sdma_v2_4_emit_copy_buffer(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 sdma_v2_4_emit_copy_buffer 🌸

okay so bestie, this is a page from the Kernel API Manual — it's all about sdma_v2_4_emit_copy_buffer(9), and honestly? it's giving "small function, big job" energy 💅

✨ NAME ✨

sdma_v2_4_emit_copy_buffer — copy buffer using the sDMA engine 🫶

🎀 SYNOPSIS 🎀

void sdma_v2_4_emit_copy_buffer (struct amdgpu_ib *ib , uint64_t
src_offset , uint64_t dst_offset , uint32_t byte_count , uint32_t
copy_flags );

like, that's the whole signature, no cap. returns void, so it's not gonna hand you back anything — it just does the thing ✨

💖 ARGUMENTS 💖

  • ib — the indirect buffer we're copying to. your destination-in-code, iykyk 🦋
  • src_offset — the src GPU address 👑
  • dst_offset — the dst GPU address 🌈
  • byte_count — how many bytes to xfer, literally the amount of stuff we're moving 📦
  • copy_flags — unused 😭 yeah babe it's just sitting there, vibing, doing nothing

🔥 DESCRIPTION 🔥

So basically: this copies GPU buffers using the DMA engine (VI). 🚀

It's used by the amdgpu ttm implementation to move pages if it's registered as the asic copy callback. That's the whole vibe check — it's a callback, so it only gets called when the setup says so 🧚

🦋 SEE ALSO 🦋

Kernel file ./drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c — the main character herself 💀

like a whole friend group honestly, all of them iconic in their own way 🫶💜

it lives in ./drivers/gpu/drm/amd/amdgpu — that's the neighborhood, bestie 🏡

alright that's the whole page!! brought to you by the Kernel API Manual, dated October 2026, and the page is literally called sdma_v2_4_emit_copy_buffer(9) — slay, go move some pages 💅✨🎀

📦 where this page comes from