STRUCT DFL_AFU_DMA_REGION(9)

💖 struct dfl_afu_dma_region(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — this is literally the page for struct dfl_afu_dma_region, no cap 🫶

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🌸 NAME 🌸

struct dfl_afu_dma_region — the afu DMA region data structure, and yes it's as iconic as it sounds 💅

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🦋 SYNOPSIS 🦋

struct dfl_afu_dma_region {
    u64 user_addr;
    u64 length;
    u64 iova;
    struct page **pages;
    struct rb_node node;
    bool in_use;
 };

like… look at her. main character struct energy fr fr 👑

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🎀 Members 🎀

okay so let's meet the cast, one field at a time 💖

• user_addr — the region's userspace virtual address. that's the address the user side sees, bestie 🫶
• length — how long the region is. the region length. periodt ✨
• iova — the region's IO virtual address. yep, IO virtual address, that's the vibe 🌈
• pages — a ptr to the pages of this region. literally a pointer, pointing at pages, doing pointer things 🧚
• node — the rb tree node. she's a node in an rb tree, that's her whole job 🌸
• in_use — a flag to indicate if this region is in_use. flag check time, bestie 💀

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⭐ SEE ALSO ⭐

go look at these too, no cap 👀 — the Kernel file ./drivers/fpga/dfl-afu.h, plus struct dfl_afu_mmio_region(9) and struct dfl_afu(9) 💜

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lowkey a reminder that this page lives under ./drivers/fpga in the kernel, so that's where you go if you wanna snoop 🕵️‍♀️

okay bye bestie, love u, go read the source 💅

🌈 that's the whole page 🌈 — from ./drivers/fpga, dated October 2026, out of the Kernel API Manual, and yeah, this is struct dfl_afu_dma_region(9) signing off 🎀✨