pci_msix_write_tph_tag(9)

✨ NAME ✨

pci_msix_write_tph_tag — update the TPH tag for a given MSI-X vector. Okay bestie, this one is from the Kernel API Manual, and it’s giving “tiny but important PCI helper” energy 💅

🌸 SYNOPSIS 🌸

int pci_msix_write_tph_tag (struct pci_dev *pdev , unsigned int index ,
       u16 tag );

🎀 ARGUMENTS 🎀

• pdev — the PCIe device to update 🫶
• index — the MSI-X index to update ✨
• tag — the tag to write 💖

🔥 RETURN 🔥

Returns 0 on success, and an error code on failure. That’s it, that’s the vibe check 😌

🦋 SEE ALSO 🦋

• Kernel file ./drivers/pci/msi/msi.c
• pci_msi_supported(9)
• pci_msi_mask_irq(9)
• pci_msi_unmask_irq(9)
• msi_capability_init(9)
• pci_msi_vec_count(9)
• msix_prepare_msi_desc(9)
• msix_capability_init(9)

Lowkey obsessed with how much fits in such a small manpage. No cap, every detail is here 💯

xoxo bestie, this page comes from ./drivers/pci/msi, dated October 2026, and it is literally pci_msix_write_tph_tag(9) 💖🎀🦋