hfi1_ud_rcv(9)

💌 hfi1_ud_rcv — like, the whole Kernel API Manual page, but make it make sense

Ok so bestie, welcome to the Kernel API Manual entry for hfi1_ud_rcv(9). Section 9, obviously — kernel developer vibes only. Let's get into it ✨

---

✨ NAME ✨

hfi1_ud_rcv — the moment an incoming UD packet shows up and this function is literally right there to receive it 💅

---

🌸 SYNOPSIS 🌸

void hfi1_ud_rcv (struct hfi1_packet *packet );

That's it. That's the whole call. One pointer, no drama, no return value. Iconic minimalism honestly 🎀

---

🦋 ARGUMENTS 🦋

• packet — the packet structure. Like, the packet structure. The one and only thing you hand over 🫶

---

💖 DESCRIPTION 💖

So here's the tea: this gets called from qp_rcv to process an incoming UD packet for the given QP. You're not the one kicking things off — qp_rcv is doing the intro, and hfi1_ud_rcv is the one actually handling the UD packet for that QP 😌

Heads up bestie: this is called at interrupt level. So like… context matters, ok? Don't be out here doing sleep-y things. You're in interrupt land now 👑

---

🌈 SEE ALSO 🌈

• Kernel file ./drivers/infiniband/hw/hfi1/ud.c — yeah, that's where the whole friend group lives
• ud_loopback(9) ✨
• hfi1_make_ud_req(9) ✨

---

🎀 a lil sign-off 🎀

That's the whole page, bestie! Source situation: ./drivers/infiniband/hw/hfi1, and the date stamp is October 2026. Go forth and receive those UD packets — you got this fr fr 💜🧚‍♀️