STRUCT DRM_SUBALLOC(9)

💅 struct drm_suballoc(9) 💅

okay so welcome to the Kernel API Manual, bestie — today's main character is struct drm_suballoc, aka the Sub-allocated range. literally what it says on the tin. let's get into it ✨

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🌸 NAME 🌸

struct drm_suballoc — Sub-allocated range 🎀

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✨ SYNOPSIS ✨

struct drm_suballoc {
    struct list_head olist;
    struct list_head flist;
    struct drm_suballoc_manager *manager;
    size_t soffset;
    size_t eoffset;
    struct dma_fence *fence;
 };

no cap, that's the whole vibe right there 🫶

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🦋 Members 🦋

• olist — List link for list of allocated ranges. it's giving "I know a guy who knows a guy" energy 💅
• flist — List linkk for the manager fenced allocated ranges queues. (yes, linkk, with two k's — that's exactly how it's written, we do not fix, we respect 🫡)
• manager — The drm_suballoc_manager. the parent, the icon, the one in charge 👑
• soffset — Start offset. where the range begins, periodt 🌸
• eoffset — End offset + 1 so that eoffset - soffset = size. bestie the +1 is not a typo, it's the whole point — the math is mathing 🧚
• fence — The fence protecting the allocation. it's literally the security guard of this range ngl 💀

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🔥 SEE ALSO 🔥

Kernel file ./include/drm/drm_suballoc.h, struct drm_suballoc_manager(9), drm_suballoc_soffset(9), drm_suballoc_eoffset(9), drm_suballoc_size(9) — go read them, iykyk 📚💖

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lowkey reminder: eoffset is end offset + 1. not + 0. not + 2. don't come for me, that's just how she is 🙈

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and that's the page, bestie!! 🌈 this whole thing lives in ./include/drm and she's stamped October 2026 — slay, iconic, ate, no notes. mwah 💋💜