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NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | RETURN VALUE | SEE ALSO | NOTES | AUTHORS | COLOPHON |
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HNSDV_QUERY_DEVICE(3) HNS Direct Verbs Manual HNSDV_QUERY_DEVICE(3)
hnsdv_query_device - Query hns device specific attributes
#include <infiniband/hnsdv.h>
int hnsdv_query_device(struct ibv_context *context,
struct hnsdv_context *attrs_out);
hnsdv_query_device() Queries hns device specific attributes.
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
hnsdv_query_device() returns 0 on success, or the value of errno
on failure (which indicates the failure reason).
ibv_query_device(3)
• flags is an out field and currently has no values.
Junxian Huang ⟨[email protected]⟩
This page is part of the rdma-core (RDMA Core Userspace Libraries
and Daemons) project. Information about the project can be found
at ⟨https://github.com/linux-rdma/rdma-core⟩. If you have a bug
report for this manual page, send it to
[email protected]. This page was obtained from the
project's upstream Git repository
⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2025-08-11. (At
that time, the date of the most recent commit that was found in
the repository was 2025-08-04.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
hns 2024-02-06 HNSDV_QUERY_DEVICE(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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