snd_sgbuf_get_addr(9)

✨ snd_sgbuf_get_addr(9) ✨

okay so this is a page from the Kernel API Manual, and bestie, it is short but it absolutely delivers. Let's get into it 💅

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🌸 NAME 🌸

snd_sgbuf_get_addr — literally just hands you the physical address at the matching offset. that's the whole job. iconic, honestly 🎀

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🦋 SYNOPSIS 🦋

dma_addr_t snd_sgbuf_get_addr (struct snd_dma_buffer *dmab , size_t
offset );

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💖 ARGUMENTS 💖

• dmab — the buffer allocation info. like, everything you need to know about how this buffer got allocated 🫶
• offset — the offset within the ring buffer. yes, the ring buffer specifically, not just any buffer, iykyk ✨

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⭐ RETURN ⭐

it gives you back the physical address. that's it. that's the return value. slay 💅

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🔥 SEE ALSO 🔥

this is the kernel file ./sound/core/memalloc.c, and it comes with a whole friend group 😭 go check out:

• snd_dma_alloc_dir_pages(9)
• snd_dma_alloc_pages_fallback(9)
• snd_dma_free_pages(9)
• snd_devm_alloc_dir_pages(9)
• snd_dma_buffer_mmap(9)
• snd_dma_buffer_sync(9)
• snd_sgbuf_get_page(9)
• snd_sgbuf_get_chunk_size(9)

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lowkey a whole squad of dma helpers, and snd_sgbuf_get_addr is out here doing one (1) thing and doing it well 💀 no cap

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and that's the page, bestie! this one lives in ./sound/core, version October 2026, and it's part of the Kernel API Manual 🌈 so go forth and get those physical addresses 🧚‍♀️💜