fsl_open_outb_mbox(9)

💌 NAME 💌

okay so bestie, this is fsl_open_outb_mbox(9) from the Kernel API Manual, and it is literally the setup ritual for the MPC85xx outbound mailbox 💅

fsl_open_outb_mbox — Initialize MPC85xx outbound mailbox.

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💅 SYNOPSIS 💅

int fsl_open_outb_mbox (struct rio_mport *mport , void *dev_id , int
mbox , int entries );

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🎀 ARGUMENTS 🎀

• mport — the master port implementing the outbound message unit 👑
• dev_id — device-specific pointer to pass on event 🫶
• mbox — the mailbox to open 📬
• entries — number of entries in the outbound mailbox ring 🔁

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✨ DESCRIPTION ✨

So what it does: it initializes the buffer ring, requests the outbound message interrupt, and enables the outbound message unit — the whole outbound-message setup arc ✨

Return vibe check: it gives you 0 on success, and -EINVAL or -ENOMEM on failure 😭 no in-between.

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🦋 SEE ALSO 🦋

Kernel file: ./arch/powerpc/sysdev/fsl_rmu.c — and the rest of the bestie squad:

• fsl_rio_tx_handler(9)
• fsl_rio_rx_handler(9)
• fsl_rio_dbell_handler(9)
• fsl_rio_port_write_handler(9)
• fsl_rio_pw_enable(9)
• fsl_rio_port_write_init(9)
• fsl_rio_doorbell_send(9)
• fsl_add_outb_message(9)
• fsl_close_outb_mbox(9)
• fsl_open_inb_mbox(9)
• fsl_close_inb_mbox(9)
• fsl_add_inb_buffer(9)
• fsl_get_inb_message(9)
• fsl_rio_doorbell_init(9)

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xoxo, your fsl_open_outb_mbox(9) bestie 💖 — source/version ./arch/powerpc/sysdev, dated October 2026. periodt.