r600_dma_ib_test(9)

💅 r600_dma_ib_test — like, the whole glow-up ✨

okay bestie, so this is a page from the Kernel API Manual (yes, the Kernel API Manual, she's fancy 🎀) and it's all about r600_dma_ib_test. Buckle up, it's short but she's iconic. 🦋

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🌸 NAME 🌸

r600_dma_ib_test — the girl who tests an IB on the DMA engine. no cap, that's literally the whole job. 💖

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✨ SYNOPSIS ✨

int r600_dma_ib_test (struct radeon_device *rdev , struct radeon_ring
*ring );

like… she takes two things and gives you back an int. simple. elegant. main character energy. 👑

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🫶 ARGUMENTS 🫶

• rdev — a radeon_device pointer. that's your device bestie, she's holding all the context 💜
• ring — a radeon_ring structure holding ring information. yes, she's the one carrying the ring lore 💅

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🔥 DESCRIPTION 🔥

so what does she actually do? she tests a simple IB in the DMA ring — and before you ask, that's r6xx-SI territory, iykyk. 🌈

Returns 0 on success, and an error on failure. that's it, that's the vibe check. if you get 0 she ate and left no crumbs; if you get an error… well 😭 at least she told you. 💀

ngl, this description is short but she's honest about it. no hidden features, no secret behaviour — test the IB, report back, periodt. ⭐

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🧚 SEE ALSO 🧚

okay this is the part where she introduces you to the whole friend group 🫶 — first the Kernel file:

./drivers/gpu/drm/radeon/r600_dma.c

and then, like, everyone:

• r600_dma_get_rptr(9)
• r600_dma_get_wptr(9)
• r600_dma_set_wptr(9)
• r600_dma_stop(9)
• r600_dma_resume(9)
• r600_dma_fini(9)
• r600_dma_is_lockup(9)
• r600_dma_ring_test(9)
• r600_dma_fence_ring_emit(9)
• r600_dma_semaphore_ring_emit(9)
• r600_dma_ring_ib_execute(9)
• r600_copy_dma(9)

go say hi to them, they're all lovely 💖✨

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🎀 tiny sign-off from your girl 🎀 this lil page lives under ./drivers/gpu/drm/radeon and she was dated October 2026. that's the source, the version, and the date all in one cute little bow. obsessed. 🌸💅🦋