pci_num_vf(9)

🦋 NAME 🦋

pci_num_vf — bestie, this one just tells you how many VFs are chilling with a PF 💅

also lowkey tagged along: device_release_driver

---

✨ SYNOPSIS ✨

int pci_num_vf (struct pci_dev *dev );

---

🎀 ARGUMENTS 🎀

• dev — the PCI device, aka the star of the show 👑

---

💖 DESCRIPTION 💖

Returns the number of VFs, or 0 if SR-IOV is not enabled. That's it, that's the whole vibe. No cap 🫶

okay but fr fr, if SR-IOV isn't turned on you're getting a 0 back, not an error — know the difference bestie 😭

---

🌈 SEE ALSO 🌈

Kernel file ./drivers/pci/iov.c — and the whole friend group 👯‍♀️

• pci_iov_get_pf_drvdata(9)
• pci_iov_init(9)
• pci_iov_release(9)
• pci_iov_remove(9)
• pci_iov_update_resource(9)
• pci_sriov_resource_alignment(9)
• pci_restore_iov_state(9)
• pci_vf_drivers_autoprobe(9)
• pci_iov_bus_range(9)
• pci_enable_sriov(9)
• pci_disable_sriov(9)
• pci_vfs_assigned(9)
• pci_sriov_set_totalvfs(9)
• pci_sriov_get_totalvfs(9)
• pci_sriov_configure_simple(9)
• pci_iov_vf_bar_set_size(9)
• pci_iov_vf_bar_get_sizes(9)

---

okay that's the whole page, mwah 💋 this one lives under ./drivers/pci and it's dated October 2026 — yes, the future, she's iconic like that 🧚‍♀️⭐