fsl_create_mc_io(9)

💫 fsl_create_mc_io(9) 💫

okay so bestie, welcome to the Kernel API Manual — yes we're in kernel-land now, hold my iced coffee 🧊, this one's from fsl_create_mc_io(9) and it's giving "small function, big responsibilities" energy.

---

🌸 NAME 🌸

fsl_create_mc_io — Creates an MC I/O object ✨

Like, literally that's the whole gig. It makes you an MC I/O object. Iconic behavior only.

---

🎀 SYNOPSIS 🎀

int fsl_create_mc_io (struct device *dev , phys_addr_t
mc_portal_phys_addr , u32 mc_portal_size , struct fsl_mc_device
*dpmcp_dev , u32 flags , struct fsl_mc_io **new_mc_io );

six arguments, one int coming back at you, no cap 💅

---

🦋 ARGUMENTS 🦋

okay so here's the cast of characters, and every single one of them matters, so don't skip 👑

• dev — the device to be associated with the MC I/O object. like, this is the device it's gonna be linked with 🫶
• mc_portal_phys_addr — physical address of the MC portal to use. yes, physical, not virtual, don't come for me 🔥
• mc_portal_size — size in bytes of the MC portal. bytes, bestie, bytes 📏
• dpmcp_dev — Pointer to the DPMCP object associated with this MC I/O object or NULL if none. that "NULL if none" part is doing heavy lifting, notice it 🙈
• flags — flags for the new MC I/O object. cute little configuration vibes ✨
• new_mc_io — Area to return pointer to newly created MC I/O object. this is where the brand-new baby gets handed back to you 🍼💖

---

💜 DESCRIPTION 💜

Returns '0' on Success; Error code otherwise. 🎯

that's it, that's the description, and honestly? she's concise. if you get 0 back you slayed, anything else is an error code telling you it didn't go your way 😭

---

👑 SEE ALSO 👑

go touch grass in the kernel file ./drivers/bus/fsl-mc/mc-io.c and also go read up on your siblings:

• fsl_destroy_mc_io(9) — the one who cleans up after you 🧹
• fsl_mc_portal_allocate(9) — the portal hander-outer 🌀
• fsl_mc_portal_free(9) — the portal taker-backer 🌈

---

⭐ reminder bestie: this page comes from the Kernel API Manual, ./drivers/bus/fsl-mc, and it's dated October 2026 — so yeah, it's from the future, and it's still serving 💅🫶

k that's the whole page, go forth and create your MC I/O objects responsibly, mwah 💖🎀