xdma_prep_dma_cyclic(9)

✨ NAME ✨

okay so bestie, this is the xdma_prep_dma_cyclic(9) page from the Kernel API Manual, and its whole thing is prepare for cyclic DMA transactions. that's the vibe. 🌀💖

🎀 SYNOPSIS 🎀

the signature is literally this, character-for-character:

struct dma_async_tx_descriptor * xdma_prep_dma_cyclic (struct dma_chan
       *chan , dma_addr_t address , size_t size , size_t period_size , enum
       dma_transfer_direction dir , unsigned long flags );

🌸 ARGUMENTS 🌸

every single argument, in order, no skipping — we are not doing that to the group chat:

• chan — DMA channel pointer. your channel handle, periodt.
• address — Device DMA address to access. that's the address bestie.
• size — Total length to transfer. the whole amount.
• period_size — Period size to use for each transfer — wait, no, it's literally the period size to use for each transfer. 🎀
• dir — Transfer direction. which way the data is going.
• flags — Transfer ack flags. the ack flags, no cap.

🦋 SEE ALSO 🦋

Kernel file ./drivers/dma/xilinx/xdma.c, plus the whole friend group in exactly this order:

• struct xdma_desc_block(9)
• struct xdma_chan(9)
• struct xdma_desc(9)
• struct xdma_device(9)
• xdma_link_sg_desc_blocks(9)
• xdma_link_cyclic_desc_blocks(9)
• xdma_channel_init(9)
• xdma_free_desc(9)
• xdma_alloc_desc(9)
• xdma_xfer_start(9)
• xdma_xfer_stop(9)
• xdma_alloc_channels(9)
• xdma_issue_pending(9)
• xdma_terminate_all(9)
• xdma_synchronize(9)
• xdma_fill_descs(9)
• xdma_prep_device_sg(9)
• xdma_prep_interleaved_dma(9)
• xdma_device_config(9)
• xdma_free_chan_resources(9)
• xdma_alloc_chan_resources(9)
• xdma_channel_isr(9)
• xdma_irq_fini(9)
• xdma_set_vector_reg(9)
• xdma_irq_init(9)
• xdma_disable_user_irq(9)
• xdma_enable_user_irq(9)
• xdma_get_user_irq(9)
• xdma_remove(9)
• xdma_probe(9)

xoxo, xdma_prep_dma_cyclic(9) — source ./drivers/dma/xilinx, date October 2026, signing off 💅✨