sdma_v5_2_g...ume_instance(9)

📦 version 7.3.1, in nixpkgs unstable

✨ sdma_v5_2_gfx_resume_instance ✨

okay so bestie, buckle up 💅 this one lives in the Kernel API Manual and it's lowkey one of the most important little functions in the sdma_v5_2 saga — it's the one that gets a specific SDMA engine up and running (or back up and running, no cap). Let's get into it 🫶

🌸 NAME 🌸

sdma_v5_2_gfx_resume_instance — start/restart a certain sdma engine ✨

🎀 SYNOPSIS 🎀

int sdma_v5_2_gfx_resume_instance (struct amdgpu_device *adev , int i ,
bool restore );

🦋 ARGUMENTS 🦋

  • adev — an amdgpu_device pointer, aka the whole GPU situation you're working with 👑
  • i — the instance, like which engine we're talking about, iykyk
  • restore — used to restore wptr when restart 💫 (yes, that's the whole vibe of this flag)

💖 DESCRIPTION 💖

So what does it actually do? It sets up the gfx DMA ring buffers and enables them — literally the main character energy of this function 🔥

And on restart? It restores wptr and rptr, periodt. Two pointers, put back where they belong, no drama.

Returns 0 for success ✅ (the good ending, we love to see it).

🌈 SEE ALSO 🌈

Bestie, the friend group is LARGE and we're listing every single one of them because they all matter 🫶

The kernel file itself lives at ./drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c — that's home base 🏠

Then the whole crew:

and that's the whole page, bestie 💜 this little icon came to you from the fine people at ./drivers/gpu/drm/amd/amdgpu, dated October 2026 — go off, kernel docs, you ate 🍓✨

📦 where this page comes from