dma_cookie_status(9)

📦 version 7.3.1, in nixpkgs unstable

okay bestie, welcome to the Kernel API Manual — this one is short, sweet, and literally all about checking on a DMA cookie 🍪✨

✨ NAME ✨

dma_cookie_status — report cookie status

🌸 SYNOPSIS 🌸

enum dma_status dma_cookie_status (struct dma_chan *chan , dma_cookie_t
cookie , struct dma_tx_state *state );

🎀 ARGUMENTS 🎀

  • chan — dma channel
  • cookie — cookie we are interested in
  • state — dma_tx_state structure to return last/used cookies 🍓

three args, no cap 💅

🦋 DESCRIPTION 🦋

So this one reports the status of the cookie, and if state is non-NULL, it fills that state structure in for you. It’s giving “status report, but make it DMA” 👑

And the iconique part? No locking is required. fr fr, no mutex energy needed here 😌✨

🔥 SEE ALSO 🔥

Kernel file ./drivers/dma/dmaengine.h, plus the whole squad:

xoxo, from ./drivers/dma — October 2026 💖🫶

📦 where this page comes from