sc_piobufavail(9)

🌸 NAME 🌸

okay so this is sc_piobufavail(9) from the Kernel API Manual, and it is literally the callback when a PIO buffer is available ✨ — bestie, that is the whole assignment 💅.

📞 SYNOPSIS 📞

void sc_piobufavail (struct send_context *sc );

🫶 ARGUMENTS 🫶

• sc — the send context. That is it, that is the whole argument, bestie 🎀.

💖 DESCRIPTION 💖

so picture this: hfi1_verbs_send returned an error that no buffers were available 😭, and then a PIO buffer is available — that is when this callback gets called from the interrupt handler. slay.

and if there are no more QPs waiting, disable the interrupt. periodt 🔥 that is the cleanup vibe.

👀 SEE ALSO 👀

• Kernel file ./drivers/infiniband/hw/hfi1/pio.c — go read the source, iykyk 📖
• sc_wait_for_packet_egress(9)
• pio_kernel_linkup(9)

with love from ./drivers/infiniband/hw/hfi1, October 2026, page sc_piobufavail(9) — mwah 💋✨