sdma_v4_0_load_microcode(9)

📦 version 7.3.1, in nixpkgs unstable

💖 sdma_v4_0_load_microcode(9) 💖

okay so this is a page from the Kernel API Manual, bestie — like, actual kernel docs, but make it cute. sit down, grab a strawberry 🍓, we're loading some microcode.

✨ NAME ✨

sdma_v4_0_load_microcode — load the sDMA ME ucode 🧚

🌸 SYNOPSIS 🌸

int sdma_v4_0_load_microcode (struct amdgpu_device *adev );

no cap, that's the whole signature. she takes one pointer and gives you back an int. iconic behavior tbh 👑

🎀 ARGUMENTS 🎀

  • adev — an amdgpu_device pointer. that's it. that's her whole argument list. main character energy fr 💅

🦋 DESCRIPTION 🦋

so what does she actually do? she loads the sDMA0/1 ucode. that's the microcode for the SDMA engines, in case the naming didn't already give it away (it did, she's not subtle).

return value check, because this is the important part 🔥:

  • returns 0 for success — slay, we love a zero 🫶
  • returns -EINVAL if the ucode is not available — like, the microcode just isn't there bestie, nothing she can do 😭
and yes, -EINVAL is the only failure code listed here, so don't go inventing others. the docs said what they said. periodt.

🌈 SEE ALSO 🌈

the source file lives at:

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

and here's the whole friend group, all listed, all linked, all equally iconic (do not make me pick favorites):

go read them, iykyk 💜

and that's the page!! 💀 no literally, that's it. this gem came out of ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and it's a sdma_v4_0_load_microcode(9) situation from top to bottom. mwah, bye bestie 🎀✨🦋

📦 where this page comes from