efadv_query_mr - Query EFA specific Memory Region attributes

Michael Margolin mrgolin@amazon.com efa 2023-11-13 EFADV_QUERY_MR(3)

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 - Query EFA specific Memory Region attributes

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

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

efadv(7)

#include <infiniband/efadv.h> int efadv_query_mr(struct ibv_mr *ibvmr, struct efadv_mr_attr *attr, uint32_t inlen);