epf_ntb_db_mw_bar_cleanup(9)

📦 version 7.3.1, in nixpkgs unstable

💖 epf_ntb_db_mw_bar_cleanup 💖

okay so this little icon is straight out of the Kernel API Manual, and honestly it’s giving “cleanup era” ✨. The function is epf_ntb_db_mw_bar_cleanup, and she does exactly what the name says: clears the doorbell/memory BAR and frees the memory that got allocated in peers outbound address space. no cap 🫶

✨ NAME ✨

epf_ntb_db_mw_bar_cleanup — clear doorbell/memory BAR and free memory allocated in peers outbound address space 💅

🌸 SYNOPSIS 🌸

literally the whole signature, bestie:

void epf_ntb_db_mw_bar_cleanup (struct epf_ntb *ntb , enum
pci_epc_interface_type type );

🎀 ARGUMENTS 🎀

  • ntb — the NTB device that facilitates communication between HOST1 and HOST2 💖
  • type — PRIMARY interface or SECONDARY interface. pick your lane, bestie 🌈

🦋 DESCRIPTION 🦋

So she’s the wrapper for epf_ntb_db_mw_bar_clear to clear HOST1’s BAR, and epf_ntb_free_peer_mem which frees up HOST2 outbound memory. That’s the whole vibe: clear the BAR, free the peer memory, clean up the situation 💅✨

👑 SEE ALSO 👑

Starting with the kernel file:

  • ./drivers/pci/endpoint/functions/pci-epf-ntb.c

Then the whole bestie list, no skips, no crumbs:

sign-off vibes: source/version lives at ./drivers/pci/endpoint/functions, dated October 2026, and this page is epf_ntb_db_mw_bar_cleanup(9) 💖🧚✨

📦 where this page comes from