EFADV_QUERY_DEVICE(3) EFA Direct Verbs Manual EFADV_QUERY_DEVICE(3)
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:
EFADV_DEVICE_ATTR_CAPS_RDMA_READ: RDMA read is supported.
EFADV_DEVICE_ATTR_CAPS_RNR_RETRY: RNR retry is supported for SRD
QPs.
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>
efa 2019-04-22 EFADV_QUERY_DEVICE(3)
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