EFADV_QUERY_MR(3)

NAME
efadv_query_mr - Query EFA specific Memory Region attributes

SYNOPSIS

        #include <infiniband/efadv.h>

        int efadv_query_mr(struct ibv_mr *ibvmr, struct efadv_mr_attr *attr, uint32_t inlen);

DESCRIPTION
efadv_query_mr() queries device-specific Memory Region attributes.

Compatibility is handled using the comp_mask and inlen fields.

        struct efadv_mr_attr {
            uint64_t comp_mask;
            uint16_t ic_id_validity;
            uint16_t recv_ic_id;
            uint16_t rdma_read_ic_id;
            uint16_t rdma_recv_ic_id;
        };

inlen
    In: Size of struct efadv_mr_attr.

comp_mask
    Compatibility mask.

ic_id_validity
    Validity mask of interconnect id fields:

    EFADV_MR_ATTR_VALIDITY_RECV_IC_ID: recv_ic_id has a valid value.

    EFADV_MR_ATTR_VALIDITY_RDMA_READ_IC_ID: rdma_read_ic_id has a valid value.

    EFADV_MR_ATTR_VALIDITY_RDMA_RECV_IC_ID: rdma_recv_ic_id has a valid value.

recv_ic_id
    Physical interconnect used by the device to reach the MR for receive operation.

rdma_read_ic_id
    Physical interconnect used by the device to reach the MR for RDMA read operation.

rdma_recv_ic_id
    Physical interconnect used by the device to reach the MR for RDMA write receive.

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

SEE ALSO
efadv(7)

NOTES

•   Compatibility mask (comp_mask) is an out field and currently has no values.

AUTHORS
Michael Margolin mrgolin@amazon.com