make_rc_ack(9)

make_rc_ack(9) — Kernel API Manual 💅✨

okay so this is the manual page for make_rc_ack(9), and it’s literally about constructing a response packet. bestie, we’re talking ACK, NAK, or RDMA read energy. 🫶

🌸 NAME 🌸

make_rc_ack — construct a response packet (ACK, NAK, or RDMA read) 💖

🦋 SYNOPSIS 🦋

the signature, character-for-character, no cap:

int make_rc_ack (struct hfi1_ibdev *dev , struct rvt_qp *qp , struct
       ib_other_headers *ohdr , struct hfi1_pkt_state *ps );

💖 ARGUMENTS 💖

• dev — the device for this QP 🌟
• qp — a pointer to the QP 🎀
• ohdr — a pointer to the IB header being constructed 🦋
• ps — the xmit packet state ✨

✨ DESCRIPTION ✨

Return 1 if constructed; otherwise, return 0. 📝

Note that we are in the responder's side of the QP context. 👀

Note the QP s_lock must be held. like, fr fr, hold it. 🔒💅

🔥 SEE ALSO 🔥

Kernel file: ./drivers/infiniband/hw/hfi1/rc.c — and here’s the whole friend group:

• hfi1_make_rc_req(9)
• update_num_rd_atomic(9)
• reset_psn(9)
• hfi1_rc_verbs_aborted(9)
• update_qp_retry_state(9)
• rc_rcv_resp(9)
• rc_rcv_error(9)
• hfi1_rc_rcv(9)

xoxo, from ./drivers/infiniband/hw/hfi1, dated October 2026 — make_rc_ack(9) signing off 💜🌈🫶