snd_dma_program(9)

💖 NAME 💖

snd_dma_program — the one where you program an ISA DMA transfer ✨

(and yes bestie, this is the <pink>Kernel API Manual</pink>, section 9, we're in the deep end of the pool and honestly? slay.)

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🌸 SYNOPSIS 🌸

void snd_dma_program (unsigned long dma , unsigned long addr , unsigned int size , unsigned short mode );

Like, that's the whole vibe. It's a void function — nothing gets handed back to you, it just does the thing 💅

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🦋 ARGUMENTS 🦋

• dma — the dma number. literally just which DMA you're talking to 🎀
• addr — the physical address of the buffer. physical, okay? not your cute little virtual pointer, the physical one 🫶
• size — the DMA transfer size, an unsigned int
• mode — the DMA transfer mode, written as DMA_MODE_XXX 🌈

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✨ DESCRIPTION ✨

Okay so hear me out: this function programs an ISA DMA transfer for the given buffer. That's it. That's the whole description. Short, iconic, no notes 💀

It takes your dma number, the physical addr of your buffer, the size of the transfer and the mode (DMA_MODE_XXX, iykyk) and sets up the ISA DMA transfer for that buffer. Main character energy, zero return value, we love a lowkey legend 👑

ngl the manpage keeps it very brief here, so I'm not gonna sit here and invent lore that isn't in the source. Take the facts, take the vibe, go forth 🧚

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⭐ SEE ALSO ⭐

• Kernel file ./sound/core/isadma.c — the source, go read her 📖
• snd_dma_disable(9)
• snd_dma_pointer(9)
• snd_devm_request_dma(9)

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okay that's the page!! mwah 💜

This little love letter lives under ./sound/core in the tree, dated October 2026, and it goes by snd_dma_program(9) — catch you in the kernel, bestie 🎀💖🦋