epf_ntb_configure_db(9)

📦 version 7.3.1, in nixpkgs unstable

💫 epf_ntb_configure_db — the kernel API manual, but make it make sense ✨

okay so bestie, buckle up 🎀 this is epf_ntb_configure_db, a kernel API manual page (section 9, iykyk) and it's literally about setting up the Outbound Address Space so one host can ring the doorbell of the other host 🔔💅

Like, two hosts, one NTB device, and somebody's gotta be the one who knocks. That's this function. No cap. 🫶

✨ SYNOPSIS ✨

int epf_ntb_configure_db (struct epf_ntb *ntb , enum
       pci_epc_interface_type type , u16 db_count , bool msix );

that's the whole vibe check right there 💖

🌸 ARGUMENTS 🌸

  • ntb — the NTB device that facilitates communication between HOST1 and HOST2. it's the main character of this whole situation, honestly 👑
  • type — which interface we're working with: the PRIMARY interface or the SECONDARY interface 🦋
  • db_count — the count of the number of doorbells that has to be configured. yes, actual number of doorbells. 🔔✨
  • msix — indicates whether MSI-X or MSI should be used. pick your fighter 💀

⭐ DESCRIPTION ⭐

so what does it do? it invokes epf_ntb_configure_msix or epf_ntb_configure_msi — whichever one is required for one HOST to ring the doorbell of the other HOST 🔔🔔

that's it. that's the whole tea. one host, other host, doorbell, done. periodt 💅

🦋 SEE ALSO 🦋

the kernel file lives at ./drivers/pci/endpoint/functions/pci-epf-ntb.c — go read it, it's giving source-of-truth energy 📖✨

and here's the whole friend group, all the related manpages, no gatekeeping:

like, the entire squad is here and they all ate 🔥👑

🌈 okay that's the page!! sourced from ./drivers/pci/endpoint/functions, dated October 2026, and it's epf_ntb_configure_db(9) forever and always 💜 mwah, go ring that doorbell bestie 🔔🎀

📦 where this page comes from