scmi_do_xfer_raw_start(9)

💅 scmi_do_xfer_raw_start(9) — from the Kernel API Manual, bestie

okay so picture this: you're deep in the arm_scmi firmware driver, you've already built yourself a shiny raw xfer, and now you just need someone to actually send it. that's this function. it's the little helper that does the sending. icon behavior only. ✨

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🌸 NAME 🌸

scmi_do_xfer_raw_start — an helper to send a valid raw xfer 🫶

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🎀 SYNOPSIS 🎀

int scmi_do_xfer_raw_start (struct scmi_raw_mode_info *raw , struct
       scmi_xfer *xfer , u8 chan_id , bool async );

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🦋 ARGUMENTS 🦋

• raw — a reference to the Raw instance. like, the whole vibe. you gotta hand it over.
• xfer — the xfer to send. the main character of this whole operation, fr fr.
• chan_id — the channel ID to use. and here's the tea 🍵: if it's zero, the channel gets automatically selected based on the protocol used. so 0 = "you pick for me, i trust you."
• async — a flag stating if an asynchronous command is required. bool. yes or no. that's it. that's the whole flag.

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💖 DESCRIPTION 💖

This function sends a previously built raw xfer using an appropriate channel, and then queues the related waiting work. so basically: send it, and don't forget to set up the follow-up. 💅

and now the important part, no cap: we need to know explicitly whether the required command is meant to be asynchronous in kind, because we have to properly set up the waiter. you can't just vibe-check it from the payload — deducing it that way is weak and does not scale, given there is NOT a common header-flag stating if the command is asynchronous or not. 😭 so pass the flag. be honest with the function. it's a whole trust thing.

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✨ RETURN ✨

0 on Success 🔥

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/firmware/arm_scmi/raw_mode.c
• Theory of operation(9)
• struct scmi_raw_queue(9)
• struct scmi_raw_mode_info(9)
• struct scmi_xfer_raw_waiter(9)
• struct scmi_raw_buffer(9)
• struct scmi_dbg_raw_data(9)
• scmi_xfer_raw_worker(9)
• scmi_xfer_raw_get_init(9)
• scmi_raw_message_send(9)
• scmi_raw_message_receive(9)
• scmi_raw_mode_init(9)
• scmi_raw_mode_cleanup(9)
• scmi_raw_message_report(9)
• scmi_raw_error_report(9)

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and that's the page, bestie 🧚 this little gem lives over in ./drivers/firmware/arm_scmi, dated October 2026, and it answers to the name scmi_do_xfer_raw_start(9). go forth and send those raw xfers 💜