ibv_import_dm ibv_unimpoLibibverbs Programmer’ibvaimport_dm ibv_unimport_dm(3)
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 ob-
ject 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)
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