HNSDV_QUERY_DEVICE(3)

💅 HNSDV_QUERY_DEVICE(3) 💅

Okay so welcome to the HNS Direct Verbs Manual, bestie — this is the page for hnsdv_query_device, and it's lowkey giving "one job, done cute" energy. I'm obsessed. ✨

🌸 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 💖

The way that hnsdv_query_device() is literally just here to query hns device specific attributes — it's giving focused, lowkey iconic. No extra lore, no side quests, just device-attribute main character energy. 💅

🎀 ARGUMENTS 🎀

For context, please see the ibv_query_device(3) man page. That's the vibe check for that argument. 🫶

🦋 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). No cap. Slay. 💯

🌈 SEE ALSO 🌈

• ibv_query_device(3)

📝 NOTES 📝

• flags is an out field and currently has no values. That's it — the whole note, periodt. 💀

👑 AUTHORS 👑

Junxian Huang <huangjunxian6@hisilicon.com> — shoutout to the author, fr fr. 🫶

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Alright bestie, that's the whole page! Source/version: hns · date: 2024-02-06 · page: HNSDV_QUERY_DEVICE(3). Mwah 💋✨