STRUCT NBPF_DESC(9)

💅 struct nbpf_desc 💅

okay so this page lives in the Kernel API Manual (yes, that's the manual name, we're fancy now ✨) and it's all about struct nbpf_desc — literally the DMA transfer descriptor, no cap 🫶

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🌸 NAME 🌸

struct nbpf_desc — the DMA transfer descriptor. that's it, that's the whole vibe. a little struct with a big job 💖

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✨ SYNOPSIS ✨

struct nbpf_desc {
    struct dma_async_tx_descriptor async_tx;
    bool user_wait;
    size_t length;
    struct nbpf_channel *chan;
    struct list_head sg;
    struct list_head node;
 };

like, look at her. six fields. main character energy fr fr 👑

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🎀 Members 🎀

• async_tx — the dmaengine object. the actual engine-y part, she's the plug 🔌
• user_wait — a bool that says we're waiting for a user ack. yes bestie, we're on read until they respond 🙈
• length — the total transfer length, size_t and everything. how much we're moving, iconic 💫
• chan — the associated DMAC channel, a struct nbpf_channel *. her assigned channel, iykyk 🦋
• sg — a struct list_head that's the list of hardware descriptors, represented by struct nbpf_link_desc. not the scatterlist itself, the list of hardware descriptors — read it carefully babe, there will be a quiz 📝
• node — a struct list_head that's this struct's member in channel descriptor lists. she's on the list, literally 💅

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/dma/nbpfaxi.c
• struct nbpf_channel(9) — go read it next, it's giving sequel energy 🎬

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lowkey reminder: this is kernel API docs, so like… the details matter. every field, every type, every pointer. slay responsibly 💀

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and that's the whole thing bestie, hope it ate 💖 this was ./drivers/dma, October 2026, struct nbpf_desc(9) — mwah, see u in the next manpage 🧚‍♀️⭐