amdgpu_gem_prime_import(9)

💅 amdgpu_gem_prime_import(9) ✨

okay so bestie, you found it — the amdgpu_gem_prime_import(9) page from the Kernel API Manual 🎀. It's short, it's sweet, it's giving "tiny function, big responsibilities", and we're gonna go through it together, no cap.

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🌸 NAME 🌸

amdgpu_gem_prime_import — literally the &drm_driver.gem_prime_import implementation. that's it, that's the whole name. it's the import half of the PRIME story, and yes, the export half is also in this family, keep scrolling 🫶

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🦋 SYNOPSIS 🦋

struct drm_gem_object * amdgpu_gem_prime_import (struct drm_device *dev
, struct dma_buf *dma_buf );

it returns a struct drm_gem_object *, takes two args, and tbh the signature is longer than the description. iconic behavior honestly 😭

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💖 ARGUMENTS 💖

• dev — the DRM device. your GPU's little home address, basically 🏠
• dma_buf — the shared DMA buffer. the thing being imported, the guest of honor 👑

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✨ DESCRIPTION ✨

so what does it do? it imports a dma_buf into the driver, and — key detail, don't skip it — it potentially creates a new GEM object. "potentially" is doing a lot of work in that sentence and we respect it 💅

bestie note: the description says potentially, so don't go assuming a fresh GEM object is guaranteed every single time. that's just what the page says, and we're not out here inventing facts 🔥

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⭐ RETURN ⭐

it hands you back the GEM BO that represents the shared DMA buffer for the given device. that's the whole vibe check result 🌈

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👑 SEE ALSO 👑

the kernel file is ./drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c — go read it if you're feeling main character energy. and here's the full friend group, no one left out:

• PRIME Buffer Sharing(9)
• dma_buf_attach_adev(9)
• amdgpu_dma_buf_attach(9)
• amdgpu_dma_buf_detach(9)
• amdgpu_dma_buf_pin(9)
• amdgpu_dma_buf_unpin(9)
• amdgpu_dma_buf_map(9)
• amdgpu_dma_buf_unmap(9)
• amdgpu_dma_buf_begin_cpu_access(9)
• amdgpu_gem_prime_export(9)
• amdgpu_dma_buf_create_obj(9)
• amdgpu_dma_buf_move_notify(9)
• amdgpu_dmabuf_is_xgmi_accessible(9)

like, the whole squad is here. attach, detach, pin, unpin, map, unmap, cpu access, export, create_obj, move_notify, xgmi accessibility — we love a complete cast 🌸

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and that's the page, bestie! written out of ./drivers/gpu/drm/amd/amdgpu in October 2026, and yeah, the manual name up top is amdgpu_gem_prime_import(9) — go forth and import those buffers fr fr 💜🎀✨