cik_get_ih_wptr(9)

📦 version 7.3.1, in nixpkgs unstable

💅 cik_get_ih_wptr — the cik_get_ih_wptr(9) glow-up 🦋

okay so bestie, welcome to the Kernel API Manual ✨ we're doing kernel stuff today and honestly? we're gonna slay it. this is cik_get_ih_wptr(9), and she's a little function with main character energy 💖

🌸 NAME 🌸

cik_get_ih_wptr — get the IH ring buffer wptr 🎀

that's it. that's the whole vibe. she gets the wptr. iconic behavior, no notes 💅

✨ SYNOPSIS ✨

u32 cik_get_ih_wptr (struct radeon_device *rdev );

look at her go 🫶 one arg, one return, zero drama. fr fr.

💜 ARGUMENTS 💜

  • rdev — a radeon_device pointer 🖥️ like, the whole GPU device situation in pointer form. she needs it, she uses it, she hands you back a u32. simple as that.

🦋 DESCRIPTION 🦋

okay so here's the tea ☕ cik_get_ih_wptr goes and grabs the IH ring buffer wptr from either the register or the writeback memory buffer (that's the CIK situation, iykyk) 💫

but wait, there's more — she also checks for ring buffer overflow and, like, deals with it 😤 not me being responsible with error handling. we love a function with self-awareness.

she's used by cik_irq_process — that's her caller, her ride-or-die 🌈 and she returns the value of the wptr 👑

tldr: fetch the wptr, vibe check the ring buffer, handle overflow, return the number. periodt 💀✨

🎀 SEE ALSO 🎀

bestie, the friend group is huge, buckle up 💖 she references the kernel file ./drivers/gpu/drm/radeon/cik.c and literally all of these:

like I said. a lot of friends. all of them real, all of them staying 💜

and that's the page!! mwah 💋 this one lives in ./drivers/gpu/drm/radeon, version date October 2026, and it is literally so cik-core. go read the source bestie, ily, bye 🧚‍♀️⭐🍓

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