STRUCT MTK_HSDMA_PCHAN(9)

💖 struct mtk_hsdma_pchan(9) — the Kernel API Manual, bestie edition 💖

Okay so bestie, welcome to the struct mtk_hsdma_pchan(9) page in the Kernel API Manual ✨ — this is the one about the struct holding info describing physical channel (PC). Yes, PC like physical channel, not personal computer, don't get it twisted 💅

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🌸 NAME 🌸

struct mtk_hsdma_pchan — literally the struct that holds all the info describing a physical channel (PC). That's it, that's the vibe 🎀

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🦋 SYNOPSIS 🦋

struct mtk_hsdma_pchan {
    struct mtk_hsdma_ring ring;
    size_t sz_ring;
    atomic_t nr_free;
 };

Look at her. Iconic. Three members, zero notes 💜

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👑 Members 👑

• ring — an instance for the underlying ring ✨
• sz_ring — the total size allocated for the ring. Big "how much room do we actually have" energy 💅
• nr_free — the total number of free rooms in the ring. And bestie, listen: this one gets accessed and updated frequently between IRQ context and user context, all so it can reflect whether the ring can accept requests from VD 👀 That's a lot of pressure on one atomic_t, honestly. Main character energy fr fr 🔥

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🧚 SEE ALSO 🧚

Kernel file ./drivers/dma/mediatek/mtk-hsdma.c, plus the whole crew — the struct squad, if you will 😭🫶

• struct mtk_hsdma_pdesc(9)
• struct mtk_hsdma_vdesc(9)
• struct mtk_hsdma_cb(9)
• struct mtk_hsdma_ring(9)
• struct mtk_hsdma_vchan(9)
• struct mtk_hsdma_soc(9)
• struct mtk_hsdma_device(9)

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Go read the whole family, bestie, they all link up 💖 No cap, iykyk 🌈

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That's the whole page!! Shoutout to ./drivers/dma/mediatek for being the home address 🏡, to October 2026 for the date stamp 🗓️, and to struct mtk_hsdma_pchan(9) for being the title of this whole lovely thing 👑 Slay, and see you in the next manpage, bestie! 💅✨🎀🦋🌸