snd_dma_buffer_mmap(9)

💅 snd_dma_buffer_mmap 💅

okay so bestie, welcome to the Kernel API Manual ✨ — this one's all about snd_dma_buffer_mmap, and it's literally the function that does the mmap of the given DMA buffer. no cap, that's the whole vibe. 🎀

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✨ NAME ✨

snd_dma_buffer_mmap — perform mmap of the given DMA buffer 🦋

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🌸 SYNOPSIS 🌸

int snd_dma_buffer_mmap (struct snd_dma_buffer *dmab , struct
vm_area_struct *area );

like yes, it's two args, it returns an int, and it's living in kernel land so you already know it can be mad at you. 💀

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💖 ARGUMENTS 💖

• dmab — buffer allocation information 🫶 this is the DMA buffer gossip, the whole "what got allocated where" situation.
• area — VM area information 🌈 the virtual memory area tea, iykyk.

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🔥 RETURN 🔥

zero if successful, or a negative error code 😭 so like, 0 = slay, negative = not slay. fr fr, check it.

⭐ heads up bestie: negative error code means something went sideways — don't just ignore the return value and act surprised later. 🙈

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🧚 SEE ALSO 🧚

Kernel file ./sound/core/memalloc.c plus the whole friend group 👑

• 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_sync(9)
• snd_sgbuf_get_addr(9)
• snd_sgbuf_get_page(9)
• snd_sgbuf_get_chunk_size(9)

like, read those too, they're all in their main character era. 💜

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and that's the page!! 🎀 brought to you by ./sound/core, dated October 2026, all under the glamorous name of snd_dma_buffer_mmap(9) — mwah, go mmap something responsibly bestie 💅💖