mei_cl_dma_alloc_and_map(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 mei_cl_dma_alloc_and_map(9) — the Kernel API Manual cutie edit 🌸

okay so bestie, welcome to the Kernel API Manual entry for mei_cl_dma_alloc_and_map 💅 this one's short and sweet, so honestly? easy slay.

✨ NAME ✨

mei_cl_dma_alloc_and_map — send client dma map request 📨

✨ SYNOPSIS ✨

int mei_cl_dma_alloc_and_map (struct mei_cl *cl , const struct file *fp
, u8 buffer_id , size_t size );

like, that's the whole signature bestie, no cap 🫶

✨ ARGUMENTS ✨

  • cl — the host client 🧚
  • fp — pointer to the file structure 📁
  • buffer_id — the id of the mapped buffer, it's a u8 you guys ✨
  • size — size of the buffer, size_t, respect the type bestie 📏

✨ DESCRIPTION ✨

okay so the actual description here is literally one line and it's all about locking, so pay attention:

🔒 Locking: called under "dev->device_lock" lock — like, that's non-negotiable, do not show up to this function without the lock held, fr fr 😭

that's it, that's the description. short king behavior 👑

✨ RETURN ✨

it returns an int, and the possible values are:

  • -ENODEV
  • -EINVAL
  • -EOPNOTSUPP
  • -EPROTO
  • -ENOMEM;

(yes the semicolon is in the original, she said periodt 💀 keep it)

✨ SEE ALSO ✨

Kernel file ./drivers/misc/mei/client.c — and the whole friend group, literally the entire mei_me_cl and mei_cl extended universe 🎀 iykyk:

okay that's the page bestie, go forth and map those buffers 💖 this cutie came out of ./drivers/misc/mei and it's dated October 2026 — mwah, love u, bye 🎀🦋✨

📦 where this page comes from