pci_epc_linkdown(9)

💖 pci_epc_linkdown(9) 💖

okay bestie, welcome to the Kernel API Manual ✨ this one is short and sweet: pci_epc_linkdown is the little heads-up that tells the EPF device the EPC device has dropped the connection with the Root Complex. yes, it's giving "we need to talk" but for kernel links 💔

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🌸 NAME 🌸

pci_epc_linkdown — Notify the EPF device that EPC device has dropped the connection with the Root Complex.

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🎀 SYNOPSIS 🎀

void pci_epc_linkdown (struct pci_epc *epc );

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🦋 ARGUMENTS 🦋

• epc — the EPC device which has dropped the link with the host

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✨ DESCRIPTION ✨

Invoke to Notify the EPF device that the EPC device has dropped the connection with the Root Complex.

like, literally just call it when the link goes bye-bye so the EPF side gets the memo 📣 no cap, that's the whole vibe.

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👀 SEE ALSO 👀

Kernel file ./drivers/pci/endpoint/pci-epc-core.c

• 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_init_notify(9)
• pci_epc_notify_pending_init(9)
• pci_epc_deinit_notify(9)
• pci_epc_bus_master_enable_notify(9)
• pci_epc_destroy(9)
• __pci_epc_create(9)
• __devm_pci_epc_create(9)

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mwah 💋 this iconic little page comes from ./drivers/pci/endpoint, dated October 2026, and it's pci_epc_linkdown(9) all the way 🫶