r600_dma_ring_test(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 r600_dma_ring_test(9) 🌸

okay so bestie, welcome to the Kernel API Manual — yes we're reading kernel docs together, this is our life now, and honestly? iconic. this page is r600_dma_ring_test(9) and it's a whole vibe 💅

✨ NAME ✨

r600_dma_ring_test — a simple async dma engine test 🎀

🦋 SYNOPSIS 🦋

int r600_dma_ring_test (struct radeon_device *rdev , struct radeon_ring *ring );

that's the whole signature, no cap. two args, returns an int, we move 💖

🌸 ARGUMENTS 🌸

  • rdev — a radeon_device pointer. literally just the radeon device, your main character 🫶
  • ring — a radeon_ring structure that's holding the ring information. she's holding the info for the ring, that's her job ✨

🔥 DESCRIPTION 🔥

so what does she do? she tests the DMA engine by writing — using the engine itself to write a value to memory. like, the engine writes the value, that's the test. the way that works is genuinely so satisfying ngl 🧚

this is for r6xx-SI btw, so keep that in mind 👑

and the returns: 0 for success, and an error for failure. that's it, that's the deal 💀

super simple, no drama — but if you get an error back, something in the DMA engine is not slaying and you should probably look into it 😭

🌈 SEE ALSO 🌈

kernel file ./drivers/gpu/drm/radeon/r600_dma.c — go read her, she's the source fr fr 📖

and the whole friend group 💜:

mwah 💋 this page lives in ./drivers/gpu/drm/radeon, and it was stamped October 2026 — so yeah, she's dated, she's official, she's r600_dma_ring_test(9) and she ate. periodt 🎀✨

📦 where this page comes from