mlx5_irq_request(9)

💅 mlx5_irq_request(9) — from the Kernel API Manual, bestie

okay so picture this: it's a kernel API manual page, it's called mlx5_irq_request, and it's here to teach you how to request an IRQ for an mlx5 PF/VF device ✨ that's the whole vibe. no cap, that's it. let's get into it 🎀

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✨ SYNOPSIS ✨

like, literally this exact thing, don't @ me:

struct mlx5_irq * mlx5_irq_request (struct mlx5_core_dev *dev , u16
vecidx , struct irq_affinity_desc *af_desc , struct cpu_rmap **rmap );

she takes four args and she serves 💅

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🌸 ARGUMENTS 🌸

• dev — the mlx5 device that's requesting the IRQ 🫶 like, the one doing the asking.
• vecidx — the vector index of the IRQ. heads up bestie: this argument is ignored if affinity is provided 🙈 (yes, ignored, as in it doesn't get used, as in don't come for me).
• af_desc — the affinity descriptor for this IRQ ✨
• rmap — a pointer to the reverse map pointer for completion interrupts 🦋

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💖 DESCRIPTION 💖

so what does she actually do? this function returns a pointer to the IRQ 🎀 or, if something goes sideways, an ERR_PTR instead 😭 no in-between, no maybe. that's the whole description. iconic behaviour tbh 👑

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🌈 SEE ALSO 🌈

go look at these, fr fr, iykyk:

• the kernel file ./drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c 📁 like actually go read it
• mlx5_get_default_msix_vec_count(9)
• mlx5_set_msix_vec_count(9)
• mlx5_ctrl_irq_release(9)
• mlx5_ctrl_irq_request(9)
• mlx5_irq_release_vector(9)
• mlx5_irq_request_vector(9)

the whole friend group, honestly 💜

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okay that's the page!! no gatekeeping, every single detail is right here where you left it 🫶

and a lil sign-off because we're classy: this one came from that source path that got cut off as ./drivers/net/ethernet/mellano..., dated October 2026, and yes she's still titled mlx5_irq_request(9) at the bottom too 💖 slay, go request your IRQ bestie, bye ✨🧚‍♀️