r600_dma_fini(9)

📦 version 7.3.1, in nixpkgs unstable

💅 r600_dma_fini — like, the Kernel API Manual entry, bestie ✨

okay so picture this: we're deep in the kernel docs, section 9, and the star of the show is r600_dma_fini. she's the one who shows up at the end of the party and turns the lights off. iconic behaviour, honestly 🎀

🌸 NAME 🌸

r600_dma_fini — tear down the async dma engine 🫶

like, she dismantles it. the async dma engine? yeah, it's done, it's wrapping up, it's going home 😭

⭐ SYNOPSIS ⭐

void r600_dma_fini (struct radeon_device *rdev );

no cap, that's the whole signature. void in, void out — she returns nothing because she's mysterious like that 💅

🦋 ARGUMENTS 🦋

  • rdev — a radeon_device pointer. literally just the radeon device pointer, that's it, that's the whole vibe 🍓

✨ DESCRIPTION ✨

Stop the async dma engine and free the ring 💀✨ — and yes bestie, that's the r6xx-through-evergreen generation, so if your hardware falls in that window, this is your girl.

so: the async dma engine gets stopped, and the ring gets freed. both things. in that order, presumably, because that's how it's written and we don't invent facts around here 🙈

lowkey important: this is a tear down function — she's the fini to somebody's init, the goodbye to somebody's hello. do not expect the engine to be usable after this. that's the whole point, bestie 😭

🧚 SEE ALSO 🧚

the kernel file lives at ./drivers/gpu/drm/radeon/r600_dma.c — go read it, iykyk 📖 and while you're in there, here's the whole friend group:

👑 the sign-off 👑

that's a wrap, bestie 💖 this one lives over in ./drivers/gpu/drm/radeon, dated October 2026 — yes, that October 2026, she's from the future and she's still tearing down dma engines. main character energy fr fr 🌈⭐

periodt. go free that ring. 🎀

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