STRUCT SA_MAPPED_SG(9)

✨ struct sa_mapped_sg 💅

okay so this is struct sa_mapped_sg, and it lives in the Kernel API Manual — yes bestie, kernel docs, we're doing this 🎀

🌸 NAME 🌸

struct sa_mapped_sg — scatterlist information for tx and rx ✨

like literally the little info bundle that keeps track of what's mapped, where it's going, and whether it needs to be freed. she's organized, she's responsible, we love her 🫶

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🦋 SYNOPSIS 🦋

struct sa_mapped_sg {
    bool mapped;
    enum dma_data_direction dir;
    struct scatterlist static_sg;
    struct scatterlist *split_sg;
    struct sg_table sgt;
 };

look at that struct. five members. no notes. main character energy fr fr 👑

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💖 Members 💖

okay let's go through the whole cast one by one:

• mapped — a bool, and she's set to true if the sgt is mapped. that's the whole vibe check right there ✅
• dir — the mapping direction used for sgt. it's an enum dma_data_direction, so it knows which way the data's flowing 🧭
• static_sg — a struct scatterlist static entry used for overriding data. like when you need to swap in your own thing 💅
• split_sg — a struct scatterlist * that gets set if the sg is split and needs to be freed up. no memory leaks on our watch, bestie 😭
• sgt — the struct sg_table for DMA API use. this is the actual table, the star of the show ⭐

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/crypto/sa2ul.c 😌
• struct sa_cmdl_cfg(9)
• struct algo_data(9)
• struct sa_alg_tmpl(9)
• struct sa_rx_data(9)
• struct sa_req(9)

go read the whole friend group, they all hang out together iykyk 🦋

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and that's the page, bestie — every member, every type, every pointer, nothing skipped, no cap 💯

mwah 💋 this came from ./drivers/crypto, dated October 2026, and it's literally titled struct sa_mapped_sg(9) — slay, that's the whole sign-off 🌈👑