msi_create_irq_domain(9)

🎀 msi_create_irq_domain(9) — Kernel API Manual 🎀

okay bestie, welcome to the Kernel API Manual, and today’s main character is msi_create_irq_domain(9) — the function that creates an MSI interrupt domain. No cap, it’s giving “build the domain, bestie” energy. 💅✨

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✨ NAME ✨

msi_create_irq_domain — create an MSI interrupt domain 🫶

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🌸 SYNOPSIS 🌸

struct irq_domain * msi_create_irq_domain (struct fwnode_handle *fwnode
, struct msi_domain_info *info , struct irq_domain *parent );

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💖 ARGUMENTS 💖

• fwnode — the optional fwnode of the interrupt controller. Optional, bestie — not every interrupt controller is gonna hand you one. 🙈
• info — the MSI domain info. Yes, this is the info for the MSI domain, very demure, very literal. 🎀
• parent — the parent irq domain. It’s giving “respect your elders” but make it irq domains. 👑

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⭐ RETURN ⭐

You get a pointer to the created struct irq_domain — the whole point, slay — or NULL on failure. 😭 That’s the return value, fr fr.

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🦋 SEE ALSO 🦋

Kernel file: ./kernel/irq/msi.c — go read, iykyk. 💜

• struct msi_device_data(9)
• struct msi_ctrl(9)
• msi_alloc_desc(9)
• msi_domain_insert_msi_desc(9)
• msi_domain_free_msi_descs_range(9)
• msi_domain_add_simple_msi_descs(9)
• msi_setup_device_data(9)
• __msi_lock_descs(9)
• __msi_unlock_descs(9)
• msi_domain_first_desc(9)
• msi_next_desc(9)
• msi_domain_get_virq(9)
• msi_device_populate_sysfs(9)
• msi_device_destroy_sysfs(9)
• msi_domain_set_affinity(9)
• msi_create_parent_irq_domain(9)
• msi_parent_init_dev_msi_info(9)
• msi_create_device_irq_domain(9)
• msi_remove_device_irq_domain(9)
• msi_match_device_irq_domain(9)
• msi_domain_alloc_irqs_range_locked(9)
• msi_domain_alloc_irqs_range(9)
• msi_domain_alloc_irqs_all_locked(9)
• msi_domain_alloc_irq_at(9)
• msi_device_domain_alloc_wired(9)
• msi_domain_free_irqs_range_locked(9)
• msi_domain_free_irqs_range(9)
• msi_domain_free_irqs_all_locked(9)
• msi_domain_free_irqs_all(9)
• msi_device_domain_free_wired(9)
• msi_get_domain_info(9)
• msi_device_has_isolated_msi(9)

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that’s the tea from source/version ./kernel/irq, dated October 2026 — page msi_create_irq_domain(9), bye bestie, mwah 💋🎀