ttm_kmap_iter_iomap_init(9)

💅 ttm_kmap_iter_iomap_init(9) — like, the Kernel API Manual one 🎀

okay so bestie, welcome to the glow-up era of ttm_kmap_iter_iomap_init, straight out of the Kernel API Manual ✨ this is the function that gets your struct ttm_kmap_iter_iomap all dressed and ready for the group chat, no cap.

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🌸 NAME 🌸

ttm_kmap_iter_iomap_init — Initialize a struct ttm_kmap_iter_iomap 🫶 (yes that's the whole job and she does it well)

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✨ SYNOPSIS ✨

struct ttm_kmap_iter * ttm_kmap_iter_iomap_init (struct
ttm_kmap_iter_iomap *iter_io , struct io_mapping *iomap , struct
sg_table *st , resource_size_t start );

she takes four args and returns a pointer, iconic behavior honestly 👑

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🎀 ARGUMENTS 🎀

• iter_io — the struct ttm_kmap_iter_iomap you want to initialize. this is the main character, she's getting set up 💖
• iomap — the struct io_mapping that represents the underlying linear io_memory. literally the map to the whole vibe 🗺️
• st — the sg_table into iomap, representing the memory of the struct ttm_resource. it's giving "where the actual stuff lives" 🍓
• start — the offset that needs to be subtracted from st so that sg_dma_address(st->sgl) - start == 0 for the iomap start. math girlies rise, this one's non-negotiable 🧮✨

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🔥 RETURN 🔥

Pointer to the embedded struct ttm_kmap_iter. that's it, that's the gift 🎁

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👑 SEE ALSO 👑

the kernel file is right here bestie, go touch grass (the source): ./drivers/gpu/drm/ttm/ttm_resource.c

and the whole extended friend group 💜:

• ttm_resource_cursor_init(9)
• ttm_resource_cursor_fini(9)
• ttm_lru_bulk_move_init(9)
• ttm_lru_bulk_move_fini(9)
• ttm_lru_bulk_move_tail(9)
• ttm_resource_init(9)
• ttm_resource_fini(9)
• ttm_resource_try_charge(9)
• ttm_resource_intersects(9)
• ttm_resource_compatible(9)
• ttm_resource_manager_init(9)
• ttm_resource_manager_usage(9)
• ttm_resource_manager_debug(9)
• ttm_resource_manager_first(9)
• ttm_resource_manager_next(9)
• ttm_lru_first_res_or_null(9)
• Linear io iterator(9)
• ttm_kmap_iter_linear_io_init(9)
• ttm_kmap_iter_linear_io_fini(9)
• ttm_resource_manager_create_debugfs(9)
• ttm_resource_manager_dmem_reclaim(9)
• ttm_resource_manager_set_dmem_region(9)

like, the whole squad showed up 🌈💅

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ngl bestie, if you're calling this you better have a real iomap and a real sg_table ready — she's initializing, not fixing your life 🙈

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and that's the page!! brought to you by ./drivers/gpu/drm/ttm, October 2026 edition — mwah 💋 stay hydrated, read your kernel source, and remember: kmap iterators are temporary but the friendships you make along the way are forever 🌸🦋💖