amdgpu_door...el_doorbells(9)

✨ NAME ✨

okay so bestie, welcome to the manual page for amdgpu_door...el_doorbells(9) — yes that's the actual truncated name, she's serving mystery 💅 — and the function we're hyping up is amdgpu_doorbell_create_kernel_doorbells: the one that creates kernel doorbells for graphics. that's it, that's the whole vibe 🎀

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🌸 SYNOPSIS 🌸

int amdgpu_doorbell_create_kernel_doorbells (struct amdgpu_device *adev
);

like literally that's the whole call. one argument, one int back, no drama 🦋

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💖 ARGUMENTS 💖

• adev — an amdgpu_device pointer. that's the whole personality. she points at your amdgpu device and that's all she needs 🫶

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🔥 DESCRIPTION 🔥

so what does it do?? it creates doorbells for graphics driver usages. doorbells!! for the graphics driver!! iconic behaviour, no cap 👑

and the return situation, because we always check the return value in this house:

• returns 0 on success 🎉
• returns an error otherwise 😭 (yes, "error otherwise" — the manpage said it, I'm just relaying the message, don't shoot the messenger 💀)

ngl bestie, always check that return value. 0 means slay, anything else means something went sideways and you gotta deal with it. periodt.

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🦋 SEE ALSO 🦋

the kernel file living its best life at ./drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c, plus the whole friend group of related functions — go give them a read, iykyk:

• amdgpu_mm_rdoorbell(9)
• amdgpu_mm_wdoorbell(9)
• amdgpu_mm_rdoorbell64(9)
• amdgpu_mm_wdoorbell64(9)
• amdgpu_doorbell_index_on_bar(9)
• amdgpu_doorbell_init(9)
• amdgpu_doorbell_fini(9)

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that's the whole page bestie, hope you feel enlightened 🌈✨ this lil beauty ships out of ./drivers/gpu/drm/amd/amdgpu and is dated October 2026 — so go forth, create those kernel doorbells for graphics, and stan the return value 💜🎀🌸