xe_guc_db_m...ve_id_locked(9)

xe_guc_db_m...ve_id_locked(9)</p> 💅

okay so bestie, this is from the Kernel API Manual (section 9, the kernel-functions girlypop section 🎀), and it's about reserving one (1) single GuC Doorbell ID. that's it. that's the whole vibe. let's get into it ✨

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🦋 NAME 🦋

xe_guc_db_mgr_reserve_id_locked — reserve a single GuC Doorbell ID 😌 like claiming your spot in the group chat before anyone else can take it 🫶

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✨ SYNOPSIS ✨

int xe_guc_db_mgr_reserve_id_locked (struct xe_guc_db_mgr *dbm );

literally one (1) argument. we love a low-maintenance function 💖

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🌸 ARGUMENTS 🌸

• dbm — the xe_guc_db_mgr. that's the doorbell manager struct, bestie, it's giving manager energy 👑

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🧚 DESCRIPTION 🧚

so this function expects that the submission lock is already taken ⚠️ like, it's coming in assuming you already did that part. it does not grab the lock for you, no cap. so handle your locking before you call it or it's gonna be awkward 😭

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⭐ RETURN ⭐

on success it hands you the ID of the allocated GuC doorbell 💚 and on failure you get a negative error code — so check that sign, bestie, don't just assume it worked 🙈

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/xe/xe_guc_db_mgr.c (the source, periodt 📁)
• GuC Doorbells(9)
• xe_guc_db_mgr_init(9)
• xe_guc_db_mgr_release_id_locked(9)
• xe_guc_db_mgr_reserve_range(9)
• xe_guc_db_mgr_release_range(9)
• xe_guc_db_mgr_print(9)

the whole doorbell squad fr fr 👯‍♀️ go read them all, iykyk

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quick vibe check 🫶: lock first, then call. the manpage said so, not me 💀

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and that's the tea, bestie 🍓 this lil page came from ./drivers/gpu/drm/xe, dated October 2026, and it's the xe_guc_db_m...ve_id_locked(9) entry in the Kernel API Manual. slay, go reserve some doorbells 💅✨