sdma_v4_0_page_resume(9)

📦 version 7.3.1, in nixpkgs unstable

💅 sdma_v4_0_page_resume — a Kernel API Manual moment 💅

okay so welcome to the group chat, bestie ✨ this one is from the Kernel API Manual and it's literally called sdma_v4_0_page_resume(9), which ngl sounds like a spell from a very specific computer-girlie grimoire 🧚

🌸 NAME 🌸

sdma_v4_0_page_resume — setup and start the async dma engines 💖

like, it wakes the async DMA engines up and gets them ready. main character energy fr fr 👑

✨ SYNOPSIS ✨

void sdma_v4_0_page_resume (struct amdgpu_device *adev , unsigned int i
);

so it's a void function (no return value coming back to haunt you, at least from the signature 🙈), and it takes an adev and an i. that's the whole vibe check.

🎀 ARGUMENTS 🎀

  • adev — an amdgpu_device pointer. it's the device bestie, the whole context, the it-girl of this call 🫶
  • i — the instance to resume. which one are we waking up? this number says. 🔥

🦋 DESCRIPTION 🦋

okay so what it actually does: it sets up the page DMA ring buffers and enables them 💅 and this is specifically the VEGA10 situation, iykyk, don't @ me on other hardware.

the page says it returns 0 for success and error for failure — but heads up, the signature in the synopsis is void, so that's the description's own little note and I'm just passing it along verbatim, no cap 😭 keep that in mind and don't come for me, I'm only the messenger 🍓

so: set up the page DMA ring buffers → enable them → VEGA10. those are the receipts, periodt.

🌈 SEE ALSO 🌈

the kernel file where all of this lives:

Kernel file ./drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c

and now the whole friend group, all 28 of them, no skipping, we love a complete roster 👑⭐:

and that's the page, bestie 🫶 it lives at ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and it ate, no crumbs 💅✨ mwah 🌸🎀💖

📦 where this page comes from