hfi1_setup_wqe(9)

📦 version 7.3.1, in nixpkgs unstable

💅 hfi1_setup_wqe — kernel API manual, section 9 🎀

Okay so bestie, grab a boba, because we're diving into hfi1_setup_wqe(9) — yes, that's the real name, section 9 of the Kernel API Manual, no cap. This one's a little cutie with a big job: it sets up the wqe. That's it. That's the vibe. ✨

🌸 NAME 🌸

hfi1_setup_wqe — set up the wqe 🫶

⭐ SYNOPSIS ⭐

int hfi1_setup_wqe (struct rvt_qp *qp , struct rvt_swqe *wqe , bool
*call_send );

Like, copy that exactly, bestie, character for character. Do not freestyle the signature. 🙈

🦋 ARGUMENTS 🦋

  • qp — The qp. Yep, the queue pair. That one. The main character of this whole situation. 👑
  • wqe — The built wqe. It's already built, okay? We're not building it here. We're just... setting it up. Big difference. 💅
  • call_send — Determine if the send should be posted or scheduled. So this little bool is lowkey the decision-maker — posted vs. scheduled, and it's literally the function's job to figure out which. 🎀

✨ DESCRIPTION ✨

So here's the tea: this function performs setup of the wqe. 🧚

The way that it works is, it's called prior to inserting the wqe into the ring but after the wqe has been setup by RDMAVT. So there's an order here — RDMAVT goes first, then this function slides in, then the wqe heads into the ring. Respect the pipeline, fr fr. 🌈

And why does this function even exist? Because it allows the driver the opportunity to perform validation and additional setup of the wqe. That's the whole point. The driver gets its moment. Main character energy, honestly. ⭐

Returns 0 on success, -EINVAL on failure. And yes, -EINVAL is the sad path — if you see that, something did not slay. 😭

👑 SEE ALSO 👑

Kernel file ./drivers/infiniband/hw/hfi1/qp.c — and look at this whole friend group:

iykyk 💜

💀 Quick vibe check: keep those names exactly as they are. No renaming, no "fixing", no merging. These are the real ones.

And that's the whole page, bestie — that's it, that's the manual. 🍓 This iconic little number lives over in ./drivers/infiniband/hw/hfi1 and it's dated October 2026, so like... future vibes. 🦋 Go forth, set up those wqes, and remember: 0 good, -EINVAL bad. Periodt. 💖✨

📦 where this page comes from