STRUCT SCMI_CHAN_INFO(9)

💅 struct scmi_chan_info(9) — the kernel API manual, bestie edition ✨

Okay so picture this: it's a struct scmi_chan_info, right? It's literally the structure that represents a SCMI channel's information. That's the whole vibe. One channel, one lil info bundle, main character energy 🎀

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🌸 SYNOPSIS 🌸

Like, here's the shape of it, no cap, copy it exactly:

struct scmi_chan_info {
    int id;
    struct device *dev;
    bool is_p2a;
    unsigned int rx_timeout_ms;
    unsigned int max_msg_size;
    struct scmi_handle *handle;
    bool no_completion_irq;
    void *transport_info;
 };

(Yes there's an extra lil space before that closing brace in the original. We respect it. It's iconic. 💅)

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✨ Members ✨

Girl. Let's go through them one by one, because every single field matters:

• id — an identifier for this channel 💖 and get this: it matches the protocol number used to initialize this channel. So it's not just some random number, it's a whole identity, iykyk.
• dev — a reference to the device in the SCMI hierarchy that corresponds to this channel. Your channel's home address, basically 🏠
• is_p2a — a flag that tells you whether a channel is P2A (RX). Just a bool doing bool things, slaying as always ⭐
• rx_timeout_ms — the configured RX timeout, measured in milliseconds. Tick tock, bestie 🕰️
• max_msg_size — maximum size of the message payload. That's the ceiling, the limit, the "don't test me" of payload sizes 🔥
• handle — a pointer to the SCMI entity handle. Pointing at things, as pointers do 🫶
• no_completion_irq — a flag that says this channel has no completion interrupt mechanism for synchronous commands. And listen, this one's spicy: it can be dynamically set by transports at run-time inside their provided .chan_setup. So it's not locked in at birth, it can change at runtime. Not me being flexible 💀
• transport_info — transport layer related information. Vibes. Transport vibes. 🚌

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🦋 SEE ALSO 🦋

Kernel file ./drivers/firmware/arm_scmi/common.h, plus the whole friend group:

• pack_scmi_header(9)
• unpack_scmi_header(9)
• struct scmi_transport_ops(9)
• struct scmi_desc(9)
• struct scmi_debug_info(9)
• struct scmi_shmem_io_ops(9)
• struct scmi_shared_mem_operations(9)
• struct scmi_message_operations(9)
• struct scmi_transport_core_operations(9)
• struct scmi_transport_handle(9)
• struct scmi_transport(9)
• struct scmi_transport_supplier(9)
• scmi_transport_supplier_put(9)
• scmi_transport_supplier_get(9)

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Ngl bestie, that SEE ALSO list is a whole squad. Read them all. Periodt. 💜

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And that's the page! 🧚 This little gem lives over at ./drivers/firmware/arm_scmi, dated October 2026, and the header/footer both rep struct scmi_chan_info(9). Go off, king 👑 🌈