efadv_query_device - Man Page

Query device capabilities

Synopsis

#include <infiniband/efadv.h>

int efadv_query_device(struct ibv_context *ibvctx,
               struct efadv_device_attr *attr,
               uint32_t inlen);

Description

efadv_query_device() Queries EFA device specific attributes.

Compatibility is handled using the comp_mask and inlen fields.

struct efadv_device_attr {
    uint64_t comp_mask;
    uint32_t max_sq_wr;
    uint32_t max_rq_wr;
    uint16_t max_sq_sge;
    uint16_t max_rq_sge;
    uint16_t inline_buf_size;
    uint8_t reserved[2];
    uint32_t device_caps;
    uint32_t max_rdma_size;
};

inlen

In: Size of struct efadv_device_attr.

comp_mask

Compatibility mask.

max_sq_wr

Maximum Send Queue (SQ) Work Requests (WRs).

max_rq_wr

Maximum Receive Queue (RQ) Work Requests (WRs).

max_sq_sge

Maximum Send Queue (SQ) Scatter Gather Elements (SGEs).

max_rq_sge

Maximum Receive Queue (RQ) Scatter Gather Elements (SGEs).

inline_buf_size

Maximum inline buffer size.

device_caps

Bitmask of device capabilities:

EFADV_DEVICE_ATTR_CAPS_RDMA_READ: RDMA read is supported.

EFADV_DEVICE_ATTR_CAPS_RNR_RETRY: RNR retry is supported for SRD QPs.

EFADV_DEVICE_ATTR_CAPS_CQ_WITH_SGID: Reading source address (SGID) from receive completion descriptors is supported. Valid only for unknown AH.

EFADV_DEVICE_ATTR_CAPS_RDMA_WRITE: RDMA write is supported

EFADV_DEVICE_ATTR_CAPS_UNSOLICITED_WRITE_RECV: Indicates the device has support for creating QPs that can receive unsolicited RDMA write with immediate. RQ with this feature enabled will not consume any work requests in order to receive RDMA write with immediate and a WC generated for such receive will be marked as unsolicited.

max_rdma_size