epf_ntb_init_epc_bar(9)

epf_ntb_init_epc_bar(9) 💅

okay so this one is straight outta the Kernel API Manual, and it's giving "let's figure out which BARs go where" energy. No cap. ✨

🌸 NAME 🌸

epf_ntb_init_epc_bar — identify the BARs to be used for each of the NTB constructs: the scratchpad region, the doorbell, and the memorywindow. 💖

✨ SYNOPSIS ✨

int epf_ntb_init_epc_bar (struct epf_ntb *ntb );

🫶 ARGUMENTS 🫶

• ntb — the NTB device that facilitates communication between HOST and VHOST. This is the main-character struct here. 👑

🎀 RETURN 🎀

Zero for success, or an error code in case of failure. So like, 0 = slay, and an error code = something went sideways. 💀

🔥 SEE ALSO 🔥

Kernel file: ./drivers/pci/endpoint/functions/pci-epf-vntb.c

the whole friend group is here, bestie:

• epf_ntb_link_up(9)
• epf_ntb_configure_mw(9)
• epf_ntb_teardown_mw(9)
• epf_ntb_cmd_handler(9)
• epf_ntb_config_sspad_bar_clear(9)
• epf_ntb_config_sspad_bar_set(9)
• epf_ntb_config_spad_bar_free(9)
• epf_ntb_config_spad_bar_alloc(9)
• epf_ntb_configure_interrupt(9)
• epf_ntb_db_bar_init(9)
• epf_ntb_db_bar_clear(9)
• epf_ntb_mw_bar_init(9)
• epf_ntb_mw_bar_clear(9)
• epf_ntb_is_bar_used(9)
• epf_ntb_find_bar(9)
• epf_ntb_epc_init(9)
• epf_ntb_epc_cleanup(9)
• epf_ntb_add_cfs(9)
• epf_ntb_bind(9)
• epf_ntb_unbind(9)
• epf_ntb_probe(9)

and that's the whole page, bestie! source/version: ./drivers/pci/endpoint/functions · date: October 2026 🦋💖