amdgpu_device_aper_access(9)

📦 version 7.3.1, in nixpkgs unstable

💖 amdgpu_device_aper_access(9) 💖

okay so bestie, welcome to the Kernel API Manual 🎀 — yes that's the manual name, we're in kernel-land now, put your hair up. This page is literally all about amdgpu_device_aper_access, which lets you touch vram through the vram aperture ✨. iykyk.

✨ NAME ✨

amdgpu_device_aper_access — access vram by vram aperture 💅

🦋 SYNOPSIS 🦋

size_t amdgpu_device_aper_access (struct amdgpu_device *adev , loff_t
pos , void *buf , size_t size , bool write );

like, that's the whole signature. she's compact. she's iconic. periodt.

🌸 ARGUMENTS 🌸

okay so every single one of these matters, don't skip 👑

  • adev — amdgpu_device pointer. it's giving "the GPU itself walked in".
  • pos — offset of the buffer in vram. where in vram we're poking around 👀
  • buf — virtual address of the buffer in system memory. this is your side of the conversation.
  • size — read/write size, and heads up: sizeof(buf) must > size 🫶 (yes, must, greater-than, no cap — that's the actual constraint, don't come for me).
  • write — true → write to vram, otherwise → read from vram. a little boolean doing main character energy 🔥

🌈 DESCRIPTION 🌈

The return value means how many bytes have been transferred. that's it, that's the vibe check — the number tells you how much actually moved 💫

👑 SEE ALSO 👑

first up, the Kernel file, literally where she lives: ./drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

and now the whole squad, the full roster, nobody left behind 💜 (all of these are (9) pages):

ok bestie ngl this next bit is the boring-but-required part so read it, don't scroll 🙈

this lil page comes from the source dir ./drivers/gpu/drm/amd/amdgpu 🧚 and she's dated October 2026 — so yeah, future energy fr fr ⭐ and this whole thing lives under amdgpu_device_aper_access(9), which is literally the header up top too. we went full circle 🌸

go touch some vram, but respectfully 💅🍓

📦 where this page comes from