sci_apc_agent_link_up(9)

💖 sci_apc_agent_link_up(9) 💖

okay so bestie, welcome to the kernel API manual, this one's from sci_apc_agent_link_up(9) and it's literally all about handling apc link up events. yes gorl. let's get into it 🎀

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✨ NAME ✨

sci_apc_agent_link_up — handles apc link up events. that's it, that's the vibe. 👑

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🌸 SYNOPSIS 🌸

void sci_apc_agent_link_up (struct isci_host *ihost , struct
       sci_port_configuration_agent *port_agent , struct isci_port *iport ,
       struct isci_phy *iphy );

no return value, it's giving void, it just does the thing and leaves. main character energy tbh 💅

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🦋 ARGUMENTS 🦋

• ihost — the controller object that receives the link up notification. this is the one getting the news, fr fr.
• port_agent — the port configuration agent for the controller. your girl on the inside handling the config ✨
• iport — the port object associated with the phy. and listen — if there's no associated port, this bad boy is a NULL. no port, no problem, but also, mind the gap 🙈
• iphy — the phy object which has gone link up. it's up! it's awake! it's serving 🌈

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💜 DESCRIPTION 💜

so what does this method actually do? it handles the automatic port configuration for link up notifications — like, the moment a phy goes link up, this is the lil function that sorts out the port config for you. iconic behaviour honestly 🫶

and then there's the question the docs just leave hanging there, lowkey haunting:

Is it possible to get a link down notification from a phy that has no associated port?

that's the mystery bestie. the manpage really said "you tell me" 💀 no answer given, we just vibe with the uncertainty 😭

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🧚 SEE ALSO 🧚

• Kernel file ./drivers/scsi/isci/port_config.c — go read the source, it's all there iykyk
• sci_sas_address_compare(9)
• sci_port_configuration_agent_find_port(9)
• sci_port_configuration_agent_validate_ports(9)
• sci_mpc_agent_link_down(9)
• sci_apc_agent_link_down(9)

the whole link-up / link-down friend group, obsessed with them honestly 🌸

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and that's the whole page bestie!! 💖 this gem lives in ./drivers/scsi/isci, it's dated October 2026, and it's filed under sci_apc_agent_link_up(9) — slay, go forth and configure those ports 👑✨🎀