STRUCT PS3_DMA_REGION(9)

💖 NAME 💖

struct ps3_dma_region — okay so this is the per-device DMA state variables structure, like literally the little home where one device's DMA situation gets tracked 🫶 that's it that's the name bestie

✨ SYNOPSIS ✨

struct ps3_dma_region {
    struct ps3_system_bus_device *dev;
    const struct ps3_dma_region_ops *region_ops;
    unsigned char ioid;
    enum ps3_dma_page_size page_size;
    enum ps3_dma_region_type region_type;
    unsigned long len;
    unsigned long offset;
    u64 dma_mask;
    unsigned long bus_addr;
    struct {
      spinlock_t lock;
      struct list_head head;
    } chunk_list;
 };

No cap, that's the whole vibe right there 🦋

🎀 Members 🎀

• dev — the device structure, the actual main character this region belongs to 👑
• region_ops — struct ps3_dma_region_ops — the dma region operations, aka the behavior pack 💅
• ioid — the IOID of the device who owns this region fr
• page_size — the ioc pagesize, that's the enum page_size vibe ✨
• region_type — the HV region type (the hypervisor's classification, iykyk)
• len — the length in bytes of the region, like how much room it's taking up 📏
• offset — the offset from the start of memory of the region, its lil starting point 🌸
• dma_mask — the device dma_mask, straightforward slay
• bus_addr — the 'translated' bus address of the region 🔥 (yes, 'translated' in quotes, that's how it's written, don't come for me)
• chunk_list — opaque variable used by the ioc page manager 🫥 it's giving mystery, it's giving "don't touch, the ioc page manager handles it"

💅 SEE ALSO 💅

Kernel file ./arch/powerpc/include/asm/ps3.h — and the whole friend group:

• struct ps3_mmio_region(9)
• ps3_mmio_region_init(9)
• struct ps3_system_bus_device(9)
• struct ps3_system_bus_driver(9)
• ps3_system_bus_set_drvdata(9)
• enum ps3_lpm_rights(9)
• enum ps3_lpm_tb_type(9)

💜 So that's the page!! Sourced from ./arch/powerpc/include/asm, dated October 2026, and titled struct ps3_dma_region(9) — go read the ps3 family, they all ate, no crumbs left 🧚⭐