afu_mmio_region_add(9)

💖 afu_mmio_region_add(9) 💖

okay bestie, so this one lives in the Kernel API Manual and it is literally the function that adds an mmio region to a given feature dev. that's the whole vibe. let's get into it 🎀

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✨ NAME ✨

afu_mmio_region_add — add a mmio region to given feature dev. 💅

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🌸 SYNOPSIS 🌸

int afu_mmio_region_add (struct dfl_feature_dev_data *fdata , u32
region_index , u64 region_size , u64 phys , u32 flags );

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🦋 ARGUMENTS 🦋

• fdata — the afu feature dev data. like, the whole feature dev's data situation 🫶
• region_index — the region index. which region are we talking about, bestie ✨
• region_size — the region size. how big is it fr fr
• phys — the region's physical address of this region. yes, physical physical 🔥
• flags — the region flags (access permission). aka who's allowed to do what 🙈

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⭐ RETURN ⭐

0 on success, negative error code otherwise. no cap — zero means slay, negative means something went sideways 😭

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👑 SEE ALSO 👑

kernel file ./drivers/fpga/dfl-afu-region.c, plus the whole friend group:

• afu_mmio_region_init(9)
• afu_mmio_region_destroy(9)
• afu_mmio_region_get_by_index(9)
• afu_mmio_region_get_by_offset(9)

go read those too, iykyk 💜

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and that's the page, bestie!! this iconic lil entry comes to you from the source ./drivers/fpga and it's dated October 2026 — see u in the next manpage, mwah 💋