ocxl_global_mmio_write64(9)

💖 ocxl_global_mmio_write64(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — yes, the actual kernel API manual, and yes, you're about to absolutely slay this one. This is the page for ocxl_global_mmio_write64, and it's giving "small function, big responsibility." Let's go 🎀

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🌸 NAME 🌸

ocxl_global_mmio_write64 — write a 64 bit value to global MMIO. that's it, that's the whole vibe 💅

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✨ SYNOPSIS ✨

int ocxl_global_mmio_write64 (struct ocxl_afu *afu , size_t offset ,
       enum ocxl_endian endian , u64 val );

like, that's the signature, no cap. four things go in, an int comes out 🦋

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🫶 ARGUMENTS 🫶

• afu — The AFU. literally the star of the show, main character energy 👑
• offset — The Offset from the start of MMIO. so it's measured from the beginning of the MMIO, not from wherever, iykyk 🎀
• endian — the endianness that the MMIO data is in. yes bestie, endianness matters, always has 🌈
• val — The value to write. the u64. the actual payload. iconic 💜

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💀 DESCRIPTION 💀

Returns 0 for success, negative on error.

that's the whole description. no extra lore. if it worked, 0 — if it didn't, something negative. that's the vibe check, periodt 💅

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🔥 SEE ALSO 🔥

Kernel file ./include/misc/ocxl.h — and honestly the whole friend group is here, so let's list them all because nobody gets left out:

• ocxl_function_open(9)
• ocxl_function_afu_list(9)
• ocxl_function_fetch_afu(9)
• ocxl_afu_get(9)
• ocxl_afu_put(9)
• ocxl_function_config(9)
• ocxl_function_close(9)
• ocxl_context_alloc(9)
• ocxl_context_free(9)
• ocxl_context_attach(9)
• ocxl_context_detach(9)
• ocxl_afu_irq_alloc(9)
• ocxl_afu_irq_free(9)
• ocxl_afu_irq_get_addr(9)
• ocxl_irq_set_handler(9)
• ocxl_afu_config(9)
• ocxl_afu_set_private(9)
• ocxl_afu_get_private(9)
• ocxl_global_mmio_read32(9)
• ocxl_global_mmio_read64(9)
• ocxl_global_mmio_write32(9)
• ocxl_global_mmio_set32(9)
• ocxl_global_mmio_set64(9)
• ocxl_global_mmio_clear32(9)
• ocxl_global_mmio_clear64(9)

like, look at that roster. read32 and read64, write32 and write64, set and clear at both widths… it's a whole family reunion 🧚💖

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ngl bestie, this page is short but that's not a bad thing — sometimes the smallest manpage ate the hardest 🍓

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and that's a wrap! 🌟 this little number lives in ./include/misc, timestamped October 2026, and it goes by ocxl_global_mmio_write64(9) — mwah, go write your 64 bits, bestie 💜✨🦋