xe_guc_tlb_...done_handler(9)

💅 xe_guc_tlb_inval_done_handler(9) — bestie's guide to the TLB invalidation done handler

okay so this is from the Kernel API Manual (the xe_guc_tlb_...done_handler(9) page, yes the title is doing the absolute most with those ellipses 💀) and honestly? it's a short one, we're just gonna get into it.

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✨ NAME ✨

xe_guc_tlb_inval_done_handler — the TLB invalidation done handler. that's it, that's the vibe 🎀

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🦋 SYNOPSIS 🦋

int xe_guc_tlb_inval_done_handler (struct xe_guc *guc , u32 *msg , u32
len );

like, it returns an int, takes a struct xe_guc * named guc, a u32 * named msg, and a u32 named len. periodt.

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🌸 ARGUMENTS 🌸

• guc — it's the guc. the struct xe_guc *. that's the whole description, bestie, the docs are being mysterious 🙈
• msg — the message that's indicating TLB invalidation done, iykyk
• len — the length of that message. just, how long it is 💅

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⭐ DESCRIPTION ⭐

so what does it actually do? it parses the seqno of the TLB invalidation, wakes any waiters for that seqno, and signals any invalidation fences for that seqno. the whole girlboss trifecta 🔥

the algorithm for all this depends on the seqno being received in-order, and it asserts that assumption. so like, don't come at it out-of-order, it will not be chill about it 😭

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💖 RETURN 💖

• 0 on success — slay ✨
• -EPROTO for malformed messages — not slay, malformed message detected, we're throwing the protocol error 💀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/xe/xe_guc_tlb_inval.c — go read it, it's giving main character energy 👑
• xe_guc_tlb_inval_init_early(9) — the early-init friend of the family 🫶

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lowkey a reminder that this whole thing lives under ./drivers/gpu/drm/xe because that's where the magic happens 🧚

and that's the page!! mwah 💋 — brought to you by the ./drivers/gpu/drm/xe girlies, dated October 2026, on the xe_guc_tlb_...done_handler(9) manual page. go forth and invalidate those TLBs responsibly, ily 🍓