sdma_v4_0_ring_emit_fence(9)

📦 version 7.3.1, in nixpkgs unstable

💅 sdma_v4_0_ring_emit_fence(9) ✨

okay so bestie, welcome to the Kernel API Manual entry for sdma_v4_0_ring_emit_fence — yes it's a mouthful, yes she's iconic, and yes we're gonna get through it together. grab a strawberry drink 🍓 and let's go.

🌸 NAME 🌸

sdma_v4_0_ring_emit_fence — the girl who emits a fence on the DMA ring. that's it. that's the whole job. 💅

🦋 SYNOPSIS 🦋

void sdma_v4_0_ring_emit_fence (struct amdgpu_ring *ring , u64 addr ,
       u64 seq , unsigned flags );

like, she returns void — no little gift back, she just does the thing. main character energy, honestly. 👑

🎀 ARGUMENTS 🎀

  • ring — the amdgpu ring pointer, aka the venue where all the action happens 💖
  • addr — the address, literally where stuff lives 🏠
  • seq — the sequence number, the vibe check number if you will ✨
  • flags — fence related flags, the little accessories that change the fit 🎀

🔥 DESCRIPTION 🔥

so what does she actually do? okay so — she adds a DMA fence packet</> to the ring so the fence seq number gets written, and she also drops a DMA trap packet</> in there to generate an interrupt if needed. the whole glow-up is specifically for VEGA10. no cap, that's the tea. 🍵✨

iykyk — this is the kind of low-level ring manipulation that keeps your GPU talking to your kernel. treat her with respect. 🫶

👑 SEE ALSO 👑

the whole friend group, fr fr — go say hi:

that's the whole page bestie, you ate that 🫶✨ mwah 💋

sign-off time: this little love letter lives in ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and goes by the stage name sdma_v4_0_ring_emit_fence(9). periodt. 💅🎀

📦 where this page comes from