dma_buf_map...ent_unlocked(9)

💅 dma_buf_map_attachment_unlocked(9) — from the Kernel API Manual, bestie ✨

okay so picture this: it's a kernel API manual page, the vibe is immaculate, and the function is dma_buf_map_attachment_unlocked. yes that's a mouthful, no we're not changing it, it's iconic and it's staying. 🎀

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🌸 NAME 🌸

dma_buf_map_attachment_unlocked — Returns the scatterlist table of the attachment; mapped into _device_ address space. Is a wrapper for map_dma_buf() of the dma_buf_ops.

like literally, that's the whole job. it hands you the scatterlist table, mapped into _device_ address space, and under the hood it's just wrapping map_dma_buf() from the dma_buf_ops. slay. 💅

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✨ SYNOPSIS ✨

struct sg_table * dma_buf_map_attachment_unlocked (struct
dma_buf_attachment *attach , enum dma_data_direction direction );

look at her go. returns a struct sg_table *, takes a struct dma_buf_attachment *attach and an enum dma_data_direction direction. copy it exactly, don't freestyle, i'm begging 🫶

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🦋 ARGUMENTS 🦋

• attach — [in] attachment whose scatterlist is to be returned 🌈
• direction — [in] direction of DMA transfer 🌸

two args, both [in], both doing their little part. main character energy from both of them honestly.

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💖 DESCRIPTION 💖

Unlocked variant of dma_buf_map_attachment.

that's it. that's the description. it's the unlocked version, periodt. 🔥

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👑 SEE ALSO 👑

okay the friend group is LARGE and honestly every one of them is a baddie, let's do the roll call 🎀

Kernel file ./drivers/dma-buf/dma-buf.c — the source file, the mothership 💜

• dma_buf_iter_begin(9)
• dma_buf_iter_next(9)
• implicit fence polling(9)
• dma_buf_set_name(9)
• dma buf device access(9) ← yes, that one's spelled with a space, not an underscore, don't come for me, that's literally how it's written 🙈
• dma_buf_export(9)
• dma_buf_fd(9)
• dma_buf_fd_install(9)
• dma_buf_get(9)
• dma_buf_put(9)
• locking convention(9)
• dma_buf_dynamic_attach(9)
• dma_buf_attach(9)
• dma_buf_detach(9)
• dma_buf_pin(9)
• dma_buf_unpin(9)
• dma_buf_map_attachment(9)
• dma_buf_unmap_attachment(9)
• dma_buf_unmap_attachment_unlocked(9)
• dma_buf_attach_revocable(9)
• dma_buf_invalidate_mappings(9)
• cpu access(9)
• dma_buf_begin_cpu_access(9)
• dma_buf_end_cpu_access(9)
• dma_buf_mmap(9)
• dma_buf_vmap(9)
• dma_buf_vmap_unlocked(9)
• dma_buf_vunmap(9)
• dma_buf_vunmap_unlocked(9)

that's the whole squad, no cap. go read them, they ate. ⭐

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and that's the page!! 🧚 this absolute gem lives in ./drivers/dma-buf, dated October 2026 — so yeah, she's from the future, lowkey. bye bestie, go map some attachments (the unlocked way) 💖✨🍓