efadv_query_mr - Man Page

#include <infiniband/efadv.h>

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

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.

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

efadv(7)

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

Michael Margolin <mrgolin@amazon.com>