user_sdma_txreq_cb(9)

✨ NAME ✨

user_sdma_txreq_cb(9) — SDMA tx request completion callback. This one lives in the Kernel API Manual, bestie. 💖

🌸 SYNOPSIS 🌸

void user_sdma_txreq_cb (struct sdma_txreq *txreq , int status );

🫶 ARGUMENTS 🫶

• txreq — valid sdma tx request. That's the request this callback is about, no cap. ✨
• status — success/failure of request. Basically the vibe check for whether it worked. 💅

💅 DESCRIPTION 💅

Okay so picture this: the SDMA progress state machine gets notification that the SDMA descriptors for this tx request have been processed by the DMA engine — and that's when this callback gets called. 🔥

It's called in interrupt context, so like, be normal about it. 😭 And the key thing: only do work on completed sequences. Periodt. 👑

🔍 SEE ALSO 🔍

• Kernel file ./drivers/infiniband/hw/hfi1/user_sdma.c — go read it, iykyk. 📖
• hfi1_user_sdma_process_request(9) — the related manual page, bestie. 🦋

This page is from ./drivers/infiniband/hw/hfi1, dated October 2026, and it's literally user_sdma_txreq_cb(9) — slay and goodbye. 💋🎀