NAME

hnsdv_query_device - Query hns device specific attributes

SYNOPSIS

#include <infiniband/hnsdv.h>
int hnsdv_query_device(struct ibv_context *context,
                       struct hnsdv_context *attrs_out);

DESCRIPTION

hnsdv_query_device() Queries hns device specific attributes.

ARGUMENTS

Please see ibv_query_device(3) man page for context.

attrs_out

struct hnsdv_context {
        uint64_t comp_mask;
        uint64_t flags;
        uint8_t congest_type;
        uint8_t reserved[7];
};

comp_mask: Bitmask specifying what fields in the structure are valid:

HNSDV_CONTEXT_MASK_CONGEST_TYPE: Congestion control algorithm is supported.

congest_type: Bitmask of supported congestion control algorithms.

HNSDV_QP_CREATE_ENABLE_DCQCN: Data Center Quantized Congestion Notification HNSDV_QP_CREATE_ENABLE_LDCP: Low Delay Control Protocol HNSDV_QP_CREATE_ENABLE_HC3: Huawei Converged Congestion Control HNSDV_QP_CREATE_ENABLE_DIP: Destination IP based Quantized Congestion Notification

RETURN VALUE

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

NOTES

•: flags is an out field and currently has no values.

AUTHORS

Junxian Huang huangjunxian6@hisilicon.com