epf_ntb_configure_interrupt(9)

💅 epf_ntb_configure_interrupt 💅

okay so this is a page from the Kernel API Manual (yes the actual kernel manual, we're fancy now ✨) and it's about one very specific little function that makes interrupts happen. stay with me bestie, it's short and it slays.

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🌸 NAME 🌸

epf_ntb_configure_interrupt — the one that configures the MSI/MSI-X capability 🎀

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✨ SYNOPSIS ✨

int epf_ntb_configure_interrupt (struct epf_ntb *ntb );

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🫶 ARGUMENTS 🫶

• ntb — the NTB device, aka the little matchmaker that facilitates communication between HOST and VHOST. it's giving bridge energy, honestly 💅

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💖 DESCRIPTION 💖

So what does it do? it configures the MSI/MSI-X capability for each interface, and the number of interrupts it sets up is equal to the "db_count" configfs entry. that's the whole vibe. no cap. 🔥

like — every interface gets its MSI/MSI-X situation sorted, and "db_count" from configfs is the number that decides how many interrupts we're working with. iconic behaviour, truly. 👑

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🌈 RETURN 🌈

• Zero for success — slay, we ate 💖
• an error code in case of failure — 😭 it happens, at least it tells you

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🦋 SEE ALSO 🦋

• the kernel file: ./drivers/pci/endpoint/functions/pci-epf-vntb.c (iykyk)
• 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_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_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)

like, that's the whole friend group right there 🫂💜

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ngl bestie, if you're here you're probably deep in PCI endpoint function code, and honestly? proud of you. 🧚 go read the source, it's in ./drivers/pci/endpoint/functions and it's waiting for you 🍓

and that's the page!! footer says ./drivers/pci/endpoint/functions, October 2026, and yeah — it's all about epf_ntb_configure_interrupt(9) 💖 mwah, go configure those interrupts, main character 💅✨🎀