STRUCT DMA_MAPPING(9)

💅 struct dma_mapping(9)

okay so bestie, welcome to the Kernel API Manual — yes we're literally reading kernel API docs together, this is our bonding time 🫶. Today's main character is struct dma_mapping, and it's exactly what it sounds like: the lil struct that holds information about memory mappings done by the driver. That's it, that's the vibe check ✨.

✨ SYNOPSIS ✨

okay so here's the whole struct, no cap, every field exactly as it appears, do not touch:

struct dma_mapping {
    enum dma_mapping_type type;
    void *u_vaddr;
    void *k_vaddr;
    dma_addr_t dma_addr;
    struct page **page_list;
    dma_addr_t *dma_list;
    unsigned int nr_pages;
    unsigned int size;
    struct list_head card_list;
    struct list_head pin_list;
    int write;
 };

lowkey obsessed with how tidy that is 🎀 but also like… the original docs didn't spell out the members below, so neither will I. We don't invent lore in this house 💀

🌸 Members 🌸

Members

(no like actually — the page leaves this section empty. nothing after the heading. that's the whole section. it's giving mysterious, it's giving enigmatic main character energy 🦋 iykyk)

🔥 SEE ALSO 🔥

all the sibling structs and friends in the same orbit, go say hi bestie 💖:

• Kernel file ./drivers/misc/genwqe/card_base.h
• struct genwqe_reg(9)
• struct ddcb_queue(9)
• struct genwqe_dev(9)
• enum genwqe_requ_state(9)
• struct genwqe_sgl(9)
• struct ddcb_requ(9)
• struct genwqe_file(9)
• genwqe_get_slu_id(9)
• genwqe_write_vreg(9)
• genwqe_read_vreg(9)
• __genwqe_execute_ddcb(9)
• __genwqe_execute_raw_ddcb(9)
• genwqe_is_privileged(9)

and that's the whole page bestie, you ate that 🍓💅

🧚 sign-off time: this lil beauty lives in ./drivers/misc/genwqe, and it's dated October 2026 ⭐ — and yeah, the title was struct dma_mapping(9) all along, we just didn't need to be told twice 👑🌈