STRUCT SG204X_MSI_CHIPDATA(9)

💅 struct sg204x_msi_chipdata(9) 💅

ok so bestie, welcome to the Kernel API Manual, section 9 — we're talking about struct sg204x_msi_chipdata, which is literally the chip data for the SG204x MSI IRQ controller. no cap, that's the whole vibe. 🦋

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✨ NAME ✨

struct sg204x_msi_chipdata — chip data for the SG204x MSI IRQ controller. that's it, that's the queen. 👑

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🌸 SYNOPSIS 🌸

struct sg204x_msi_chipdata {
    void __iomem                            *reg_clr;
    phys_addr_t doorbell_addr;
    u32 irq_first;
    u32 num_irqs;
    unsigned int                            irq_type;
    unsigned long                           *msi_map;
    struct mutex                            msi_map_lock;
    const struct sg204x_msi_chip_info       *chip_info;
 };

like… look at her. every field accounted for, not one dropped. we love a complete struct. 🫶

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🎀 Members 🎀

• reg_clr — the clear reg, ok? go look at the TRM, 10.1.33, GP_INTR0_CLR. iykyk 📖
• doorbell_addr — this one's the doorbell 🔔, see the TRM, 10.1.32, GP_INTR0_SET.
• irq_first — the first vectors number that MSIs starts. that's where the party begins ✨
• num_irqs — number of vectors for MSIs. like, how many seats are at the table 💺
• irq_type — the IRQ type for MSIs. the whole personality of the interrupt, honestly 💅
• msi_map — the mapping for allocated MSI vectors. ur lil map of who got which vector 🗺️
• msi_map_lock — the lock for msi_map. yes bestie, we lock it, we do NOT rawdog shared state 🔒
• chip_info — chip specific infomations. (that's the original spelling and i'm keeping it fr fr, no editing the source material 🙈)

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💜 SEE ALSO 💜

• Kernel file ./drivers/irqchip/irq-sg2042-msi.c — go read it, it's giving main character energy 🔥

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ok that's the whole page, nothing skipped, nothing invented. if u use this struct wrong that's on u, not me 😭

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sign-off time 🎀 — this was ./drivers/irqchip, dated October 2026, from the Kernel API Manual, and the page is literally called struct sg204x_msi_chipdata(9). slay, bye 💖✨