sdma_v4_4_2...ad_microcode(9)

📦 version 7.3.1, in nixpkgs unstable

💅 sdma_v4_4_2_inst_load_microcode — from the Kernel API Manual, bestie ✨

okay so real talk, today we're getting into sdma_v4_4_2_inst_load_microcode — that's the whole title, that's the manual page name, and honestly? iconic name, no notes 🎀

🌸 NAME 🌸

sdma_v4_4_2_inst_load_microcode — literally just loads the sDMA ME ucode. that's the gig. that's what she does 🫶

✨ SYNOPSIS ✨

int sdma_v4_4_2_inst_load_microcode (struct amdgpu_device *adev ,
uint32_t inst_mask );

like yes, that's the whole signature. she's compact. she's efficient. we respect her 💅

🦋 ARGUMENTS 🦋

  • adev — your amdgpu_device pointer, aka the whole device situation. she needs to know which GPU we're talking about, obviously 🙈
  • inst_mask — the mask of dma engine instances to be enabled. so like… which of the DMA engine girlies are getting the green light ⭐

🔥 DESCRIPTION 🔥

okay so what actually happens: this function loads the sDMA0/1 ucode. that's it. that's the vibe ✨

and she's got receipts on how it goes:

  • returns 0 for success — slay, we love a clean return 💖
  • returns -EINVAL if the ucode is not available — not slay, but it happens 😭

no cap, that's the whole behavioral contract. she either loads the ucode and tells you 0, or she hits you with -EINVAL because the ucode wasn't there. main character energy either way 👑

🧚 SEE ALSO 🧚

so there's a whole friend group here, and we're not leaving anyone out. first off, the source file:

./drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c

and then the entire crew, in order, no skips, iykyk:

like… that's thirty of them. thirty!! and every single one earned her spot 🫶💜

k that's the whole page bestie!! 💖✨🎀

and for the cute sign-off: this little beauty comes from the source path ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and it's filed under the very same sdma_v4_4_2...ad_microcode(9) name we opened with. periodt 🦋💅

📦 where this page comes from