STRUCT PL08X_TXD(9)

✨ struct pl08x_txd(9) ✨

okay so bestie, welcome to the Kernel API Manual 💖 today we're looking at struct pl08x_txd and honestly? it's giving "wrapper energy" and we're obsessed. no cap.

🎀 NAME 🎀

struct pl08x_txd — the wrapper for struct dma_async_tx_descriptor, periodt 💅

🌸 SYNOPSIS 🌸

like, here's the whole vibe, literally character for character:

struct pl08x_txd {
    struct virt_dma_desc vd;
    struct list_head dsg_list;
    dma_addr_t llis_bus;
    u32 *llis_va;
    u32 cctl;
    u32 ccfg;
    bool done;
    bool cyclic;
 };

🦋 Members 🦋

okay let's do a little member-by-member breakdown, because every single one matters, fr fr 🫶

• vd — the virtual DMA descriptor, aka the icon itself 👑
• dsg_list — a list of children sg's. yep, the whole little family tree of them 💀
• llis_bus — the DMA memory address (physical) start for the LLIs 🧚
• llis_va — the virtual memory address start for the LLIs. twin behavior with the one above, lowkey 🌈
• cctl — control reg values for the current txd 🔥
• ccfg — config reg values for the current txd ⭐
• done — this one marks completed descriptors, which should not have their mux released. important!! don't touch, no cap 🙈
• cyclic — indicates cyclic transfers. round and round we go 🎠

💜 SEE ALSO 💜

go check out the Kernel file ./drivers/dma/amba-pl08x.c and all its besties: struct vendor_data(9), struct pl08x_bus_data(9), struct pl08x_phy_chan(9), struct pl08x_sg(9), enum pl08x_dma_chan_state(9), struct pl08x_dma_chan(9), struct pl08x_driver_data(9) ✨ it's a whole squad, iykyk 💅

okay that's the whole read, bestie 🍓 this lil page lives over at ./drivers/dma and the version is dated October 2026 — slay, go forth and struct responsibly 💖✨🎀