epf_ntb_is_bar_used(9)

💅 epf_ntb_is_bar_used — a Kernel API Manual moment

okay so bestie, welcome to the epf_ntb_is_bar_used(9) page — yes that's section 9, the kernel API manual section, we're in driver land now 🎀 and honestly this little function is giving "small but crucial" main character energy.

---

🌸 NAME 🌸

epf_ntb_is_bar_used — literally just checks whether a bar is used in the ntb configuration. that's it. that's the gig. 💖

---

✨ SYNOPSIS ✨

bool epf_ntb_is_bar_used (struct epf_ntb *ntb , enum pci_barno barno );

see how it returns a bool? so it's a yes/no situation, no cap. 🦋

---

🫶 ARGUMENTS 🫶

• ntb — the NTB device that facilitates communication between HOST and VHOST. it's the whole reason this call exists, the icon, the moment 👑
• barno — the checked bar number. as in, this is the bar we're asking about. don't come for her unless you brought a bar number 💅

---

⭐ RETURN ⭐

true if used, false if free. that's the whole vibe check right there — used or free, no in-between, no "it's complicated" 😭

---

🌈 SEE ALSO 🌈

the kernel file lives right here, bestie:

./drivers/pci/endpoint/functions/pci-epf-vntb.c

and here's the whole friend group, all the siblings in the same source file, go say hi 🧚:

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_find_bar(9), epf_ntb_init_epc_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)

that's a lot of friends and honestly we stan a well-documented directory 💜

---

ngl there are no bugs, warnings, authors, or license lines on this page — just vibes, one bool, and a whole lot of bar-checking 🍓

---

okay that's the page!! mwah 💋 this one came from ./drivers/pci/endpoint/functions, dated October 2026 — stay slay, stay bool, and remember: true if used, false if free, periodt. 🌸✨🦋