layout: page title: EFADV_QUERY_MR section: 3 tagline: Verbs date: 2023-11-13 header: “EFA Direct Verbs Manual” footer: efa

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).

NOTES

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

AUTHORS

Michael Margolin mrgolin@amazon.com