cxl_root_decoder_alloc(9)

💅 cxl_root_decoder_alloc(9) — the Kernel API Manual, but make it make sense

okay so bestie, welcome to the cxl_root_decoder_alloc(9) page 💖 this is straight out of the Kernel API Manual and it's genuinely iconic once you know what's going on, i promise.

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🌸 NAME 🌸

cxl_root_decoder_alloc — allocate a root level decoder, that's the whole vibe ✨

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🎀 SYNOPSIS 🎀

struct cxl_root_decoder * cxl_root_decoder_alloc (struct cxl_port *port
, unsigned int nr_targets );

like, you hand it a port and a nr_targets, and it gives you back a struct cxl_root_decoder * 🫶

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🦋 ARGUMENTS 🦋

• port — the owning CXL root of this decoder. think of it as the main character's home base 👑
• nr_targets — the static number of downstream targets. static, meaning fixed, meaning don't come for it 🔥

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⭐ RETURN ⭐

it returns a new cxl decoder that's meant to be registered by cxl_decoder_add 💫 and also — a firmware description of CXL resources into a CXL standard decode topology. yes that's literally what it says, no i'm not paraphrasing, periodt.

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🌈 SEE ALSO 🌈

the whole friend group, fr fr:

• Kernel file ./drivers/cxl/core/port.c
• cxl core(9)
• devm_cxl_add_port(9)
• devm_cxl_add_dport(9)
• devm_cxl_add_rch_dport(9)
• cxl_add_ep(9)
• find_cxl_port_by_dport(9)
• find_cxl_port_by_uport(9)
• cxl_decoder_init(9)
• cxl_switch_decoder_alloc(9)
• cxl_endpoint_decoder_alloc(9)
• cxl_decoder_add_locked(9)
• cxl_decoder_add(9)
• __cxl_driver_register(9)
• cxl_endpoint_get_perf_coordinates(9)

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lowkey a whole squad, and they all live over in ./drivers/cxl/core 🧚

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okay that's the page!! sourced from ./drivers/cxl/core, dated October 2026, and yeah — this was the cxl_root_decoder_alloc(9) moment 💜 slay, go allocate urself a root decoder bestie 🎀✨