cik_irq_init(9)

📦 version 7.3.1, in nixpkgs unstable

💖 cik_irq_init — Kernel API Manual 💖

okay so real talk, bestie: this page lives in the Kernel API Manual (that's the section 9 vibe, kernel-internals girlies know) and it's all about one lil function that gets the interrupt ring up and running. it's giving "backstage pass to the GPU" energy. let's go 🎀

✨ NAME ✨

cik_irq_init — literally init and enable the interrupt ring, no cap 🔥

🦋 SYNOPSIS 🦋

int cik_irq_init (struct radeon_device *rdev );

that's it. one argument. one int coming back at you. iconic.

🌸 ARGUMENTS 🌸

  • rdev — a radeon_device pointer 🫶 that's the whole thing, bestie. it's a pointer to the radeon device struct.

👑 DESCRIPTION 👑

so here's the tea, and it's a lot of steps, so stay with me:

  • allocate a ring buffer for the interrupt controller 🎀
  • enable the RLC ⭐
  • disable interrupts 💀
  • enable the IH ring buffer 💅
  • and then enable it (CIK) ✨

this bad boy gets called at device load and at reume — yes, that's spelled reume in the original and i'm preserving it because we respect the source's little quirks, okay? 🙈 (you and me both know it means resume.)

returns 0 for success, and errors for failure. simple as that, fr fr.

🌈 SEE ALSO 🌈

first up, the kernel file it all lives in, bestie — go read the source:

  • ./drivers/gpu/drm/radeon/cik.c

and now the full friend group 🫶 (keeping every single one, in order, because nobody gets left behind):

lowkey the bandwidth girlies ate with those dce8_* names. genuinely a whole saga. 🧚

okay that's the whole page!! mwah 💋 this one shipped from ./drivers/gpu/drm/radeon, October 2026 vintage — go forth and initialize those interrupts, bestie. 💜🌸✨

📦 where this page comes from