cxl_find_regblock(9)

💅 cxl_find_regblock(9) — from the Kernel API Manual, bestie 🎀

okay so bestie, welcome to cxl_find_regblock(9) — yes that's the full name, yes it's a mouthful, and yes it's lowkey iconic. this is a kernel API page, so grab your iced coffee and let's get into it ✨

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🦋 NAME 🦋

cxl_find_regblock — literally the function that goes and locates register blocks by type, no cap 🔍

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🌸 SYNOPSIS 🌸

int cxl_find_regblock (struct pci_dev *pdev , enum cxl_regloc_type type
, struct cxl_register_map *map );

that's the whole signature, character for character, don't come for me 💅

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💖 ARGUMENTS 💖

• pdev — the CXL PCI device we're gonna enumerate 🖥️ this is your main character, the thing we're actually digging through.
• type — the Register Block Indicator id 🏷️ like, which flavour of register block are we hunting for.
• map — the enumeration output 📝 but heads up: it gets clobbered on error 😭 so don't get attached to whatever's in there if things go sideways.

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⭐ RETURN ⭐

0 if the register block got enumerated successfully 🥳 and a negative error code otherwise 💀 that's it, that's the whole vibe check.

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👑 DESCRIPTION 👑

so here's the lore: a CXL DVSEC may point to one or more register blocks, and this function's whole job is to search for them by type 🎯 like you hand it a type, it goes rummaging through the blocks and finds the one that matches. queen behavior tbh 🫶

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/cxl/core/regs.c — that's where the source lives, go read it iykyk 📖
• cxl registers(9)
• cxl_probe_component_regs(9)
• cxl_probe_device_regs(9)
• cxl_find_regblock_instance(9)
• cxl_count_regblock(9)

all the sibling functions, the whole friend group fr fr 🧚💜

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ngl bestie, if you're reading this at 3am debugging CXL enumeration, drink some water 💧 you got this ✨

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and that's the page!! brought to you from ./drivers/cxl/core, dated October 2026 🍓 mwah, slay, periodt 💅🎀