drm_gem_prime_export(9)

✨ drm_gem_prime_export(9) ✨

okay so bestie, welcome to the Kernel API Manual 💅 — today we're looking at drm_gem_prime_export, and honestly? it's giving "small function, big responsibilities." Let's get into it 🎀

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🌸 NAME 🌸

drm_gem_prime_export — the helper library's implementation of the export callback, no cap 🫶

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⭐ SYNOPSIS ⭐

struct dma_buf * drm_gem_prime_export (struct drm_gem_object *obj , int
flags );

like, that's the whole signature. short and iconic ✨

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🦋 ARGUMENTS 🦋

• obj — the GEM object we're exporting, bestie. that's the one 🎀
• flags — flags like DRM_CLOEXEC and DRM_RDWR 💫

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💖 DESCRIPTION 💖

So this is the implementation of the drm_gem_object_funcs.export functions for GEM drivers that are using the PRIME helpers. periodt.

It gets used as the default in drm_gem_prime_handle_to_fd — so if you're a GEM driver riding with the PRIME helpers, this is lowkey the one doing the work for you 👑

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🔥 SEE ALSO 🔥

• the Kernel file ./drivers/gpu/drm/drm_prime.c overview and lifetime rules(9)
• drm_gem_dmabuf_export(9)
• drm_gem_dmabuf_release(9)
• drm_gem_prime_fd_to_handle(9)
• drm_gem_prime_handle_to_dmabuf(9)
• drm_gem_prime_handle_to_fd(9)
• PRIME Helpers(9)
• drm_gem_map_attach(9)
• drm_gem_map_detach(9)
• drm_gem_map_dma_buf(9)
• drm_gem_unmap_dma_buf(9)
• drm_gem_dmabuf_vmap(9)
• drm_gem_dmabuf_vunmap(9)
• drm_gem_prime_mmap(9)
• drm_gem_dmabuf_mmap(9)
• drm_prime_pages_to_sg(9)
• drm_prime_get_contiguous_size(9)
• drm_gem_is_prime_exported_dma_buf(9)
• drm_gem_prime_import_dev(9)
• drm_gem_prime_import(9)
• drm_prime_sg_to_page_array(9)
• drm_prime_sg_to_dma_addr_array(9)
• drm_prime_gem_destroy(9)

like, that's a whole friend group right there 😭 go read them, iykyk 💜

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✨ sign-off time ✨

this lil page lives in ./drivers/gpu/drm, dated October 2026 — and it's the drm_gem_prime_export(9) page, obviously 💅 bye bestie, go export something iconic 🌈👑