pci_epc_bus_...nable_notify(9)

💅 pci_epc_bus_master_enable_notify 💅

okay so bestie, welcome to the Kernel API Manual — this one's a function page, and no cap it's a cute little one. It lives in the kernel docs and it's about telling your EPF device "hey girl, the host just did a thing." Let's get into it 🎀

---

✨ NAME ✨

pci_epc_bus_master_enable_notify — Notify the EPF device that the EPC device has received the Bus Master Enable event from the Root complex

like literally that's the whole job. she's a messenger. 💌

---

✨ SYNOPSIS ✨

void pci_epc_bus_master_enable_notify (struct pci_epc *epc );

void return, one argument, zero drama. she ate and left no crumbs 🔥

---

✨ ARGUMENTS ✨

• epc — the EPC device that received the Bus Master Enable event 👑 this is the main character of the function, the one who got the news and is now passing it along.

---

✨ DESCRIPTION ✨

so here's the vibe: this function notifies the EPF device that the EPC device has generated the Bus Master Enable event — and that happened because the host set the Bus Master Enable bit in the Command register. 🦋

that's it. that's the tea. host flips a bit, EPC device gets the event, EPF device gets told about it via this function. passing the message along like a good bestie fr fr 💖

---

✨ SEE ALSO ✨

the kernel file is at ./drivers/pci/endpoint/pci-epc-core.c — go say hi to her, she's iconic 🌸

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

pci_epc_put(9), pci_epc_get(9), pci_epc_get_first_free_bar(9), pci_epc_get_next_free_bar(9), pci_epc_get_features(9), pci_epc_get_aux_resources_count(9), pci_epc_get_aux_resources(9), pci_epc_stop(9), pci_epc_start(9), pci_epc_raise_irq(9), pci_epc_map_msi_irq(9), pci_epc_get_msi(9), pci_epc_set_msi(9), pci_epc_get_msix(9), pci_epc_set_msix(9), pci_epc_unmap_addr(9), pci_epc_map_addr(9), pci_epc_mem_map(9), pci_epc_mem_unmap(9), pci_epc_clear_bar(9), pci_epc_set_bar(9), pci_epc_bar_size_to_rebar_cap(9), pci_epc_write_header(9), pci_epc_add_epf(9), pci_epc_remove_epf(9), pci_epc_linkup(9), pci_epc_linkdown(9), pci_epc_init_notify(9), pci_epc_notify_pending_init(9), pci_epc_deinit_notify(9), pci_epc_destroy(9), __pci_epc_create(9), __devm_pci_epc_create(9)

---

okay that's the page!! mwah 💋 this gem came out of ./drivers/pci/endpoint, dated October 2026, and the header's still pci_epc_bus_...nable_notify(9) in case you were wondering (yes the name got truncated, yes it's still slaying). go forth and notify, bestie 🫶✨