wslot_to_devfn(9)

🌸 NAME 🌸

okay so bestie, this is wslot_to_devfn(9) from the Kernel API Manual, and it’s literally the “Convert from Windows PCI slot to Linux” girlie. Her whole job is taking the Windows side and handing you the Linux side. Periodt. 💅

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✨ SYNOPSIS ✨

int wslot_to_devfn (u32 wslot );

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🎀 ARGUMENTS 🎀

• wslot — The Windows representation of PCI slot. That’s the u32 you’re feeding her, mwah. 🫶

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🦋 DESCRIPTION 🦋

Windows uses a slightly different representation of PCI slot.

That’s the vibe. This function is the lowkey translator between that Windows representation and the Linux one. No extra plot twists, no secret side quests — just the conversion, bestie. 🧚

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💅 RETURN 💅

The Linux representation. Yep, that’s what comes back — the Linux-side value from the conversion, and the synopsis says the return type is int. Slay. ✨

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🔥 SEE ALSO 🔥

Kernel file ./drivers/pci/controller/pci-hyperv.c

Then the whole icon friend group:

• struct hv_msi_desc(9)
• struct hv_msi_desc2(9)
• struct tran_int_desc(9)
• hv_irq_retarget_interrupt(9)
• hv_pci_generic_compl(9)
• devfn_to_wslot(9)
• _hv_pcifront_read_config(9)
• _hv_pcifront_write_config(9)
• hv_pcifront_read_config(9)
• hv_pcifront_write_config(9)
• hv_pci_read_config_compl(9)
• hv_read_config_block(9)
• hv_pci_write_config_compl(9)
• hv_write_config_block(9)
• hv_register_block_invalidate(9)
• hv_msi_free(9)
• hv_compose_msi_msg(9)
• hv_pcie_init_irq_domain(9)
• get_bar_size(9)
• survey_child_resources(9)
• prepopulate_bars(9)
• create_root_hv_pci_bus(9)
• q_resource_requirements(9)
• new_pcichild_device(9)
• get_pcichild_wslot(9)
• pci_devices_present_work(9)
• hv_pci_start_relations_work(9)
• hv_pci_devices_present(9)
• hv_pci_devices_present2(9)
• hv_eject_device_work(9)
• hv_pci_eject_device(9)
• hv_pci_onchannelcallback(9)
• hv_pci_protocol_negotiation(9)
• hv_pci_free_bridge_windows(9)
• hv_pci_allocate_bridge_windows(9)
• hv_allocate_config_window(9)
• hv_pci_enter_d0(9)
• hv_pci_query_relations(9)
• hv_send_resources_allocated(9)
• hv_send_resources_released(9)
• hv_pci_probe(9)
• hv_pci_remove(9)

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byeeee bestie 💖 source/version: ./drivers/pci/controller · date: October 2026 · page: wslot_to_devfn(9) 🎀