cxl_find_regblock_instance(9)

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

okay so picture this: you're in the Kernel API Manual, page cxl_find_regblock_instance(9), and it's giving "let me find that one specific register block for you" energy. this is the function you call when you know what type you want and which one of that type you want. she's a locator, she's a matcher, she's doing the most for your CXL device 🎀

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✨ NAME ✨

cxl_find_regblock_instance — locate a register block by type / index. literally what it says on the tin, no cap 💖

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🌸 SYNOPSIS 🌸

int cxl_find_regblock_instance (struct pci_dev *pdev , enum
       cxl_regloc_type type , struct cxl_register_map *map , unsigned int index
       );

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🦋 ARGUMENTS 🦋

• pdev — the CXL PCI device you're enumerating. this is the main character you're snooping around in 👑
• type — the Register Block Indicator id. like, which flavor of regblock are we hunting 🍓
• map — the enumeration output. heads up bestie: this gets clobbered on error, so don't be out here trusting it if things go sideways 😭
• index — index into which particular instance of a regblock you want, in the order found in the register locator DVSEC. it's giving "there are several, pick your fave" 💅

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💫 RETURN 💫

0 if the register block got enumerated, and a negative error code otherwise. no in-between, she's binary like that 🌈

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🔥 DESCRIPTION 🔥

A CXL DVSEC may point to one or more register blocks, and this function's whole job is to search for them by type and index. so you bring the type, you bring the index, and she goes off and finds the one you meant. periodt ✨

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🧚 SEE ALSO 🧚

Kernel file ./drivers/cxl/core/regs.c — and also:

• cxl registers(9)
• cxl_probe_component_regs(9)
• cxl_probe_device_regs(9)
• cxl_find_regblock(9)
• cxl_count_regblock(9)

go read those too, iykyk 🫶

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ngl, the whole ./drivers/cxl/core girlies ate this one up — that's the source and version, and we're stamping it October 2026. bye bestie, slay your enumeration 💜