cayman_dma_resume(9)

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

okay so bestie, welcome to the cayman_dma_resume(9) page — yes that's the manual name, and yes it's giving "niche kernel lore that actually eats." this is the Kernel API Manual entry, and we're gonna get you comfy with it. no cap. 🫶

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✨ NAME ✨

cayman_dma_resume — setup and start the async dma engines 💅

literally what it says: it sets things up, then starts the async dma engines. iconic behavior.

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🦋 SYNOPSIS 🦋

int cayman_dma_resume (struct radeon_device *rdev );

that's the whole vibe. it takes one argument and returns an int. keep the spacing exactly like that, bestie — rdev ); and all. don't come for me, that's just how it's written. 🎀

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🌸 ARGUMENTS 🌸

• rdev — a radeon_device pointer. that's it. that's the argument. she's a pointer to a radeon_device, and she's main character energy. 👑

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🔥 DESCRIPTION 🔥

so what does it do? it sets up the DMA ring buffers and enables them. (cayman-SI). periodt. 💅

and the return tea ☕: it returns 0 for success, and an error for failure. so like, 0 = slay, error = not slay. keep that in mind. 😭

bestie reminder: this is about the DMA ring buffers — set them up, enable them, done. no extra guesses, no invented lore. we stay factual. 🧚

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/radeon/ni_dma.c
• cayman_dma_get_rptr(9)
• cayman_dma_get_wptr(9)
• cayman_dma_set_wptr(9)
• cayman_dma_ring_ib_execute(9)
• cayman_dma_stop(9)
• cayman_dma_fini(9)
• cayman_dma_is_lockup(9)
• cayman_dma_vm_copy_pages(9)
• cayman_dma_vm_write_pages(9)
• cayman_dma_vm_set_pages(9)
• cayman_dma_vm_pad_ib(9)

like, go read those too if you wanna complete the syllabus. iykyk. 📚✨

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and that's the page, bestie!! 🎀 source/version vibes come from ./drivers/gpu/drm/radeon, dated October 2026, and this whole manual moment is cayman_dma_resume(9). mwah 💋✨