibv_unimport_dm - unimport an DM

SYNOPSIS

              #include <infiniband/verbs.h>

              struct ibv_dm *ibv_import_dm(struct ibv_context *context, uint32_t dm_handle);
              void ibv_unimport_dm(struct ibv_dm *dm)

DESCRIPTION

       ibv_import_dm()  returns  a  Device  memory  (DM) that is associated with the given dm_handle in the RDMA
       context.

       The input dm_handle value must be a valid kernel handle for an DM object in the assosicated RDMA context.
       It can be achieved from the original DM by getting its ibv_dm->handle member value.

       ibv_unimport_dm() un import the DM.  Once the DM usage has been ended ibv_free_dm() or  ibv_unimport_dm()
       should  be  called.   The  first  one will go to the kernel to destroy the object once the second one way
       cleanup what ever is needed/opposite of the import without calling the kernel.

       This is the responsibility of the application to coordinate between all ibv_context(s) that use this  DM.
       Once destroy is done no other process can touch the object except for unimport.  All users of the context
       must collaborate to ensure this.

RETURN VALUE

       ibv_import_dm() returns a pointer to the allocated DM, or NULL if the request fails and errno is set.

NOTES

SEE ALSO

       ibv_alloc_dm(3), ibv_free_dm(3),

AUTHOR

       Maor Gottlieb maorg@nvidia.com

libibverbs                                          2021-1-17                   ibv_import_dm ibv_unimport_dm(3)