cxl_validat...ation_params(9)

✨ cxl_validat...ation_params(9) ✨

okay so quick vibe check bestie 💅 we're in the Kernel API Manual today, and this little function is literally the bouncer at the club door for CXL translation params. it checks your fit before you get in. no cap. 🎀

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🌸 NAME 🌸

cxl_validate_translation_params — that's it, that's the name, the description part is just... blank up there 🙈 (yes fr, the original page leaves it hanging, we don't make the rules)

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🦋 SYNOPSIS 🦋

int cxl_validate_translation_params (u8 eiw , u16 eig , int pos );

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💖 ARGUMENTS 💖

• eiw — the encoded interleave ways. yes bestie, encoded, don't come at me with raw values 🫶
• eig — the encoded interleave granularity. same deal, it's encoded, ikyk 😌
• pos — position in interleave. where you at in the lineup, basically 🌈

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💅 DESCRIPTION 💅

okay so here's the tea ☕ — callers pass CXL_POS_ZERO when there's no position parameter that needs validating. like, "nothing to check here, we're good, moving on" energy. periodt. 👑

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⭐ RETURN ⭐

• 0 — success, slay, we ate 💖✨
• -EINVAL — on the first invalid parameter. note that "first" bestie, it bails on the first bad one it finds, it's not doing a full sweep of your whole messy situation 😭

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/cxl/core/region.c cxl core region(9)
• cxl_port_pick_region_decoder(9)
• cxl_port_attach_region(9)
• cxl_calc_interleave_pos(9)
• devm_cxl_add_region(9)

go read those, they're iconic, they're giving main character energy 👑🦋

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lowkey a warning bestie: -EINVAL fires on the first invalid parameter, so if you fixed one thing and it's still mad at you, there might be another one lurking 👀 fix them all, don't make it come back twice 💀

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and that's the whole page fr fr 🎀 sign-off time: this cutie lives over in ./drivers/cxl/core, dated October 2026, and it's serving Kernel API Manual realness from top to bottom. mwah 💜🧚‍♀️🌺