ENUM TTM_BO_TYPE(9)

💜 enum ttm_bo_type(9) 💜

okay bestie so this is a page from the Kernel API Manual, and we're about to become unwell about buffer types together. this enum has like three (3) members and honestly? each one is kind of a whole personality. let's get into it 🫶

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🌸 NAME 🌸

enum ttm_bo_type — that's it, that's the name, no little tagline, the enum speaks for itself 💅

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✨ SYNOPSIS ✨

look at her. look at the whole entire girl:

enum ttm_bo_type {
    ttm_bo_type_device ,
    ttm_bo_type_kernel ,
    ttm_bo_type_sg

};

three constants, three vibes, zero notes. yes the spacing is like that, we don't judge, she's iconic as she is 🎀

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💖 Constants 💖

• ttm_bo_type_device — these are the 'normal' buffers, and by normal we mean mmappable by user space, i.e. the ones the mortals can actually touch 👀 every single one of these bos takes up a slot in the device address space, and that slot is what you use for normal vm operations. main character buffer energy fr fr.
• ttm_bo_type_kernel — literally the exact same situation as ttm_bo_type_device buffers, except user space cannot access these. kernel-only use, no entry, no exceptions, VIP section only. ✋ ngl it's giving backstage pass.
• ttm_bo_type_sg — a buffer made from a dmabuf sg table that's shared with another driver. sharing is caring, we love a collaborative moment 🤝✨

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🦋 SEE ALSO 🦋

everything she's linked to, no gatekeeping:

• Kernel file ./include/drm/ttm/ttm_bo.h
• struct ttm_buffer_object(9)
• struct ttm_bo_kmap_obj(9)
• struct ttm_operation_ctx(9)
• struct ttm_lru_walk_arg(9)
• struct ttm_lru_walk(9)
• struct ttm_bo_shrink_flags(9)
• ttm_bo_reserve(9)
• ttm_bo_reserve_slowpath(9)
• ttm_bo_move_null(9)
• ttm_bo_unreserve(9)
• ttm_kmap_obj_virtual(9)
• struct ttm_bo_lru_cursor(9)
• ttm_bo_lru_for_each_reserved_guarded(9)

that's a long list and she ate every single one of those links, periodt 💀🔥

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real talk: this is a kernel API page, so lowkey read the actual docs before you go poking at buffers. we're here for the vibe and the facts 💜

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and that's a wrap bestie!! this one came from ./include/drm/ttm, dated October 2026, and it's still rocking the title enum ttm_bo_type(9) 💅 mwah, go touch some bos (responsibly) 🧚🌸