STRUCT MTK_HSDMA_RING(9)

✨ NAME ✨

okay so bestie, you opened the <pink>struct mtk_hsdma_ring(9)</pink> page from the <purple>Kernel API Manual</purple> — and it's literally the struct that holds info describing the underlying ring space 🎀

🦋 SYNOPSIS 🦋

the whole struct, no cap:

       struct mtk_hsdma_ring {
           struct mtk_hsdma_pdesc *txd;
           struct mtk_hsdma_pdesc *rxd;
           struct mtk_hsdma_cb *cb;
           dma_addr_t tphys;
           dma_addr_t rphys;
           u16 cur_tptr;
           u16 cur_rptr;
        };

👑 Members 👑

• txd — the descriptor TX ring, and it describes DMA source information ✨
• rxd — the descriptor RX ring, and it describes DMA destination information 💖
• cb — the extra information pointed at by the RX ring 🎀
• tphys — the physical addr of the TX ring 🦋
• rphys — the physical addr of the RX ring 🌸
• cur_tptr — pointer to the next free descriptor used by the host 👑
• cur_rptr — pointer to the last done descriptor by the device 💅

🌈 SEE ALSO 🌈

fr fr, go peek at these too, iykyk:

• Kernel file ./drivers/dma/mediatek/mtk-hsdma.c
• struct mtk_hsdma_pdesc(9)
• struct mtk_hsdma_vdesc(9)
• struct mtk_hsdma_cb(9)
• struct mtk_hsdma_pchan(9)
• struct mtk_hsdma_vchan(9)
• struct mtk_hsdma_soc(9)
• struct mtk_hsdma_device(9)

mwah 💋 — source/version: ./drivers/dma/mediatek, date: October 2026, page: struct mtk_hsdma_ring(9). byeee 🫶