ntb_msi_init(9)

💖 NAME 💖

ntb_msi_init — Initialize the MSI context ✨

okay bestie, this page is straight from the Kernel API Manual, and it's all about ntb_msi_init. lowkey iconic setup energy 💅

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✨ SYNOPSIS ✨

the whole vibe:

int ntb_msi_init (struct ntb_dev *ntb , void (*desc_changed)(void *ctx)
);

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🫶 ARGUMENTS 🫶

• ntb — NTB device context 🎀
• desc_changed — bestie, the original literally says -- undescribed -- 😭 no cap, that's all we get. not me inventing lore, fr fr.

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🌸 DESCRIPTION 🌸

okay so this function must be called before any other ntb_msi function. like, no skipping ahead, bestie — it's giving prerequisites 👑

It initializes the context for MSI operations and maps the peer memory windows. 🦋

Also: this function reserves the last N outbound memory windows (where N is the number of peers). yes, the last ones. not the first. the way that N is doing main character math 💀✨

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🔥 RETURN 🔥

Zero on success 🎉 otherwise a negative error number 😭

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/ntb/msi.c
• ntb_msi_setup_mws(9)
• ntb_msi_clear_mws(9)
• ntbm_msi_request_threaded_irq(9)
• ntb_msi_peer_trigger(9)

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mwah 💋 that's the whole page, bestie — source/version ./drivers/ntb, dated October 2026. periodt 🫶🌈