devfn_to_wslot(9)

🌸 devfn_to_wslot(9) — Linux PCI slot to Windows, but make it adorable 💅

Okay bestie, welcome to the Kernel API Manual page for devfn_to_wslot. This is the tiny little translator that handles the Linux-to-Windows PCI slot glow-up. It's giving “small function, main character energy”, and we're gonna read it together. 🫶

✨ NAME ✨

devfn_to_wslot - Convert from Linux PCI slot to Windows

🌈 SYNOPSIS 🌈

Here's the signature, exactly as the manual says it:

u32 devfn_to_wslot (int devfn );

🎀 ARGUMENTS 🎀

• devfn — The Linux representation of PCI slot. That's the input, bestie. 💖

💖 DESCRIPTION 💖

Windows uses a slightly different representation of PCI slot.

That's the lore. Not me being obsessed with a one-sentence description — it's short, it's cute, it's iconic. ✨

🦋 RETURN 🦋

The Windows representation. Slay. 💅

👑 SEE ALSO 👑

Okay, the SEE ALSO section is a whole friend group, and we're not leaving anyone out. First up, the kernel file:

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

Then the full squad, in the original order, no cap:

• 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)
• wslot_to_devfn(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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This page's source/version is ./drivers/pci/controller, dated October 2026, and the manual is devfn_to_wslot(9) — periodt, bestie. 💜