pci_sriov_get_totalvfs(9)

💅 pci_sriov_get_totalvfs — the Kernel API Manual, bestie edition

okay so real talk, this one's from the Kernel API Manual and it's genuinely such a little icon. it's giving "small function, big responsibilities" and honestly? we're obsessed. 🎀

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✨ NAME ✨

pci_sriov_get_totalvfs — get total VFs supported on this device 🦋

like, the whole entire vibe of this function is "hey how many Virtual Functions can this thing actually handle," and it answers you. periodt. 💅

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🌸 SYNOPSIS 🌸

unsigned int pci_sriov_get_totalvfs (struct pci_dev *dev );

that's it. that's the whole call. she takes one pointer and returns an unsigned int. no cap, super clean. ✨

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💖 ARGUMENTS 💖

• dev — the PCI PF device. that's the Physical Function, the main-character device of the SRIOV situation 👑

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🔥 DESCRIPTION 🔥

so here's the tea 🍓: if you've got a PCIe device that supports SRIOV, this function hands you back the PCIe SRIOV capability value of TotalVFs — OR, if the driver went and reduced it, the value of driver_max_VFs instead. either way you get the real, actual number you should care about. 💯

and if the device doesn't support SRIOV? you get 0. that's it. no drama, no error, just a nice little zero. 💀

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👑 SEE ALSO 👑

the kernel file lives at ./drivers/pci/iov.c — go pay her a visit, she's iconic 🌈

and here's the whole friend group, no one left out, fr fr:

• 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_num_vf(9)
• pci_vfs_assigned(9)
• pci_sriov_set_totalvfs(9)
• pci_sriov_configure_simple(9)
• pci_iov_vf_bar_set_size(9)
• pci_iov_vf_bar_get_sizes(9)

like okay, pci_sriov_set_totalvfs(9) is literally right there in the list — she's the setter, this page is the getter, they're a matched set, iykyk 🫶

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and that's the whole page bestie, go forth and count your VFs 🌟

mwah 💋 — this gem ships out of ./drivers/pci, dated October 2026, and it's filed under pci_sriov_get_totalvfs(9) in the Kernel API Manual. see you in the group chat 🧚‍♀️