STRUCT IRIS_BUFFER(9)

💅 struct iris_buffer(9) — a Kernel API Manual moment

okay so bestie, buckle up 💖 we're looking at struct iris_buffer from the Kernel API Manual and honestly it's giving "kernel driver glow-up". It's a struct page, so there's literally no prose description after the dash in the NAME — she's a mystery, an icon, a struct with no subtitle. Periodt.

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✨ NAME ✨

struct iris_buffer — (and that's it, no description, she said "my name is enough" 💅)

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📜 SYNOPSIS 📜

struct iris_buffer {
    struct vb2_v4l2_buffer          vb2;
    struct list_head                list;
    struct iris_inst                *inst;
    enum iris_buffer_type           type;
    u32 index;
    int fd;
    size_t buffer_size;
    u32 data_offset;
    size_t data_size;
    dma_addr_t device_addr;
    void *kvaddr;
    unsigned long                   dma_attrs;
    u32 flags;
    u64 timestamp;
    enum iris_buffer_attributes     attr;
 };

no cap, that's the whole shape of her 🦋

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🌸 Members 🌸

bestie these are the fields, and every single one is doing main character energy in her own lane:

• vb2 — the v4l2 vb2 buffer 🎀
• list — list head for the iris_buffers structure
• inst — iris instance structure
• type — enum for type of iris buffer
• index — identifier for the iris buffer
• fd — file descriptor of the buffer
• buffer_size — accessible buffer size in bytes starting from addr_offset
• data_offset — accessible buffer offset from base address
• data_size — data size in bytes
• device_addr — device address of the buffer
• kvaddr — kernel virtual address of the buffer
• dma_attrs — dma attributes
• flags — buffer flags. It is represented as bit masks ⭐
• timestamp — timestamp of the buffer in nano seconds (ns)
• attr — enum for iris buffer attributes

like, fifteen fields and not one of them is filler. we love a structured queen 👑

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🔍 SEE ALSO 🔍

• Kernel file ./drivers/media/platform/qcom/iris/iris_buffer.h enum iris_buffer_type(9)

go read those too, iykyk 🫶

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lowkey a note to self: the accessible size in buffer_size is measured starting from addr_offset, and flags is bit masks — keep that in mind, bestie, don't come for me 😭

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and that's the whole page, bestie!! 🎀🦋✨ this cutie came from ./drivers/media/platform/qcom/... and she's dated October 2026 — a struct so far ahead of her time she's basically time travelling 💜🌷 see u in the next manpage, mwah 💋