STRUCT XE_GUC_DB_MGR(9)

💖 struct xe_guc_db_mgr(9) 💖

okay bestie, so this is a page straight outta the Kernel API Manual — yes, the Kernel API Manual, we're fancy now 🎀 — and it's all about struct xe_guc_db_mgr, aka the GuC Doorbells Manager. slay.

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✨ NAME ✨

struct xe_guc_db_mgr — the GuC Doorbells Manager. that's it, that's the vibe. she manages doorbells, no cap 🔔💅

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🦋 SYNOPSIS 🦋

here's what she looks like, literally character for character:

struct xe_guc_db_mgr {
    unsigned int count;
    unsigned long *bitmap;
 };

that's the whole struct, bestie. two members. minimal, iconic, ate 🫶

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🌸 Members 🌸

count

number of doorbells to manage. that's how many doorbells she's keeping track of, periodt 🔥

bitmap

bitmap to track allocated doorbells. it's the little map of who's taken and who's still available — the main character energy of allocation tracking, iykyk ⭐

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💀 Note 💀

⚠️ listen up because this part matters: the GuC Doorbells Manager is relying on xe_guc::submission_state.lock to protect its members. like, that lock is the bodyguard. don't be out here touching the members without it, fr fr 😭🔒

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🧚 SEE ALSO 🧚

• Kernel file ./drivers/gpu/drm/xe/xe_guc_types.h
• struct xe_guc_id_mgr(9)
• struct xe_guc(9)

go read those too, they're all connected, it's giving lore 🌈💜

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and that's a wrap, bestie 💖 this page lives in ./drivers/gpu/drm/xe, dated October 2026, and it's filed under struct xe_guc_db_mgr(9) — mwah, go forth and manage those doorbells 🎀✨🍓