NAME¶

efadv_query_device - 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:

max_rdma_size

Maximum RDMA transfer size in bytes.

RETURN VALUE¶

efadv_query_device() 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¶

Gal Pressman galpress@amazon.com