STRUCT DFL_AFU_MMIO_REGION(9)

💅 struct dfl_afu_mmio_region(9) — the kernel API manual, bestie edition ✨

okay so picture this: you're deep in the kernel API manual, section 9, and you've stumbled onto struct dfl_afu_mmio_region — literally the data structure that holds all the tea about an AFU's mmio region 🎀. Yeah. That one. Let's get into it.

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🌸 NAME 🌸

struct dfl_afu_mmio_region — the afu mmio region data structure. that's her. that's the whole vibe. 👑

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✨ SYNOPSIS ✨

here's the glow-up in code form, copied exactly because we do not edit source in this house 🫶:

struct dfl_afu_mmio_region {
    u32 index;
    u32 flags;
    u64 size;
    u64 offset;
    u64 phys;
    struct list_head node;
};

look at that struct. main character energy, honestly. 🌈

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💖 Members 💖

every single field, no skips, no cuts — the way that a struct deserves a full breakdown fr fr:

• index — the region index. it's giving "which one am I" 🦋.
• flags — the region flags, aka the access permission situation. this is where she tells you what she's allowed to do 💅.
• size — the region size. how much space she's taking up, and honestly same 😭.
• offset — the region offset from the start of the device fd. important detail, don't lose it, iykyk.
• phys — the region's physical address. her actual real-world location, no cap 📍.
• node — the node you use to add her to the afu feature dev's region list. she's a linked-list girlie now 🔗.

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🦋 SEE ALSO 🦋

go read these next, bestie, they're literally in the kernel file ./drivers/fpga/dfl-afu.h:

• struct dfl_afu_dma_region(9)
• struct dfl_afu(9)

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lowkey a reminder: this is a data structure page, so the whole plot is the members list. don't skip offset being measured from the start of the device fd — that's the detail that'll get you at 2am 🕑💀.

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and that's the page!! mwah 💋 sign-off time: this slay of a manpage lives in ./drivers/fpga, dated October 2026, and it's filed under struct dfl_afu_mmio_region(9) — periodt. go forth and mmio responsibly 👑💜