page_pool_get_dma_dir(9)

🌈 page_pool_get_dma_dir(9) 💅

okay so this one comes straight out of the Kernel API Manual, and it’s literally the page for page_pool_get_dma_dir(9). Buckle up, bestie. 🎀

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🌸 NAME 🌸

page_pool_get_dma_dir — retrieve the stored DMA direction. That’s the whole assignment. No cap. ✨

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✨ SYNOPSIS ✨

the signature is literally this, character for character:

enum dma_data_direction page_pool_get_dma_dir (const struct page_pool
       *pool );

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🎀 ARGUMENTS 🎀

• pool — the pool from which the page was allocated. That’s the whole argument list, bestie. 🫶

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🦋 DESCRIPTION 🦋

This is lowkey simple: it gets the stored DMA direction. A driver might decide to store this locally and avoid the extra cache line from page_pool just to determine the direction. So instead of doing the extra cache-line detour every time, the driver can just keep that direction tucked away. It’s giving “I already know this, why would I look it up again?” energy. 🔥

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💅 SEE ALSO 💅

• Kernel file ./include/net/page_pool/helpers.h
• page_pool allocator(9)
• page_pool_dev_alloc_pages(9)
• page_pool_dev_alloc_frag(9)
• page_pool_dev_alloc(9)
• page_pool_dev_alloc_va(9)
• page_pool_fragment_page(9)
• page_pool_put_page(9)
• page_pool_put_full_page(9)
• page_pool_recycle_direct(9)
• page_pool_free_va(9)
• page_pool_get_dma_addr(9)
• page_pool_dma_sync_for_cpu(9)
• page_pool_is_unreadable(9)

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Source path: ./include/net/page_pool. Date stamp: October 2026. Page: page_pool_get_dma_dir(9). okay bye bestie, go get that stored DMA direction and slay 💖✨