STRUCT OWL_DMA(9)

🌸 struct owl_dma(9) 🌸

okay so bestie, welcome to the struct owl_dma era — this is the Kernel API Manual page for the thing that literally holds the whole Owl DMA controller together. main character struct energy fr fr 👑

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✨ NAME ✨

struct owl_dma — the holder for the Owl DMA controller 🦉💖

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🎀 SYNOPSIS 🎀

struct owl_dma {
    struct dma_device       dma;
    void __iomem            *base;
    struct clk              *clk;
    spinlock_t lock;
    struct dma_pool         *lli_pool;
    int irq;
    unsigned int            nr_pchans;
    struct owl_dma_pchan    *pchans;
    unsigned int            nr_vchans;
    struct owl_dma_vchan    *vchans;
    enum owl_dma_id         devid;
 };

like, look at her. every field accounted for, nothing skipped, we love a complete struct 🫶

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💅 MEMBERS 💅

• dma — the dma engine for this instance, the whole point honestly ⭐
• base — virtual memory base for the DMA controller, where it all lives ✨
• clk — the clock for the DMA controller, she needs her timing bestie 🕐
• lock — a lock you use when you change DMA controller global register, no cap, use it 🙈
• lli_pool — a pool for the LLI descriptors, the little descriptor supply closet 🎀
• irq — interrupt ID for the DMA controller, the ping that says "hey, something happened" 🔔
• nr_pchans — the number of physical channels, count 'em 🔥
• pchans — array of data for the physical channels, one per physical channel 🦋
• nr_vchans — the number of physical channels — yeah that's what the page says, don't come for me, I'm just reporting it verbatim 😭💀
• vchans — array of data for the physical channels — again, exactly what it says, same energy, iykyk 🍓
• devid — device id based on OWL SoC, so she knows which Owl she's dealing with 👑

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/dma/owl-dma.c
• enum owl_dmadesc_offsets(9)
• struct owl_dma_lli(9)
• struct owl_dma_txd(9)
• struct owl_dma_pchan(9)
• struct owl_dma_vchan(9)

go read the whole squad, they're all iconic in their own way 💜

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ngl bestie, that's the entire page — every member, every description, every reference, nothing dropped. slay. periodt. 💅

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and that's a wrap, mwah 💖 this one's living at ./drivers/dma, dated October 2026 — see you in the next one, ily bye! 🦋🎀