mpt_host_pag...cess_control(9)

📦 version 7.3.1, in nixpkgs unstable

💅 NAME 💅

mpt_host_page_access_control — okay so this is the function that controls the IOC's Host Page Buffer access, and yes bestie, "IOC" and "Host Page Buffer" are both doing main character energy here 🎀

This one lives in the Kernel API Manual section 9, and honestly? It's giving "small function, big responsibility." ✨

🌸 SYNOPSIS 🌸

int mpt_host_page_access_control (MPT_ADAPTER *ioc , u8
access_control_value , int sleepFlag );

Three args, one int coming back at you. That's the whole vibe check 🔥

🦋 ARGUMENTS 🦋

  • ioc — pointer to the MPT adapter structure, aka the actual adapter you're talking to, no cap 🫶
  • access_control_value — the bits you're setting, and the deets on those bits are literally right below in DESCRIPTION 👇
  • sleepFlag — specifies whether the process can sleep. Like, can it nap or not, that's the whole question 😴

⭐ DESCRIPTION ⭐

So here's the tea: this provides the mechanism for the host driver to control the IOC's Host Page Buffer access 💖

Now, the Access Control Value lives in bits[15:12], and the options are:

  • 0h — Reserved 🙈
  • 1h — Enable Access { MPI_DB_HPBAC_ENABLE_ACCESS } ✅
  • 2h — Disable Access { MPI_DB_HPBAC_DISABLE_ACCESS } ❌
  • 3h — Free Buffer { MPI_DB_HPBAC_FREE_BUFFER } 🗑️

Returns 0 for success, non-zero for failure. Simple as that, and honestly we love a clean return contract 💅

👑 SEE ALSO 👑

Kernel file ./drivers/message/fusion/mptbase.c — and then, bestie, prepare yourself, because this list is long. Every single one of these is iconic in its own right 🌈

Like, that's the entire friend group right there. Not one of them skipped. We stan a thorough SEE ALSO 💜

🧚 SIGN-OFF 🧚

This little gem comes from ./drivers/message/fusion and it's dated October 2026 — so yeah, mark your calendars, bestie 🎀 Slay the day, control your Host Page Buffer access responsibly, and remember: 0 means success and that's the energy we're manifesting ✨💖🦋

📦 where this page comes from