xe_lmtt_estimate_pt_size(9)

💅 xe_lmtt_estimate_pt_size(9) 💅

okay so bestie, welcome to the Kernel API Manual — yes we're reading kernel docs for fun now, this is the era we're in, and honestly? iconic of us. ✨

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🎀 NAME 🎀

xe_lmtt_estimate_pt_size — literally just estimates the size of LMTT PT allocations. that's the whole job. no cap. 💖

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🦋 SYNOPSIS 🦋

u64 xe_lmtt_estimate_pt_size (struct xe_lmtt *lmtt , u64 size );

look at that signature. clean. pristine. u64 in, u64 out, struct pointer in the middle. we love a return type that means business. 👑

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🌸 ARGUMENTS 🌸

• lmtt — the xe_lmtt. THE one. the main character. 🫶
• size — the size of the LMEM that's gonna be mapped over LMTT, and yes that includes any offset, don't forget the offset, i'm begging you 😭

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⭐ DESCRIPTION ⭐

okay so real talk: this function shall be called only by PF. that's it, that's the rule. not by VF, not by your friend, not by you "just testing something". PF only. periodt. 💅

fr fr, the "shall" is doing a lot of heavy lifting here — this is a hard requirement, not a suggestion 🚨

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🔥 RETURN 🔥

returns the size of the PT allocation(s) needed to support the given LMEM size. that's the vibe check result: a u64 telling you how much PT space you gotta set aside. slay. ✨

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/xe/xe_lmtt.c — the source, the origin story, the birthplace 🧚
• Local Memory Translation Table(9) — the whole LMTT situation, go read it bestie
• xe_lmtt_page_size(9)
• xe_lmtt_init(9)
• xe_lmtt_init_hw(9)
• xe_lmtt_invalidate_hw(9)
• xe_lmtt_prepare_pages(9)
• xe_lmtt_populate_pages(9)
• xe_lmtt_drop_pages(9)

that's a whole friend group right there, they all hang out in the same file and they all get their own man page because they're all that girl 💜

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and that's the page!! brought to you by ./drivers/gpu/drm/xe (the source, the moment, the legend 🌟) — October 2026 edition, xe_lmtt_estimate_pt_size(9) out. mwah 💋 bye bestie, go estimate some page tables 🎀🌸