amdgpu_gtt_m...lloc_entries(9)

💅 amdgpu_gtt_m...lloc_entries(9) — the Kernel API Manual, bestie edition

okay so you found your way into the kernel API manual, specifically amdgpu_gtt_m...lloc_entries(9), and honestly? iconic of you. this is the group chat where we explain what this little helper does, no gatekeeping, fr fr 💖

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✨ NAME ✨

amdgpu_gtt_mgr_alloc_entries — alloc GART entries without GTT bo 🎀

like, it grabs you GART entries and it does not need a GTT BO to do it. main character behavior ngl.

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🌸 SYNOPSIS 🌸

int amdgpu_gtt_mgr_alloc_entries (struct amdgpu_gtt_mgr *mgr , struct
drm_mm_node *mm_node , u64 num_pages , enum drm_mm_insert_mode mode );

okay so it returns an int, takes four things, and yes the line break in the middle is exactly how the original rolls, we're keeping it, it's giving vintage 💅

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🦋 ARGUMENTS 🦋

• mgr — the GTT manager object. the boss. the one in charge. 🫶
• mm_node — the drm mm node where the new allocation node information gets returned. it's the little vessel that carries the news back to you ✨
• num_pages — the number of pages for the new allocation. count 'em, bestie.
• mode — the new allocation mode. pick your vibe, it's literally in the name 🌈

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💜 DESCRIPTION 💜

so this is the helper that dynamically allocs GART entries to map memory that is not associated with a GTT BO. and before you ask, yes, that's a whole mood — examples include VRAM BO physical memory and remote physical memory 🌟

basically: memory that needs mapping but doesn't have a GTT BO along for the ride gets its GART entries from here. slay.

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👑 SEE ALSO 👑

first up, the kernel file, because that's where the actual lore lives:

• Kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c

then the whole friend group, in order, and yes we're naming every single one, bestie, we don't do partial lists here 🔥

• mem_info_gtt_total(9)
• mem_info_gtt_used(9)
• amdgpu_gtt_mgr_has_gart_addr(9)
• amdgpu_gtt_mgr_mark_bo_teardown(9)
• amdgpu_gtt_mgr_new(9)
• amdgpu_gtt_mgr_del(9)
• amdgpu_gtt_mgr_free_entries(9)
• amdgpu_gtt_mgr_recover(9)
• amdgpu_gtt_mgr_intersects(9)
• amdgpu_gtt_mgr_compatible(9)
• amdgpu_gtt_mgr_debug(9)
• amdgpu_gtt_mgr_init(9)
• amdgpu_gtt_mgr_fini(9)

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and that's the whole page, no crumbs left behind 🍓 this came to you from ./drivers/gpu/drm/amd/amdgpu, dated October 2026 — so mark your calendar, it's giving future icon behavior ⭐ bye bestie, go map something 💅✨