default_swiotlb_base(9)

okay so bestie, welcome to the default_swiotlb_base(9) page from the Kernel API Manual 💖✨ we're keeping it cute but every fact is staying, periodt.

🌸 NAME 🌸

default_swiotlb_base — get the base address of the default SWIOTLB 🎀

✨ SYNOPSIS ✨

phys_addr_t default_swiotlb_base (void );

🫶 ARGUMENTS 🫶

• void — no arguments. Not one. The void is voiding, bestie 💀

💅 DESCRIPTION 💅

okay so this function is here to get the lowest physical address used by the default software IO TLB pool. That's the whole vibe: lowest physical address, default software IO TLB pool, no cap. 🦋

🌈 SEE ALSO 🌈

The kernel file to peek at is ./kernel/dma/swiotlb.c, and here's the whole squad of related man pages — all of them, exactly as listed:

• struct io_tlb_slot(9)
• struct io_tlb_area(9)
• swiotlb_adjust_nareas(9)
• limit_nareas(9)
• add_mem_pool(9)
• alloc_dma_pages(9)
• swiotlb_alloc_tlb(9)
• swiotlb_free_tlb(9)
• swiotlb_alloc_pool(9)
• swiotlb_dyn_alloc(9)
• __swiotlb_find_pool(9)
• swiotlb_del_pool(9)
• swiotlb_dev_init(9)
• swiotlb_align_offset(9)
• swiotlb_search_pool_area(9)
• swiotlb_search_area(9)
• swiotlb_find_slots(9)
• mem_pool_used(9)
• mem_used(9)
• swiotlb_tbl_map_single(9)
• swiotlb_del_transient(9)
• is_swiotlb_allocated(9)
• default_swiotlb_limit(9)

mwah 💋 that's the page! from ./kernel/dma, dated October 2026, and this was default_swiotlb_base(9) signing off 🎀✨