ipc_mmio_init(9)

💖 ipc_mmio_init(9) 💖

okay so bestie, we're in the Kernel API Manual today and the star of the show is ipc_mmio_init(9) — literally the function that sets up your mmio era. no cap, it's a lil baby allocator and it eats. 🎀

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✨ NAME ✨

ipc_mmio_init — allocate mmio instance data 🦋

like... it gets the mmio data ready. that's the whole vibe check.

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✨ SYNOPSIS ✨

struct iosm_mmio * ipc_mmio_init (void __iomem *mmio_addr , struct
device *dev );

it's giving "small signature, big responsibility" honestly 💅

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✨ ARGUMENTS ✨

• mmio_addr — the mapped AP base address of the MMIO area. yes, mapped, as in already done for you, don't come for me. 🔥
• dev — pointer to the device structure. just a pointer. that's it. that's the whole thing. 🫶

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✨ RETURN ✨

the address of the mmio instance data 💖 … or NULL if it fails 😭 periodt. check your return values bestie, i'm begging.

like, NULL is the "it didn't slay" outcome. don't dereference it. iykyk.

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✨ SEE ALSO ✨

• Kernel file ./drivers/net/wwan/iosm/iosm_ipc_mmio.h
• struct iosm_mmio(9)
• ipc_mmio_set_psi_addr_and_size(9)
• ipc_mmio_set_contex_info_addr(9)
• ipc_mmio_get_cp_version(9)
• ipc_mmio_get_rom_exit_code(9)
• ipc_mmio_get_exec_stage(9)
• ipc_mmio_get_ipc_state(9)
• ipc_mmio_copy_chip_info(9)
• ipc_mmio_config(9)
• ipc_mmio_update_cp_capability(9)

the whole friend group honestly 🌈 go read all of them, they're all main character energy in their own way.

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okay so that's the page 💜 it lives in ./drivers/net/wwan/iosm and it says October 2026 on the tin — shoutout to the source and that date, iconic of them ngl 🌸 mwah, go init some mmio 💅✨