drm_prime_g...tiguous_size(9)

💖 drm_prime_g...tiguous_size(9) 💖

okay so this is a page straight out of the Kernel API Manual, bestie — yes it's a real manual, no it's not the kind you read for fun, but we're gonna make it fun anyway 🫶

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✨ NAME ✨

drm_prime_get_contiguous_size — literally returns the contiguous size of the buffer 💅 that's it that's the whole vibe

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🌸 SYNOPSIS 🌸

unsigned long drm_prime_get_contiguous_size (struct sg_table *sgt );

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🎀 ARGUMENTS 🎀

• sgt — the sg_table that describes the buffer you wanna check, bestie. this is the thing that's getting inspected. it's giving "receipts" energy 🧾

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🦋 DESCRIPTION 🦋

okay so here's the tea ☕ — this little helper calculates the contiguous size in the DMA address space of the buffer that's described by the sg_table you handed it. no cap, that's its whole job.

and why do we care?? because this is useful for implementing drm_gem_object_funcs.gem_prime_import_sg_table, that's why 💫 so if you're sitting there like "when would i even need this" — that's when. iconic use case, honestly 👑

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💜 SEE ALSO 💜

the whole friend group, in the order the page says it, because we don't do favorites here 🫶

• 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_gem_prime_export(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)

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lowkey obsessed with how many cross-references that is. go read the links, bestie, iykyk 📚✨

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and that's a wrap, gorgeous 💖 this page lives under ./drivers/gpu/drm and it's dated October 2026 — so if you ever need to cite it, that's the receipt 🧾 slay, bye 👋🌈