1ibv_import_dm ibv_unimporLti_bdimb(v3e)rbs Programmer’sibMva_niumaplort_dm ibv_unimport_dm(3)
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NAME

6       ibv_import_dm - import an DM from a given ibv_context
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8       ibv_unimport_dm - unimport an DM
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SYNOPSIS

11              #include <infiniband/verbs.h>
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13              struct ibv_dm *ibv_import_dm(struct ibv_context *context, uint32_t dm_handle);
14              void ibv_unimport_dm(struct ibv_dm *dm)
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DESCRIPTION

17       ibv_import_dm()  returns  a  Device memory (DM) that is associated with
18       the given dm_handle in the RDMA context.
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20       The input dm_handle value must be a valid kernel handle for an  DM  ob‐
21       ject  in  the  assosicated  RDMA  context.  It can be achieved from the
22       original DM by getting its ibv_dm->handle member value.
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24       ibv_unimport_dm() un import the DM.  Once the DM usage has  been  ended
25       ibv_free_dm()  or  ibv_unimport_dm()  should  be called.  The first one
26       will go to the kernel to destroy the object once  the  second  one  way
27       cleanup  what ever is needed/opposite of the import without calling the
28       kernel.
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30       This is the responsibility of the application to coordinate between all
31       ibv_context(s) that use this DM.  Once destroy is done no other process
32       can touch the object except for unimport.  All  users  of  the  context
33       must collaborate to ensure this.
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RETURN VALUE

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

SEE ALSO
41       ibv_alloc_dm(3), ibv_free_dm(3),
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AUTHOR
44       Maor Gottlieb <maorg@nvidia.com>
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48libibverbs                         2021-1-17  ibv_import_dm ibv_unimport_dm(3)



        

    


            
        

        

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