fw_run_transaction(9)

💅 fw_run_transaction(9) — Kernel API Manual 💅

okay so bestie, this is the Kernel API Manual page for fw_run_transaction(9), and it's giving “send a request, then sleep until the transaction is completed” main character energy. no cap. 🦋

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✨ NAME ✨

fw_run_transaction — send request and sleep until transaction is completed 💤

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🎀 SYNOPSIS 🎀

int fw_run_transaction (struct fw_card *card , int tcode , int destination_id , int generation , int speed , unsigned long long offset , void *payload , size_t length );

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🌸 ARGUMENTS 🌸

• card — the card interface for this request 🫶
• tcode — the transaction code ✨
• destination_id — the destination node ID, consisting of bus_ID and phy_ID 🎯
• generation — the bus generation in which the request and response are valid 🌀
• speed — the transmission speed ⚡
• offset — a 48bit wide offset into the destination's address space 📍
• payload — the data payload for the request subaction 📦
• length — the length of the payload, in bytes 📏

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💖 DESCRIPTION 💖

It returns the RCODE. See fw_send_request for parameter documentation. 👀

Unlike fw_send_request, data points to the payload of the request or/and to the payload of the response. 🔁

⚠️ DMA mapping restrictions apply to outbound request payloads of >= 8 bytes but not to inbound response payloads. So like… clock that tea, bestie. 😭

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🌈 SEE ALSO 🌈

Kernel file ./drivers/firewire/core-transaction.c:

• __fw_send_request(9)
• fw_core_add_address_handler(9)
• fw_core_remove_address_handler(9)
• fw_send_response(9)
• fw_get_request_speed(9)
• fw_request_get_timestamp(9)
• fw_rcode_string(9)

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xoxo bestie 💖 — source/version: ./drivers/firewire, date: October 2026, page: fw_run_transaction(9). it's literally iconic. slay and goodbye. ✨