dma_sb_map_area(9)

💖 NAME 💖

dma_sb_map_area — Map an area of memory into a device dma region. This is the dma_sb_map_area(9) page from the Kernel API Manual, bestie — welcome to the chat ✨.

✨ SYNOPSIS ✨

int dma_sb_map_area (struct ps3_dma_region *r , unsigned long virt_addr
, unsigned long len , dma_addr_t *bus_addr , u64 iopte_flag );

🎀 ARGUMENTS 🎀

• r — Pointer to a struct ps3_dma_region.
• virt_addr — Starting virtual address of the area to map.
• len — Length in bytes of the area to map.
• bus_addr — A pointer to return the starting ioc bus address of the area to map.
• iopte_flag — -- undescribed -- 💀 that’s literally what the page says, so no invented lore here.

🦋 DESCRIPTION 🦋

okay so bestie, this is the common dma mapping routine. That’s the whole description the page gives us — short, sweet, and iconic 💅.

🌈 SEE ALSO 🌈

Kernel file ./arch/powerpc/platforms/ps3/mm.c and all these friends 👑:

• struct mem_region(9)
• struct map(9)
• ps3_mm_phys_to_lpar(9)
• ps3_mm_vas_create(9)
• ps3_mm_vas_destroy(9)
• ps3_mm_region_create(9)
• ps3_mm_region_destroy(9)
• dma_sb_lpar_to_bus(9)
• dma_sb_map_pages(9)
• dma_sb_region_create(9)
• dma_sb_unmap_area(9)
• dma_sb_region_create_linear(9)
• dma_sb_region_free_linear(9)
• dma_sb_map_area_linear(9)
• ps3_mm_init(9)
• ps3_mm_shutdown(9)

🎀 cute little sign-off: this page’s source/version is ./arch/powerpc/platforms/ps3, and it’s dated October 2026. byeee bestie, go map that area 💖✨