pcie_tph_set_st_entry(9)

📦 version 7.3.1, in nixpkgs unstable

💅 pcie_tph_set_st_entry — the Kernel API Manual glow-up 🎀

okay so bestie, welcome to the pcie_tph_set_st_entry(9) page, straight out of the Kernel API Manual. this is the little function that writes a Steering Tag into an ST table entry, and honestly? she's giving precise, she's giving surgical, and she's about to eat. ✨

🌸 NAME 🌸

pcie_tph_set_st_entry — literally just Set Steering Tag in the ST table entry. that's it, that's the whole vibe. 💅

🦋 SYNOPSIS 🦋

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

like, copy it exactly please, i'm not playing 🙈

✨ ARGUMENTS ✨

  • pdev — the PCI device in question, our main character 🫶
  • index — the ST table entry index, i.e. which slot we're writing into 👑
  • tag — the Steering Tag to be written. that's the payload, the moment, the whole point 🎀

💖 DESCRIPTION 💖

okay so here's what she does, and this part is actually iconic: the function figures out the proper location of the ST table — and by that i mean it's either in the MSI-X table or in the TPH Extended Capability space 🌀 — and then it writes the Steering Tag into the ST entry pointed by index. no cap, that's the whole plot. the way she just knows where the table lives?? obsessed. 🧚

🔥 RETURN 🔥

0 if success ✨ — otherwise a negative value (-errno), which is the kernel's way of saying "we're not okay" 😭

💀 SEE ALSO 💀

go read those too bestie, iykyk 🌈

lowkey a reminder: all these options, values, types and paths are the real deal — don't go renaming them, fr fr 🍓

and that's the page, periodt 💅 shoutout one last time to pcie_tph_set_st_entry(9) from the Kernel API Manual, sourced out of ./drivers/pci, dated October 2026 — slay, see you in the next one, mwah 😘💜🌸

📦 where this page comes from