STRUCT MCHP_IPC_SBI_MSG(9)

💌 struct mchp_ipc_sbi_msg(9) — like, the IPC SBI payload message, bestie

okay so this is a page from the Kernel API Manual and it's literally all about struct mchp_ipc_sbi_msg, which is the IPC SBI payload message ✨ buckle up, it's short but it's iconic.

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🌸 NAME 🌸

struct mchp_ipc_sbi_msg — IPC SBI payload message 💅

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✨ SYNOPSIS ✨

here's the whole vibe, copy-pasted straight from the source because we do not paraphrase code in this house:

struct mchp_ipc_sbi_msg {
    u64 buf_addr;
    u16 size;
    u8 irq_type;
 };

three members. that's it. that's the whole struct. lowkey obsessed with how tidy it is 🎀

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🧚 Members 🧚

• buf_addr — the physical address where the received data should be copied to. like, that's the destination, bestie, that's where the goods go 📦
• size — the maximum size (in bytes) that can be stored in the buffer pointed to by buf. so it's the capacity check, the "don't overflow me please" number 🙈
• irq_type — a mask representing the irq types that triggered an irq. it's giving "which interrupt woke me up" energy ⚡

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💖 Description 💖

so this struct is the one used by the SBI_EXT_IPC_SEND/SBI_EXT_IPC_RECEIVE SBI function ids to send/receive a message from an associated processor using the IPC 🫶

that's the whole description. it's a payload struct, it does payload struct things, and honestly? main character energy for such a small struct. periodt 💅

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🦋 SEE ALSO 🦋

• the kernel file ./drivers/mailbox/mailbox-mchp-ipc-sbi.c — yes, the whole path, go read it, iykyk 👀
• struct mchp_ipc_mbox_info(9)
• struct mchp_ipc_init(9)
• struct mchp_ipc_status(9)

go click through those, they're the friend group this struct rolls with 🌈

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ngl if you're poking at mailbox stuff on MCHP hardware, this is your girl. no cap, keep the size honest or the vibes (and the buffers) get wrecked 💀

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and that's the page!! mwah 💋 this lil number lives in ./drivers/mailbox, dated October 2026, and it's filed under struct mchp_ipc_sbi_msg(9) — catch you in the next manpage, bestie 🎀✨💜