STRUCT GUC_CTB_INFO(9)

💅 struct guc_ctb_info(9) 💅

okay so real talk, this is a page straight out of the Kernel API Manual and it's all about one lil struct, and honestly? she's iconic. no cap. let's get into it bestie 🫶

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✨ NAME ✨

struct guc_ctb_info — the GuC command transport buffer (CTB) info 💖

like, it's literally the info struct for the CTB. that's the whole vibe check.

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🌸 SYNOPSIS 🌸

here's the whole struct, looking exactly like this, don't touch a single character:

struct guc_ctb_info {
    u32 size;
    u32 resv_space;
    u32 head;
    u32 tail;
    u32 space;
    bool broken;
 };

she's short, she's sweet, she's got six members and every single one of them matters. periodt.

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🎀 Members 🎀

okay bestie, let's go member by member because each one is doing her own lil job 🔥

• size — the size of the CTB commands, measured in DW. that's the whole capacity vibe.
• resv_space — the reserved space of the CTB commands, also in DW. think of it as the part that's already spoken for 💅
• head — the head of the CTB commands, in DW. yes, she has a head, she's a whole creature.
• tail — the tail of the CTB commands, in DW. head's bestie fr fr.
• space — the space in the CTB commands, in DW. this is your actual room-to-breathe situation.
• broken — a bool that says whether the channel is broken. and honestly? if this one's true, it's giving 💀. dramatic but accurate.

🦋 reminder: size, resv_space, head, tail and space are all measured in DW, and broken is the one and only bool in the group. don't mix them up, bestie.

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👑 SEE ALSO 👑

go read these next, they're literally the friend group 🌈

• Kernel file ./drivers/gpu/drm/xe/xe_guc_ct_types.h
• struct guc_ctb(9)
• struct guc_ctb_snapshot(9)
• struct xe_guc_ct_snapshot(9)
• enum xe_guc_ct_state(9)
• struct xe_guc_ct(9)

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✨ and that's the whole page, bestie. she's filed under ./drivers/gpu/drm/xe, she's stamped October 2026, and she answers to the name struct guc_ctb_info(9). mwah 💋 go forth and read structs responsibly 🧚💜