sdma_v7_1_vm_copy_pte(9)

📦 version 7.3.1, in nixpkgs unstable

💖 sdma_v7_1_vm_copy_pte(9) — the Kernel API Manual glow-up 🎀

okay bestie, so this is a page from the Kernel API Manual, and it's about one very specific little function living out its main character era in the AMDGPU sDMA world. Let's get into it ✨

✨ NAME ✨

sdma_v7_1_vm_copy_pte — literally the function that updates PTEs by copying them from the GART 🦋

🌸 SYNOPSIS 🌸

void sdma_v7_1_vm_copy_pte (struct amdgpu_ib *ib , uint64_t pe ,
       uint64_t src , unsigned count );

that's the whole signature, no cap. void return, four arguments, very demure, very mindful 💅

🫶 ARGUMENTS 🫶

  • ib — the indirect buffer to fill with commands, like it's the little canvas you're painting your sDMA commands onto 🎨
  • pe — addr of the page entry, i.e. where the page entry lives
  • src — the src addr to copy from, the place we're sourcing the good stuff from
  • count — number of page entries to update, so how many PTEs are getting their moment 🔥

💜 DESCRIPTION 💜

Update PTEs by copying them from the GART using sDMA. that's it, that's the whole vibe — the page entries get refreshed by copy, and the copy is done by sDMA. iconic behavior honestly 👑

🌈 SEE ALSO 🌈

bestie, the cross-reference list here is LONG and we are respecting every single one of them, in order, because these are all her sisters:

  • Kernel file ./drivers/gpu/drm/amd/amdgpu/sdma_v7_1.c 📁

and then the whole friend group:

like, that's the entire roster and she knows all of them by name 💖

real talk: this page is literally just the one-liner behaviour and the argument list — no hidden options, no env vars, no exit statuses, no bug notes. what you see is what you get, fr fr 🙈

and that's the page!! 🧚 the source lives in ./drivers/gpu/drm/amd/amdgpu and this edition is dated October 2026 — so yeah, mark your calendars bestie, mwah 💋⭐🍓

📦 where this page comes from