amdgpu_ih_ring_write(9)

📦 version 7.3.1, in nixpkgs unstable

💅 amdgpu_ih_ring_write(9) — the Kernel API Manual, but make it cute 🎀

okay so bestie, welcome to amdgpu_ih_ring_write(9) from the Kernel API Manual — this is the glow-up edition, and yes, we're getting into interrupt-vector ring buffer territory. buckle up, it's giving low-level but make it slay ✨

🌸 NAME 🌸

amdgpu_ih_ring_write — literally just writes an IV into the ring buffer. that's the whole vibe. no cap 💅

⭐ SYNOPSIS ⭐

void amdgpu_ih_ring_write (struct amdgpu_device *adev , struct
       amdgpu_ih_ring *ih , const uint32_t *iv , unsigned int num_dw );

yeah she's a void, she returns nothing, she simply does, and honestly? iconic 🫶

🦋 ARGUMENTS 🦋

okay so here's who's who in this little group chat:

  • adev — the amdgpu_device pointer, aka the main character of the whole AMD GPU show 👑
  • ih — the ih ring you're writing to. that's the destination, bestie, know your target 🎯
  • iv — the iv you're writing. this is the payload, the moment, the drama 🌈
  • num_dw — the size of the iv, measured in dw. so slay, we love a measured queen 💖

🔥 DESCRIPTION 🔥

so what does she actually do? she writes an IV to the ring buffer using the CPU, and then increments the wptr. that's it, that's the whole personality ✨

ngl, the use cases are very specific and very real:

  • used for testing 🧪
  • used for delegating IVs to a software ring 🧚
no extra lore here, bestie — that's genuinely what the manpage says. don't go inventing behaviour, that's not the vibe 🙈

💜 SEE ALSO 💜

go touch grass in the kernel source, iykyk:

  • Kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c 📁

and the whole friend group of related calls, fr fr:

aaaand that's the page! 💅 this cutie lives under ./drivers/gpu/drm/amd/amdgpu, dated October 2026, served fresh from the Kernel API Manual. mwah, go write some IVs responsibly, bestie 🍓🧚💜

📦 where this page comes from